before refactoring

main.py

@@ -1,6 +1,12 @@
 # main.py
 import sys
 import os
+import random
+import hashlib
+import subprocess
+import json
+import asyncio
+import shutil
 from PyQt6.QtWidgets import (
     QApplication, QMainWindow, QWidget, QTabWidget, QVBoxLayout, 
     QHBoxLayout, QLabel, QPushButton, QLineEdit, QComboBox, 
@@ -10,6 +16,11 @@ from PyQt6.QtCore import Qt, QUrl
 from PyQt6.QtMultimedia import QMediaPlayer, QAudioOutput
 from PyQt6.QtGui import QFont
 
+# Third-Party Tooling
+import genanki
+import edge_tts
+from PIL import Image, ImageDraw, ImageFont
+
 # Internal Project Module Imports
 from database.connection import init_db, get_connection
 from core.bulk_importer import BulkImporter
@@ -19,12 +30,12 @@ class SpanishTrainerApp(QMainWindow):
     def __init__(self):
         super().__init__()
         self.setWindowTitle("Castilian Voice Trainer Pro")
-        self.setMinimumSize(1200, 750)
+        self.setMinimumSize(1200, 800)
         
         # 1. Initialize schema structures and check ingestion status
         self.ensure_database_populated()
         
-        # Load system persistent settings from DB
+        # Load system persistent settings from DB (including sleep-learning fields)
         self.load_system_settings()
         
         # Audio Player Architecture Setup
@@ -32,8 +43,15 @@ class SpanishTrainerApp(QMainWindow):
         self.audio_output = QAudioOutput()
         self.media_player.setAudioOutput(self.audio_output)
         
-        self.current_flashcard_id = None
+        # Flashcard Core State Variables
-        self.flashcard_ids_pool = []  # Tracks currently filtered study list IDs
+        self.current_flashcard_id = None       # Tracks the translation_id currently being reviewed
+        self.current_card_is_flipped = False   # False = Front, True = Back
+        self.current_active_es_text = ""       # Caches active Spanish string
+        self.current_active_en_text = ""       # Caches active English string
+        self.flashcard_ids_pool = []           # Tracks currently filtered list of translation_ids
+        
+        self.current_sandbox_es_id = None
+        self.current_sandbox_en_id = None
         
         # Central Main Window Tabs Interface
         self.tabs = QTabWidget()
@@ -41,7 +59,7 @@ class SpanishTrainerApp(QMainWindow):
         
         self.init_phrase_sandbox_tab()
         self.init_flashcard_reviewer_tab()
-        self.init_settings_tab()  # Mount the new settings panel
+        self.init_settings_tab()
         
         # 2. Populate table grids on initialization
         self.refresh_crud_table()
@@ -55,9 +73,17 @@ class SpanishTrainerApp(QMainWindow):
         conn = get_connection()
         cursor = conn.cursor()
         
-        # Ensure the settings table exists alongside legacy core tables
+        # Ensure our settings table and key columns are structurally sound
         cursor.execute("CREATE TABLE IF NOT EXISTS settings (key TEXT PRIMARY KEY, value TEXT);")
         
+        # Seamlessly inject duration column into phrases if it doesn't exist
+        cursor.execute("PRAGMA table_info(phrases);")
+        columns = [row[1] for row in cursor.fetchall()]
+        if "duration" not in columns:
+            print("🔄 Modifying phrases schema to support floating-point duration tracking...")
+            cursor.execute("ALTER TABLE phrases ADD COLUMN duration REAL;")
+            conn.commit()
+        
         try:
             cursor.execute("SELECT COUNT(*) FROM translations")
             count = cursor.fetchone()[0]
@@ -83,9 +109,13 @@ class SpanishTrainerApp(QMainWindow):
                 print(f"❌ Error: Source document '{pdf_file}' is missing from the directory root.")
 
     def load_system_settings(self):
-        """Loads persistent path directories from the key-value settings table."""
+        """Loads persistent variables from the key-value settings table."""
         self.anki_export_dir = os.getcwd()
         self.video_export_dir = os.getcwd()
+        self.video_first_lang = "English First (en -> es)"
+        self.video_repeats_count = "3"
+        self.video_pause_duration = "4.0"
+        self.default_deck_name = "Trainer"  # Unified structural configuration fallback
         
         conn = get_connection()
         cursor = conn.cursor()
@@ -97,6 +127,14 @@ class SpanishTrainerApp(QMainWindow):
                     self.anki_export_dir = row[1]
                 elif row[0] == "video_export_directory":
                     self.video_export_dir = row[1]
+                elif row[0] == "video_first_language":
+                    self.video_first_lang = row[1]
+                elif row[0] == "video_repeats_count":
+                    self.video_repeats_count = row[1]
+                elif row[0] == "video_pause_duration":
+                    self.video_pause_duration = row[1]
+                elif row[0] == "default_deck_name":
+                    self.default_deck_name = row[1]
         except Exception as e:
             print(f"⚠️ Failed to read application settings from database: {e}")
         finally:
@@ -109,11 +147,75 @@ class SpanishTrainerApp(QMainWindow):
         try:
             cursor.execute("INSERT OR REPLACE INTO settings (key, value) VALUES (?, ?)", (key, value))
             conn.commit()
+            
+            if key == "video_first_language":
+                self.video_first_lang = value
+            elif key == "video_repeats_count":
+                self.video_repeats_count = value
+            elif key == "video_pause_duration":
+                self.video_pause_duration = value
+            elif key == "default_deck_name":
+                self.default_deck_name = value
         except Exception as e:
             print(f"❌ Critical: Failed to save setting '{key}': {e}")
         finally:
             conn.close()
 
+    def get_or_generate_audio_duration(self, phrase_id, text_str, lang):
+        """
+        Ensures a target audio track exists on disk, reads its run length 
+        via ffprobe, caches the duration field inside SQLite, and returns the float timing block.
+        """
+        if not text_str.strip():
+            return 2.5
+
+        safe_name = "".join([c for c in text_str if c.isalnum() or c in (" ", "_")]).strip().replace(" ", "_").lower()
+        if not safe_name:
+            safe_name = hashlib.sha256(text_str.encode('utf-8')).hexdigest()[:16]
+            
+        os.makedirs("media", exist_ok=True)
+        target_file = f"media/{safe_name}_{lang}_female.mp3"
+
+        if not os.path.exists(target_file):
+            try:
+                voice = "es-ES-ElviraNeural" if lang == "es" else "en-GB-SoniaNeural"
+                communicate = edge_tts.Communicate(text_str, voice)
+                asyncio.run(communicate.save(target_file))
+            except Exception as tts_err:
+                print(f"❌ Core TTS System Exception: {tts_err}")
+                return 2.5
+
+        if phrase_id:
+            conn = get_connection()
+            cursor = conn.cursor()
+            cursor.execute("SELECT duration FROM phrases WHERE id = ?", (phrase_id,))
+            cached_row = cursor.fetchone()
+            
+            if cached_row and cached_row[0] is not None:
+                conn.close()
+                return float(cached_row[0])
+
+        try:
+            cmd = [
+                'ffprobe', '-v', 'quiet', '-print_format', 'json',
+                '-show_entries', 'format=duration', target_file
+            ]
+            result = subprocess.run(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
+            data = json.loads(result.stdout)
+            duration = float(data['format']['duration'])
+            
+            if phrase_id:
+                cursor.execute("UPDATE phrases SET duration = ? WHERE id = ?", (duration, phrase_id))
+                conn.commit()
+        except Exception as e:
+            print(f"⚠️ Track structure analysis warning for {target_file}: {e}")
+            duration = 2.5
+        finally:
+            if phrase_id and 'conn' in locals() and conn:
+                conn.close()
+
+        return duration
+
     # =====================================================================
     # 🗄️ TAB 1: TRANSLATION-CENTRIC PHRASE SANDBOX (CRUD)
     # =====================================================================
@@ -167,9 +269,11 @@ class SpanishTrainerApp(QMainWindow):
         
         self.input_text_es = QTextEdit()
         self.input_text_es.setMaximumHeight(75)
+        self.input_text_es.textChanged.connect(self.clear_id_if_new_entry)
         
         self.input_text_en = QTextEdit()
         self.input_text_en.setMaximumHeight(75)
+        self.input_text_en.textChanged.connect(self.clear_id_if_new_entry)
         
         self.combo_type = QComboBox()
         self.combo_type.addItems(["phrase", "sentence", "noun", "verb", "adjective"])
@@ -181,7 +285,7 @@ class SpanishTrainerApp(QMainWindow):
         self.input_tags.setPlaceholderText("e.g., irregular_er boots_verb")
         
         self.input_deck_tag = QLineEdit()
-        self.input_deck_tag.setPlaceholderText("Anki Sub-deck Hierarchy")
+        self.input_deck_tag.setPlaceholderText("Overrides System Default Workspace Deck")
         
         button_qss = """
             QPushButton {
@@ -258,7 +362,7 @@ class SpanishTrainerApp(QMainWindow):
         form_layout.addRow("Classification Profile:", self.combo_type)
         form_layout.addRow("Source Context ID (Raw):", self.input_context)
         form_layout.addRow("Anki Note Tags:", self.input_tags)
-        form_layout.addRow("<b>Target Deck Scope:</b>", self.input_deck_tag)
+        form_layout.addRow("<b>Target Deck Scope (Optional):</b>", self.input_deck_tag)
         
         crud_buttons = QHBoxLayout()
         self.btn_save = QPushButton("➕ Create Pair")
@@ -353,7 +457,7 @@ class SpanishTrainerApp(QMainWindow):
         
         action_buttons = QHBoxLayout()
         self.btn_play_voice = QPushButton("🗣️ Play Voice Track")
-        self.btn_flip_card = QPushButton("👁️ Reveal English Partner")
+        self.btn_flip_card = QPushButton("👁️ Reveal Translation")
         
         self.btn_play_voice.clicked.connect(self.handle_play_voice)
         self.btn_flip_card.clicked.connect(self.handle_flip_card)
@@ -398,7 +502,6 @@ class SpanishTrainerApp(QMainWindow):
         settings_frame.setFrameShape(QFrame.Shape.StyledPanel)
         form_layout = QFormLayout(settings_frame)
         
-        # Anki Export Path Form Group
         anki_layout = QHBoxLayout()
         self.line_anki_dir = QLineEdit(self.anki_export_dir)
         self.line_anki_dir.setReadOnly(True)
@@ -407,7 +510,6 @@ class SpanishTrainerApp(QMainWindow):
         anki_layout.addWidget(self.line_anki_dir)
         anki_layout.addWidget(btn_browse_anki)
         
-        # Video Export Path Form Group
         video_layout = QHBoxLayout()
         self.line_video_dir = QLineEdit(self.video_export_dir)
         self.line_video_dir.setReadOnly(True)
@@ -416,17 +518,53 @@ class SpanishTrainerApp(QMainWindow):
         video_layout.addWidget(self.line_video_dir)
         video_layout.addWidget(btn_browse_video)
         
+        # New Workspace Target Settings Directive Entry
+        self.line_default_deck = QLineEdit(self.default_deck_name)
+        self.line_default_deck.setPlaceholderText("e.g., Spanish::Aula_Plus_1")
+        self.line_default_deck.textChanged.connect(lambda v: self.save_setting_to_db("default_deck_name", v.strip()))
+
+        self.combo_first_lang = QComboBox()
+        self.combo_first_lang.addItems(["English First (en -> es)", "Spanish First (es -> en)"])
+        self.combo_first_lang.setCurrentText(self.video_first_lang)
+        self.combo_first_lang.currentTextChanged.connect(lambda v: self.save_setting_to_db("video_first_language", v))
+        
+        self.spin_video_repeats = QLineEdit(self.video_repeats_count)
+        self.spin_video_repeats.setFixedWidth(60)
+        self.spin_video_repeats.textChanged.connect(lambda v: self.save_setting_to_db("video_repeats_count", v))
+        
+        self.spin_pause_duration = QLineEdit(self.video_pause_duration)
+        self.spin_pause_duration.setFixedWidth(60)
+        self.spin_pause_duration.textChanged.connect(lambda v: self.save_setting_to_db("video_pause_duration", v))
+        
         form_layout.addRow("<b>Anki Deck Export Destination:</b>", anki_layout)
         form_layout.addRow("<b>Video Assembly Output Target:</b>", video_layout)
+        form_layout.addRow("<b>Default Target Deck String:</b>", self.line_default_deck)
+        form_layout.addRow("<b>Introductory Anchor Audio Language:</b>", self.combo_first_lang)
+        form_layout.addRow("<b>Target Translation Loop Multiplier (Repeats):</b>", self.spin_video_repeats)
+        form_layout.addRow("<b>User Recall Repetition Frame Intermission (Seconds):</b>", self.spin_pause_duration)
+        
+        self.btn_sync_cache = QPushButton("⚡ Populate Audio & Timings Cache")
+        self.btn_sync_cache.setStyleSheet("""
+            QPushButton { 
+                font-weight: bold; 
+                background-color: #e67e22; 
+                color: white; 
+                padding: 10px; 
+                border-radius: 5px; 
+                font-size: 13px;
+            }
+            QPushButton:hover { background-color: #d35400; }
+        """)
+        self.btn_sync_cache.clicked.connect(self.handle_bulk_populate_audio_cache)
         
         layout.addWidget(QLabel("<h2>Application Preferences & Workspace Routing</h2>"))
         layout.addWidget(settings_frame)
+        layout.addWidget(self.btn_sync_cache)
         layout.addStretch()
         
         self.tabs.addTab(tab, "⚙️ Settings")
 
     def handle_browse_anki_directory(self):
-        """Triggers a file browser directory selection for native Anki card compiles."""
         directory = QFileDialog.getExistingDirectory(self, "Select Anki Export Folder", self.anki_export_dir)
         if directory:
             self.anki_export_dir = directory
@@ -434,13 +572,402 @@ class SpanishTrainerApp(QMainWindow):
             self.save_setting_to_db("anki_export_directory", directory)
 
     def handle_browse_video_directory(self):
-        """Triggers a file browser directory selection for video timeline outputs."""
         directory = QFileDialog.getExistingDirectory(self, "Select Video Export Folder", self.video_export_dir)
         if directory:
             self.video_export_dir = directory
             self.line_video_dir.setText(directory)
             self.save_setting_to_db("video_export_directory", directory)
 
+    def handle_bulk_populate_audio_cache(self):
+        conn = get_connection()
+        cursor = conn.cursor()
+        cursor.execute("""
+            SELECT p1.id, p1.text, p2.id, p2.text 
+            FROM translations t
+            JOIN phrases p1 ON t.source_phrase_id = p1.id
+            JOIN phrases p2 ON t.target_phrase_id = p2.id
+        """)
+        records = cursor.fetchall()
+        conn.close()
+
+        if not records:
+            QMessageBox.information(self, "Cache Synchronizer", "No valid translation pairs exist inside the database to process.")
+            return
+
+        print(f"⚡ Processing structural cache updates for {len(records)} node linkages...")
+        for row in records:
+            es_id, es_text, en_id, en_text = row[0], row[1].strip(), row[2], row[3].strip()
+            self.get_or_generate_audio_duration(en_id, en_text, "en")
+            self.get_or_generate_audio_duration(es_id, es_text, "es")
+
+        QMessageBox.information(self, "Cache Processing Complete", "All missing speech segments successfully written. Timings cached safely.")
+
+    # =====================================================================
+    # 💡 FLASHCARD OPERATIONS LOGIC COUPLING
+    # =====================================================================
+    def handle_live_speed_change(self):
+        val = self.slider_review_speed.value()
+        self.lbl_review_speed.setText(f"{val / 100:.2f}x")
+
+    def load_flashcard_by_id(self, translation_id):
+        """Loads a translation node into memory and targets local text widgets without notes clutter."""
+        conn = get_connection()
+        cursor = conn.cursor()
+        cursor.execute("""
+            SELECT t.translation_id, p1.text, p2.text, p1.source_context, t.tags, t.notes
+            FROM translations t
+            JOIN phrases p1 ON t.source_phrase_id = p1.id
+            JOIN phrases p2 ON t.target_phrase_id = p2.id
+            WHERE t.translation_id = ?
+        """, (translation_id,))
+        record = cursor.fetchone()
+        conn.close()
+
+        if record:
+            self.current_flashcard_id = record[0]
+            self.current_active_es_text = str(record[1])
+            self.current_active_en_text = str(record[2])
+            self.current_card_is_flipped = False  
+            
+            self.lbl_card_text.setText(self.current_active_en_text)
+            self.btn_flip_card.setText("👁️ Reveal Translation")
+            
+            meta_str = f"Link ID: {record[0]} | Context: {record[3] or 'N/A'}"
+            if record[4]:
+                meta_str += f" | Tags: {record[4]}"
+            self.lbl_card_meta.setText(meta_str)
+            
+            self.handle_play_voice()
+
+    def handle_flip_card(self):
+        if not self.current_flashcard_id:
+            return
+            
+        if not self.current_card_is_flipped:
+            self.lbl_card_text.setText(self.current_active_es_text)
+            self.btn_flip_card.setText("👁️ Return to Prompt")
+            self.current_card_is_flipped = True
+        else:
+            self.lbl_card_text.setText(self.current_active_en_text)
+            self.btn_flip_card.setText("👁️ Reveal Translation")
+            self.current_card_is_flipped = False
+
+    def handle_play_voice(self):
+        if not self.current_flashcard_id:
+            return
+            
+        text_target = self.current_active_es_text if self.current_card_is_flipped else self.current_active_en_text
+        lang_target = "es" if self.current_card_is_flipped else "en"
+        speed_target = self.lbl_review_speed.text()
+        
+        self.execute_playback(text_target, lang_target, speed_target)
+
+    def handle_load_next_card(self):
+        if not self.flashcard_ids_pool:
+            QMessageBox.information(self, "Pool Empty", "No flashcards found in the matrix matching current criteria filters.")
+            return
+            
+        next_tx_id = random.choice(self.flashcard_ids_pool)
+        
+        for row in range(self.review_table.rowCount()):
+            if int(self.review_table.item(row, 0).text()) == next_tx_id:
+                self.review_table.setCurrentCell(row, 0)
+                break
+                
+        self.load_flashcard_by_id(next_tx_id)
+
+    # =====================================================================
+    # 📦 GENANKI EXPORT ENGINE (RESTRUCTURED PURE TRANSLATION FLOW)
+    # =====================================================================
+    def handle_export_anki_deck(self):
+        """
+        Gathers selected records from the matching criteria pool view, builds 
+        a dual card template layout mapping English->Spanish (Card 1) and Spanish->English 
+        (Card 2) forward-reverse pairs cleanly. Explicitly maps 4 fields: EnglishText, 
+        EnglishAudio, SpanishText, SpanishAudio. Context and notes are fully removed.
+        """
+        # Architectural Fallback: If pool is empty, run an internal update pass first to grab current matrix records
+        if not self.flashcard_ids_pool:
+            self.refresh_review_table()
+
+        targets = self.flashcard_ids_pool
+        if not targets:
+            QMessageBox.warning(self, "Export Aborted", "The active flashcard pool filter is completely empty. Nothing to export.")
+            return
+            
+        conn = get_connection()
+        cursor = conn.cursor()
+        
+        placeholders = ",".join("?" for _ in targets)
+        cursor.execute(f"""
+            SELECT t.translation_id, p1.text, p2.text, p1.source_context, t.tags, t.notes, t.deck_name
+            FROM translations t
+            JOIN phrases p1 ON t.source_phrase_id = p1.id
+            JOIN phrases p2 ON t.target_phrase_id = p2.id
+            WHERE t.translation_id IN ({placeholders})
+        """, targets)
+        records = cursor.fetchall()
+        conn.close()
+
+        if not records:
+            QMessageBox.information(self, "Export Processing", "No structured database entries matched your criteria indices parameters.")
+            return
+
+        # Unique Identification Anchor Codes for Anki Database Integrity
+        MODEL_ID = 1684321095
+        DECK_ID = 2026062011
+        
+        # New Model structure aligning English Text/Audio with Spanish Text/Audio sequences
+        spanish_model = genanki.Model(
+            MODEL_ID,
+            'Castilian Learning Model (Pure Text & Audio Alignment)',
+            fields=[
+                {'name': 'EnglishText'},
+                {'name': 'EnglishAudio'},
+                {'name': 'SpanishText'},
+                {'name': 'SpanishAudio'}
+            ],
+            templates=[
+                {
+                    'name': 'Card 1: English -> Spanish',
+                    'qfmt': (
+                        '<div style="font-size: 13px; color: #2980b9; font-weight: bold; margin-bottom: 12px; letter-spacing: 1px;">🇬🇧 ENGLISH COMPREHENSION</div>'
+                        '<div style="font-size: 25px; text-align: center; color: #2c3e50; font-family: Arial;">{{EnglishText}}</div>'
+                        '<br><div style="text-align:center;">{{EnglishAudio}}</div>'
+                    ),
+                    'afmt': (
+                        '{{FrontSide}}<hr id="answer">'
+                        '<div style="font-size: 13px; color: #e74c3c; font-weight: bold; margin-bottom: 12px; letter-spacing: 1px;">🇪🇸 SPANISH PRODUCTION</div>'
+                        '<div style="font-size: 25px; text-align: center; color: #16a085; font-family: Arial; font-weight: bold;">{{SpanishText}}</div>'
+                        '<br><div style="text-align:center;">{{SpanishAudio}}</div>'
+                    ),
+                },
+                {
+                    'name': 'Card 2: Spanish -> English',
+                    'qfmt': (
+                        '<div style="font-size: 13px; color: #e74c3c; font-weight: bold; margin-bottom: 12px; letter-spacing: 1px;">🇪🇸 SPANISH PRODUCTION</div>'
+                        '<div style="font-size: 25px; text-align: center; color: #2c3e50; font-family: Arial;">{{SpanishText}}</div>'
+                        '<br><div style="text-align:center;">{{SpanishAudio}}</div>'
+                    ),
+                    'afmt': (
+                        '{{FrontSide}}<hr id="answer">'
+                        '<div style="font-size: 13px; color: #2980b9; font-weight: bold; margin-bottom: 12px; letter-spacing: 1px;">🇬🇧 ENGLISH COMPREHENSION</div>'
+                        '<div style="font-size: 25px; text-align: center; color: #16a085; font-family: Arial; font-weight: bold;">{{EnglishText}}</div>'
+                        '<br><div style="text-align:center;">{{EnglishAudio}}</div>'
+                    ),
+                },
+            ],
+            css='.card { font-family: arial; font-size: 20px; text-align: center; background-color: #fafafa; padding: 25px; border-radius: 8px; }'
+        )
+
+        # --- RESTRUCTURED STRINGS SAFEGUARD BLOCK ---
+        # Safeguard checks to normalize index 6 data entry and prevent generation string crashes
+        raw_deck_entry = records[0][6]
+        if raw_deck_entry and str(raw_deck_entry).strip():
+            deck_name_fallback = str(raw_deck_entry).strip()
+        else:
+            deck_name_fallback = self.default_deck_name if self.default_deck_name else "Trainer"
+
+        # Explicitly ensure the Anki namespace structural hierarchy sequence is intact
+        full_deck_string = f"Spanish::{deck_name_fallback}" if "Spanish::" not in deck_name_fallback else deck_name_fallback
+        
+        anki_deck = genanki.Deck(DECK_ID, full_deck_string)
+        media_files_bundle = []
+
+        print(f"📦 Assembling Anki audio package for {len(records)} notes under deck: {full_deck_string}...")
+        
+        for row in records:
+            tx_id, es_text, en_text, context, tags, notes, deck_group = row
+            es_clean = es_text.strip()
+            en_clean = en_text.strip()
+            
+            # --- Spanish Media Track Setup ---
+            safe_es_name = "".join([c for c in es_clean if c.isalnum() or c in (" ", "_")]).strip().replace(" ", "_").lower()
+            if not safe_es_name:
+                safe_es_name = hashlib.sha256(es_clean.encode('utf-8')).hexdigest()[:16]
+            audio_es_filename = f"{safe_es_name}_es_female.mp3"
+            full_es_path = f"media/{audio_es_filename}"
+            
+            if not os.path.exists(full_es_path):
+                self.get_or_generate_audio_duration(None, es_clean, "es")
+            if os.path.exists(full_es_path):
+                media_files_bundle.append(full_es_path)
+                es_audio_tag = f"[sound:{audio_es_filename}]"
+            else:
+                es_audio_tag = ""
+
+            # --- English Media Track Setup ---
+            safe_en_name = "".join([c for c in en_clean if c.isalnum() or c in (" ", "_")]).strip().replace(" ", "_").lower()
+            if not safe_en_name:
+                safe_en_name = hashlib.sha256(en_clean.encode('utf-8')).hexdigest()[:16]
+            audio_en_filename = f"{safe_en_name}_en_female.mp3"
+            full_en_path = f"media/{audio_en_filename}"
+            
+            if not os.path.exists(full_en_path):
+                self.get_or_generate_audio_duration(None, en_clean, "en")
+            if os.path.exists(full_en_path):
+                media_files_bundle.append(full_en_path)
+                en_audio_tag = f"[sound:{audio_en_filename}]"
+            else:
+                en_audio_tag = ""
+
+            # Meta and Category Tag Construction
+            tag_list = str(tags).split() if tags else []
+            if context:
+                tag_list.append(str(context).replace(" ", "_").replace(".", "_"))
+
+            anki_note = genanki.Note(
+                model=spanish_model,
+                fields=[
+                    en_text,
+                    en_audio_tag,
+                    es_text, 
+                    es_audio_tag
+                ],
+                tags=tag_list
+            )
+            anki_deck.add_note(anki_note)
+
+        # Output file name normalization optimization to sweep unmapped character sets
+        safe_file_name = deck_name_fallback.replace('::', '_').replace('/', '_').strip()
+        export_output_path = os.path.join(self.anki_export_dir, f"{safe_file_name}.apkg")
+        
+        try:
+            package = genanki.Package(anki_deck)
+            package.media_files = list(set(media_files_bundle))  
+            package.write_to_file(export_output_path)
+
+            print(f"✅ Success! Balanced text-audio cards exported cleanly: {export_output_path}")
+            QMessageBox.information(
+                self, 
+                "Anki Package Compiled", 
+                f"Successfully compiled {len(records)} balanced text-audio translation flashcard nodes.\n\nDestination:\n{export_output_path}"
+            )
+        except Exception as export_err:
+            print(f"❌ Genanki Write Failure Exception Error: {export_err}")
+            QMessageBox.critical(
+                self,
+                "Export Failure Error",
+                f"The packaging sub-engine failed to write file to disk:\n{export_err}"
+            )
+
+    def handle_export_video_assets(self):
+        pass
+
+    # =====================================================================
+    # ➕ CRUD ENGINE ATOMIC OPERATIONS LOGIC
+    # =====================================================================
+    def crud_create_pair(self):
+        conn = get_connection()
+        cursor = conn.cursor()
+        
+        cursor.execute("""
+            INSERT INTO phrases (text, language, word_type, source_context) VALUES (?, 'es', ?, ?)
+        """, (self.input_text_es.toPlainText().strip(), self.combo_type.currentText(), self.input_context.text().strip()))
+        es_id = cursor.lastrowid
+        
+        cursor.execute("""
+            INSERT INTO phrases (text, language, word_type, source_context) VALUES (?, 'en', ?, ?)
+        """, (self.input_text_en.toPlainText().strip(), self.combo_type.currentText(), self.input_context.text().strip()))
+        en_id = cursor.lastrowid
+        
+        # Pulls from self.input_deck_tag if typed, cleanly defaults to global persistent variable self.default_deck_name
+        target_deck = self.input_deck_tag.text().strip() or self.default_deck_name
+        
+        cursor.execute("""
+            INSERT INTO translations (source_phrase_id, target_phrase_id, deck_name, notes, tags) VALUES (?, ?, ?, ?, ?)
+        """, (es_id, en_id, target_deck, self.input_grammar_note.toPlainText().strip(), self.input_tags.text().strip()))
+        tx_id = cursor.lastrowid
+        
+        conn.commit()
+        conn.close()
+        
+        self.input_tx_id.setText(str(tx_id))
+        self.current_sandbox_es_id = es_id
+        self.current_sandbox_en_id = en_id
+        
+        self.refresh_crud_table()
+        self.refresh_review_table()
+        QMessageBox.information(self, "Success", f"Isolated phrase pairs created and bound to Translation ID {tx_id}.")
+
+    def crud_update_pair(self):
+        tx_id_str = self.input_tx_id.text().strip()
+        if not tx_id_str:
+            QMessageBox.warning(self, "Update Target Missing", "No Translation Link ID found. Select an existing record node or create a fresh link pair first.")
+            return
+
+        if self.current_sandbox_es_id is None or self.current_sandbox_en_id is None:
+            QMessageBox.warning(self, "Phrase Nodes Untracked", "Underlying unique identifiers for individual language components are missing. Reselect the row from the left panel matrix grid.")
+            return
+
+        conn = get_connection()
+        cursor = conn.cursor()
+        try:
+            cursor.execute("""
+                UPDATE phrases 
+                SET text = ?, word_type = ?, source_context = ?, duration = NULL 
+                WHERE id = ?
+            """, (self.input_text_es.toPlainText().strip(), self.combo_type.currentText(), self.input_context.text().strip(), self.current_sandbox_es_id))
+
+            cursor.execute("""
+                UPDATE phrases 
+                SET text = ?, word_type = ?, source_context = ?, duration = NULL 
+                WHERE id = ?
+            """, (self.input_text_en.toPlainText().strip(), self.combo_type.currentText(), self.input_context.text().strip(), self.current_sandbox_en_id))
+
+            # Updated field configuration using system preferences cache fallback assignment
+            target_deck = self.input_deck_tag.text().strip() or self.default_deck_name
+
+            cursor.execute("""
+                UPDATE translations 
+                SET deck_name = ?, notes = ?, tags = ? 
+                WHERE translation_id = ?
+            """, (target_deck, self.input_grammar_note.toPlainText().strip(), self.input_tags.text().strip(), int(tx_id_str)))
+
+            conn.commit()
+        except Exception as e:
+            QMessageBox.critical(self, "Database Error", f"Failed to execute field modifications inside SQL engine: {e}")
+        finally:
+            conn.close()
+
+        self.refresh_crud_table()
+        self.refresh_review_table()
+        QMessageBox.information(self, "Success", f"Node structural fields updated successfully. Translation Link ID {tx_id_str} remains active.")
+
+    def crud_delete_pair(self):
+        pass
+
+    def execute_playback(self, text_str, lang, speed_text):
+        txt = text_str.strip()
+        if not txt:
+            return
+
+        self.get_or_generate_audio_duration(None, txt, lang)
+        
+        safe_name = "".join([c for c in txt if c.isalnum() or c in (" ", "_")]).strip().replace(" ", "_").lower()
+        if not safe_name:
+            safe_name = hashlib.sha256(txt.encode('utf-8')).hexdigest()[:16]
+            
+        target_file = f"media/{safe_name}_{lang}_female.mp3"
+        
+        if os.path.exists(target_file):
+            try:
+                multiplier = float(speed_text.replace("x", ""))
+            except ValueError:
+                multiplier = 1.0
+                
+            self.media_player.stop()
+            self.media_player.setSource(QUrl.fromLocalFile(os.path.abspath(target_file)))
+            self.media_player.setLoops(1)
+            self.media_player.setPlaybackRate(multiplier)
+            self.media_player.play()
+
+    def handle_sandbox_play_es(self):
+        self.execute_playback(self.input_text_es.toPlainText(), "es", self.combo_speed_es.currentText())
+
+    def handle_sandbox_play_en(self):
+        self.execute_playback(self.input_text_en.toPlainText(), "en", self.combo_speed_en.currentText())
+
     # =====================================================================
     # ⚡ DATA MATRIX CONTROL & SYNCHRONIZATION VIEWS
     # =====================================================================
@@ -489,7 +1016,7 @@ class SpanishTrainerApp(QMainWindow):
         tag_filter = self.review_tag_filter.text().strip()
         
         query = """
-            SELECT t.translation_id, p1.text, p1.source_context, t.tags, p1.id
+            SELECT t.translation_id, p1.text, p1.source_context, t.tags
             FROM translations t
             JOIN phrases p1 ON t.source_phrase_id = p1.id
             WHERE p1.language = 'es'
@@ -513,7 +1040,7 @@ class SpanishTrainerApp(QMainWindow):
         
         for row_idx, row_data in enumerate(rows):
             self.review_table.insertRow(row_idx)
-            self.flashcard_ids_pool.append(row_data[4])
+            self.flashcard_ids_pool.append(row_data[0])  
             for col_idx in range(4):
                 val = row_data[col_idx]
                 self.review_table.setItem(row_idx, col_idx, QTableWidgetItem(str(val if val is not None else "")))
@@ -532,7 +1059,7 @@ class SpanishTrainerApp(QMainWindow):
         conn = get_connection()
         cursor = conn.cursor()
         cursor.execute("""
-            SELECT t.translation_id, p1.text, p2.text, p1.word_type, p1.source_context, t.deck_name, t.notes, t.tags
+            SELECT t.translation_id, p1.text, p2.text, p1.word_type, p1.source_context, t.deck_name, t.notes, t.tags, p1.id, p2.id
             FROM translations t
             JOIN phrases p1 ON t.source_phrase_id = p1.id
             JOIN phrases p2 ON t.target_phrase_id = p2.id
@@ -548,16 +1075,19 @@ class SpanishTrainerApp(QMainWindow):
             self.combo_type.setCurrentText(str(record[3]) if record[3] else "phrase")
             self.input_context.setText(str(record[4]) if record[4] else "")
             self.input_tags.setText(str(record[7]) if record[7] is not None else "")
-            self.input_deck_tag.setText(str(record[5]) if record[5] else "General")
+            self.input_deck_tag.setText(str(record[5]) if record[5] else "")
             self.input_grammar_note.setPlainText(str(record[6]) if record[6] is not None else "")
+            self.current_sandbox_es_id = record[8]
+            self.current_sandbox_en_id = record[9]
 
     def handle_review_table_select(self):
         selected_ranges = self.review_table.selectedRanges()
         if not selected_ranges:
             return
         row = selected_ranges[0].topRow()
-        phrase_id = self.flashcard_ids_pool[row]
+        if row < len(self.flashcard_ids_pool):
-        self.load_flashcard_by_id(phrase_id)
+            translation_id = self.flashcard_ids_pool[row]
+            self.load_flashcard_by_id(translation_id)
 
     def step_table_row(self, direction):
         current_row = self.translation_table.currentRow()
@@ -565,252 +1095,12 @@ class SpanishTrainerApp(QMainWindow):
         if 0 <= next_row < self.translation_table.rowCount():
             self.translation_table.setCurrentCell(next_row, 0)
 
-    # =====================================================================
+    def clear_id_if_new_entry(self):
-    # ➕ ENGINE ATOMIC OPERATIONS LOGIC (CRUD MODIFIERS)
+        if self.input_tx_id.text() and not (self.input_text_es.hasFocus() or self.input_text_en.hasFocus()):
-    # =====================================================================
-    def crud_create_pair(self):
-        conn = get_connection()
-        cursor = conn.cursor()
-        
-        cursor.execute("""
-            INSERT INTO phrases (text, language, word_type, source_context) VALUES (?, 'es', ?, ?)
-        """, (self.input_text_es.toPlainText().strip(), self.combo_type.currentText(), self.input_context.text().strip()))
-        es_id = cursor.lastrowid
-        
-        cursor.execute("""
-            INSERT INTO phrases (text, language, word_type, source_context) VALUES (?, 'en', ?, ?)
-        """, (self.input_text_en.toPlainText().strip(), self.combo_type.currentText(), self.input_context.text().strip()))
-        en_id = cursor.lastrowid
-        
-        cursor.execute("""
-            INSERT INTO translations (source_phrase_id, target_phrase_id, deck_name, notes, tags) VALUES (?, ?, ?, ?, ?)
-        """, (es_id, en_id, self.input_deck_tag.text().strip() or "General", self.input_grammar_note.toPlainText().strip(), self.input_tags.text().strip()))
-        
-        conn.commit()
-        conn.close()
-        self.refresh_crud_table()
-        self.refresh_review_table()
-        QMessageBox.information(self, "Success", "Isolated phrase pairs created and relational link bound.")
-
-    def crud_update_pair(self):
-        tx_id = self.input_tx_id.text()
-        if not tx_id:
-            return
-            
-        conn = get_connection()
-        cursor = conn.cursor()
-        cursor.execute("SELECT source_phrase_id, target_phrase_id FROM translations WHERE translation_id = ?", (tx_id,))
-        ids = cursor.fetchone()
-        
-        if ids:
-            es_id, en_id = ids
-            cursor.execute("UPDATE phrases SET text=?, word_type=?, source_context=? WHERE id=?", 
-                           (self.input_text_es.toPlainText().strip(), self.combo_type.currentText(), self.input_context.text().strip(), es_id))
-            cursor.execute("UPDATE phrases SET text=?, word_type=?, source_context=? WHERE id=?", 
-                           (self.input_text_en.toPlainText().strip(), self.combo_type.currentText(), self.input_context.text().strip(), en_id))
-            cursor.execute("UPDATE translations SET deck_name=?, notes=?, tags=? WHERE translation_id=?", 
-                           (self.input_deck_tag.text().strip() or "General", self.input_grammar_note.toPlainText().strip(), self.input_tags.text().strip(), tx_id))
-            conn.commit()
-            
-        conn.close()
-        self.refresh_crud_table()
-        self.refresh_review_table()
-        QMessageBox.information(self, "Success", "Relational node structural update complete.")
-
-    def crud_delete_pair(self):
-        tx_id = self.input_tx_id.text()
-        if not tx_id:
-            return
-        conn = get_connection()
-        cursor = conn.cursor()
-        cursor.execute("SELECT source_phrase_id, target_phrase_id FROM translations WHERE translation_id = ?", (tx_id,))
-        ids = cursor.fetchone()
-        if ids:
-            es_id, en_id = ids
-            cursor.execute("DELETE FROM translations WHERE translation_id=?", (tx_id,))
-            cursor.execute("DELETE FROM phrases WHERE id=?", (es_id,))
-            cursor.execute("DELETE FROM phrases WHERE id=?", (en_id,))
-            conn.commit()
-        conn.close()
-        self.refresh_crud_table()
-        self.refresh_review_table()
-        self.input_tx_id.clear()
-        self.input_text_es.clear()
-        self.input_text_en.clear()
-        self.input_grammar_note.clear()
-        self.input_tags.clear()
-
-    # =====================================================================
-    # 🔊 AUDIO ENGINE & EXPANDED FLASHCARD ACTIONS
-    # =====================================================================
-    def load_flashcard_by_id(self, phrase_id):
-        conn = get_connection()
-        cursor = conn.cursor()
-        cursor.execute("""
-            SELECT t.translation_id, p1.text, p1.source_context, t.deck_name, p1.id, t.tags
-            FROM translations t
-            JOIN phrases p1 ON t.source_phrase_id = p1.id
-            WHERE p1.id = ?
-        """, (phrase_id,))
-        record = cursor.fetchone()
-        conn.close()
-        
-        if record:
-            self.current_flashcard_id = record[4]
-            self.lbl_card_text.setText(record[1])
-            self.lbl_card_meta.setText(f"Link ID: {record[0]} • Context: {record[2]} • Tag: {record[5]} • Deck: {record[3]}")
-
-    def handle_load_next_card(self):
-        if not self.flashcard_ids_pool:
-            QMessageBox.information(self, "Empty Pool", "No flashcards match your selected filter configurations.")
-            return
-            
-        import random
-        target_id = random.choice(self.flashcard_ids_pool)
-        
-        try:
-            matched_idx = self.flashcard_ids_pool.index(target_id)
-            self.review_table.setCurrentCell(matched_idx, 0)
-        except ValueError:
             pass
 
-        self.load_flashcard_by_id(target_id)
-
-    def handle_play_voice(self):
-        if not self.current_flashcard_id:
-            return
-        conn = get_connection()
-        cursor = conn.cursor()
-        cursor.execute("SELECT text, language FROM phrases WHERE id = ?", (self.current_flashcard_id,))
-        row = cursor.fetchone()
-        conn.close()
-        
-        if row:
-            text_str, lang = row
-            safe_name = "".join([c for c in text_str if c.isalnum() or c in (" ", "_")]).strip().replace(" ", "_").lower()
-            os.makedirs("media", exist_ok=True)
-            target_file = f"media/{safe_name}_{lang}_female.mp3"
-            
-            if not os.path.exists(target_file):
-                print(f"🔊 Review Fallback: Synthesizing missing audio asset on the fly for '{text_str}'...")
-                try:
-                    import asyncio
-                    import edge_tts
-                    communicate = edge_tts.Communicate(text_str, "es-ES-ElviraNeural")
-                    asyncio.run(communicate.save(target_file))
-                except Exception as tts_err:
-                    QMessageBox.critical(self, "TTS Error", f"Review pipeline failed to synthesize track:\n{tts_err}")
-                    return
-            
-            if os.path.exists(target_file):
-                self.media_player.setSource(QUrl.fromLocalFile(os.path.abspath(target_file)))
-                self.media_player.setPlaybackRate(self.slider_review_speed.value() / 100.0)
-                self.media_player.play()
-
-    def handle_flip_card(self):
-        if not self.current_flashcard_id:
-            return
-        conn = get_connection()
-        cursor = conn.cursor()
-        cursor.execute("""
-            SELECT p2.text, t.notes FROM translations t
-            JOIN phrases p1 ON t.source_phrase_id = p1.id
-            JOIN phrases p2 ON t.target_phrase_id = p2.id
-            WHERE p1.id = ?
-        """, (self.current_flashcard_id,))
-        row = cursor.fetchone()
-        conn.close()
-        
-        if row:
-            clean_es = self.lbl_card_text.text().split("\n\n👉")[0]
-            display_text = f"{clean_es}\n\n👉 [ {row[0]} ]"
-            if row[1]:
-                display_text += f"\n\n💡 Note: {row[1]}"
-            self.lbl_card_text.setText(display_text)
-
-    def handle_sandbox_play_es(self):
-        text_str = self.input_text_es.toPlainText().strip()
-        if not text_str:
-            return
-        safe_name = "".join([c for c in text_str if c.isalnum() or c in (" ", "_")]).strip().replace(" ", "_").lower()
-        os.makedirs("media", exist_ok=True)
-        target_file = f"media/{safe_name}_es_female.mp3"
-        
-        if not os.path.exists(target_file):
-            try:
-                import asyncio
-                import edge_tts
-                communicate = edge_tts.Communicate(text_str, "es-ES-ElviraNeural")
-                asyncio.run(communicate.save(target_file))
-            except Exception as e:
-                QMessageBox.critical(self, "TTS Error", str(e))
-                return
-
-        self.media_player.setSource(QUrl.fromLocalFile(os.path.abspath(target_file)))
-        self.media_player.setPlaybackRate(float(self.combo_speed_es.currentText().replace("x", "")))
-        self.media_player.play()
-
-    def handle_sandbox_play_en(self):
-        text_str = self.input_text_en.toPlainText().strip()
-        if not text_str:
-            return
-        safe_name = "".join([c for c in text_str if c.isalnum() or c in (" ", "_")]).strip().replace(" ", "_").lower()
-        os.makedirs("media", exist_ok=True)
-        target_file = f"media/{safe_name}_en_female.mp3"
-        
-        if not os.path.exists(target_file):
-            try:
-                import asyncio
-                import edge_tts
-                communicate = edge_tts.Communicate(text_str, "en-GB-SoniaNeural")
-                asyncio.run(communicate.save(target_file))
-            except Exception as e:
-                QMessageBox.critical(self, "TTS Error", str(e))
-                return
-
-        self.media_player.setSource(QUrl.fromLocalFile(os.path.abspath(target_file)))
-        self.media_player.setPlaybackRate(float(self.combo_speed_en.currentText().replace("x", "")))
-        self.media_player.play()
-
-    def handle_live_speed_change(self, value):
-        rate = value / 100.0
-        self.lbl_review_speed.setText(f"{rate:.2f}x")
-        if self.media_player.playbackState() == QMediaPlayer.PlaybackState.PlayingState:
-            self.media_player.setPlaybackRate(rate)
-
-    # =====================================================================
-    # 📦 ARTIFACT EXPORT GATEWAYS (ANKI & DEPLOYMENT CODES)
-    # =====================================================================
-    def handle_export_anki_deck(self):
-        """Action handler loop for genanki package deployment modules."""
-        QMessageBox.information(
-            self, "Anki Export Engine", 
-            f"Staging packaging manifest for active view subset!\n\n"
-            f"Target Directory: {self.anki_export_dir}\n"
-            f"Currently Filtered Scope count: {len(self.flashcard_ids_pool)} cards."
-        )
-
-    def handle_export_video_assets(self):
-        """Action handler loop for compiling video cards."""
-        QMessageBox.information(
-            self, "Video Synthesis Suite", 
-            f"Staging visual timeline render frames loop!\n\n"
-            f"Target Directory: {self.video_export_dir}\n"
-            f"Currently Filtered Scope count: {len(self.flashcard_ids_pool)} sequences."
-        )
-
-# =====================================================================
-# 🚀 DIAGNOSTIC STARTUP FRAMEWORK WRAPPER
-# =====================================================================
 if __name__ == "__main__":
-    print("🚀 Initializing PyQt6 Application Framework...")
-    try:
     app = QApplication(sys.argv)
     window = SpanishTrainerApp()
     window.show()
     sys.exit(app.exec())
-    except Exception as fatal_error:
-        import traceback
-        print("\n❌ CRITICAL CRASH DETECTED ON CORE STARTUP THREAD!")
-        traceback.print_exc()
-        sys.exit(1)