# PyQt5 Application Development Progress

**Project:** Tesla Coil Spark Physics Course - Interactive Desktop Application
**Started:** 2025-10-10
**Current Status:** Phase 2 - Main Window Complete ✅

---

## Phase 1: Core Setup & Infrastructure (COMPLETED)

### ✅ Completed Files

**1. Environment & Launch**
- ✅ `run.bat` - Launch script with virtual environment management
- ✅ `requirements.txt` - PyQt5 and all dependencies

**2. Database**
- ✅ `resources/database/schema.sql` - Complete SQLite schema (8 tables)
- ✅ `app/database.py` - Database manager with convenience methods

**3. Configuration**
- ✅ `app/config.py` - All paths, constants, colors, settings

**4. Course Model**
- ✅ `app/models/course_model.py` - Complete course structure loader
  - Course, Part, Section, Lesson, LearningPath classes
  - Fast lesson lookup by ID
  - Navigation (next/prev lesson)
  - Search by title/tag
  - Learning path filtering

**5. Application Entry**
- ✅ `app/main.py` - Basic application launcher
- ✅ `app/__init__.py` - Package initialization
- ✅ `app/models/__init__.py` - Models package

### Database Schema

**Tables Created:**
1. **users** - User profiles and preferences
2. **lesson_progress** - Lesson completion tracking
3. **exercise_attempts** - All exercise attempts
4. **exercise_completion** - Best scores per exercise
5. **study_sessions** - Daily session tracking
6. **achievements** - Badge system
7. **bookmarks** - Saved lessons/notes
8. **learning_path_progress** - Path-specific progress

### Course Model Features

**Loaded from course.json:**
- 4 Parts with 30 Lessons
- 18 Exercises (525 points)
- 4 Learning Paths
- Reference materials
- Worked examples
- Tags and metadata

**Navigation Methods:**
- `get_lesson(id)` - Fast O(1) lookup
- `get_next_lesson(id)` - Sequential navigation
- `get_prev_lesson(id)` - Sequential navigation
- `get_lesson_by_index(i)` - Access by position (0-29)
- `search_lessons(query)` - Search by title
- `get_lessons_for_path(path_id)` - Filter by learning path
- `get_lessons_by_tag(tag)` - Filter by tag

### Testing the Setup

**To test current progress:**
```batch
cd C:\git\spark-lesson
run.bat
```

**Expected Behavior:**
1. Creates virtual environment (first run)
2. Installs PyQt5 and dependencies
3. Connects to SQLite database (~/.tesla_spark_course/progress.db)
4. Loads course.json (30 lessons, 4 parts)
5. Validates lesson files exist
6. Shows success dialog with course info

**Current Output:**
```
Tesla Coil Spark Physics Course v1.0.0
[*] Initializing database...
[OK] Database ready: C:\Users\...\progress.db
[*] Loading course structure...
[OK] Course loaded: Tesla Coil Spark Physics: Complete Course
[*] Validating lesson files...
[OK] All lesson files found
[*] Application setup complete
```

---

## Phase 2: Main Window & UI (COMPLETED)

### ✅ Completed Components

**Priority 1: Main Window Layout**
- ✅ `app/views/main_window.py` - QMainWindow with 3-panel QSplitter
- ✅ `app/views/navigation_panel.py` - Left sidebar (QTreeWidget)
- ✅ `app/views/content_viewer.py` - Center (QWebEngineView)
- ✅ `app/views/progress_panel.py` - Right sidebar (QScrollArea)
- ✅ `app/views/__init__.py` - Views package

**Priority 2: Navigation Tree** ✅
- ✅ Tree structure showing 4 parts, 30 lessons
- ✅ Status icons (✓ ⊙ ○ 🔒)
- ✅ Learning path selector dropdown
- ✅ Search functionality
- ✅ Double-click to open lessons
- ✅ Continue Learning button

**Priority 3: Content Viewer** ✅
- ✅ Markdown rendering (python-markdown + pymdownx)
- ✅ MathJax equation rendering (CDN)
- ✅ Image loading from assets/
- ✅ Custom tag parsing ({exercise:id}, {image:file})
- ✅ Styled HTML output with syntax highlighting
- ⏳ Auto-scroll restoration (placeholder)

**Priority 4: Progress Panel** ✅
- ✅ Overall progress bar
- ✅ Part-by-part progress (4 parts)
- ✅ Current lesson info
- ✅ Quick stats (points, time, streak)
- ✅ Level system display
- ✅ Exercise completion tracking

---

## Architecture Overview

```
spark-lessons/
├── run.bat                          ✅ DONE
├── requirements.txt                 ✅ DONE
├── app/
│   ├── __init__.py                  ✅ DONE
│   ├── main.py                      ✅ DONE
│   ├── config.py                    ✅ DONE
│   ├── database.py                  ✅ DONE
│   ├── models/
│   │   ├── __init__.py              ✅ DONE
│   │   ├── course_model.py          ✅ DONE
│   │   ├── progress_model.py        🔄 TODO (optional)
│   │   └── user_model.py            🔄 TODO (optional)
│   ├── views/                       ✅ DONE (all)
│   │   ├── __init__.py              ✅ DONE
│   │   ├── main_window.py           ✅ DONE
│   │   ├── navigation_panel.py      ✅ DONE
│   │   ├── content_viewer.py        ✅ DONE
│   │   └── progress_panel.py        ✅ DONE
│   ├── controllers/                 🔄 TODO (optional)
│   │   ├── navigation_controller.py
│   │   └── progress_controller.py
│   └── utils/                       🔄 TODO (optional)
│       ├── markdown_renderer.py
│       └── icon_provider.py
└── resources/
    ├── database/
    │   └── schema.sql               ✅ DONE
    ├── styles/                      🔄 TODO
    │   └── main.qss
    └── icons/                       🔄 TODO
        └── status/
```

---

## Technical Stack

**Core:**
- Python 3.8+
- PyQt5 5.15.0+
- SQLite3

**Content Rendering:**
- python-markdown 3.5.0+
- pymdown-extensions 10.5.0+ (for equations, syntax highlighting)
- PyQt5-WebEngine (for rendering HTML/MathJax)

**Data:**
- PyYAML 6.0.1+ (for exercises)
- JSON (for course structure)

---

## Phase 3: Enhancements & Polish (NEXT)

1. **Exercise System** (4-6 hours)
   - Create exercise YAML files
   - Exercise widget components
   - Answer validation
   - Hints system
   - Score tracking

2. **Keyboard Navigation** (2-3 hours)
   - Next/prev lesson shortcuts
   - Search hotkey
   - Quick navigation
   - Lesson completion shortcut

3. **Additional Features** (3-4 hours)
   - Bookmarking system
   - Notes editor
   - Export progress report
   - Print lesson content

4. **Polish & UX** (2-3 hours)
   - Smooth scrolling
   - Loading indicators
   - Error handling improvements
   - Tooltips and help text

**Estimated Time:** 11-16 hours for Phase 3

---

## Known Issues / Notes

1. **Lesson File Paths**: The course_model currently constructs paths by string manipulation. Works for current structure but may need refinement.

2. **Exercise Files**: Exercise YAML files don't exist yet in the exercises/ directory. Need to create them or handle gracefully.

3. **Images**: 22 images generated, 15 placeholders exist. Circuit diagrams (7) need manual creation.

4. **MathJax CDN**: Currently points to CDN. For offline use, may want to bundle MathJax locally.

5. **Single User**: Database designed for single-user desktop app. Multi-user would need authentication layer.

---

## Success Metrics for Phase 2

- ✅ Main window opens without errors
- ✅ Navigation tree shows all 30 lessons with proper structure
- ✅ Click lesson → content loads and displays
- ✅ Markdown renders correctly with MathJax
- ⏳ Images display from assets/ (when files exist)
- ✅ Progress panel shows basic stats
- ✅ Learning path filter works
- ✅ Search functionality works
- ✅ Progress tracking in database
- ✅ Auto-save every 10 seconds
- ✅ Menu bar with File/View/Help
- ✅ 3-panel splitter layout

**Phase 2 Complete!** All core UI components implemented and functional.

---

**Last Updated:** 2025-10-10
**Status:** Phase 2 complete - Full application UI working!

## Testing the Application

**To run the application:**
```batch
cd C:\git\spark-lesson\spark-lessons
run.bat
```

**Current Functionality:**
1. ✅ Browse all 30 lessons in tree structure
2. ✅ Double-click lessons to view content
3. ✅ Markdown content with equations renders properly
4. ✅ Progress tracking automatically saves
5. ✅ Filter by learning path
6. ✅ Search lessons by title
7. ✅ View overall and per-part progress
8. ✅ Points and level system
9. ✅ Study statistics (time, streak, exercises)

**Known Limitations:**
- Exercise widgets not yet interactive (placeholders only)
- Scroll position restoration not implemented
- Some lesson images need to be created
- No keyboard shortcuts yet