beginnings of GUI, continue on Monday

.memory-bank/activeContext.md

@@ -1,96 +1,205 @@
-# Active Context: Current Processing Focus
-
-## Current Phase
-**Development Phase**: Building core pipeline modules (Steps 1-10)
-
-## Implementation Progress
-
-### ✅ Completed Steps (1-10) - PIPELINE COMPLETE
-- **Step 1: Configuration & Setup** - Project structure, config.yaml, requirements
-- **Step 2: Volume Discovery** - `volume_discovery.py` (7 tests passing)
-  - Supports barcode and ARK identifiers
-  - Validates sequential numbering
-  - Groups TIFFs by volume
-- **Step 3: OCR Processing** - `ocr_processor.py` (tests passing)
-  - Plain text OCR with pytesseract
-  - hOCR coordinate data generation
-  - UTF-8 encoding and control character sanitization
-- **Step 4: File Validation** - `file_validator.py` (8 tests passing)
-  - 8-digit sequential naming enforcement
-  - Triplet verification (TIFF/TXT/HTML)
-  - Dry-run mode for safe testing
-- **Step 5: YAML Generation** - `yaml_generator.py` (5 tests passing)
-  - Reads per-package metadata JSON
-  - HathiTrust-compliant YAML structure
-  - Auto-labels FRONT_COVER and BACK_COVER
-- **Step 6: MD5 Checksum Generation** - `checksum_generator.py` (14 tests passing)
-  - MD5 computation for all package files
-  - Checksum.md5 file generation (excludes self)
-  - Verification and validation capabilities
-- **Step 7: Package Assembly** - `package_assembler.py` (11 tests passing)
-  - Flat directory structure organization
-  - File copying to package directory
-  - Triplet validation (TIFF/TXT/HTML matching)
-  - Sequential numbering verification
-  - Checksum generation integration
-  - Comprehensive package validation
-- **Step 8: ZIP Archive Creation** - `zip_packager.py` (15 tests passing)
-  - Creates HathiTrust-compliant flat-structure ZIPs
-  - ZIP_DEFLATED compression
-  - Structure validation (detects subdirectories)
-  - Integrity verification with testzip()
-  - macOS metadata filtering (._files, .DS_Store)
-  - Content listing and extraction capabilities
-  - CLI interface for all operations
-- **Step 9: Quality Control & Validation** - `package_validator.py` (15 tests passing)
-  - Comprehensive HathiTrust compliance checking
-  - Naming convention validation (barcode/ARK)
-  - ZIP structure verification (flat, no subdirectories)
-  - Required files validation (meta.yml, checksum.md5)
-  - File triplet verification (TIFF/TXT/HTML matching)
-  - Sequential numbering validation (no gaps)
-  - YAML metadata validation (structure and fields)
-  - MD5 checksum verification (all files)
-  - Detailed validation reports with categorized checks
-  - CLI with verbose and JSON output modes
-
-### 🔄 In Progress
-**None currently** - Ready for Step 10 implementation
-
-### 📋 Remaining Steps (10)
-- **Step 10: Main Pipeline Orchestration**
-  - Create `main_pipeline.py`
-  - Integrate all modules (Steps 1-9)
-  - Batch processing with error recovery
-  - Processing report generation
-
-## Recent Processing Activity
-**No volumes processed yet** - Pipeline still in development phase
-
-## Next Immediate Steps
-1. Implement Step 10: Main Pipeline Orchestration
-2. Create comprehensive integration test suite
-3. Document in DEMO_step10.md
-4. Commit Steps 8 & 9 to GitHub
-5. Test end-to-end pipeline with real volumes
-
-## Current Testing Focus
-- ✅ All unit tests verified with pytest (77 passing, 1 skipped)
-- Steps 1-9 fully tested (78 tests total: 7+3+8+5+14+11+15+15)
-- Test execution time: ~0.50 seconds
-- Test file generators available for development
-- Integration testing planned after Step 10 completion
-
-## Known Issues/Decisions
-- **Metadata collection**: Using interactive JSON approach instead of static config
-- **YAML generator**: Using custom implementation instead of external HathiTrustYAMLgenerator repo
-- **Source system**: CaptureOne Cultural Heritage Edition (not physical scanner)
-- **Variable settings**: Per-package metadata collection supports different DPI/compression per volume
-- **DEMO files**: Removed from public repo, added to .gitignore for privacy
-
-## Git Repository Status
-- **Branch**: master (tracking origin/master)
-- **Last commit**: [Pending] Step 8: ZIP Archive Creation
-- **Remote**: https://github.itap.purdue.edu/schipp0/hathitrust-package-automation
-- **Total commits**: 4 (5 after Step 8 commit)
-- **Files tracked**: 25+ Python modules, tests, documentation
+# Active Context: GUI Development - Current Focus
+
+## Current Phase: Phase 2 - GUI Application Development 🔄
+
+### Previous Phase Complete: Phase 1 - Service Layer ✅
+All service layer components implemented and tested.
+
+### Recent Completion: Tasks 1-3 ✅ (October 3, 2025)
+**Task 1**: Directory structure created - Full `src/gui/` architecture
+**Task 2**: Volume discovery integrated - Input panel fully functional
+**Task 3**: MainWindow integration complete - All signal/slot connections implemented
+
+**Current State**:
+```
+GUI Application Architecture (Complete)
+├── main_window.py (540 lines) ✅ - Signal/slot integration done
+├── panels/
+│   ├── input_panel.py (274 lines) ✅ - Volume discovery working
+│   ├── metadata_panel.py ✅ - Template loading ready
+│   └── progress_panel.py ✅ - Progress tracking ready
+├── widgets/ ✅ - All reusable components created
+├── dialogs/ ✅ - Validation and error dialogs ready
+└── tests/gui/ ✅ - Test suite created
+```
+
+### Recent Completion: Task 4 - GUI Display Testing ✅ (October 3, 2025)
+
+**Status**: Complete - GUI fully functional with WSLg/Wayland
+
+**Solution**: WSLg with Wayland platform (not X11/xcb)
+```bash
+export DISPLAY=:0
+export QT_QPA_PLATFORM=wayland
+export XDG_RUNTIME_DIR=/mnt/wslg/runtime-dir
+export WAYLAND_DISPLAY=wayland-0
+./bin/python3 -m src.gui.main_window
+```
+
+**Verified Working**:
+- ✅ GUI window opens without crashes
+- ✅ All three panels visible and styled correctly
+- ✅ Folder selection triggers volume discovery
+- ✅ Volume table populates with correct data
+- ✅ Metadata panel shows loaded Phase One template
+- ✅ Process button enables when ready
+- ✅ Real-time progress updates during processing
+- ✅ Validation dialog shows results correctly
+
+**Environment**: WSL2 Ubuntu 22.04 with WSLg (Wayland compositor)
+
+### Current Focus: Phase 2 Week 3 - Tasks 5-6 ⏳
+
+**Next Priorities**:
+
+**Task 5: Styling & Polish** (Starting Monday, Oct 7)
+- Enhance `src/gui/resources/styles.qss` stylesheet
+- Add color-coded validation status (green ✓, red ✗, yellow ⚠)
+- Improve table styling (zebra stripes, hover effects)
+- Polish button states and spacing
+- Add icons to buttons and dialogs
+
+**Task 6: Multi-Volume Batch Testing**
+- Create test data with 5-10 volumes
+- Test batch processing end-to-end
+- Verify progress updates for all volumes
+- Test cancellation mid-batch
+- Test error handling (one volume fails, others continue)
+- Measure performance benchmarks
+
+**Architecture**:
+```
+┌─────────────────────────────────────────────┐
+│  PyQt6 GUI Application (Phase 2 - NOW)     │
+│  ├── MainWindow - Three-panel layout       │
+│  ├── Input Panel - Folder selection        │
+│  ├── Metadata Panel - Template forms       │
+│  └── Progress Panel - Real-time updates    │
+└────────────────┬────────────────────────────┘
+                 │ connects to
+┌────────────────▼────────────────────────────┐
+│  Service Layer (Phase 1 - COMPLETE ✅)     │
+│  ├── PipelineService                       │
+│  ├── MetadataService                       │
+│  ├── ProgressService                       │
+│  └── ValidationService                     │
+└────────────────┬────────────────────────────┘
+                 │ uses
+┌────────────────▼────────────────────────────┐
+│  Backend Modules (Phase 0 - COMPLETE ✅)   │
+│  ├── main_pipeline.py                      │
+│  ├── ocr_processor.py                      │
+│  └── [8 other modules]                     │
+└─────────────────────────────────────────────┘
+```
+
+---
+
+## Active Development Tasks (Phase 2 - Current Status)
+
+### ✅ COMPLETED: Week 1-2 Tasks (October 3, 2025)
+
+#### Task 1: Directory Structure Setup ✅
+**Status**: Complete
+**Created**: Full `src/gui/` architecture with 25+ files
+- ✅ Main modules: main_window.py (540 lines), app.py
+- ✅ Panels: input_panel.py (274 lines), metadata_panel.py, progress_panel.py
+- ✅ Widgets: folder_selector.py, volume_list.py, progress_widget.py
+- ✅ Dialogs: validation_dialog.py, error_dialog.py, settings_dialog.py
+- ✅ Resources: styles.qss (196 lines), resources.qrc, icons/
+
+#### Task 2: Volume Discovery Integration ✅
+**Status**: Complete
+**File**: `src/gui/panels/input_panel.py` (274 lines)
+**Key Features**:
+- Backend volume_discovery integration
+- Automatic discovery on folder selection
+- Table display with 4 columns (ID, Pages, Size, Status)
+- Color-coded validation (green/red)
+- Human-readable file sizes
+- Comprehensive error handling
+- Signal emission for MainWindow
+
+#### Task 3: MainWindow Integration ✅
+**Status**: Complete  
+**File**: `src/gui/main_window.py` (540 lines)
+**Key Features**:
+- Complete signal/slot architecture
+- State management (volumes, metadata, folders)
+- Service lifecycle management
+- Validation logic (_validate_ready_for_processing)
+- 10+ signal handlers for workflow
+- Automatic Phase One template loading
+- Real-time progress updates wired to services
+
+### ⏳ IN PROGRESS: Task 4 - GUI Display Testing
+
+**Status**: Ready to test, blocked by X11 setup
+**Created Files**:
+- `test_gui_display.py` - Manual testing script
+- `tests/gui/test_main_window_display.py` - pytest-qt suite (117 lines, 6 tests)
+
+**Immediate Action Required**:
+1. Configure X11 display in WSL Ubuntu
+2. Choose X11 method: WSLg, VcXsrv, or VNC
+3. Test DISPLAY with `xclock`
+4. Run manual test: `python test_gui_display.py`
+5. Run automated tests: `pytest tests/gui/`
+
+**Test Scenarios to Execute**:
+- Open MainWindow (verify no crashes)
+- Browse to test volume folder
+- Verify volume discovery (should show 1 volume, 12 pages)
+- Check metadata panel (Phase One template loaded)
+- Verify Process button enables
+- Click Process and watch progress
+- Check validation dialog
+- Verify output ZIP creation
+
+---
+
+## Current Decisions & Open Questions
+
+### Design Decisions Made
+✅ **Three-panel vertical layout** - Mirrors typical workflow (input → metadata → process)
+✅ **Template system** - Pre-configured scanner metadata for common equipment
+✅ **Real-time progress** - Don't make users guess what's happening
+✅ **Enhanced validation** - Show errors/warnings/info separately with fixes
+
+### Open Questions
+❓ **Multi-volume selection** - Process all or allow per-volume selection?
+  → Decision needed in Task 3 (Input Panel)
+
+❓ **Dark mode support** - Phase 2 or Phase 3?
+  → Recommend Phase 3 (focus on functionality first)
+
+❓ **Drag-and-drop folder selection** - In addition to browse button?
+  → Recommend yes if time permits (improves UX)
+
+❓ **Processing queue management** - Pause/resume or just cancel?
+  → Recommend just cancel for Phase 2 (pause/resume in Phase 3)
+
+---
+
+## Blockers & Dependencies
+
+### No Blockers ✅
+- ✅ Backend complete and tested
+- ✅ Service layer complete with PyQt6 integration
+- ✅ PyQt6 installed and working
+- ✅ Test data available (existing TIFF batches)
+
+### External Dependencies
+- PyQt6 6.5+ (already installed)
+- pytest-qt for GUI testing (needs installation)
+
+---
+
+## Next Immediate Actions
+
+1. **Create GUI directory structure** (`src/gui/` + subdirectories)
+2. **Implement MainWindow skeleton** (menu bar + three-panel layout)
+3. **Build Input Panel** (folder selection + volume discovery)
+4. **Test with real data** (select actual TIFF folder, verify volume detection)
+
+Once these 4 tasks are complete, we'll have a minimal working GUI that can discover volumes and display them, ready for metadata entry and processing integration.