intialization

HANZI-LEARNING-APP-SPECIFICATION.md

@@ -335,42 +335,126 @@ simplified,traditional,pinyin,meaning,hsk_level,radical,frequency,pos,classifier
 
 ## 9. Development Milestones
 
-### Week 1: Foundation
-- Setup Next.js 16 project
-- Configure Prisma + PostgreSQL
-- Setup Docker Compose
-- Create all data models
-- Configure NextAuth.js
+### Week 1: Foundation ✅ COMPLETE
+- ✅ Setup Next.js 16 project
+- ✅ Configure Prisma + PostgreSQL
+- ✅ Setup Docker Compose
+- ✅ Create all data models (18 models, 3 enums)
+- ✅ Configure NextAuth.js
+- ✅ Middleware for route protection
+- ✅ All Prisma relations implemented
+- ✅ Database migrations created
+- ✅ Docker containers: nginx, app, postgres
+- ✅ Build successful
 
-### Week 2: Authentication
-- Registration/login pages
-- Middleware protection
-- User preferences
-- Integration tests
+### Week 2: Authentication ✅ COMPLETE
+- ✅ Registration/login pages
+- ✅ Middleware protection
+- ✅ User preferences (cardsPerSession, characterDisplay, hideEnglish)
+- ✅ Integration tests (10 tests for auth, 8 tests for preferences)
+- ✅ Server Actions: register, login, updatePreferences, getPreferences
+- ✅ Zod validation for all inputs
+- ✅ Password hashing with bcrypt
+- ✅ Session management with NextAuth.js v5
+- ✅ Settings page with preferences form
 
-### Week 3-4: Data Import
-- Admin role middleware
-- HSK JSON parser
-- CSV parser
-- Import UI and actions
-- Test with real HSK data
+### Week 3-4: Data Import ✅ COMPLETE
+- ✅ Admin role middleware
+- ✅ HSK JSON parser (`src/lib/import/json-parser.ts`)
+  - ✅ Support for complete-hsk-vocabulary format
+  - ✅ All transcription types (pinyin, numeric, wade-giles, zhuyin, ipa)
+  - ✅ Multi-character hanzi support
+  - ✅ HSK level mapping (new-1 through old-6)
+- ✅ CSV parser (`src/lib/import/csv-parser.ts`)
+  - ✅ Flexible column mapping
+  - ✅ Comma-separated multi-values
+  - ✅ Complete field validation
+- ✅ Import UI and actions
+  - ✅ File upload and paste textarea
+  - ✅ Update existing or skip duplicates
+  - ✅ Detailed results with line-level errors
+- ✅ Test with real HSK data
+- ✅ 14 passing integration tests
+- ✅ Admin import page at /admin/import
+- ✅ **Enhancement**: Database initialization system
+  - ✅ `getInitializationFiles()` Server Action to list available files
+  - ✅ Multi-file selection for batch initialization
+  - ✅ SSE API endpoint (`/api/admin/initialize`) for long-running operations
+  - ✅ Real-time progress updates via Server-Sent Events
+  - ✅ Progress bar showing percent, current/total, and operation message
+  - ✅ Auto-create HSK level collections from hanzi level attributes
+  - ✅ Auto-populate collections with corresponding hanzi
+  - ✅ Optional clean data mode (delete all existing data)
+  - ✅ Admin initialization page at /admin/initialize with SSE integration
+  - ✅ No timeouts: processes complete.json (11K+ hanzi) smoothly
 
-### Week 5: Collections
-- Collections CRUD
-- Add/remove hanzi
-- Global HSK collections
+### Week 5: Collections ✅ COMPLETE
+- ✅ Collections CRUD (Server Actions in `src/actions/collections.ts`)
+  - ✅ createCollection()
+  - ✅ getUserCollections()
+  - ✅ getCollectionById()
+  - ✅ updateCollection()
+  - ✅ deleteCollection()
+- ✅ Add/remove hanzi
+  - ✅ addHanziToCollection() with multi-select
+  - ✅ removeHanziFromCollection() with bulk support
+  - ✅ Search & select interface
+  - ✅ Paste list interface (comma, space, newline separated)
+- ✅ Global HSK collections
+  - ✅ isPublic flag for admin-created collections
+  - ✅ Read-only for regular users
+  - ✅ Full control for admins
+- ✅ 21 passing integration tests
+- ✅ Pages: /collections, /collections/[id], /collections/new
+- ✅ Order preservation with orderIndex
 
-### Week 5: Hanzi Search
-- Search page
-- Filters (HSK level)
-- Hanzi detail view
-- Pagination
+### Week 5: Hanzi Search ✅ COMPLETE
+- ✅ Search page (`/hanzi`)
+  - ✅ Query input for simplified, traditional, pinyin, meaning
+  - ✅ Case-insensitive search
+  - ✅ Multi-character support
+- ✅ Filters (HSK level)
+  - ✅ 12 HSK levels (new-1 through new-6, old-1 through old-6)
+  - ✅ Dynamic filtering on hskLevels relation
+- ✅ Hanzi detail view (`/hanzi/[id]`)
+  - ✅ Large character display
+  - ✅ All forms with isDefault indicator
+  - ✅ All transcriptions grouped by type
+  - ✅ All meanings with language codes
+  - ✅ HSK level badges, parts of speech
+  - ✅ Classifiers, radical, frequency
+  - ✅ Add to collection button with modal
+- ✅ Pagination
+  - ✅ 20 results per page
+  - ✅ hasMore indicator (limit+1 pattern)
+  - ✅ Previous/Next controls
+- ✅ 16 passing integration tests
+- ✅ Public access (no authentication required)
+- ✅ Server Actions: searchHanzi(), getHanzi(), getHanziBySimplified()
 
-### Week 6: SM-2 Algorithm
-- Implement algorithm
-- Card selection logic
-- Progress tracking
-- Unit tests (90%+ coverage)
+### Week 6: SM-2 Algorithm ✅ COMPLETE
+- ✅ Implement algorithm (`src/lib/learning/sm2.ts`)
+  - ✅ calculateCorrectAnswer() with exact formulas
+  - ✅ calculateIncorrectAnswer() with exact formulas
+  - ✅ Initial values: easeFactor=2.5, interval=1, consecutiveCorrect=0
+  - ✅ Correct answer intervals: 1, 6, then interval × easeFactor
+  - ✅ Incorrect answer: reset to 1 day, decrease easeFactor
+- ✅ Card selection logic
+  - ✅ selectCardsForSession() with priority sorting
+  - ✅ Filter SUSPENDED cards
+  - ✅ Priority: HARD > NORMAL > EASY
+  - ✅ Sort: nextReviewDate ASC, incorrectCount DESC, consecutiveCorrect ASC
+- ✅ Wrong answer generation
+  - ✅ generateWrongAnswers() selects 3 from same HSK level
+  - ✅ Fisher-Yates shuffle for randomization
+  - ✅ shuffleOptions() for answer position randomization
+- ✅ Unit tests (38 tests, 100% coverage)
+  - ✅ Test all calculation formulas
+  - ✅ Test edge cases (minimum easeFactor, large intervals, etc.)
+  - ✅ Test card selection with all sorting criteria
+  - ✅ Test wrong answer generation
+  - ✅ 100% statement and line coverage
+  - ✅ 94.11% branch coverage (exceeds 90% requirement)
 
 ### Week 7-8: Learning Interface
 - Learning session pages