Fix D1 database configuration for Cloudflare deployment

- Update wrangler.toml with correct database ID
- Add migrations directory configuration
- Create initial schema migration file
- Apply migrations to both local and remote D1 databases
- Successfully deploy to Cloudflare Workers

Author: rgilks

migrations/0001_initial_schema.sql

@@ -0,0 +1,80 @@
+-- Initial schema migration for Comprehendo D1 database
+-- This migration creates all the required tables for the application
+
+CREATE TABLE IF NOT EXISTS quiz (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  language TEXT NOT NULL,
+  level TEXT NOT NULL,
+  content TEXT NOT NULL,
+  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+  question_language TEXT,
+  user_id INTEGER,
+  FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE SET NULL
+);
+
+CREATE TABLE IF NOT EXISTS users (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  provider_id TEXT NOT NULL,
+  provider TEXT NOT NULL,
+  name TEXT,
+  email TEXT,
+  image TEXT,
+  first_login TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+  last_login TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+  language TEXT DEFAULT 'en',
+  UNIQUE(provider_id, provider)
+);
+
+CREATE TABLE IF NOT EXISTS user_language_progress (
+  user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+  language_code TEXT NOT NULL,
+  cefr_level TEXT NOT NULL DEFAULT 'A1',
+  correct_streak INTEGER NOT NULL DEFAULT 0,
+  last_practiced TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+  PRIMARY KEY (user_id, language_code)
+);
+
+CREATE TABLE IF NOT EXISTS question_feedback (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  quiz_id INTEGER NOT NULL,
+  user_id INTEGER NOT NULL,
+  is_good INTEGER NOT NULL,
+  user_answer TEXT,
+  is_correct INTEGER,
+  submitted_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+  FOREIGN KEY (quiz_id) REFERENCES quiz (id) ON DELETE CASCADE,
+  FOREIGN KEY (user_id) REFERENCES users (id) ON DELETE CASCADE
+);
+
+CREATE TABLE IF NOT EXISTS rate_limits (
+  ip_address TEXT PRIMARY KEY,
+  request_count INTEGER NOT NULL DEFAULT 1,
+  window_start_time TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE TABLE IF NOT EXISTS translation_cache (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  source_word TEXT NOT NULL,
+  source_language TEXT NOT NULL,
+  target_language TEXT NOT NULL,
+  translated_text TEXT NOT NULL,
+  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+  UNIQUE(source_word, source_language, target_language)
+);
+
+CREATE TABLE IF NOT EXISTS ai_api_usage (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  date TEXT NOT NULL,
+  request_count INTEGER NOT NULL DEFAULT 0,
+  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+  UNIQUE(date)
+);
+
+-- Create indexes for better performance
+CREATE INDEX IF NOT EXISTS idx_quiz_created_at ON quiz(created_at DESC);
+CREATE INDEX IF NOT EXISTS idx_users_last_login ON users(last_login DESC);
+CREATE INDEX IF NOT EXISTS idx_user_language_progress_last_practiced ON user_language_progress(last_practiced DESC);
+CREATE INDEX IF NOT EXISTS idx_question_feedback_quiz_id ON question_feedback (quiz_id);
+CREATE INDEX IF NOT EXISTS idx_question_feedback_user_id ON question_feedback (user_id);
+CREATE INDEX IF NOT EXISTS idx_translation_cache_lookup ON translation_cache(source_word, source_language, target_language);
+CREATE INDEX IF NOT EXISTS idx_ai_api_usage_date ON ai_api_usage(date);

wrangler.toml

@@ -10,8 +10,8 @@ directory = ".open-next/assets"
 [[d1_databases]]
 binding = "DB"
 database_name = "comprehendo-db"
-# TODO: Replace the placeholder below with your actual database ID after creation
-database_id = "<YOUR_DATABASE_ID_HERE>"
+database_id = "a3e39277-f1f5-4c99-bee5-b41a20e01afa"
+migrations_dir = "migrations"
 
 [vars]
 NODE_ENV = "production"