-- CreateTable
CREATE TABLE "users" (
    "id" TEXT NOT NULL PRIMARY KEY,
    "email" TEXT NOT NULL,
    "password_hash" TEXT,
    "created_at" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP
);

-- CreateTable
CREATE TABLE "user_states" (
    "id" TEXT NOT NULL PRIMARY KEY,
    "user_id" TEXT NOT NULL,
    "attention_level" INTEGER NOT NULL DEFAULT 50,
    "emotion_stability" INTEGER NOT NULL DEFAULT 50,
    "stress_level" INTEGER NOT NULL DEFAULT 50,
    "practice_stage" INTEGER NOT NULL DEFAULT 0,
    "consistency_score" INTEGER NOT NULL DEFAULT 0,
    "streak_days" INTEGER NOT NULL DEFAULT 0,
    "total_sessions_completed" INTEGER NOT NULL DEFAULT 0,
    "onboarding_completed" BOOLEAN NOT NULL DEFAULT false,
    "onboarding_variant" TEXT,
    "timezone" TEXT NOT NULL DEFAULT 'Asia/Shanghai',
    "last_session_date" DATETIME,
    "updated_at" DATETIME NOT NULL,
    CONSTRAINT "user_states_user_id_fkey" FOREIGN KEY ("user_id") REFERENCES "users" ("id") ON DELETE CASCADE ON UPDATE CASCADE
);

-- CreateTable
CREATE TABLE "analytics_events" (
    "id" TEXT NOT NULL PRIMARY KEY,
    "user_id" TEXT NOT NULL,
    "event" TEXT NOT NULL,
    "metadata" TEXT NOT NULL DEFAULT '{}',
    "created_at" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP
);

-- CreateTable
CREATE TABLE "sessions" (
    "id" TEXT NOT NULL PRIMARY KEY,
    "user_id" TEXT NOT NULL,
    "task_type" TEXT NOT NULL,
    "task_description" TEXT NOT NULL,
    "duration_seconds" INTEGER NOT NULL DEFAULT 300,
    "completed" BOOLEAN NOT NULL DEFAULT false,
    "focus_score" INTEGER,
    "emotion_score" INTEGER,
    "notes" TEXT,
    "created_at" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
    CONSTRAINT "sessions_user_id_fkey" FOREIGN KEY ("user_id") REFERENCES "users" ("id") ON DELETE CASCADE ON UPDATE CASCADE
);

-- CreateTable
CREATE TABLE "tasks" (
    "id" TEXT NOT NULL PRIMARY KEY,
    "user_id" TEXT NOT NULL,
    "type" TEXT NOT NULL,
    "difficulty" INTEGER NOT NULL DEFAULT 1,
    "duration" INTEGER NOT NULL DEFAULT 5,
    "description" TEXT NOT NULL,
    "reason_json" TEXT NOT NULL DEFAULT '{}',
    "status" TEXT NOT NULL DEFAULT 'pending',
    "created_at" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
    CONSTRAINT "tasks_user_id_fkey" FOREIGN KEY ("user_id") REFERENCES "users" ("id") ON DELETE CASCADE ON UPDATE CASCADE
);

-- CreateTable
CREATE TABLE "reward_events" (
    "id" TEXT NOT NULL PRIMARY KEY,
    "user_id" TEXT NOT NULL,
    "type" TEXT NOT NULL,
    "message" TEXT NOT NULL,
    "created_at" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
    CONSTRAINT "reward_events_user_id_fkey" FOREIGN KEY ("user_id") REFERENCES "users" ("id") ON DELETE CASCADE ON UPDATE CASCADE
);

-- CreateTable
CREATE TABLE "weekly_summaries" (
    "id" TEXT NOT NULL PRIMARY KEY,
    "user_id" TEXT NOT NULL,
    "summary" TEXT,
    "week_start" DATETIME NOT NULL,
    "created_at" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
    CONSTRAINT "weekly_summaries_user_id_fkey" FOREIGN KEY ("user_id") REFERENCES "users" ("id") ON DELETE CASCADE ON UPDATE CASCADE
);

-- CreateIndex
CREATE UNIQUE INDEX "users_email_key" ON "users"("email");

-- CreateIndex
CREATE UNIQUE INDEX "user_states_user_id_key" ON "user_states"("user_id");

-- CreateIndex
CREATE INDEX "analytics_events_user_id_created_at_idx" ON "analytics_events"("user_id", "created_at");

-- CreateIndex
CREATE INDEX "analytics_events_event_created_at_idx" ON "analytics_events"("event", "created_at");

-- CreateIndex
CREATE INDEX "sessions_user_id_created_at_idx" ON "sessions"("user_id", "created_at");

-- CreateIndex
CREATE INDEX "tasks_user_id_created_at_idx" ON "tasks"("user_id", "created_at");

-- CreateIndex
CREATE INDEX "tasks_user_id_status_idx" ON "tasks"("user_id", "status");

-- CreateIndex
CREATE INDEX "reward_events_user_id_created_at_idx" ON "reward_events"("user_id", "created_at");

-- CreateIndex
CREATE UNIQUE INDEX "weekly_summaries_user_id_key" ON "weekly_summaries"("user_id");