CREATE TABLE IF NOT EXISTS tts_voices (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    provider_voice_id TEXT NOT NULL UNIQUE,
    name TEXT NOT NULL,
    language TEXT,
    description TEXT,
    enabled BOOLEAN NOT NULL DEFAULT true,
    supported_parameters JSONB NOT NULL DEFAULT '{}'::jsonb,
    allowed_plans JSONB NOT NULL DEFAULT '["free", "vip"]'::jsonb,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
);

CREATE TABLE IF NOT EXISTS tts_tasks (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    text TEXT NOT NULL,
    text_length INTEGER NOT NULL CHECK (text_length > 0),
    voice_id UUID REFERENCES tts_voices(id),
    provider_voice_id TEXT NOT NULL,
    parameters JSONB NOT NULL DEFAULT '{}'::jsonb,
    status TEXT NOT NULL DEFAULT 'queued' CHECK (status IN ('queued', 'running', 'succeeded', 'failed')),
    provider_task_id TEXT,
    idempotency_key TEXT NOT NULL,
    request_hash TEXT NOT NULL,
    policy_version INTEGER NOT NULL,
    quota_account_id UUID NOT NULL REFERENCES quota_accounts(id),
    reserved_amount BIGINT NOT NULL CHECK (reserved_amount >= 0),
    error_code TEXT,
    attempt_count INTEGER NOT NULL DEFAULT 0,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    started_at TIMESTAMPTZ,
    finished_at TIMESTAMPTZ,
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    UNIQUE(user_id, idempotency_key)
);
CREATE INDEX IF NOT EXISTS tts_tasks_user_created_idx ON tts_tasks(user_id, created_at DESC);
CREATE INDEX IF NOT EXISTS tts_tasks_queue_idx ON tts_tasks(status, updated_at);

CREATE TABLE IF NOT EXISTS audio_files (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    task_id UUID NOT NULL UNIQUE REFERENCES tts_tasks(id) ON DELETE CASCADE,
    owner_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    storage_key TEXT NOT NULL UNIQUE,
    mime_type TEXT NOT NULL,
    size_bytes BIGINT NOT NULL CHECK (size_bytes >= 0),
    checksum TEXT NOT NULL,
    duration_ms INTEGER,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    expires_at TIMESTAMPTZ,
    status TEXT NOT NULL DEFAULT 'available' CHECK (status IN ('available', 'expired', 'deleted'))
);

INSERT INTO tts_voices(provider_voice_id, name, description, supported_parameters, allowed_plans)
VALUES ('default', 'default', '旧 TTS 工程代码中的默认音色标识', '{"format":["wav","mp3"],"speed":{"min":0.5,"max":2}}'::jsonb, '["free","vip"]'::jsonb)
ON CONFLICT (provider_voice_id) DO NOTHING;