CREATE TABLE IF NOT EXISTS wallets (
    id VARCHAR(64) PRIMARY KEY,
    user_id VARCHAR(64),
    api_key_id VARCHAR(64),
    balance DOUBLE NOT NULL DEFAULT 0,
    gift_balance DOUBLE NOT NULL DEFAULT 0,
    limit_mode VARCHAR(64) NOT NULL DEFAULT 'finite',
    currency VARCHAR(16) NOT NULL DEFAULT 'USD',
    status VARCHAR(64) NOT NULL DEFAULT 'active',
    total_recharged DOUBLE NOT NULL DEFAULT 0,
    total_consumed DOUBLE NOT NULL DEFAULT 0,
    total_refunded DOUBLE NOT NULL DEFAULT 0,
    total_adjusted DOUBLE NOT NULL DEFAULT 0,
    created_at BIGINT NOT NULL,
    updated_at BIGINT NOT NULL,
    UNIQUE KEY wallets_user_id_key (user_id),
    UNIQUE KEY wallets_api_key_id_key (api_key_id),
    KEY wallets_api_key_id_idx (api_key_id),
    KEY wallets_user_id_idx (user_id)
);

CREATE TABLE IF NOT EXISTS wallet_transactions (
    id VARCHAR(64) PRIMARY KEY,
    wallet_id VARCHAR(64) NOT NULL,
    category VARCHAR(64) NOT NULL,
    reason_code VARCHAR(64) NOT NULL,
    amount DOUBLE NOT NULL,
    balance_before DOUBLE NOT NULL,
    balance_after DOUBLE NOT NULL,
    recharge_balance_before DOUBLE NOT NULL,
    recharge_balance_after DOUBLE NOT NULL,
    gift_balance_before DOUBLE NOT NULL,
    gift_balance_after DOUBLE NOT NULL,
    link_type VARCHAR(64),
    link_id VARCHAR(128),
    operator_id VARCHAR(64),
    description TEXT,
    created_at BIGINT NOT NULL,
    KEY idx_wallet_tx_wallet_created (wallet_id, created_at),
    KEY idx_wallet_tx_category_created (category, created_at),
    KEY idx_wallet_tx_reason_created (reason_code, created_at),
    KEY idx_wallet_tx_link (link_type, link_id),
    KEY ix_wallet_transactions_operator_id (operator_id)
);

CREATE TABLE IF NOT EXISTS wallet_daily_usage_ledgers (
    id VARCHAR(64) PRIMARY KEY,
    wallet_id VARCHAR(64) NOT NULL,
    billing_date VARCHAR(16) NOT NULL,
    billing_timezone VARCHAR(64) NOT NULL,
    total_cost_usd DOUBLE NOT NULL DEFAULT 0,
    total_requests BIGINT NOT NULL DEFAULT 0,
    input_tokens BIGINT NOT NULL DEFAULT 0,
    output_tokens BIGINT NOT NULL DEFAULT 0,
    cache_creation_tokens BIGINT NOT NULL DEFAULT 0,
    cache_read_tokens BIGINT NOT NULL DEFAULT 0,
    first_finalized_at BIGINT,
    last_finalized_at BIGINT,
    aggregated_at BIGINT NOT NULL,
    created_at BIGINT NOT NULL,
    updated_at BIGINT NOT NULL,
    KEY idx_wallet_daily_usage_wallet_date (wallet_id, billing_timezone, billing_date)
);

CREATE TABLE IF NOT EXISTS payment_orders (
    id VARCHAR(64) PRIMARY KEY,
    order_no VARCHAR(128) NOT NULL,
    wallet_id VARCHAR(64) NOT NULL,
    user_id VARCHAR(64),
    amount_usd DOUBLE NOT NULL,
    pay_amount DOUBLE,
    pay_currency VARCHAR(16),
    exchange_rate DOUBLE,
    refunded_amount_usd DOUBLE NOT NULL DEFAULT 0,
    refundable_amount_usd DOUBLE NOT NULL DEFAULT 0,
    payment_method VARCHAR(64) NOT NULL,
    gateway_order_id VARCHAR(128),
    gateway_response TEXT,
    status VARCHAR(64) NOT NULL DEFAULT 'pending',
    created_at BIGINT NOT NULL,
    paid_at BIGINT,
    credited_at BIGINT,
    expires_at BIGINT,
    UNIQUE KEY uq_payment_orders_order_no (order_no),
    KEY idx_payment_orders_wallet_created (wallet_id, created_at),
    KEY idx_payment_orders_user_created (user_id, created_at),
    KEY idx_payment_orders_status (status),
    KEY idx_payment_orders_gateway_order_id (gateway_order_id)
);

CREATE TABLE IF NOT EXISTS payment_callbacks (
    id VARCHAR(64) PRIMARY KEY,
    payment_order_id VARCHAR(64),
    payment_method VARCHAR(64) NOT NULL,
    callback_key VARCHAR(128) NOT NULL,
    order_no VARCHAR(128),
    gateway_order_id VARCHAR(128),
    payload_hash VARCHAR(128),
    signature_valid TINYINT(1) NOT NULL DEFAULT 0,
    status VARCHAR(64) NOT NULL DEFAULT 'received',
    payload TEXT,
    error_message TEXT,
    created_at BIGINT NOT NULL,
    processed_at BIGINT,
    UNIQUE KEY uq_payment_callbacks_callback_key (callback_key),
    KEY idx_payment_callbacks_order (order_no),
    KEY idx_payment_callbacks_gateway_order (gateway_order_id),
    KEY idx_payment_callbacks_created (created_at),
    KEY ix_payment_callbacks_payment_order_id (payment_order_id)
);

CREATE TABLE IF NOT EXISTS refund_requests (
    id VARCHAR(64) PRIMARY KEY,
    refund_no VARCHAR(128) NOT NULL,
    wallet_id VARCHAR(64) NOT NULL,
    user_id VARCHAR(64),
    payment_order_id VARCHAR(64),
    source_type VARCHAR(64) NOT NULL,
    source_id VARCHAR(128),
    refund_mode VARCHAR(64) NOT NULL,
    amount_usd DOUBLE NOT NULL,
    status VARCHAR(64) NOT NULL DEFAULT 'pending_approval',
    reason TEXT,
    requested_by VARCHAR(64),
    approved_by VARCHAR(64),
    processed_by VARCHAR(64),
    gateway_refund_id VARCHAR(128),
    payout_method VARCHAR(64),
    payout_reference VARCHAR(255),
    payout_proof TEXT,
    failure_reason TEXT,
    idempotency_key VARCHAR(128),
    created_at BIGINT NOT NULL,
    updated_at BIGINT NOT NULL,
    processed_at BIGINT,
    completed_at BIGINT,
    UNIQUE KEY uq_refund_requests_refund_no (refund_no),
    UNIQUE KEY uq_refund_requests_idempotency_key (idempotency_key),
    KEY idx_refund_wallet_created (wallet_id, created_at),
    KEY idx_refund_user_created (user_id, created_at),
    KEY idx_refund_status (status),
    KEY ix_refund_requests_payment_order_id (payment_order_id),
    KEY ix_refund_requests_requested_by (requested_by),
    KEY ix_refund_requests_approved_by (approved_by),
    KEY ix_refund_requests_processed_by (processed_by)
);

CREATE TABLE IF NOT EXISTS redeem_code_batches (
    id VARCHAR(64) PRIMARY KEY,
    name VARCHAR(255) NOT NULL,
    amount_usd DOUBLE NOT NULL,
    currency VARCHAR(16) NOT NULL DEFAULT 'USD',
    balance_bucket VARCHAR(64) NOT NULL DEFAULT 'gift',
    total_count INT NOT NULL,
    status VARCHAR(64) NOT NULL DEFAULT 'active',
    description TEXT,
    created_by VARCHAR(64),
    expires_at BIGINT,
    created_at BIGINT NOT NULL,
    updated_at BIGINT NOT NULL,
    KEY idx_redeem_code_batches_status (status, created_at)
);

CREATE TABLE IF NOT EXISTS redeem_codes (
    id VARCHAR(64) PRIMARY KEY,
    batch_id VARCHAR(64) NOT NULL,
    code_hash VARCHAR(128) NOT NULL,
    code_prefix VARCHAR(16) NOT NULL,
    code_suffix VARCHAR(16) NOT NULL,
    status VARCHAR(64) NOT NULL DEFAULT 'active',
    redeemed_by_user_id VARCHAR(64),
    redeemed_wallet_id VARCHAR(64),
    redeemed_payment_order_id VARCHAR(64),
    redeemed_at BIGINT,
    disabled_by VARCHAR(64),
    created_at BIGINT NOT NULL,
    updated_at BIGINT NOT NULL,
    UNIQUE KEY uq_redeem_codes_code_hash (code_hash),
    KEY idx_redeem_codes_batch_created (batch_id, created_at),
    KEY idx_redeem_codes_status (status, updated_at),
    KEY idx_redeem_codes_redeemed_user (redeemed_by_user_id, redeemed_at),
    KEY idx_redeem_codes_redeemed_order (redeemed_payment_order_id)
);