-- Wallet entry points over the existing customer-account ledger:
-- simulated recharge records and withdrawal applications awaiting review.
-- Balances themselves stay in customer_accounts; these tables are the
-- business records whose lifecycle drives ledger entries.

CREATE TYPE wallet_recharge_status AS ENUM ('credited', 'failed');

CREATE TABLE wallet_recharges (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id UUID NOT NULL REFERENCES users (id) ON DELETE CASCADE,
    currency CHAR(3) NOT NULL REFERENCES currencies (code),
    amount_minor BIGINT NOT NULL CHECK (amount_minor > 0),
    status wallet_recharge_status NOT NULL DEFAULT 'credited',
    created_at TIMESTAMPTZ NOT NULL DEFAULT now()
);

CREATE INDEX wallet_recharges_user_idx
    ON wallet_recharges (user_id, created_at DESC);

CREATE TYPE wallet_withdrawal_status AS ENUM ('pending', 'approved', 'rejected');

CREATE TABLE wallet_withdrawals (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id UUID NOT NULL REFERENCES users (id) ON DELETE CASCADE,
    currency CHAR(3) NOT NULL REFERENCES currencies (code),
    amount_minor BIGINT NOT NULL CHECK (amount_minor > 0),
    -- Free-form payout destination captured at application time.
    account_details JSONB NOT NULL DEFAULT '{}'::jsonb,
    status wallet_withdrawal_status NOT NULL DEFAULT 'pending',
    reviewed_by UUID REFERENCES users (id),
    reviewed_at TIMESTAMPTZ,
    review_note TEXT,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    -- A reviewed row always records who and when; a pending row never does.
    CONSTRAINT wallet_withdrawals_review_consistent CHECK (
        (status = 'pending' AND reviewed_by IS NULL AND reviewed_at IS NULL)
        OR (status <> 'pending' AND reviewed_by IS NOT NULL AND reviewed_at IS NOT NULL)
    )
);

CREATE INDEX wallet_withdrawals_user_idx
    ON wallet_withdrawals (user_id, created_at DESC);
CREATE INDEX wallet_withdrawals_status_idx
    ON wallet_withdrawals (status, created_at DESC);