package repository

import (
	"testing"

	"github.com/google/uuid"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

// EG-501: what the voucher tables refuse (docs/rfc-enakgame.md §5.7). Needs
// TEST_DATABASE_URL; see wallet_repository_test.go.
func TestVoucherSchema_RejectsWhatTheRFCForbids(t *testing.T) {
	db := walletTestDB(t)
	org, customer := uuid.New(), uuid.New()
	require.NoError(t, db.Exec(`INSERT INTO organizations (id, name, plan_type) VALUES (?, 'voucher test', 'basic')`, org).Error)
	require.NoError(t, db.Exec(`INSERT INTO customers (id, organization_id, name) VALUES (?, ?, 'v')`, customer, org).Error)
	t.Cleanup(func() {
		db.Exec(`DELETE FROM voucher_redemptions WHERE organization_id = ?`, org)
		db.Exec(`DELETE FROM voucher_codes WHERE voucher_id IN (SELECT id FROM vouchers WHERE organization_id = ?)`, org)
		db.Exec(`DELETE FROM vouchers WHERE organization_id = ?`, org)
		db.Exec(`DELETE FROM wallet_transactions WHERE organization_id = ?`, org)
		db.Exec(`DELETE FROM customers WHERE id = ?`, customer)
		db.Exec(`DELETE FROM organizations WHERE id = ?`, org)
	})
	voucher := func(mode string, stock any, provider any) error {
		return db.Exec(`INSERT INTO vouchers (organization_id, name, voucher_type, face_value, point_cost, stock_mode, stock, provider)
			VALUES (?, 'v', 'FIXED_VALUE', 10000, 8000, ?, ?, ?)`, org, mode, stock, provider).Error
	}
	rejected := func(t *testing.T, err error, constraint string) {
		t.Helper()
		require.Error(t, err)
		assert.Contains(t, err.Error(), constraint)
	}

	rejected(t, voucher("STATIC", nil, nil), "chk_vouchers_static_stock")
	rejected(t, voucher("CODE_POOL", 5, nil), "chk_vouchers_static_stock")
	rejected(t, voucher("EXTERNAL", nil, nil), "chk_vouchers_external_provider")
	rejected(t, voucher("STATIC", 5, "acme"), "chk_vouchers_external_provider")
	rejected(t, voucher("STATIC", -1, nil), "chk_vouchers_stock")
	require.NoError(t, voucher("STATIC", 5, nil))
	require.NoError(t, voucher("EXTERNAL", nil, "acme"))

	poolID := uuid.New()
	require.NoError(t, db.Exec(`INSERT INTO vouchers (id, organization_id, name, voucher_type, face_value, point_cost, stock_mode)
		VALUES (?, ?, 'pool', 'FIXED_VALUE', 10000, 8000, 'CODE_POOL')`, poolID, org).Error)
	rejected(t, db.Exec(`INSERT INTO voucher_codes (voucher_id, code, status) VALUES (?, 'A', 'REDEEMED')`, poolID).Error, "chk_voucher_codes_redemption")
	rejected(t, db.Exec(`INSERT INTO voucher_codes (voucher_id, code, status, redemption_id) VALUES (?, 'B', 'AVAILABLE', ?)`, poolID, uuid.New()).Error, "chk_voucher_codes_redemption")
	require.NoError(t, db.Exec(`INSERT INTO voucher_codes (voucher_id, code) VALUES (?, 'C')`, poolID).Error)
	rejected(t, db.Exec(`INSERT INTO voucher_codes (voucher_id, code) VALUES (?, 'C')`, poolID).Error, "uq_voucher_codes_code")

	debit := func() uuid.UUID {
		id := uuid.New()
		require.NoError(t, db.Exec(`INSERT INTO wallet_transactions (id, organization_id, customer_id, currency, type, amount, balance_after, reference_type, reference_id, description)
			VALUES (?, ?, ?, 'POINT', 'REWARD_REDEEM', -8000, 0, 'REWARD_REDEMPTION', ?, 'x')`, id, org, customer, uuid.New()).Error)
		return id
	}
	redemption := func(key string, status string, completed bool) error {
		var completedAt any
		if completed {
			completedAt = "2026-10-07T00:00:00Z"
		}
		return db.Exec(`INSERT INTO voucher_redemptions (organization_id, customer_id, voucher_id, idempotency_key, status, face_value, point_cost, debit_transaction_id, completed_at)
			VALUES (?, ?, ?, ?, ?, 10000, 8000, ?, ?)`, org, customer, poolID, key, status, debit(), completedAt).Error
	}
	require.NoError(t, redemption("k1", "COMPLETED", true))
	rejected(t, redemption("k1", "COMPLETED", true), "uq_voucher_redemptions_key")
	rejected(t, redemption("k2", "FAILED", false), "chk_voucher_redemptions_refund")
	rejected(t, redemption("k3", "COMPLETED", false), "chk_voucher_redemptions_completed")
}