package balance

import (
	"context"
	"errors"
	"io"
	"path/filepath"
	"testing"

	_ "github.com/gogf/gf/contrib/drivers/sqlite/v2"
	"github.com/gogf/gf/v2/database/gdb"
	"github.com/gogf/gf/v2/frame/g"
)

type tradeQueryerStub struct {
	result *TradeQueryResult
	err    error
	calls  int
}

func (s *tradeQueryerStub) Query(_ context.Context, _ string) (*TradeQueryResult, error) {
	s.calls++
	return s.result, s.err
}

func TestCheckRechargeTimeout(t *testing.T) {
	g.Log().SetWriter(io.Discard)
	ctx := context.Background()
	if err := gdb.SetConfig(gdb.Config{
		"default": gdb.ConfigGroup{{Type: "sqlite", Name: filepath.Join(t.TempDir(), "balance.db")}},
	}); err != nil {
		t.Fatalf("configure test database: %v", err)
	}
	defer g.DB().Close(ctx)
	createBalanceTables(t, ctx)

	t.Run("paid recharge is credited exactly once", func(t *testing.T) {
		insertRechargeDetail(t, ctx, "BAL-PAID", 10)
		insertAgentBalance(t, ctx, 11, "tenant-1", 5)
		queryer := &tradeQueryerStub{result: &TradeQueryResult{TradeStatus: "TRADE_SUCCESS", TotalAmount: "10.00", TradeNo: "ALI-1"}}
		service := NewWithQuery(queryer)

		if err := service.CheckRechargeTimeout(ctx, "BAL-PAID"); err != nil {
			t.Fatalf("first check failed: %v", err)
		}
		if status := rechargeStatus(t, ctx, "BAL-PAID"); status != rechargeStatusPaid {
			t.Fatalf("expected paid status, got %d", status)
		}
		if balance := agentBalanceValue(t, ctx, 11, "tenant-1"); balance != 15 {
			t.Fatalf("expected balance 15, got %v", balance)
		}
		if err := service.CheckRechargeTimeout(ctx, "BAL-PAID"); err != nil {
			t.Fatalf("duplicate check failed: %v", err)
		}
		if queryer.calls != 1 {
			t.Fatalf("expected one Alipay query, got %d", queryer.calls)
		}
		if balance := agentBalanceValue(t, ctx, 11, "tenant-1"); balance != 15 {
			t.Fatalf("duplicate message changed balance to %v", balance)
		}
	})

	t.Run("unpaid recharge is expired", func(t *testing.T) {
		insertRechargeDetail(t, ctx, "BAL-EXPIRED", 10)
		service := NewWithQuery(&tradeQueryerStub{result: &TradeQueryResult{TradeStatus: "WAIT_BUYER_PAY"}})
		if err := service.CheckRechargeTimeout(ctx, "BAL-EXPIRED"); err != nil {
			t.Fatalf("timeout check failed: %v", err)
		}
		if status := rechargeStatus(t, ctx, "BAL-EXPIRED"); status != rechargeStatusExpired {
			t.Fatalf("expected expired status, got %d", status)
		}
	})

	t.Run("missing recharge is ignored", func(t *testing.T) {
		queryer := &tradeQueryerStub{err: errors.New("must not be called")}
		if err := NewWithQuery(queryer).CheckRechargeTimeout(ctx, "BAL-MISSING"); err != nil {
			t.Fatalf("missing recharge returned error: %v", err)
		}
		if queryer.calls != 0 {
			t.Fatalf("missing recharge queried Alipay %d times", queryer.calls)
		}
	})

	t.Run("amount mismatch returns an error without crediting", func(t *testing.T) {
		insertRechargeDetail(t, ctx, "BAL-MISMATCH", 10)
		insertAgentBalance(t, ctx, 11, "tenant-1", 15)
		service := NewWithQuery(&tradeQueryerStub{result: &TradeQueryResult{TradeStatus: "TRADE_SUCCESS", TotalAmount: "9.00"}})
		if err := service.CheckRechargeTimeout(ctx, "BAL-MISMATCH"); err == nil {
			t.Fatal("expected amount mismatch error")
		}
		if status := rechargeStatus(t, ctx, "BAL-MISMATCH"); status != rechargeStatusPending {
			t.Fatalf("mismatch changed status to %d", status)
		}
		if balance := agentBalanceValue(t, ctx, 11, "tenant-1"); balance != 15 {
			t.Fatalf("mismatch changed balance to %v", balance)
		}
	})

	t.Run("Alipay failure is returned for delayed retry", func(t *testing.T) {
		insertRechargeDetail(t, ctx, "BAL-RETRY", 10)
		service := NewWithQuery(&tradeQueryerStub{err: errors.New("Alipay unavailable")})
		if err := service.CheckRechargeTimeout(ctx, "BAL-RETRY"); err == nil {
			t.Fatal("expected query error")
		}
		if status := rechargeStatus(t, ctx, "BAL-RETRY"); status != rechargeStatusPending {
			t.Fatalf("retryable failure changed status to %d", status)
		}
	})
}

func createBalanceTables(t *testing.T, ctx context.Context) {
	t.Helper()
	statements := []string{
		`CREATE TABLE t_balance_detail (
			id INTEGER PRIMARY KEY AUTOINCREMENT,
			dept_id INTEGER NOT NULL,
			transaction_status INTEGER NOT NULL,
			transaction_channel INTEGER NOT NULL,
			amount REAL NOT NULL,
			order_sn TEXT NOT NULL,
			tenant_id TEXT NOT NULL,
			created_dept INTEGER NOT NULL,
			created_by INTEGER NOT NULL,
			transaction_time DATETIME,
			before_balance REAL,
			balance_after REAL,
			channel_serial_no TEXT,
			remark TEXT,
			updated_by INTEGER,
			updated_at DATETIME
		)`,
		`CREATE TABLE t_agent_balance (
			id INTEGER PRIMARY KEY AUTOINCREMENT,
			dept_id INTEGER NOT NULL,
			balance REAL NOT NULL,
			withdraw_amount REAL,
			withdraw_amount_status INTEGER,
			invoice_amount REAL,
			can_invoice_amount REAL,
			credit_limit REAL,
			used_credit REAL,
			pending_repayment REAL,
			status INTEGER,
			tenant_id TEXT NOT NULL,
			created_dept INTEGER,
			created_by INTEGER,
			created_at DATETIME,
			updated_by INTEGER,
			updated_at DATETIME
		)`,
	}
	for _, statement := range statements {
		if _, err := g.DB().Exec(ctx, statement); err != nil {
			t.Fatalf("create table: %v", err)
		}
	}
}

func insertRechargeDetail(t *testing.T, ctx context.Context, orderSN string, amount float64) {
	t.Helper()
	if _, err := g.DB().Model("t_balance_detail").Ctx(ctx).Data(g.Map{
		"dept_id":             11,
		"transaction_status":  rechargeStatusPending,
		"transaction_channel": rechargeChannelAlipay,
		"amount":              amount,
		"order_sn":            orderSN,
		"tenant_id":           "tenant-1",
		"created_dept":        11,
		"created_by":          7,
	}).Insert(); err != nil {
		t.Fatalf("insert recharge detail: %v", err)
	}
}

func insertAgentBalance(t *testing.T, ctx context.Context, deptID int64, tenantID string, balance float64) {
	t.Helper()
	if _, err := g.DB().Model("t_agent_balance").Ctx(ctx).Data(g.Map{"dept_id": deptID, "tenant_id": tenantID, "balance": balance}).Insert(); err != nil {
		t.Fatalf("insert agent balance: %v", err)
	}
}

func rechargeStatus(t *testing.T, ctx context.Context, orderSN string) int {
	t.Helper()
	value, err := g.DB().Model("t_balance_detail").Ctx(ctx).Where("order_sn", orderSN).Value("transaction_status")
	if err != nil {
		t.Fatalf("get recharge status: %v", err)
	}
	return value.Int()
}

func agentBalanceValue(t *testing.T, ctx context.Context, deptID int64, tenantID string) float64 {
	t.Helper()
	value, err := g.DB().Model("t_agent_balance").Ctx(ctx).Where("dept_id", deptID).Where("tenant_id", tenantID).Value("balance")
	if err != nil {
		t.Fatalf("get agent balance: %v", err)
	}
	return value.Float64()
}