package common

import (
	"context"
	"errors"
	"testing"

	"github.com/perfect-panel/server/internal/model/user"
	"github.com/stretchr/testify/require"
)

func TestResolvePurchaseRoute(t *testing.T) {
	ctx := context.Background()

	t.Run("single mode disabled", func(t *testing.T) {
		called := false
		decision, err := ResolvePurchaseRoute(ctx, false, 1, 100, func(ctx context.Context, userID int64) (*user.Subscribe, error) {
			called = true
			return nil, nil
		})
		require.NoError(t, err)
		require.NotNil(t, decision)
		require.Equal(t, PurchaseRouteNewPurchase, decision.Route)
		require.Equal(t, int64(100), decision.ResolvedSubscribeID)
		require.False(t, called)
	})

	t.Run("single mode but empty user", func(t *testing.T) {
		decision, err := ResolvePurchaseRoute(ctx, true, 0, 100, nil)
		require.NoError(t, err)
		require.NotNil(t, decision)
		require.Equal(t, PurchaseRouteNewPurchase, decision.Route)
		require.Equal(t, int64(100), decision.ResolvedSubscribeID)
	})

	t.Run("single mode no anchor", func(t *testing.T) {
		decision, err := ResolvePurchaseRoute(ctx, true, 1, 100, func(ctx context.Context, userID int64) (*user.Subscribe, error) {
			return nil, nil
		})
		require.NoError(t, err)
		require.NotNil(t, decision)
		require.Equal(t, PurchaseRouteNewPurchase, decision.Route)
		require.Equal(t, int64(100), decision.ResolvedSubscribeID)
	})

	t.Run("single mode routed to renewal", func(t *testing.T) {
		decision, err := ResolvePurchaseRoute(ctx, true, 1, 100, func(ctx context.Context, userID int64) (*user.Subscribe, error) {
			return &user.Subscribe{
				Id:          11,
				SubscribeId: 100,
				OrderId:     7,
				Token:       "token",
			}, nil
		})
		require.NoError(t, err)
		require.NotNil(t, decision)
		require.Equal(t, PurchaseRoutePurchaseToRenewal, decision.Route)
		require.Equal(t, int64(100), decision.ResolvedSubscribeID)
		require.NotNil(t, decision.Anchor)
		require.Equal(t, int64(11), decision.Anchor.Id)
	})

	t.Run("single mode plan mismatch", func(t *testing.T) {
		decision, err := ResolvePurchaseRoute(ctx, true, 1, 100, func(ctx context.Context, userID int64) (*user.Subscribe, error) {
			return &user.Subscribe{
				Id:          11,
				SubscribeId: 200,
			}, nil
		})
		require.ErrorIs(t, err, ErrSingleModePlanMismatch)
		require.Nil(t, decision)
	})

	t.Run("single mode anchor query error", func(t *testing.T) {
		queryErr := errors.New("query failed")
		decision, err := ResolvePurchaseRoute(ctx, true, 1, 100, func(ctx context.Context, userID int64) (*user.Subscribe, error) {
			return nil, queryErr
		})
		require.ErrorIs(t, err, queryErr)
		require.Nil(t, decision)
	})
}