package processor

import (
	"context"
	"testing"
	"time"

	"apskel-pos-be/internal/entities"
	"apskel-pos-be/internal/models"

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

type expenseRepositoryCaptureStub struct {
	createdExpense *entities.Expense
	createdItems   []*entities.ExpenseItem
	analytics      *entities.ExpenseAnalytics
}

func (s *expenseRepositoryCaptureStub) Create(_ context.Context, expense *entities.Expense) error {
	if expense.ID == uuid.Nil {
		expense.ID = uuid.New()
	}
	s.createdExpense = expense
	return nil
}

func (s *expenseRepositoryCaptureStub) GetByID(context.Context, uuid.UUID) (*entities.Expense, error) {
	if s.createdExpense == nil {
		return nil, nil
	}
	items := make([]entities.ExpenseItem, len(s.createdItems))
	for i, item := range s.createdItems {
		items[i] = *item
	}
	s.createdExpense.Items = items
	return s.createdExpense, nil
}

func (*expenseRepositoryCaptureStub) GetByIDAndOrganizationID(context.Context, uuid.UUID, uuid.UUID) (*entities.Expense, error) {
	return nil, nil
}
func (*expenseRepositoryCaptureStub) Update(context.Context, *entities.Expense) error { return nil }
func (*expenseRepositoryCaptureStub) Delete(context.Context, uuid.UUID) error         { return nil }
func (*expenseRepositoryCaptureStub) List(context.Context, uuid.UUID, map[string]interface{}, int, int) ([]*entities.Expense, int64, error) {
	return nil, 0, nil
}
func (s *expenseRepositoryCaptureStub) GetAnalytics(context.Context, uuid.UUID, *uuid.UUID, time.Time, time.Time, string) (*entities.ExpenseAnalytics, error) {
	return s.analytics, nil
}
func (s *expenseRepositoryCaptureStub) CreateItem(_ context.Context, item *entities.ExpenseItem) error {
	if item.ID == uuid.Nil {
		item.ID = uuid.New()
	}
	s.createdItems = append(s.createdItems, item)
	return nil
}
func (*expenseRepositoryCaptureStub) DeleteItemsByExpenseID(context.Context, uuid.UUID) error {
	return nil
}

func TestExpenseProcessorCreatePersistsItemName(t *testing.T) {
	repo := &expenseRepositoryCaptureStub{}
	p := NewExpenseProcessorImpl(repo)
	chartOfAccountID := uuid.New()

	resp, err := p.CreateExpense(context.Background(), uuid.New(), &models.CreateExpenseRequest{
		Receiver:        "Cashier",
		TransactionDate: "2026-05-29",
		CodeNumber:      "EXP-001",
		OutletID:        uuid.NewString(),
		Total:           10000,
		Items: []models.CreateExpenseItemRequest{
			{
				ChartOfAccountID: chartOfAccountID.String(),
				Item:             "Cleaning supplies",
				Amount:           10000,
			},
		},
	})

	require.NoError(t, err)
	require.NotNil(t, resp)
	require.Len(t, repo.createdItems, 1)
	require.Equal(t, "Cleaning supplies", repo.createdItems[0].Item)
	require.Len(t, resp.Items, 1)
	require.Equal(t, "Cleaning supplies", resp.Items[0].Item)
}

func TestExpenseProcessorCreateDefaultsStatusToDraft(t *testing.T) {
	repo := &expenseRepositoryCaptureStub{}
	p := NewExpenseProcessorImpl(repo)

	resp, err := p.CreateExpense(context.Background(), uuid.New(), &models.CreateExpenseRequest{
		Receiver:        "Cashier",
		TransactionDate: "2026-05-29",
		CodeNumber:      "EXP-001",
		OutletID:        uuid.NewString(),
		Total:           10000,
		Items: []models.CreateExpenseItemRequest{
			{
				ChartOfAccountID: uuid.NewString(),
				Item:             "Cleaning supplies",
				Amount:           10000,
			},
		},
	})

	require.NoError(t, err)
	require.NotNil(t, resp)
	require.Equal(t, "draft", repo.createdExpense.Status)
	require.Equal(t, "draft", resp.Status)
}

func TestExpenseProcessorCreatePersistsProvidedStatus(t *testing.T) {
	repo := &expenseRepositoryCaptureStub{}
	p := NewExpenseProcessorImpl(repo)
	status := "approved"

	resp, err := p.CreateExpense(context.Background(), uuid.New(), &models.CreateExpenseRequest{
		Receiver:        "Cashier",
		TransactionDate: "2026-05-29",
		CodeNumber:      "EXP-001",
		OutletID:        uuid.NewString(),
		Status:          &status,
		Total:           10000,
		Items: []models.CreateExpenseItemRequest{
			{
				ChartOfAccountID: uuid.NewString(),
				Item:             "Cleaning supplies",
				Amount:           10000,
			},
		},
	})

	require.NoError(t, err)
	require.NotNil(t, resp)
	require.Equal(t, "approved", repo.createdExpense.Status)
	require.Equal(t, "approved", resp.Status)
}

func TestExpenseProcessorGetExpenseAnalyticsDefaultsGroupByAndMapsResponse(t *testing.T) {
	coaID := uuid.New()
	outletID := uuid.New()
	now := time.Date(2026, 5, 1, 0, 0, 0, 0, time.UTC)
	repo := &expenseRepositoryCaptureStub{
		analytics: &entities.ExpenseAnalytics{
			Summary: entities.ExpenseAnalyticsSummary{
				TotalExpenses:       100000,
				TotalExpenseCount:   2,
				TotalTax:            10000,
				AverageExpenseValue: 50000,
				TotalCategories:     1,
				TotalItems:          2,
			},
			Data: []entities.ExpenseAnalyticsData{
				{
					Date:         now,
					Expenses:     100000,
					ExpenseCount: 2,
					Tax:          10000,
					Items:        2,
					Categories:   1,
				},
			},
			CategoryData: []entities.ExpenseAnalyticsCategoryData{
				{
					ChartOfAccountID:   coaID,
					ChartOfAccountName: "Operational",
					TotalAmount:        100000,
					ExpenseCount:       2,
					ItemCount:          2,
				},
			},
			ItemData: []entities.ExpenseAnalyticsItemData{
				{
					Item:         "Cleaning supplies",
					TotalAmount:  100000,
					ExpenseCount: 2,
					ItemCount:    2,
				},
			},
		},
	}
	p := NewExpenseProcessorImpl(repo)

	resp, err := p.GetExpenseAnalytics(context.Background(), &models.ExpenseAnalyticsRequest{
		OrganizationID: uuid.New(),
		OutletID:       &outletID,
		DateFrom:       now,
		DateTo:         now,
	})

	require.NoError(t, err)
	require.NotNil(t, resp)
	require.Equal(t, "day", resp.GroupBy)
	require.Equal(t, &outletID, resp.OutletID)
	require.Equal(t, float64(100000), resp.Summary.TotalExpenses)
	require.Len(t, resp.Data, 1)
	require.Equal(t, int64(2), resp.Data[0].ExpenseCount)
	require.Len(t, resp.CategoryData, 1)
	require.Equal(t, coaID, resp.CategoryData[0].ChartOfAccountID)
	require.Len(t, resp.ItemData, 1)
	require.Equal(t, "Cleaning supplies", resp.ItemData[0].Item)
}