package validator

import (
	"testing"

	"apskel-pos-be/internal/constants"
	"apskel-pos-be/internal/contract"

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

func TestExpenseValidatorCreateRequiresItemName(t *testing.T) {
	v := NewExpenseValidator()

	req := &contract.CreateExpenseRequest{
		Receiver:        "Cashier",
		TransactionDate: "2026-05-29",
		CodeNumber:      "EXP-001",
		OutletID:        uuid.NewString(),
		Total:           10000,
		Items: []contract.CreateExpenseItemRequest{
			{
				ChartOfAccountID: uuid.NewString(),
				Amount:           10000,
			},
		},
	}

	err, code := v.ValidateCreateExpenseRequest(req)

	require.Error(t, err)
	require.Equal(t, constants.MissingFieldErrorCode, code)
	require.Contains(t, err.Error(), "item 0: item is required")
}

func TestExpenseValidatorCreateDoesNotRequireHeaderExpenseName(t *testing.T) {
	v := NewExpenseValidator()

	req := &contract.CreateExpenseRequest{
		Receiver:        "Cashier",
		TransactionDate: "2026-05-29",
		CodeNumber:      "EXP-001",
		OutletID:        uuid.NewString(),
		Total:           10000,
		Items: []contract.CreateExpenseItemRequest{
			{
				ChartOfAccountID: uuid.NewString(),
				Item:             "Cleaning supplies",
				Amount:           10000,
			},
		},
	}

	err, code := v.ValidateCreateExpenseRequest(req)

	require.NoError(t, err)
	require.Empty(t, code)
}

func TestExpenseValidatorCreateAllowsValidOptionalStatus(t *testing.T) {
	v := NewExpenseValidator()
	status := "approved"

	req := &contract.CreateExpenseRequest{
		Receiver:        "Cashier",
		TransactionDate: "2026-05-29",
		CodeNumber:      "EXP-001",
		OutletID:        uuid.NewString(),
		Status:          &status,
		Total:           10000,
		Items: []contract.CreateExpenseItemRequest{
			{
				ChartOfAccountID: uuid.NewString(),
				Item:             "Cleaning supplies",
				Amount:           10000,
			},
		},
	}

	err, code := v.ValidateCreateExpenseRequest(req)

	require.NoError(t, err)
	require.Empty(t, code)
}

func TestExpenseValidatorCreateRejectsInvalidStatus(t *testing.T) {
	v := NewExpenseValidator()
	status := "cancelled"

	req := &contract.CreateExpenseRequest{
		Receiver:        "Cashier",
		TransactionDate: "2026-05-29",
		CodeNumber:      "EXP-001",
		OutletID:        uuid.NewString(),
		Status:          &status,
		Total:           10000,
		Items: []contract.CreateExpenseItemRequest{
			{
				ChartOfAccountID: uuid.NewString(),
				Item:             "Cleaning supplies",
				Amount:           10000,
			},
		},
	}

	err, code := v.ValidateCreateExpenseRequest(req)

	require.Error(t, err)
	require.Equal(t, constants.MalformedFieldErrorCode, code)
	require.Contains(t, err.Error(), "status must be one of: draft, sent, approved, cancel")
}

func TestExpenseValidatorUpdateRejectsEmptyItemNameWhenProvided(t *testing.T) {
	v := NewExpenseValidator()
	empty := " "

	req := &contract.UpdateExpenseRequest{
		Items: []contract.UpdateExpenseItemRequest{
			{Item: &empty},
		},
	}

	err, code := v.ValidateUpdateExpenseRequest(req)

	require.Error(t, err)
	require.Equal(t, constants.MalformedFieldErrorCode, code)
	require.Contains(t, err.Error(), "item 0: item cannot be empty")
}

func TestExpenseValidatorUpdateRejectsInvalidStatus(t *testing.T) {
	v := NewExpenseValidator()
	status := "cancelled"

	req := &contract.UpdateExpenseRequest{Status: &status}

	err, code := v.ValidateUpdateExpenseRequest(req)

	require.Error(t, err)
	require.Equal(t, constants.MalformedFieldErrorCode, code)
	require.Contains(t, err.Error(), "status must be one of: draft, sent, approved, cancel")
}

func TestExpenseValidatorListRejectsInvalidStatus(t *testing.T) {
	v := NewExpenseValidator()

	req := &contract.ListExpenseRequest{
		Page:   1,
		Limit:  10,
		Status: "cancelled",
	}

	err, code := v.ValidateListExpenseRequest(req)

	require.Error(t, err)
	require.Equal(t, constants.MalformedFieldErrorCode, code)
	require.Contains(t, err.Error(), "status must be one of: draft, sent, approved, cancel")
}