package validation

// Tests for custom validation tags and error formatting behavior.

import (
	"strings"
	"testing"

	"github.com/stretchr/testify/require"

	errs "knowfoolery/backend/shared/domain/errors"
)

type sampleStruct struct {
	Name string `json:"name" validate:"required"`
}

type playerStruct struct {
	PlayerName string `json:"player_name" validate:"required,player_name"`
}

// TestValidator_CustomTags ensures validator custom tags behavior is handled correctly.
func TestValidator_CustomTags(t *testing.T) {
	v := NewValidator()

	require.Error(t, v.ValidateVar("bad!", "alphanum_space"))
	require.Error(t, v.ValidateVar("<b>hi</b>", "no_html"))
	require.Error(t, v.ValidateVar("javascript:alert(1)", "safe_text"))
	require.Error(t, v.ValidateVar("A", "player_name"))
}

// TestValidator_ValidateReturnsDomainError ensures validator validate returns domain error behavior is handled correctly.
func TestValidator_ValidateReturnsDomainError(t *testing.T) {
	v := NewValidator()
	err := v.Validate(sampleStruct{})
	require.Error(t, err)

	var domainErr *errs.DomainError
	require.ErrorAs(t, err, &domainErr)
	require.Equal(t, errs.CodeValidationFailed, domainErr.Code)
	require.True(t, strings.Contains(domainErr.Message, "name is required"))
}

// TestValidator_ValidateVarReturnsDomainError ensures validator validate var returns domain error behavior is handled correctly.
func TestValidator_ValidateVarReturnsDomainError(t *testing.T) {
	v := NewValidator()
	err := v.ValidateVar("bad", "email")
	require.Error(t, err)

	var domainErr *errs.DomainError
	require.ErrorAs(t, err, &domainErr)
	require.Equal(t, errs.CodeValidationFailed, domainErr.Code)
	require.Contains(t, domainErr.Message, "must be a valid email")
}

// TestValidator_JSONTagNameMapping ensures validator json tag name mapping behavior is handled correctly.
func TestValidator_JSONTagNameMapping(t *testing.T) {
	v := NewValidator()
	err := v.Validate(playerStruct{PlayerName: "A"})
	require.Error(t, err)
	require.True(t, strings.Contains(err.Error(), "player_name must be a valid player name"))
}