package validator

import (
	"fmt"
	"google.golang.org/protobuf/reflect/protoreflect"

	validate "git.ikuban.com/server/kubanapis/kuban/api/validate"
)

// validateInt32 验证 int32
func (e *Engine) validateInt32(
	vctx *ValidationContext,
	fieldRules *validate.FieldRules,
	rules *validate.Int32Rules,
	value int32,
	fieldPath string,
	errors *ValidationErrors,
) error {
	if rules.Const != nil && value != *rules.Const {
		defaultMsg := fmt.Sprintf("字段 %s 必须等于 %d", fieldPath, *rules.Const)
		errors.Add(NewValidationError(fieldPath, ErrCodeInvalidValue,
			e.getErrorMessage(fieldRules, vctx, "const", defaultMsg)))
	}
	if rules.Lt != nil && value >= *rules.Lt {
		defaultMsg := fmt.Sprintf("字段 %s 必须小于 %d", fieldPath, *rules.Lt)
		errors.Add(NewValidationError(fieldPath, ErrCodeOutOfRange,
			e.getErrorMessage(fieldRules, vctx, "range", defaultMsg)))
	}
	if rules.Lte != nil && value > *rules.Lte {
		defaultMsg := fmt.Sprintf("字段 %s 必须小于等于 %d", fieldPath, *rules.Lte)
		errors.Add(NewValidationError(fieldPath, ErrCodeOutOfRange,
			e.getErrorMessage(fieldRules, vctx, "range", defaultMsg)))
	}
	if rules.Gt != nil && value <= *rules.Gt {
		defaultMsg := fmt.Sprintf("字段 %s 必须大于 %d", fieldPath, *rules.Gt)
		errors.Add(NewValidationError(fieldPath, ErrCodeOutOfRange,
			e.getErrorMessage(fieldRules, vctx, "range", defaultMsg)))
	}
	if rules.Gte != nil && value < *rules.Gte {
		defaultMsg := fmt.Sprintf("字段 %s 必须大于等于 %d", fieldPath, *rules.Gte)
		errors.Add(NewValidationError(fieldPath, ErrCodeOutOfRange,
			e.getErrorMessage(fieldRules, vctx, "range", defaultMsg)))
	}
	return e.validateInt32In(value, rules, fieldPath, errors, fieldRules, vctx)
}

func (e *Engine) validateInt32In(value int32, rules *validate.Int32Rules, fieldPath string, errors *ValidationErrors, fieldRules *validate.FieldRules, vctx *ValidationContext) error {
	if len(rules.In) > 0 {
		found := false
		for _, v := range rules.In {
			if value == v {
				found = true
				break
			}
		}
		if !found {
			defaultMsg := fmt.Sprintf("字段 %s 的值不在允许的列表中", fieldPath)
			errors.Add(NewValidationError(fieldPath, ErrCodeInvalidValue,
				e.getErrorMessage(fieldRules, vctx, "in", defaultMsg)))
		}
	}
	if len(rules.NotIn) > 0 {
		for _, v := range rules.NotIn {
			if value == v {
				defaultMsg := fmt.Sprintf("字段 %s 的值在禁止列表中", fieldPath)
				errors.Add(NewValidationError(fieldPath, ErrCodeInvalidValue,
					e.getErrorMessage(fieldRules, vctx, "not_in", defaultMsg)))
				break
			}
		}
	}
	return nil
}

// validateInt64 验证 int64
func (e *Engine) validateInt64(
	vctx *ValidationContext,
	fieldRules *validate.FieldRules,
	rules *validate.Int64Rules,
	value int64,
	fieldPath string,
	errors *ValidationErrors,
) error {
	if rules.Const != nil && value != *rules.Const {
		defaultMsg := fmt.Sprintf("字段 %s 必须等于 %d", fieldPath, *rules.Const)
		errors.Add(NewValidationError(fieldPath, ErrCodeInvalidValue,
			e.getErrorMessage(fieldRules, vctx, "const", defaultMsg)))
	}
	if rules.Lt != nil && value >= *rules.Lt {
		defaultMsg := fmt.Sprintf("字段 %s 必须小于 %d", fieldPath, *rules.Lt)
		errors.Add(NewValidationError(fieldPath, ErrCodeOutOfRange,
			e.getErrorMessage(fieldRules, vctx, "range", defaultMsg)))
	}
	if rules.Lte != nil && value > *rules.Lte {
		defaultMsg := fmt.Sprintf("字段 %s 必须小于等于 %d", fieldPath, *rules.Lte)
		errors.Add(NewValidationError(fieldPath, ErrCodeOutOfRange,
			e.getErrorMessage(fieldRules, vctx, "range", defaultMsg)))
	}
	if rules.Gt != nil && value <= *rules.Gt {
		defaultMsg := fmt.Sprintf("字段 %s 必须大于 %d", fieldPath, *rules.Gt)
		errors.Add(NewValidationError(fieldPath, ErrCodeOutOfRange,
			e.getErrorMessage(fieldRules, vctx, "range", defaultMsg)))
	}
	if rules.Gte != nil && value < *rules.Gte {
		defaultMsg := fmt.Sprintf("字段 %s 必须大于等于 %d", fieldPath, *rules.Gte)
		errors.Add(NewValidationError(fieldPath, ErrCodeOutOfRange,
			e.getErrorMessage(fieldRules, vctx, "range", defaultMsg)))
	}
	return e.validateInt64In(value, rules, fieldPath, errors, fieldRules, vctx)
}

func (e *Engine) validateInt64In(value int64, rules *validate.Int64Rules, fieldPath string, errors *ValidationErrors, fieldRules *validate.FieldRules, vctx *ValidationContext) error {
	if len(rules.In) > 0 {
		found := false
		for _, v := range rules.In {
			if value == v {
				found = true
				break
			}
		}
		if !found {
			defaultMsg := fmt.Sprintf("字段 %s 的值不在允许的列表中", fieldPath)
			errors.Add(NewValidationError(fieldPath, ErrCodeInvalidValue,
				e.getErrorMessage(fieldRules, vctx, "in", defaultMsg)))
		}
	}
	if len(rules.NotIn) > 0 {
		for _, v := range rules.NotIn {
			if value == v {
				defaultMsg := fmt.Sprintf("字段 %s 的值在禁止列表中", fieldPath)
				errors.Add(NewValidationError(fieldPath, ErrCodeInvalidValue,
					e.getErrorMessage(fieldRules, vctx, "not_in", defaultMsg)))
				break
			}
		}
	}
	return nil
}

// validateUInt32 验证 uint32
func (e *Engine) validateUInt32(
	vctx *ValidationContext,
	fieldRules *validate.FieldRules,
	rules *validate.UInt32Rules,
	value uint32,
	fieldPath string,
	errors *ValidationErrors,
) error {
	if rules.Const != nil && value != *rules.Const {
		defaultMsg := fmt.Sprintf("字段 %s 必须等于 %d", fieldPath, *rules.Const)
		errors.Add(NewValidationError(fieldPath, ErrCodeInvalidValue,
			e.getErrorMessage(fieldRules, vctx, "const", defaultMsg)))
	}
	if rules.Lt != nil && value >= *rules.Lt {
		defaultMsg := fmt.Sprintf("字段 %s 必须小于 %d", fieldPath, *rules.Lt)
		errors.Add(NewValidationError(fieldPath, ErrCodeOutOfRange,
			e.getErrorMessage(fieldRules, vctx, "range", defaultMsg)))
	}
	if rules.Lte != nil && value > *rules.Lte {
		defaultMsg := fmt.Sprintf("字段 %s 必须小于等于 %d", fieldPath, *rules.Lte)
		errors.Add(NewValidationError(fieldPath, ErrCodeOutOfRange,
			e.getErrorMessage(fieldRules, vctx, "range", defaultMsg)))
	}
	if rules.Gt != nil && value <= *rules.Gt {
		defaultMsg := fmt.Sprintf("字段 %s 必须大于 %d", fieldPath, *rules.Gt)
		errors.Add(NewValidationError(fieldPath, ErrCodeOutOfRange,
			e.getErrorMessage(fieldRules, vctx, "range", defaultMsg)))
	}
	if rules.Gte != nil && value < *rules.Gte {
		defaultMsg := fmt.Sprintf("字段 %s 必须大于等于 %d", fieldPath, *rules.Gte)
		errors.Add(NewValidationError(fieldPath, ErrCodeOutOfRange,
			e.getErrorMessage(fieldRules, vctx, "range", defaultMsg)))
	}
	return e.validateUInt32In(value, rules, fieldPath, errors, fieldRules, vctx)
}

func (e *Engine) validateUInt32In(value uint32, rules *validate.UInt32Rules, fieldPath string, errors *ValidationErrors, fieldRules *validate.FieldRules, vctx *ValidationContext) error {
	if len(rules.In) > 0 {
		found := false
		for _, v := range rules.In {
			if value == v {
				found = true
				break
			}
		}
		if !found {
			defaultMsg := fmt.Sprintf("字段 %s 的值不在允许的列表中", fieldPath)
			errors.Add(NewValidationError(fieldPath, ErrCodeInvalidValue,
				e.getErrorMessage(fieldRules, vctx, "in", defaultMsg)))
		}
	}
	if len(rules.NotIn) > 0 {
		for _, v := range rules.NotIn {
			if value == v {
				defaultMsg := fmt.Sprintf("字段 %s 的值在禁止列表中", fieldPath)
				errors.Add(NewValidationError(fieldPath, ErrCodeInvalidValue,
					e.getErrorMessage(fieldRules, vctx, "not_in", defaultMsg)))
				break
			}
		}
	}
	return nil
}

// validateUInt64 验证 uint64
func (e *Engine) validateUInt64(
	vctx *ValidationContext,
	fieldRules *validate.FieldRules,
	rules *validate.UInt64Rules,
	value uint64,
	fieldPath string,
	errors *ValidationErrors,
) error {
	if rules.Const != nil && value != *rules.Const {
		defaultMsg := fmt.Sprintf("字段 %s 必须等于 %d", fieldPath, *rules.Const)
		errors.Add(NewValidationError(fieldPath, ErrCodeInvalidValue,
			e.getErrorMessage(fieldRules, vctx, "const", defaultMsg)))
	}
	if rules.Lt != nil && value >= *rules.Lt {
		defaultMsg := fmt.Sprintf("字段 %s 必须小于 %d", fieldPath, *rules.Lt)
		errors.Add(NewValidationError(fieldPath, ErrCodeOutOfRange,
			e.getErrorMessage(fieldRules, vctx, "range", defaultMsg)))
	}
	if rules.Lte != nil && value > *rules.Lte {
		defaultMsg := fmt.Sprintf("字段 %s 必须小于等于 %d", fieldPath, *rules.Lte)
		errors.Add(NewValidationError(fieldPath, ErrCodeOutOfRange,
			e.getErrorMessage(fieldRules, vctx, "range", defaultMsg)))
	}
	if rules.Gt != nil && value <= *rules.Gt {
		defaultMsg := fmt.Sprintf("字段 %s 必须大于 %d", fieldPath, *rules.Gt)
		errors.Add(NewValidationError(fieldPath, ErrCodeOutOfRange,
			e.getErrorMessage(fieldRules, vctx, "range", defaultMsg)))
	}
	if rules.Gte != nil && value < *rules.Gte {
		defaultMsg := fmt.Sprintf("字段 %s 必须大于等于 %d", fieldPath, *rules.Gte)
		errors.Add(NewValidationError(fieldPath, ErrCodeOutOfRange,
			e.getErrorMessage(fieldRules, vctx, "range", defaultMsg)))
	}
	return e.validateUInt64In(value, rules, fieldPath, errors, fieldRules, vctx)
}

func (e *Engine) validateUInt64In(value uint64, rules *validate.UInt64Rules, fieldPath string, errors *ValidationErrors, fieldRules *validate.FieldRules, vctx *ValidationContext) error {
	if len(rules.In) > 0 {
		found := false
		for _, v := range rules.In {
			if value == v {
				found = true
				break
			}
		}
		if !found {
			defaultMsg := fmt.Sprintf("字段 %s 的值不在允许的列表中", fieldPath)
			errors.Add(NewValidationError(fieldPath, ErrCodeInvalidValue,
				e.getErrorMessage(fieldRules, vctx, "in", defaultMsg)))
		}
	}
	if len(rules.NotIn) > 0 {
		for _, v := range rules.NotIn {
			if value == v {
				defaultMsg := fmt.Sprintf("字段 %s 的值在禁止列表中", fieldPath)
				errors.Add(NewValidationError(fieldPath, ErrCodeInvalidValue,
					e.getErrorMessage(fieldRules, vctx, "not_in", defaultMsg)))
				break
			}
		}
	}
	return nil
}

// validateFloat 验证 float32
func (e *Engine) validateFloat(
	vctx *ValidationContext,
	fieldRules *validate.FieldRules,
	rules *validate.FloatRules,
	value float32,
	fieldPath string,
	errors *ValidationErrors,
) error {
	if rules.Const != nil && value != *rules.Const {
		defaultMsg := fmt.Sprintf("字段 %s 必须等于 %f", fieldPath, *rules.Const)
		errors.Add(NewValidationError(fieldPath, ErrCodeInvalidValue,
			e.getErrorMessage(fieldRules, vctx, "const", defaultMsg)))
	}
	if rules.Lt != nil && value >= *rules.Lt {
		defaultMsg := fmt.Sprintf("字段 %s 必须小于 %f", fieldPath, *rules.Lt)
		errors.Add(NewValidationError(fieldPath, ErrCodeOutOfRange,
			e.getErrorMessage(fieldRules, vctx, "range", defaultMsg)))
	}
	if rules.Lte != nil && value > *rules.Lte {
		defaultMsg := fmt.Sprintf("字段 %s 必须小于等于 %f", fieldPath, *rules.Lte)
		errors.Add(NewValidationError(fieldPath, ErrCodeOutOfRange,
			e.getErrorMessage(fieldRules, vctx, "range", defaultMsg)))
	}
	if rules.Gt != nil && value <= *rules.Gt {
		defaultMsg := fmt.Sprintf("字段 %s 必须大于 %f", fieldPath, *rules.Gt)
		errors.Add(NewValidationError(fieldPath, ErrCodeOutOfRange,
			e.getErrorMessage(fieldRules, vctx, "range", defaultMsg)))
	}
	if rules.Gte != nil && value < *rules.Gte {
		defaultMsg := fmt.Sprintf("字段 %s 必须大于等于 %f", fieldPath, *rules.Gte)
		errors.Add(NewValidationError(fieldPath, ErrCodeOutOfRange,
			e.getErrorMessage(fieldRules, vctx, "range", defaultMsg)))
	}
	return nil
}

// validateDouble 验证 float64
func (e *Engine) validateDouble(
	vctx *ValidationContext,
	fieldRules *validate.FieldRules,
	rules *validate.DoubleRules,
	value float64,
	fieldPath string,
	errors *ValidationErrors,
) error {
	if rules.Const != nil && value != *rules.Const {
		defaultMsg := fmt.Sprintf("字段 %s 必须等于 %f", fieldPath, *rules.Const)
		errors.Add(NewValidationError(fieldPath, ErrCodeInvalidValue,
			e.getErrorMessage(fieldRules, vctx, "const", defaultMsg)))
	}
	if rules.Lt != nil && value >= *rules.Lt {
		defaultMsg := fmt.Sprintf("字段 %s 必须小于 %f", fieldPath, *rules.Lt)
		errors.Add(NewValidationError(fieldPath, ErrCodeOutOfRange,
			e.getErrorMessage(fieldRules, vctx, "range", defaultMsg)))
	}
	if rules.Lte != nil && value > *rules.Lte {
		defaultMsg := fmt.Sprintf("字段 %s 必须小于等于 %f", fieldPath, *rules.Lte)
		errors.Add(NewValidationError(fieldPath, ErrCodeOutOfRange,
			e.getErrorMessage(fieldRules, vctx, "range", defaultMsg)))
	}
	if rules.Gt != nil && value <= *rules.Gt {
		defaultMsg := fmt.Sprintf("字段 %s 必须大于 %f", fieldPath, *rules.Gt)
		errors.Add(NewValidationError(fieldPath, ErrCodeOutOfRange,
			e.getErrorMessage(fieldRules, vctx, "range", defaultMsg)))
	}
	if rules.Gte != nil && value < *rules.Gte {
		defaultMsg := fmt.Sprintf("字段 %s 必须大于等于 %f", fieldPath, *rules.Gte)
		errors.Add(NewValidationError(fieldPath, ErrCodeOutOfRange,
			e.getErrorMessage(fieldRules, vctx, "range", defaultMsg)))
	}
	return nil
}

// validateBool 验证 bool
func (e *Engine) validateBool(
	vctx *ValidationContext,
	fieldRules *validate.FieldRules,
	rules *validate.BoolRules,
	value bool,
	fieldPath string,
	errors *ValidationErrors,
) error {
	if rules.Const != nil && value != *rules.Const {
		defaultMsg := fmt.Sprintf("字段 %s 必须等于 %t", fieldPath, *rules.Const)
		errors.Add(NewValidationError(fieldPath, ErrCodeInvalidValue,
			e.getErrorMessage(fieldRules, vctx, "const", defaultMsg)))
	}
	return nil
}

// validateRepeated 验证 repeated 字段
func (e *Engine) validateRepeated(
	vctx *ValidationContext,
	fieldRules *validate.FieldRules,
	rules *validate.RepeatedRules,
	list protoreflect.List,
	field protoreflect.FieldDescriptor,
	fieldPath string,
	errors *ValidationErrors,
) error {
	if list == nil {
		return nil
	}

	size := list.Len()

	// 验证元素数量
	if rules.MinItems != nil && uint64(size) < *rules.MinItems {
		defaultMsg := fmt.Sprintf("字段 %s 至少需要 %d 个元素", fieldPath, *rules.MinItems)
		errors.Add(NewValidationError(fieldPath, ErrCodeInvalidLength,
			e.getErrorMessage(fieldRules, vctx, "min_items", defaultMsg)))
	}
	if rules.MaxItems != nil && uint64(size) > *rules.MaxItems {
		defaultMsg := fmt.Sprintf("字段 %s 最多允许 %d 个元素", fieldPath, *rules.MaxItems)
		errors.Add(NewValidationError(fieldPath, ErrCodeInvalidLength,
			e.getErrorMessage(fieldRules, vctx, "max_items", defaultMsg)))
	}

	// 验证唯一性
	if rules.Unique != nil && *rules.Unique {
		seen := make(map[interface{}]bool)
		for i := 0; i < size; i++ {
			item := list.Get(i).Interface()
			if seen[item] {
				defaultMsg := fmt.Sprintf("字段 %s 包含重复元素", fieldPath)
				errors.Add(NewValidationError(fieldPath, ErrCodeInvalidValue,
					e.getErrorMessage(fieldRules, vctx, "unique", defaultMsg)))
				break
			}
			seen[item] = true
		}
	}

	// TODO: 验证每个元素(需要递归调用validateFieldType)

	return nil
}

// validateMap 验证 map 字段
func (e *Engine) validateMap(
	vctx *ValidationContext,
	fieldRules *validate.FieldRules,
	rules *validate.MapRules,
	mapValue protoreflect.Map,
	field protoreflect.FieldDescriptor,
	fieldPath string,
	errors *ValidationErrors,
) error {
	if mapValue == nil {
		return nil
	}

	size := mapValue.Len()

	// 验证键值对数量
	if rules.MinPairs != nil && uint64(size) < *rules.MinPairs {
		defaultMsg := fmt.Sprintf("字段 %s 至少需要 %d 个键值对", fieldPath, *rules.MinPairs)
		errors.Add(NewValidationError(fieldPath, ErrCodeInvalidLength,
			e.getErrorMessage(fieldRules, vctx, "min_pairs", defaultMsg)))
	}
	if rules.MaxPairs != nil && uint64(size) > *rules.MaxPairs {
		defaultMsg := fmt.Sprintf("字段 %s 最多允许 %d 个键值对", fieldPath, *rules.MaxPairs)
		errors.Add(NewValidationError(fieldPath, ErrCodeInvalidLength,
			e.getErrorMessage(fieldRules, vctx, "max_pairs", defaultMsg)))
	}

	// TODO: 验证 keys 和 values

	return nil
}