package wechatrepoimpl

import (
	"fmt"
	"strings"

	"github.com/go-kratos/kratos/v2/errors"
	err2 "voucher/api/err"
)

// ErrCode 定义错误码类型
// https://pay.weixin.qq.com/doc/v3/merchant/4012463767
type ErrCode string

// 定义错误码常量
const (
	APPID_MCHID_NOT_MATCH ErrCode = "APPID_MCHID_NOT_MATCH"
	INVALID_REQUEST       ErrCode = "INVALID_REQUEST"
	PARAM_ERROR           ErrCode = "PARAM_ERROR"
	MCH_NOT_EXISTS        ErrCode = "MCH_NOT_EXISTS"
	NOT_ENOUGH            ErrCode = "NOT_ENOUGH"
	REQUEST_BLOCKED       ErrCode = "REQUEST_BLOCKED"
	RULE_LIMIT            ErrCode = "RULE_LIMIT"
	USER_ACCOUNT_ABNORMAL ErrCode = "USER_ACCOUNT_ABNORMAL"
	RESOURCE_NOT_EXISTS   ErrCode = "RESOURCE_NOT_EXISTS"
	FREQUENCY_LIMITED     ErrCode = "FREQUENCY_LIMITED"
)

// APIError 定义 API 错误结构体
type APIError struct {
	StatusCode  int     `json:"status_code"`
	ErrorCode   ErrCode `json:"error_code"`
	Description string  `json:"description"`
	Hint        string  `json:"hint"`
}

// 定义错误映射，方便根据错误码获取错误信息
var _ = map[ErrCode][]APIError{
	APPID_MCHID_NOT_MATCH: {
		{
			StatusCode:  400,
			ErrorCode:   APPID_MCHID_NOT_MATCH,
			Description: "商户号与AppID不匹配",
			Hint:        "调用接口的商户号需与接口传入的AppID有绑定关系，请参考常见问题Q4",
		},
	},
	INVALID_REQUEST: {
		{
			StatusCode:  400,
			ErrorCode:   INVALID_REQUEST,
			Description: "OpenID与AppID不匹配",
			Hint:        "OpenID与AppID需有对应关系",
		},
		{
			StatusCode:  400,
			ErrorCode:   INVALID_REQUEST,
			Description: "非法的商户号",
			Hint:        "请检查商户号准确性",
		},
		{
			StatusCode:  400,
			ErrorCode:   INVALID_REQUEST,
			Description: "调用频率过高",
			Hint:        "请降低API调用频率",
		},
		{
			StatusCode:  400,
			ErrorCode:   INVALID_REQUEST,
			Description: "活动已结束或未激活",
			Hint:        "请检查批次状态",
		},
		{
			StatusCode:  400,
			ErrorCode:   INVALID_REQUEST,
			Description: "批次信息获取失败，请确认参数是否有误",
			Hint:        "请检查创建商户号与批次号的对应关系",
		},
	},
	PARAM_ERROR: {
		{
			StatusCode:  400,
			ErrorCode:   PARAM_ERROR,
			Description: "AppID必填",
			Hint:        "请输入AppID",
		},
		{
			StatusCode:  400,
			ErrorCode:   PARAM_ERROR,
			Description: "OpenID必填",
			Hint:        "请输入OpenID",
		},
		{
			StatusCode:  400,
			ErrorCode:   PARAM_ERROR,
			Description: "批次号必填",
			Hint:        "请输入批次号",
		},
		{
			StatusCode:  400,
			ErrorCode:   PARAM_ERROR,
			Description: "商户号必填",
			Hint:        "请输入商户号",
		},
		{
			StatusCode:  400,
			ErrorCode:   PARAM_ERROR,
			Description: "非法的批次状态",
			Hint:        "请检查批次状态，仅支持发放状态为“运营中”的代金券批次",
		},
	},
	MCH_NOT_EXISTS: {
		{
			StatusCode:  403,
			ErrorCode:   MCH_NOT_EXISTS,
			Description: "商户号不合法",
			Hint:        "请检查商户号准确性",
		},
	},
	NOT_ENOUGH: {
		{
			StatusCode:  403,
			ErrorCode:   NOT_ENOUGH,
			Description: "批次预算不足",
			Hint:        "批次预算已发放完，请补充批次预算",
		},
		{
			StatusCode:  403,
			ErrorCode:   NOT_ENOUGH,
			Description: "发券超过单天限额",
			Hint:        "已超过该批次设置的单天发放限制额度，无法发放",
		},
		{
			StatusCode:  403,
			ErrorCode:   NOT_ENOUGH,
			Description: "账户余额不足，请充值",
			Hint:        "商户号余额不足，无法继续发券，请充值",
		},
		{
			StatusCode:  403,
			ErrorCode:   NOT_ENOUGH,
			Description: "批次预算耗尽",
			Hint:        "该批次的预算已经耗尽",
		},
	},
	REQUEST_BLOCKED: {
		{
			StatusCode:  403,
			ErrorCode:   REQUEST_BLOCKED,
			Description: "商户无权发券",
			Hint:        "该批次不支持其他商户发放，请参考常见问题Q1",
		},
		{
			StatusCode:  403,
			ErrorCode:   REQUEST_BLOCKED,
			Description: "批次不支持跨商户发券",
			Hint:        "该批次不支持其他商户发放，请参考常见问题Q1",
		},
		{
			StatusCode:  403,
			ErrorCode:   REQUEST_BLOCKED,
			Description: "用户被限领拦截",
			Hint:        "该用户已达到该批次的领取上限，请参考常见问题Q6",
		},
		{
			StatusCode:  403,
			ErrorCode:   REQUEST_BLOCKED,
			Description: "不能在API渠道发放",
			Hint:        "请检查批次信息，仅支持发放微信支付代金券，不支持发放立减与折扣",
		},
		{
			StatusCode:  403,
			ErrorCode:   REQUEST_BLOCKED,
			Description: "不支持指定面额发券",
			Hint:        "仅在发券时指定面额及门槛的场景才生效，常规发券场景请勿传入该信息",
		},
		{
			StatusCode:  403,
			ErrorCode:   REQUEST_BLOCKED,
			Description: "仅在广告场景下发放批次",
			Hint:        "该批次已在朋友圈广告发放，不支持在其他渠道发放",
		},
	},
	RULE_LIMIT: {
		{
			StatusCode:  403,
			ErrorCode:   RULE_LIMIT,
			Description: "用户已达最大领券次数",
			Hint:        "该用户已达到该批次的领取上限，请参考常见问题Q6",
		},
		{
			StatusCode:  403,
			ErrorCode:   RULE_LIMIT,
			Description: "被自然人规则拦截",
			Hint:        "该自然人已达到该批次的领取上限，请参考常见问题Q6",
		},
	},
	USER_ACCOUNT_ABNORMAL: {
		{
			StatusCode:  403,
			ErrorCode:   USER_ACCOUNT_ABNORMAL,
			Description: "用户非法",
			Hint:        "用户命中微信支付风控模型，请参考常见问题Q5",
		},
	},
	RESOURCE_NOT_EXISTS: {
		{
			StatusCode:  404,
			ErrorCode:   RESOURCE_NOT_EXISTS,
			Description: "批次不存在",
			Hint:        "请检查批次及制券商户号信息",
		},
	},
	FREQUENCY_LIMITED: {
		{
			StatusCode:  429,
			ErrorCode:   FREQUENCY_LIMITED,
			Description: "当前请求人数过多，请稍后重试",
			Hint:        "请降低API调用频率",
		},
	},
}

// 使用常量定义错误描述，减少硬编码
const (
	ErrorUserIllegal                       = "用户非法"
	ErrorAppIDMchIDMismatch                = "商户号与AppID不匹配"
	ErrorOpenIDAppIDMismatch               = "OpenID与AppID不匹配"
	ErrorInvalidMerchantID                 = "非法的商户号"
	ErrorHighFrequency                     = "调用频率过高"
	ErrorActivityInactive                  = "活动已结束或未激活"
	ErrorBatchInfoError                    = "批次信息获取失败，请确认参数是否有误"
	ErrorAppIDRequired                     = "AppID必填"
	ErrorOpenIDRequired                    = "OpenID必填"
	ErrorBatchIDRequired                   = "批次号必填"
	ErrorMerchantIDRequired                = "商户号必填"
	ErrorInvalidBatchStatus                = "非法的批次状态"
	ErrorMchNotExists                      = "商户号不合法"
	ErrorBatchBudgetInsufficient           = "批次预算不足"
	ErrorDailyLimitExceeded                = "发券超过单天限额"
	ErrorAccountBalanceInsufficient        = "账户余额不足，请充值"
	ErrorBatchBudgetDepleted               = "批次预算耗尽"
	ErrorMerchantNoPermission              = "商户无权发券"
	ErrorCrossMerchantNotSupported         = "批次不支持跨商户发券"
	ErrorUserReceiveLimit                  = "用户被限领拦截"
	ErrorAPIChannelNotSupported            = "不能在API渠道发放"
	ErrorSpecifiedDenominationNotSupported = "不支持指定面额发券"
	ErrorOnlyAdvertisingBatch              = "仅在广告场景下发放批次"
	ErrorUserMaxCoupons                    = "用户已达最大领券次数"
	ErrorNaturalPersonRuleBlocked          = "被自然人规则拦截"
	ErrorResourceNotExists                 = "批次不存在"
	ErrorFrequencyLimited                  = "当前请求人数过多，请稍后重试"
)

// WechatError 映射错误描述到具体的错误处理
var WechatError = map[string]*errors.Error{
	ErrorUserIllegal:                       err2.ErrorWechatUserIllegal(ErrorUserIllegal),
	ErrorAppIDMchIDMismatch:                err2.ErrorWechatMismatch(ErrorAppIDMchIDMismatch),
	ErrorOpenIDAppIDMismatch:               err2.ErrorWechatMismatch(ErrorOpenIDAppIDMismatch),
	ErrorInvalidMerchantID:                 err2.ErrorWechatInvalidMerchantID(ErrorInvalidMerchantID),
	ErrorHighFrequency:                     err2.ErrorWechatHighFrequency(ErrorHighFrequency),
	ErrorActivityInactive:                  err2.ErrorWechatActivityInactive(ErrorActivityInactive),
	ErrorBatchInfoError:                    err2.ErrorWechatBatchInfoError(ErrorBatchInfoError),
	ErrorAppIDRequired:                     err2.ErrorWechatParamRequired(ErrorAppIDRequired),
	ErrorOpenIDRequired:                    err2.ErrorWechatParamRequired(ErrorOpenIDRequired),
	ErrorBatchIDRequired:                   err2.ErrorWechatParamRequired(ErrorBatchIDRequired),
	ErrorMerchantIDRequired:                err2.ErrorWechatParamRequired(ErrorMerchantIDRequired),
	ErrorInvalidBatchStatus:                err2.ErrorWechatInvalidBatchStatus(ErrorInvalidBatchStatus),
	ErrorMchNotExists:                      err2.ErrorWechatMchNotExists(ErrorMchNotExists),
	ErrorBatchBudgetInsufficient:           err2.ErrorWechatBatchBudgetInsufficient(ErrorBatchBudgetInsufficient),
	ErrorDailyLimitExceeded:                err2.ErrorWechatDailyLimitExceeded(ErrorDailyLimitExceeded),
	ErrorAccountBalanceInsufficient:        err2.ErrorWechatAccountBalanceInsufficient(ErrorAccountBalanceInsufficient),
	ErrorBatchBudgetDepleted:               err2.ErrorWechatBatchBudgetDepleted(ErrorBatchBudgetDepleted),
	ErrorMerchantNoPermission:              err2.ErrorWechatMerchantNoPermission(ErrorMerchantNoPermission),
	ErrorCrossMerchantNotSupported:         err2.ErrorWechatCrossMerchantNotSupported(ErrorCrossMerchantNotSupported),
	ErrorUserReceiveLimit:                  err2.ErrorWechatUserReceiveLimit(ErrorUserReceiveLimit),
	ErrorAPIChannelNotSupported:            err2.ErrorWechatAPIChannelNotSupported(ErrorAPIChannelNotSupported),
	ErrorSpecifiedDenominationNotSupported: err2.ErrorWechatSpecifiedDenominationNotSupported(ErrorSpecifiedDenominationNotSupported),
	ErrorOnlyAdvertisingBatch:              err2.ErrorWechatOnlyAdvertisingBatch(ErrorOnlyAdvertisingBatch),
	ErrorUserMaxCoupons:                    err2.ErrorWechatUserMaxCoupons(ErrorUserMaxCoupons),
	ErrorNaturalPersonRuleBlocked:          err2.ErrorWechatNaturalPersonRuleBlocked(ErrorNaturalPersonRuleBlocked),
	ErrorResourceNotExists:                 err2.ErrorWechatResourceNotExists(ErrorResourceNotExists),
	ErrorFrequencyLimited:                  err2.ErrorWechatFrequencyLimited(ErrorFrequencyLimited),
}

type ErrBody struct {
	Code    ErrCode `json:"Code"`
	Message string  `json:"Message"`
}

// GetWechatError 根据错误描述获取具体的错误处理
func (s ErrBody) GetWechatError() *errors.Error {
	lowerDesc := strings.ToLower(s.Message)
	for desc, err := range WechatError {
		if strings.ToLower(desc) == lowerDesc {
			return err
		}
	}
	return err2.ErrorWechatFAIL(fmt.Sprintf("微信返回错误:%s", s.Message))
}