package haiyuapi

import (
	"errors"
	"fmt"
)

// 海宇API平台返回码
const (
	CodeSuccess              = 0    // 业务成功
	CodeQueryEmpty           = 1000 // 查询为空
	CodeSystem               = 1001 // 接口异常
	CodeDecryptFail          = 1002 // 参数解密失败
	CodeRequestParam         = 1003 // 基础参数校验不正确
	CodeInvalidIP            = 1004 // 未经授权的IP
	CodeMissingAccessID      = 1005 // 缺少Access-Id
	CodeInvalidAccessID      = 1006 // 未经授权的AccessId
	CodeInsufficientBalance  = 1007 // 账户余额不足，无法请求
	CodeProductNotSubscribed = 1008 // 未开通此产品
	CodeBusiness             = 2001 // 业务失败
)

var (
	ErrDatasource = errors.New("数据源异常")
	ErrSystem     = errors.New("系统异常")
	ErrNotFound   = errors.New("查询为空")
)

// haiyuapiAPIError 海宇API平台错误
type haiyuapiAPIError struct {
	Code    int
	Message string
}

func (e *haiyuapiAPIError) Error() string {
	return fmt.Sprintf("海宇API返回错误，code: %d，message: %s", e.Code, e.Message)
}

// NewHaiyuapiAPIError 创建平台错误
func NewHaiyuapiAPIError(code int, message string) *haiyuapiAPIError {
	if message == "" {
		if desc := GetPlatformCodeDesc(code); desc != "" {
			message = desc
		} else {
			message = "海宇API返回未知错误"
		}
	}
	return &haiyuapiAPIError{Code: code, Message: message}
}

// platformCodeDesc 平台 code -> 官方 message
var platformCodeDesc = map[int]string{
	CodeSuccess:              "业务成功",
	CodeQueryEmpty:           "查询为空",
	CodeSystem:               "接口异常",
	CodeDecryptFail:          "参数解密失败",
	CodeRequestParam:         "基础参数校验不正确",
	CodeInvalidIP:            "未经授权的IP",
	CodeMissingAccessID:      "缺少Access-Id",
	CodeInvalidAccessID:      "未经授权的AccessId",
	CodeInsufficientBalance:  "账户余额不足，无法请求",
	CodeProductNotSubscribed: "未开通此产品",
	CodeBusiness:             "业务失败",
}

// GetPlatformCodeDesc 根据平台 code 获取描述
func GetPlatformCodeDesc(code int) string {
	if desc, ok := platformCodeDesc[code]; ok {
		return desc
	}
	return ""
}

// GetErrByCode 将海宇API code 映射为内部哨兵错误，供处理器 errors.Is 判断
//
//	1000 -> ErrNotFound（查询为空，可按产品约定当成功处理）
//	1001, 1002, 1003 -> ErrSystem（接口/解密/参数校验异常）
//	1004~1008, 2001 -> ErrDatasource（鉴权、余额、产品、业务类上游错误）
func GetErrByCode(code int) error {
	switch code {
	case CodeSuccess:
		return nil
	case CodeQueryEmpty:
		return ErrNotFound
	case CodeSystem, CodeDecryptFail, CodeRequestParam:
		return ErrSystem
	case CodeInvalidIP, CodeMissingAccessID, CodeInvalidAccessID,
		CodeInsufficientBalance, CodeProductNotSubscribed, CodeBusiness:
		return ErrDatasource
	default:
		return ErrDatasource
	}
}