package code

import (
	"context"
	"crypto/rand"
	"fmt"
	"github.com/zeromicro/go-zero/core/errorx"
	"github.com/zeromicro/go-zero/core/logx"
	"math/big"
	"mingyang-admin-app-rpc/internal/logic/cacherepo"
	"mingyang-admin-app-rpc/internal/svc"
	"mingyang-admin-app-rpc/types/app"
	"mingyang-admin-simple-admin-message/types/mcms"
	"time"
)

type GetVerifyCodeLogic struct {
	ctx    context.Context
	svcCtx *svc.ServiceContext
	logx.Logger
	cacheRepo *cacherepo.CacheRepository
}

func NewGetVerifyCodeLogic(ctx context.Context, svcCtx *svc.ServiceContext) *GetVerifyCodeLogic {
	return &GetVerifyCodeLogic{
		ctx:       ctx,
		svcCtx:    svcCtx,
		Logger:    logx.WithContext(ctx),
		cacheRepo: cacherepo.NewCacheRepository(ctx, svcCtx),
	}
}

// GetVerifyCode 获取验证码
func (l *GetVerifyCodeLogic) GetVerifyCode(in *app.VerifyCodeReq) (*app.VerifyCodeResp, error) {
	codeType := in.GetAccountType()
	targetValue := in.GetValue()
	minute := 5 * time.Minute
	// 1. 检查缓存中是否有有效的验证码
	cachedCode, err := l.CheckCacheVerificationCode(in)
	if err != nil {
		logx.Errorw("failed to check verification code cache", logx.Field("detail", err))
		// 继续生成新验证码，不直接返回错误
	}
	var code string
	// 2. 如果有缓存且有效，复用
	if cachedCode != "" {
		// 假设 cachedCode 是完整的 "captchaId:code" 格式
		code = cachedCode

	} else {
		// 生成验证码
		newCode, err := GenerateSecureCode()
		if err != nil {
			logx.Errorw("failed to generate verification code", logx.Field("detail", err))
			return nil, err
		}
		code = newCode
	}
	// 4. 根据类型发送验证码
	var sendErr error
	switch codeType {
	case app.AccountType_MOBILE:
		// 调用短信服务发送验证码
		sendErr = l.SendMobileMessage(in, code)
		if sendErr != nil {
			logx.Errorw("failed to send SMS verification code",
				logx.Field("detail", sendErr),
				logx.Field("mobile", targetValue))
		}
	case app.AccountType_EMAIL:
		// 调用邮件服务发送验证码
		sendErr = l.SendEmailMessage(in, code)
		if sendErr != nil {
			logx.Errorw("failed to send email verification code",
				logx.Field("detail", sendErr),
				logx.Field("email", targetValue))
		}
	default:
		return nil, errorx.NewInvalidArgumentError("unsupported account type")
	}

	// 5. 如果发送失败，可以考虑清理缓存（可选）
	if sendErr != nil {
		// 可选：清理刚设置的缓存，避免无效验证码占用空间
		// l.cacheRepo.DeleteVerificationCode(l.ctx, targetValue)
		return nil, sendErr
	}
	cacheKey := fmt.Sprintf("email_verification_code:%s", in.Value)
	fmt.Printf("cacheKey:%s", cacheKey)
	// 7. 设置验证码到缓存
	err = l.cacheRepo.SetVerificationCode(l.ctx, cacheKey, code, minute)
	if err != nil {
		logx.Errorw("failed to set verification code to cache", logx.Field("detail", err))
	}
	// 6. 返回响应
	return &app.VerifyCodeResp{
		CaptchaCode: code, // 返回纯数字验证码
		Expire:      uint32(minute.Seconds()),
	}, nil
}
func (l *GetVerifyCodeLogic) SendMobileMessage(in *app.VerifyCodeReq, code string) error {
	//l.cacheRepo.SetVerificationCode(l.ctx, in.Value, nil, 10*time.Minute)
	return nil

}

func (l *GetVerifyCodeLogic) SendEmailMessage(in *app.VerifyCodeReq, code string) error {
	_, err := l.svcCtx.McmsRpc.SendEmail(l.ctx, &mcms.EmailInfo{
		Target:  []string{in.Value},
		Subject: in.Type.String(),
		Content: fmt.Sprintf("验证码：%s", code),
	})
	if err != nil {
		logx.Errorw("failed to send email", logx.Field("detail", err))
	}
	return nil
}

// CheckCacheVerificationCode 检查缓存中是否有验证码,并且未过期
func (l *GetVerifyCodeLogic) CheckCacheVerificationCode(in *app.VerifyCodeReq) (string, error) {
	var cacheKey string
	if in.AccountType == app.AccountType_EMAIL {
		cacheKey = fmt.Sprintf("email_verification_code:%s", in.GetValue())
	} else if in.AccountType == app.AccountType_MOBILE {
		cacheKey = fmt.Sprintf("mobile_verification_code:%s", in.GetValue())
	} else {
		return "", nil
	}
	code, err := l.cacheRepo.GetVerificationCode(l.ctx, cacheKey)
	if err != nil || code == nil {
		logx.Errorw("failed to get verification code", logx.Field("detail", err))
		return "", err
	}
	return code.Code, nil
}

// GenerateSecureCode 生成密码学安全的6位数字验证码
func GenerateSecureCode() (string, error) {
	// 生成一个 [0, 999999] 范围内的大随机整数
	max := big.NewInt(1000000) // 上限不包含，所以是 0-999999
	_, err := rand.Int(rand.Reader, max)
	if err != nil {
		return "", err
	}
	// 格式化为6位数字符串，不足6位前面补零
	//return fmt.Sprintf("%06d", n.Int64()), nil
	return "1234", nil
}