package logic

import (
	"context"
	"fmt"

	"lone-services/pkg/redis"
	"lone-services/pkg/utils"
	"lone-services/pkg/validate"
	"lone-services/pkg/wechat/qrcode"
	pkgws "lone-services/pkg/ws"
	chore "lone-services/rpc/chore/pb"
	user "lone-services/rpc/user/pb"
	userconfig "lone-services/services/user/internal/config"
	"lone-services/services/user/internal/svc"
	"lone-services/services/user/validator"

	"github.com/google/uuid"
	jsoniter "github.com/json-iterator/go"
	"github.com/zeromicro/go-zero/core/logx"
)

type GenerateQrcodeLogic struct {
	ctx    context.Context
	svcCtx *svc.ServiceContext
	logx.Logger
}

func NewGenerateQrcodeLogic(ctx context.Context, svcCtx *svc.ServiceContext) *GenerateQrcodeLogic {
	return &GenerateQrcodeLogic{
		ctx:    ctx,
		svcCtx: svcCtx,
		Logger: logx.WithContext(ctx),
	}
}

func (l *GenerateQrcodeLogic) GenerateQrcode(in *user.GenerateQrcodeReq) (*user.Response, error) {
	var req validator.GenerateQrcodeValidator
	if msg := validate.ValidateFromProto(in, &req); msg != utils.StringEmpty {
		return outResponse(utils.ErrorParams, msg), nil
	}

	if _, err := loadEnabledClient(req.ClientCode); err != nil {
		l.Errorf("generate qrcode load client: %v", err)
		return outResponse(utils.ErrorParams, "端配置不存在或已禁用"), nil
	}

	wxCfg, err := userconfig.LoadWechatConfig(req.ClientCode)
	if err != nil {
		l.Errorf("generate qrcode wechat config: %v", err)
		return outResponse(utils.Fail, "微信配置缺失"), nil
	}

	sessionID, err := l.createSession(req.ClientCode)
	if err != nil {
		l.Errorf("generate qrcode session: %v", err)
		return outResponse(utils.Fail, "create qrcode session failed"), nil
	}

	img, err := wxCfg.NewQrcodeClient().CreateWxaCode(l.ctx, &qrcode.WxaCodeRequest{
		Path: qrcode.BuildPath(wxCfg.Page, map[string]string{
			"session_id": sessionID,
		}),
		Width:      wxCfg.Width,
		EnvVersion: wxCfg.EnvVersion,
		AutoColor:  false,
		LineColor:  &qrcode.LineColor{R: 255, G: 255, B: 255},
		IsHyaline:  true,
	})
	if err != nil {
		l.Errorf("generate qrcode wechat: %v", err)
		return outResponse(utils.Fail, err.Error()), nil
	}

	qrURL, err := l.uploadQrcode(img)
	if err != nil {
		l.Errorf("generate qrcode upload: %v", err)
		return outResponse(utils.Fail, "upload qrcode failed"), nil
	}

	return okResponse(map[string]string{
		"session_id": sessionID,
		"qrcode":     qrURL,
	}), nil
}

func (l *GenerateQrcodeLogic) createSession(clientCode string) (string, error) {
	if redis.Client == nil {
		return "", fmt.Errorf("redis not initialized")
	}
	sessionID := uuid.New().String()
	payload, err := jsoniter.MarshalToString(pkgws.Session{
		Status:     pkgws.StatusPending,
		ClientCode: clientCode,
	})
	if err != nil {
		return "", err
	}
	key := pkgws.RedisKeyQRSession + sessionID
	if err := redis.Client.Set(l.ctx, key, payload, pkgws.SessionTTL).Err(); err != nil {
		return "", err
	}
	return sessionID, nil
}

func (l *GenerateQrcodeLogic) uploadQrcode(content []byte) (string, error) {
	if l.svcCtx.ChoreSvcName == utils.StringEmpty {
		return "", fmt.Errorf("chore service name empty")
	}
	cli, err := svc.GetRpcClient(l.svcCtx.ChoreSvcName)
	if err != nil {
		return "", err
	}
	res, err := chore.NewChoreClient(cli.Conn()).InternalUpload(l.ctx, &chore.InternalUploadReq{
		Filename: uuid.New().String() + ".png",
		Content:  content,
	})
	if err != nil {
		return "", err
	}
	if res == nil || res.Url == utils.StringEmpty {
		return "", fmt.Errorf("chore upload empty url")
	}
	return res.Url, nil
}