package user

import (
	"context"
	"errors"

	"perms-system-server/internal/consts"
	authHelper "perms-system-server/internal/logic/auth"
	"perms-system-server/internal/middleware"
	userModel "perms-system-server/internal/model/user"
	"perms-system-server/internal/response"
	"perms-system-server/internal/svc"
	"perms-system-server/internal/types"
	"perms-system-server/internal/util"

	"github.com/zeromicro/go-zero/core/logx"
)

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

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

func (l *UpdateUserLogic) UpdateUser(req *types.UpdateUserReq) error {
	caller := middleware.GetUserDetails(l.ctx)
	if caller == nil {
		return response.ErrUnauthorized("未登录")
	}

	if caller.UserId == req.Id {
		if req.DeptId != nil || req.Status != 0 {
			return response.ErrForbidden("不允许修改自己的部门和状态")
		}
	} else {
		productCode := middleware.GetProductCode(l.ctx)
		if err := authHelper.CheckManageAccess(l.ctx, l.svcCtx, req.Id, productCode); err != nil {
			return err
		}
	}

	user, err := l.svcCtx.SysUserModel.FindOne(l.ctx, req.Id)
	if err != nil {
		return response.ErrNotFound("用户不存在")
	}

	if caller.UserId != req.Id && user.IsSuperAdmin == consts.IsSuperAdminYes {
		if req.Status != 0 || req.DeptId != nil {
			return response.ErrForbidden("不能通过此接口修改其他超级管理员的状态和部门")
		}
	}

	if req.Nickname != nil && len(*req.Nickname) > 64 {
		return response.ErrBadRequest("昵称长度不能超过64个字符")
	}
	if req.Email != nil && len(*req.Email) > 64 {
		return response.ErrBadRequest("邮箱长度不能超过64个字符")
	}
	if req.Phone != nil && len(*req.Phone) > 32 {
		return response.ErrBadRequest("手机号长度不能超过32个字符")
	}
	if req.Remark != nil && len(*req.Remark) > 255 {
		return response.ErrBadRequest("备注长度不能超过255个字符")
	}

	nickname := user.Nickname
	email := user.Email
	phone := user.Phone
	remark := user.Remark
	deptId := user.DeptId

	if req.Nickname != nil {
		nickname = *req.Nickname
	}
	if req.Email != nil {
		if *req.Email != "" && !util.IsValidEmail(*req.Email) {
			return response.ErrBadRequest("邮箱格式不正确")
		}
		email = *req.Email
	}
	if req.Phone != nil {
		if *req.Phone != "" && !util.IsValidPhone(*req.Phone) {
			return response.ErrBadRequest("手机号格式不正确")
		}
		phone = *req.Phone
	}
	if req.Remark != nil {
		remark = *req.Remark
	}
	if req.DeptId != nil {
		if *req.DeptId > 0 {
			if _, err := l.svcCtx.SysDeptModel.FindOne(l.ctx, *req.DeptId); err != nil {
				return response.ErrBadRequest("部门不存在")
			}
		}
		deptId = *req.DeptId
	}

	statusChanged := false
	if req.Status != 0 {
		if req.Status != consts.StatusEnabled && req.Status != consts.StatusDisabled {
			return response.ErrBadRequest("状态值无效，仅支持 1(启用) 和 2(冻结)")
		}
		if user.Status != req.Status {
			statusChanged = true
		}
	}

	newStatus := user.Status
	if statusChanged {
		newStatus = req.Status
	}
	if err := l.svcCtx.SysUserModel.UpdateProfile(
		l.ctx, req.Id, user.Username,
		nickname, email, phone, remark, deptId,
		newStatus, statusChanged, user.UpdateTime,
	); err != nil {
		if errors.Is(err, userModel.ErrUpdateConflict) {
			return response.ErrConflict("数据已被其他操作修改，请刷新后重试")
		}
		return err
	}

	l.svcCtx.UserDetailsLoader.Clean(l.ctx, req.Id)
	return nil
}