package user

import (
	"context"

	"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 UserListLogic struct {
	logx.Logger
	ctx    context.Context
	svcCtx *svc.ServiceContext
}

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

func (l *UserListLogic) UserList(req *types.UserListReq) (resp *types.PageResp, err error) {
	page, pageSize := util.NormalizePage(req.Page, req.PageSize)

	caller := middleware.GetUserDetails(l.ctx)
	if caller == nil {
		return nil, response.ErrUnauthorized("未登录")
	}
	if !caller.IsSuperAdmin {
		if req.ProductCode == "" {
			return nil, response.ErrForbidden("非超管用户必须指定产品编码")
		}
		if caller.ProductCode != req.ProductCode {
			return nil, response.ErrForbidden("无权访问该产品的数据")
		}
	}

	var list []*userModel.SysUser
	var total int64
	var memberMap map[int64]string

	if req.ProductCode != "" {
		list, total, err = l.svcCtx.SysUserModel.FindListByProductMembers(l.ctx, req.ProductCode, page, pageSize)
		if err != nil {
			return nil, err
		}
	} else {
		list, total, err = l.svcCtx.SysUserModel.FindListByPage(l.ctx, page, pageSize)
		if err != nil {
			return nil, err
		}
	}

	if req.ProductCode != "" {
		userIds := make([]int64, 0, len(list))
		for _, u := range list {
			userIds = append(userIds, u.Id)
		}
		pmMap, err := l.svcCtx.SysProductMemberModel.FindMapByProductCodeUserIds(l.ctx, req.ProductCode, userIds)
		if err != nil {
			return nil, err
		}
		memberMap = make(map[int64]string, len(pmMap))
		for uid, pm := range pmMap {
			memberMap[uid] = pm.MemberType
		}
	}

	items := make([]types.UserItem, 0, len(list))
	for _, u := range list {
		avatar := ""
		if u.Avatar.Valid {
			avatar = u.Avatar.String
		}

		var memberType string
		if memberMap != nil {
			memberType = memberMap[u.Id]
		}

		items = append(items, types.UserItem{
			Id:         u.Id,
			Username:   u.Username,
			Nickname:   u.Nickname,
			Avatar:     avatar,
			Email:      u.Email,
			Phone:      u.Phone,
			Remark:     u.Remark,
			DeptId:     u.DeptId,
			Status:     u.Status,
			MemberType: memberType,
			CreateTime: u.CreateTime,
		})
	}

	return &types.PageResp{
		Total: total,
		List:  items,
	}, nil
}