package admin

import (
	"fmt"
	"net/http"

	"mini-chat/internal/code"
	"mini-chat/internal/pkg/core"
	"mini-chat/internal/pkg/timeutil"
	"mini-chat/internal/pkg/validation"

	"gorm.io/gorm"
)

type listRequest struct {
	Username string `form:"username"`  // 用户名
	Nickname string `form:"nickname"`  // 昵称
	Page     int    `form:"page"`      // 当前页码，默认为第一页
	PageSize int    `form:"page_size"` // 每页返回的数据量
}

type listData struct {
	ID        int32  `json:"id"`         // 编号
	UserName  string `json:"username"`   // 用户名
	NickName  string `json:"nickname"`   // 昵称
	Mobile    string `json:"mobile"`     // 手机号
	Avatar    string `json:"avatar"`     // 头像
	CreatedAt string `json:"created_at"` // 创建时间
	UpdatedAt string `json:"updated_at"` // 更新时间
}

type listResponse struct {
	Page     int        `json:"page"`      // 当前页码
	PageSize int        `json:"page_size"` // 每页返回的数据量
	Total    int64      `json:"total"`     // 符合查询条件的总记录数
	List     []listData `json:"list"`
}

// PageList 客服列表
// @Summary 客服列表
// @Description 客服列表
// @Tags 管理端.客服管理
// @Accept json
// @Produce json
// @Param username query string false "用户名"
// @Param nickname query string false "昵称"
// @Param page query int true "当前页码" default(1)
// @Param page_size query int true "每页返回的数据量，最多 100 条" default(20)
// @Success 200 {object} listResponse
// @Failure 400 {object} code.Failure
// @Router /admin/list [get]
// @Security LoginVerifyToken
func (h *handler) PageList() core.HandlerFunc {
	return func(ctx core.Context) {
		req := new(listRequest)
		res := new(listResponse)

		if err := ctx.ShouldBindForm(req); err != nil {
			ctx.AbortWithError(core.Error(
				http.StatusBadRequest,
				code.ParamBindError,
				validation.Error(err)),
			)
			return
		}

		if req.Page == 0 {
			req.Page = 1
		}

		if req.PageSize == 0 {
			req.PageSize = 20
		}

		if req.PageSize > 100 {
			ctx.AbortWithError(core.Error(
				http.StatusBadRequest,
				code.ListAdminError,
				fmt.Sprintf("%s: 一次最多只能查询 100 条", code.Text(code.ListAdminError)),
			))
			return
		}

		query := h.readDB.Admin.WithContext(ctx.RequestContext())

		if ctx.SessionUserInfo().IsSuper != 1 {
			ctx.AbortWithError(core.Error(
				http.StatusBadRequest,
				code.ListAdminError,
				fmt.Sprintf("%s: %s", code.Text(code.ListAdminError), "禁止操作")),
			)
			return
		}

		if req.Username != "" {
			query = query.Where(h.readDB.Admin.Username.Like(fmt.Sprintf("%%%s%%", req.Username)))
		}

		if req.Nickname != "" {
			query = query.Where(h.readDB.Admin.Nickname.Like(fmt.Sprintf("%%%s%%", req.Nickname)))
		}

		listQueryDB := query.Session(&gorm.Session{})
		countQueryDB := query.Session(&gorm.Session{})

		resultData, err := listQueryDB.
			Order(h.readDB.Admin.ID.Desc()).
			Limit(req.PageSize).
			Offset((req.Page - 1) * req.PageSize).Find()
		if err != nil {
			ctx.AbortWithError(core.Error(
				http.StatusBadRequest,
				code.ListAdminError,
				fmt.Sprintf("%s：%s", code.Text(code.ListAdminError), err.Error())),
			)
			return
		}

		count, err := countQueryDB.Count()
		if err != nil {
			ctx.AbortWithError(core.Error(
				http.StatusBadRequest,
				code.ListAdminError,
				fmt.Sprintf("%s：%s", code.Text(code.ListAdminError), err.Error())),
			)
			return
		}

		res.Page = req.Page
		res.PageSize = req.PageSize
		res.Total = count
		res.List = make([]listData, len(resultData))

		for k, v := range resultData {
			res.List[k] = listData{
				ID:        v.ID,
				UserName:  v.Username,
				NickName:  v.Nickname,
				Mobile:    v.Mobile,
				Avatar:    v.Avatar,
				CreatedAt: timeutil.FriendlyTime(v.CreatedAt),
				UpdatedAt: timeutil.FriendlyTime(v.CreatedAt),
			}
		}

		ctx.Payload(res)
	}
}