package controllers

import (
	"encoding/json"
	"io"
	"strconv"
	"strings"

	"server/pkg/identity"
	"server/pkg/jwtutil"
	"server/services/dailyreport"

	beego "github.com/beego/beego/v2/server/web"
)

// BackendOaDailyReportController OA工作日报（后台 PC 端）。
//
// 可见范围由 services/dailyreport 统一判定：
//   - 本人：自己的全部日报（含草稿），补写窗口内可编辑/删除；
//   - 部门主管：本人作为负责人的部门及其下级部门成员「已提交」的日报；
//   - 租户管理员：全租户日报，可删除任意日报与评论。
type BackendOaDailyReportController struct {
	beego.Controller
}

func (c *BackendOaDailyReportController) odrClaims() (*jwtutil.Claims, error) {
	return identity.Claims(c.Ctx.Request.Header.Get("Authorization"), identity.EndBackend)
}

func (c *BackendOaDailyReportController) odrErr(status, bizCode int, msg string) {
	c.Ctx.Output.SetStatus(status)
	c.Data["json"] = map[string]interface{}{"code": bizCode, "msg": msg}
	_ = c.ServeJSON()
}

func (c *BackendOaDailyReportController) odrOk(data interface{}) {
	c.Data["json"] = map[string]interface{}{"code": 200, "msg": "success", "data": data}
	_ = c.ServeJSON()
}

func (c *BackendOaDailyReportController) odrFail(err error) {
	code := dailyreport.StatusOf(err, 500)
	msg := err.Error()
	if code == 500 {
		msg = "操作失败，请稍后重试"
	}
	c.odrErr(code, code, msg)
}

// odrCtx 解析令牌并组装日报身份；失败时已输出响应。
func (c *BackendOaDailyReportController) odrCtx() (*dailyreport.UserContext, bool) {
	claims, err := c.odrClaims()
	if err != nil {
		code := identity.Status(err)
		c.odrErr(code, code, err.Error())
		return nil, false
	}
	u, err := dailyreport.BuildContext(
		uint64(claims.TenantId), uint64(claims.UserID), claims.Username, claims.UserType == "platform")
	if err != nil {
		c.odrFail(err)
		return nil, false
	}
	return u, true
}

func (c *BackendOaDailyReportController) odrIDParam(name string) uint64 {
	id, _ := strconv.ParseUint(c.Ctx.Input.Param(name), 10, 64)
	if id == 0 {
		c.odrErr(400, 400, "无效ID")
	}
	return id
}

// Profile GET /backend/oa/dailyreport/profile
// 返回当前用户身份、补写窗口与团队可见性，供页面决定是否显示「团队日报」Tab。
func (c *BackendOaDailyReportController) Profile() {
	u, ok := c.odrCtx()
	if !ok {
		return
	}
	teamOrgs := u.TeamOrgIDs
	if teamOrgs == nil {
		teamOrgs = []uint64{}
	}
	c.odrOk(map[string]interface{}{
		"user_id":       u.UID,
		"user_name":     u.Name,
		"org_id":        u.OrgID,
		"org_name":      u.OrgName,
		"is_admin":      u.IsAdmin,
		"can_view_team": u.CanViewTeam,
		"team_org_ids":  teamOrgs,
		"window_start":  dailyreport.WindowStart(),
		"window_end":    dailyreport.Today(),
		"backfill_days": dailyreport.BackfillDays,
	})
}

// MineList GET /backend/oa/dailyreport/mine/list
// 我的日报分页列表，支持 start_date/end_date 筛选。
func (c *BackendOaDailyReportController) MineList() {
	u, ok := c.odrCtx()
	if !ok {
		return
	}
	page, _ := c.GetInt("page", 1)
	pageSize, _ := c.GetInt("pageSize", 20)
	res, err := dailyreport.ListMine(u, dailyreport.MineQuery{
		StartDate: strings.TrimSpace(c.GetString("start_date")),
		EndDate:   strings.TrimSpace(c.GetString("end_date")),
		Page:      page,
		PageSize:  pageSize,
	})
	if err != nil {
		c.odrFail(err)
		return
	}
	c.odrOk(res)
}

// Save POST /backend/oa/dailyreport/save
// 新建或更新日报；submit=true 提交，false 存草稿。
func (c *BackendOaDailyReportController) Save() {
	u, ok := c.odrCtx()
	if !ok {
		return
	}
	var in dailyreport.SaveInput
	raw, err := io.ReadAll(c.Ctx.Request.Body)
	if err != nil || json.Unmarshal(raw, &in) != nil {
		c.odrErr(400, 400, "参数错误")
		return
	}
	item, err := dailyreport.Save(u, in)
	if err != nil {
		c.odrFail(err)
		return
	}
	c.odrOk(item)
}

// Detail GET /backend/oa/dailyreport/detail/:id
func (c *BackendOaDailyReportController) Detail() {
	u, ok := c.odrCtx()
	if !ok {
		return
	}
	id := c.odrIDParam(":id")
	if id == 0 {
		return
	}
	detail, err := dailyreport.GetDetail(u, id)
	if err != nil {
		c.odrFail(err)
		return
	}
	c.odrOk(detail)
}

// Delete DELETE /backend/oa/dailyreport/delete/:id
func (c *BackendOaDailyReportController) Delete() {
	u, ok := c.odrCtx()
	if !ok {
		return
	}
	id := c.odrIDParam(":id")
	if id == 0 {
		return
	}
	if err := dailyreport.Delete(u, id); err != nil {
		c.odrFail(err)
		return
	}
	c.odrOk(map[string]interface{}{"id": id})
}

// Withdraw POST /backend/oa/dailyreport/withdraw/:id
// 撤销提交：已提交日报退回草稿并留存本次提交的内容快照，改完需重新提交。
func (c *BackendOaDailyReportController) Withdraw() {
	u, ok := c.odrCtx()
	if !ok {
		return
	}
	id := c.odrIDParam(":id")
	if id == 0 {
		return
	}
	item, err := dailyreport.Withdraw(u, id)
	if err != nil {
		c.odrFail(err)
		return
	}
	c.odrOk(item)
}

// Calendar GET /backend/oa/dailyreport/calendar
// 我的日报近期热力图：months 默认 3，返回区间内逐日状态（草稿/已提交），供前端按月、按周渲染。
func (c *BackendOaDailyReportController) Calendar() {
	u, ok := c.odrCtx()
	if !ok {
		return
	}
	months, _ := c.GetInt("months", 3)
	res, err := dailyreport.Calendar(u, months)
	if err != nil {
		c.odrFail(err)
		return
	}
	c.odrOk(res)
}

// TeamStatus GET /backend/oa/dailyreport/team/status
// 团队日报汇总：date/org_id/keyword/page/pageSize。
func (c *BackendOaDailyReportController) TeamStatus() {
	u, ok := c.odrCtx()
	if !ok {
		return
	}
	page, _ := c.GetInt("page", 1)
	pageSize, _ := c.GetInt("pageSize", 20)
	orgID, _ := c.GetInt64("org_id", 0)
	res, err := dailyreport.TeamStatus(u, dailyreport.TeamQuery{
		Date:     strings.TrimSpace(c.GetString("date")),
		OrgID:    uint64(orgID),
		Keyword:  strings.TrimSpace(c.GetString("keyword")),
		Page:     page,
		PageSize: pageSize,
	})
	if err != nil {
		c.odrFail(err)
		return
	}
	c.odrOk(res)
}

// TeamOrgs GET /backend/oa/dailyreport/team/orgs
func (c *BackendOaDailyReportController) TeamOrgs() {
	u, ok := c.odrCtx()
	if !ok {
		return
	}
	orgs, err := dailyreport.TeamOrgs(u)
	if err != nil {
		c.odrFail(err)
		return
	}
	c.odrOk(map[string]interface{}{"list": orgs})
}

type oaDailyReportCommentPayload struct {
	ReportID  uint64 `json:"report_id"`
	Content   string `json:"content"`
	ReplyToID uint64 `json:"reply_to_id"`
}

// Comment POST /backend/oa/dailyreport/comment
func (c *BackendOaDailyReportController) Comment() {
	u, ok := c.odrCtx()
	if !ok {
		return
	}
	var payload oaDailyReportCommentPayload
	raw, err := io.ReadAll(c.Ctx.Request.Body)
	if err != nil || json.Unmarshal(raw, &payload) != nil {
		c.odrErr(400, 400, "参数错误")
		return
	}
	if payload.ReportID == 0 {
		c.odrErr(400, 400, "缺少日报ID")
		return
	}
	comment, err := dailyreport.AddComment(u, payload.ReportID, payload.Content, payload.ReplyToID)
	if err != nil {
		c.odrFail(err)
		return
	}
	c.odrOk(comment)
}

// DeleteComment DELETE /backend/oa/dailyreport/comment/:id
func (c *BackendOaDailyReportController) DeleteComment() {
	u, ok := c.odrCtx()
	if !ok {
		return
	}
	id := c.odrIDParam(":id")
	if id == 0 {
		return
	}
	if err := dailyreport.DeleteComment(u, id); err != nil {
		c.odrFail(err)
		return
	}
	c.odrOk(map[string]interface{}{"id": id})
}