package handler

import (
	"github.com/gin-gonic/gin"

	"github.com/sundynix/pets-be/internal/middleware"
	"github.com/sundynix/pets-be/internal/model"
	"github.com/sundynix/pets-be/internal/service"
	appjwt "github.com/sundynix/pets-be/pkg/jwt"
	"github.com/sundynix/pets-be/pkg/response"
)

type adminLoginReq struct {
	Username string `json:"username"`
	Password string `json:"password"`
}

// AdminLogin POST /api/admin/login
func (h *Handler) AdminLogin(c *gin.Context) {
	var req adminLoginReq
	if err := c.ShouldBindJSON(&req); err != nil {
		response.FailParams(c, err.Error())
		return
	}
	admin, err := h.svc.AdminLogin(req.Username, req.Password)
	if err != nil {
		response.Fail(c, 40100, "账号或密码错误")
		return
	}
	data, err := h.adminTokens(admin)
	if err != nil {
		response.FailErr(c, err)
		return
	}
	response.OK(c, data)
}

// adminTokens 签发后台的「access + refresh」令牌对。access token 2 小时。
func (h *Handler) adminTokens(admin *model.Admin) (gin.H, error) {
	token, err := h.jwt.Generate(admin.ID, appjwt.KindAdmin, admin.Username, admin.Role)
	if err != nil {
		return nil, err
	}
	refresh, refreshExp, err := h.svc.IssueRefreshToken(string(appjwt.KindAdmin), admin.ID)
	if err != nil {
		return nil, err
	}
	return gin.H{
		"token":              token,
		"refresh_token":      refresh,
		"expires_in":         h.jwt.ExpireSeconds(),
		"refresh_expires_at": refreshExp,
		"admin":              admin,
	}, nil
}

// AdminRefresh POST /api/admin/refresh
func (h *Handler) AdminRefresh(c *gin.Context) {
	var req refreshReq
	_ = c.ShouldBindJSON(&req)

	adminID, err := h.svc.ConsumeRefreshToken(req.RefreshToken, string(appjwt.KindAdmin))
	if err != nil {
		response.Fail(c, 40100, err.Error())
		return
	}
	admin, err := h.svc.GetAdmin(adminID)
	if err != nil {
		response.Fail(c, 40100, "登录已失效，请重新登录")
		return
	}
	if admin.Disabled {
		response.Fail(c, 40300, "账号已被禁用")
		return
	}
	data, err := h.adminTokens(admin)
	if err != nil {
		response.FailErr(c, err)
		return
	}
	response.OK(c, data)
}

// AdminLogout POST /api/admin/logout 作废当前刷新令牌
func (h *Handler) AdminLogout(c *gin.Context) {
	var req refreshReq
	_ = c.ShouldBindJSON(&req)
	h.svc.RevokeRefreshToken(req.RefreshToken, string(appjwt.KindAdmin))
	response.OK(c, gin.H{"ok": true})
}

// AdminMe GET /api/admin/me
func (h *Handler) AdminMe(c *gin.Context) {
	admin, err := h.svc.GetAdmin(middleware.AdminID(c))
	if err != nil {
		respondErr(c, err)
		return
	}
	response.OK(c, admin)
}

// AdminStats GET /api/admin/stats
func (h *Handler) AdminStats(c *gin.Context) {
	stats, err := h.svc.Stats()
	if err != nil {
		response.FailErr(c, err)
		return
	}
	response.OK(c, stats)
}

type adminListReq struct {
	response.PageQuery
	Keyword string `form:"keyword"`
	Status  string `form:"status"`
	Type    string `form:"type"`
}

// AdminListUsers GET /api/admin/users
func (h *Handler) AdminListUsers(c *gin.Context) {
	var req adminListReq
	_ = c.ShouldBindQuery(&req)
	req.Normalize()
	users, total, err := h.svc.ListUsers(req.Keyword, req.Type, req.Offset(), req.Limit())
	if err != nil {
		response.FailErr(c, err)
		return
	}
	response.OK(c, response.NewPage(users, total, req.PageQuery))
}

type disableReq struct {
	Disabled bool `json:"disabled"`
}

// AdminSetUserDisabled PUT /api/admin/users/:id/disabled
func (h *Handler) AdminSetUserDisabled(c *gin.Context) {
	var req disableReq
	if err := c.ShouldBindJSON(&req); err != nil {
		response.FailParams(c, err.Error())
		return
	}
	if err := h.svc.SetUserDisabled(idParam(c, "id"), req.Disabled); err != nil {
		response.FailErr(c, err)
		return
	}
	response.OK(c, gin.H{"ok": true})
}

// AdminListPets GET /api/admin/pets
func (h *Handler) AdminListPets(c *gin.Context) {
	var req adminListReq
	_ = c.ShouldBindQuery(&req)
	req.Normalize()
	pets, total, err := h.svc.ListPetsAdmin(req.Offset(), req.Limit())
	if err != nil {
		response.FailErr(c, err)
		return
	}
	response.OK(c, response.NewPage(pets, total, req.PageQuery))
}

// AdminListPosts GET /api/admin/posts
func (h *Handler) AdminListPosts(c *gin.Context) {
	var req adminListReq
	_ = c.ShouldBindQuery(&req)
	req.Normalize()
	posts, total, err := h.svc.ListPostsAdmin(req.Status, req.Offset(), req.Limit())
	if err != nil {
		response.FailErr(c, err)
		return
	}
	response.OK(c, response.NewPage(posts, total, req.PageQuery))
}

type postStatusReq struct {
	Status string `json:"status"`
}

// AdminSetPostStatus PUT /api/admin/posts/:id/status
func (h *Handler) AdminSetPostStatus(c *gin.Context) {
	var req postStatusReq
	if err := c.ShouldBindJSON(&req); err != nil {
		response.FailParams(c, err.Error())
		return
	}
	if err := h.svc.SetPostStatus(idParam(c, "id"), req.Status); err != nil {
		respondErr(c, err)
		return
	}
	response.OK(c, gin.H{"ok": true})
}

// AdminListComments GET /api/admin/comments
func (h *Handler) AdminListComments(c *gin.Context) {
	var req adminListReq
	_ = c.ShouldBindQuery(&req)
	req.Normalize()
	comments, total, err := h.svc.ListCommentsAdmin(req.Offset(), req.Limit())
	if err != nil {
		response.FailErr(c, err)
		return
	}
	response.OK(c, response.NewPage(comments, total, req.PageQuery))
}

// AdminDeleteComment DELETE /api/admin/comments/:id
func (h *Handler) AdminDeleteComment(c *gin.Context) {
	if err := h.svc.DeleteCommentAdmin(idParam(c, "id")); err != nil {
		response.FailErr(c, err)
		return
	}
	response.OK(c, gin.H{"ok": true})
}

// AdminListArticles GET /api/admin/articles
func (h *Handler) AdminListArticles(c *gin.Context) {
	var req adminListReq
	_ = c.ShouldBindQuery(&req)
	req.Normalize()
	articles, total, err := h.svc.ListArticlesAdmin(req.Offset(), req.Limit())
	if err != nil {
		response.FailErr(c, err)
		return
	}
	response.OK(c, response.NewPage(articles, total, req.PageQuery))
}

type articleReq struct {
	ID               string `json:"id"`
	Icon             string `json:"icon"`
	Title            string `json:"title"`
	Description      string `json:"description"`
	Content          string `json:"content"`
	Category         string `json:"category"`
	RelatedSheetType string `json:"related_sheet_type"`
	Published        bool   `json:"published"`
}

// AdminSaveArticle POST /api/admin/articles（id>0 为更新）
func (h *Handler) AdminSaveArticle(c *gin.Context) {
	var req articleReq
	if err := c.ShouldBindJSON(&req); err != nil {
		response.FailParams(c, err.Error())
		return
	}
	article := &model.Article{
		Icon: req.Icon, Title: req.Title, Description: req.Description, Content: req.Content,
		Category: req.Category, RelatedSheetType: req.RelatedSheetType, Published: req.Published,
	}
	article.ID = req.ID
	if err := h.svc.SaveArticle(article); err != nil {
		response.FailErr(c, err)
		return
	}
	response.OK(c, article)
}

// AdminDeleteArticle DELETE /api/admin/articles/:id
func (h *Handler) AdminDeleteArticle(c *gin.Context) {
	if err := h.svc.DeleteArticle(idParam(c, "id")); err != nil {
		respondErr(c, err)
		return
	}
	response.OK(c, gin.H{"ok": true})
}

// AdminListPro GET /api/admin/memberships
func (h *Handler) AdminListPro(c *gin.Context) {
	var req adminListReq
	_ = c.ShouldBindQuery(&req)
	req.Normalize()
	list, total, err := h.svc.ListProAdmin(req.Offset(), req.Limit())
	if err != nil {
		response.FailErr(c, err)
		return
	}
	response.OK(c, response.NewPage(list, total, req.PageQuery))
}

// AdminCareTemplateMeta GET /api/admin/care-templates/meta
// 给后台下拉用：物种、阶段、可选关联记录/弹层类型、提醒类型
func (h *Handler) AdminCareTemplateMeta(c *gin.Context) {
	response.OK(c, gin.H{
		"species": []gin.H{
			{"key": model.SpeciesCat, "label": "猫猫"},
			{"key": model.SpeciesDog, "label": "狗狗"},
		},
		"stages":         service.CareStages,
		"task_sheets":    []string{"", "weight", "poop", "food", "symptom", "vaccine", "medicine"},
		"plan_sheets":    []string{"", "weight", "vaccine", "medicine", "report", "taskDetail"},
		"reminder_types": []string{"vaccine", "deworm", "weight", "monthlyReport"},
		"priorities":     []string{"", "重要"},
	})
}

// AdminGetCareTemplate GET /api/admin/care-templates?species=&stage=
func (h *Handler) AdminGetCareTemplate(c *gin.Context) {
	data, err := h.svc.GetCareTemplate(c.Query("species"), c.Query("stage"))
	if err != nil {
		response.FailParams(c, err.Error())
		return
	}
	response.OK(c, data)
}

type careTemplateReq struct {
	Species string                   `json:"species"`
	Stage   string                   `json:"stage"`
	Items   []model.CareTemplateItem `json:"items"`
}

// AdminSaveCareTemplate PUT /api/admin/care-templates
func (h *Handler) AdminSaveCareTemplate(c *gin.Context) {
	var req careTemplateReq
	if err := c.ShouldBindJSON(&req); err != nil {
		response.FailParams(c, err.Error())
		return
	}
	if err := h.svc.SaveCareTemplate(req.Species, req.Stage, req.Items); err != nil {
		response.FailErr(c, err)
		return
	}
	data, _ := h.svc.GetCareTemplate(req.Species, req.Stage)
	response.OK(c, data)
}

type careGenReq struct {
	Species string `json:"species"`
	Stage   string `json:"stage"`
}

// AdminGenerateCareTemplate POST /api/admin/care-templates/generate
// AI 生成草稿（不落库），未开启 AI 时回退内置默认
func (h *Handler) AdminGenerateCareTemplate(c *gin.Context) {
	var req careGenReq
	if err := c.ShouldBindJSON(&req); err != nil {
		response.FailParams(c, err.Error())
		return
	}
	items, err := h.svc.GenerateCareTemplate(req.Species, req.Stage)
	if err != nil {
		response.FailParams(c, err.Error())
		return
	}
	response.OK(c, gin.H{"species": req.Species, "stage": req.Stage, "items": items})
}

// AdminGetCommunityBot GET /api/admin/community-bot
func (h *Handler) AdminGetCommunityBot(c *gin.Context) {
	response.OK(c, h.svc.GetCommunityBotConfig())
}

// AdminSaveCommunityBot PUT /api/admin/community-bot
func (h *Handler) AdminSaveCommunityBot(c *gin.Context) {
	var req model.CommunityBotConfig
	if err := c.ShouldBindJSON(&req); err != nil {
		response.FailParams(c, err.Error())
		return
	}
	saved, err := h.svc.SaveCommunityBotConfig(req)
	if err != nil {
		response.FailErr(c, err)
		return
	}
	response.OK(c, saved)
}

type communityGenReq struct {
	Count int `json:"count"`
}

// AdminGenerateCommunityPosts POST /api/admin/community-bot/generate
func (h *Handler) AdminGenerateCommunityPosts(c *gin.Context) {
	var req communityGenReq
	if err := c.ShouldBindJSON(&req); err != nil {
		response.FailParams(c, err.Error())
		return
	}
	if req.Count <= 0 {
		req.Count = 1
	}
	if req.Count > 30 {
		req.Count = 30
	}
	made, err := h.svc.GenerateCommunityPosts(req.Count)
	if err != nil {
		response.FailErr(c, err)
		return
	}
	response.OK(c, gin.H{"made": made})
}

// AdminGetAIQuota GET /api/admin/ai-quota
func (h *Handler) AdminGetAIQuota(c *gin.Context) {
	response.OK(c, h.svc.GetAIQuotaConfig())
}

// AdminSaveAIQuota PUT /api/admin/ai-quota
func (h *Handler) AdminSaveAIQuota(c *gin.Context) {
	var req model.AIQuotaConfig
	if err := c.ShouldBindJSON(&req); err != nil {
		response.FailParams(c, err.Error())
		return
	}
	cfg, err := h.svc.SaveAIQuotaConfig(req)
	if err != nil {
		response.FailErr(c, err)
		return
	}
	response.OK(c, cfg)
}