package workbench

import (
	"net/http"
	"strconv"

	"aigateway.local/core/internal/identity"
	"aigateway.local/core/internal/platform/apiresponse"
)

// InboxPortalHTTPHandler 向门户端暴露个人收件箱与未读徽标。
type InboxPortalHTTPHandler struct {
	inbox    *InboxService
	identity *identity.Service
	mux      *http.ServeMux
}

func NewInboxPortalHTTPHandler(inbox *InboxService, identityService *identity.Service) *InboxPortalHTTPHandler {
	h := &InboxPortalHTTPHandler{inbox: inbox, identity: identityService, mux: http.NewServeMux()}
	h.mux.HandleFunc("GET /api/v1/portal/inbox", h.list)
	h.mux.HandleFunc("GET /api/v1/portal/inbox/unread", h.unread)
	h.mux.HandleFunc("POST /api/v1/portal/inbox/read-all", h.readAll)
	h.mux.HandleFunc("POST /api/v1/portal/inbox/{id}/read", h.read)
	return h
}

func (h *InboxPortalHTTPHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) { h.mux.ServeHTTP(w, r) }

func (h *InboxPortalHTTPHandler) account(w http.ResponseWriter, r *http.Request) (identity.Account, bool) {
	account, err := h.identity.Authenticate(r.Context(), identity.KindPortal, r.Header.Get("Authorization"))
	if err != nil {
		apiresponse.Error(w, http.StatusUnauthorized, "登录状态无效或已过期")
		return identity.Account{}, false
	}
	return account, true
}

func (h *InboxPortalHTTPHandler) list(w http.ResponseWriter, r *http.Request) {
	a, ok := h.account(w, r)
	if !ok {
		return
	}
	limit, _ := strconv.Atoi(r.URL.Query().Get("limit"))
	items, err := h.inbox.List(r.Context(), "portal", a.ID, limit)
	if err != nil {
		apiresponse.Error(w, http.StatusBadRequest, err.Error())
		return
	}
	apiresponse.OK(w, items)
}

func (h *InboxPortalHTTPHandler) unread(w http.ResponseWriter, r *http.Request) {
	a, ok := h.account(w, r)
	if !ok {
		return
	}
	count, err := h.inbox.UnreadCount(r.Context(), "portal", a.ID)
	if err != nil {
		apiresponse.Error(w, http.StatusBadRequest, err.Error())
		return
	}
	apiresponse.OK(w, map[string]int{"unread": count})
}

func (h *InboxPortalHTTPHandler) read(w http.ResponseWriter, r *http.Request) {
	a, ok := h.account(w, r)
	if !ok {
		return
	}
	changed, err := h.inbox.MarkRead(r.Context(), r.PathValue("id"), "portal", a.ID)
	if err != nil {
		apiresponse.Error(w, http.StatusBadRequest, err.Error())
		return
	}
	apiresponse.OK(w, map[string]bool{"read": changed})
}

func (h *InboxPortalHTTPHandler) readAll(w http.ResponseWriter, r *http.Request) {
	a, ok := h.account(w, r)
	if !ok {
		return
	}
	count, err := h.inbox.MarkAllRead(r.Context(), "portal", a.ID)
	if err != nil {
		apiresponse.Error(w, http.StatusBadRequest, err.Error())
		return
	}
	apiresponse.OK(w, map[string]any{"read_all": count})
}