import { useMemo, useState } from "react";
import { parseForm } from "@/shared/forms/validation";
import { useRegionOptions } from "@/shared/hooks/useRegionOptions.js";
import { usePaginatedQuery } from "@/shared/hooks/usePaginatedQuery.js";
import { useConfirm } from "@/shared/ui/ConfirmProvider.jsx";
import { useToast } from "@/shared/ui/ToastProvider.jsx";
import { deleteRoom, listRooms, updateRoom } from "@/features/rooms/api";
import { useRoomAbilities } from "@/features/rooms/permissions.js";
import { roomStatusSchema, roomUpdateSchema } from "@/features/rooms/schema";

const pageSize = 10;
const emptyData = { items: [], page: 1, pageSize, total: 0 };
const emptyForm = () => ({
    coverUrl: "",
    description: "",
    title: "",
    visibleRegionId: 0,
});
const emptyStatusForm = () => ({ status: "active" });

export function useRoomsPage() {
    const abilities = useRoomAbilities();
    const confirm = useConfirm();
    const { showToast } = useToast();
    const { loadingRegions, regionOptions } = useRegionOptions();
    const [query, setQuery] = useState("");
    const [status, setStatus] = useState("");
    const [regionId, setRegionId] = useState("");
    const [page, setPage] = useState(1);
    const [activeAction, setActiveAction] = useState("");
    const [activeRoom, setActiveRoom] = useState(null);
    const [form, setForm] = useState(emptyForm);
    const [statusForm, setStatusForm] = useState(emptyStatusForm);
    const [loadingAction, setLoadingAction] = useState("");
    const filters = useMemo(
        () => ({
            keyword: query,
            region_id: regionId,
            status,
        }),
        [query, regionId, status],
    );
    const {
        data = emptyData,
        error,
        loading,
        reload,
    } = usePaginatedQuery({
        errorMessage: "加载房间列表失败",
        fetcher: listRooms,
        filters,
        page,
        pageSize,
        queryKey: ["rooms", filters, page],
    });

    const changeQuery = (value) => {
        setQuery(value);
        setPage(1);
    };

    const changeStatus = (value) => {
        setStatus(value);
        setPage(1);
    };

    const changeRegionId = (value) => {
        setRegionId(value);
        setPage(1);
    };

    const resetFilters = () => {
        setQuery("");
        setStatus("");
        setRegionId("");
        setPage(1);
    };

    const openEdit = (room) => {
        setActiveRoom(room);
        setForm({
            coverUrl: room.coverUrl || "",
            description: "",
            title: room.title || "",
            visibleRegionId: room.visibleRegionId || 0,
        });
        setActiveAction("edit");
    };

    const openDetail = (room) => {
        setActiveRoom(room);
        setActiveAction("detail");
    };

    const openStatus = (room) => {
        setActiveRoom(room);
        setStatusForm({ status: room.status === "closed" ? "closed" : "active" });
        setActiveAction("status");
    };

    const closeAction = () => {
        setActiveAction("");
        setActiveRoom(null);
    };

    const submitEdit = async (event) => {
        event.preventDefault();
        if (!activeRoom) {
            return;
        }
        await runAction("edit", "房间已更新", async () => {
            const payload = parseForm(roomUpdateSchema, form);
            if (!String(form.description || "").trim()) {
                delete payload.description;
            }
            await updateRoom(activeRoom.roomId, payload);
            closeAction();
            await reload();
        });
    };

    const submitStatus = async (event) => {
        event.preventDefault();
        if (!activeRoom) {
            return;
        }
        await runAction("status", "房间状态已更新", async () => {
            const payload = parseForm(roomStatusSchema, statusForm);
            await updateRoom(activeRoom.roomId, payload);
            closeAction();
            await reload();
        });
    };

    const removeRoom = async (room) => {
        const ok = await confirm({
            confirmText: "删除",
            message: `${room.title || room.roomId} 会从房间列表和房间状态中删除。`,
            title: "删除房间",
            tone: "danger",
        });
        if (!ok) {
            return;
        }
        await runAction(`delete-${room.roomId}`, "房间已删除", async () => {
            await deleteRoom(room.roomId);
            await reload();
        });
    };

    const runAction = async (action, successMessage, submitter) => {
        setLoadingAction(action);
        try {
            await submitter();
            showToast(successMessage, "success");
        } catch (err) {
            showToast(err.message || "操作失败", "error");
        } finally {
            setLoadingAction("");
        }
    };

    return {
        abilities,
        activeAction,
        activeRoom,
        changeQuery,
        changeRegionId,
        changeStatus,
        closeAction,
        data,
        error,
        form,
        loading,
        loadingAction,
        loadingRegions,
        openDetail,
        openEdit,
        openStatus,
        page,
        query,
        regionId,
        regionOptions,
        reload,
        removeRoom,
        resetFilters,
        setForm,
        setPage,
        setStatusForm,
        status,
        statusForm,
        submitStatus,
        submitEdit,
    };
}