// src/hooks/useWatchlist.js
// 自选股管理自定义 Hook

import { useState, useCallback } from 'react';
import { useToast } from '@chakra-ui/react';
import { logger } from '../utils/logger';
import { getApiBase } from '../utils/apiConfig';

const WATCHLIST_PAGE_SIZE = 10;

/**
 * 自选股管理 Hook
 * 提供自选股加载、分页、添加、移除等功能
 *
 * @returns {{
 *   watchlistQuotes: Array,
 *   watchlistLoading: boolean,
 *   watchlistPage: number,
 *   setWatchlistPage: Function,
 *   WATCHLIST_PAGE_SIZE: number,
 *   loadWatchlistQuotes: Function,
 *   handleAddToWatchlist: Function,
 *   handleRemoveFromWatchlist: Function,
 *   isInWatchlist: Function
 * }}
 */
export const useWatchlist = () => {
    const toast = useToast();
    const [watchlistQuotes, setWatchlistQuotes] = useState([]);
    const [watchlistLoading, setWatchlistLoading] = useState(false);
    const [watchlistPage, setWatchlistPage] = useState(1);

    // 加载自选股实时行情
    const loadWatchlistQuotes = useCallback(async () => {
        try {
            setWatchlistLoading(true);
            const base = getApiBase();
            const resp = await fetch(base + '/api/account/watchlist/realtime', {
                credentials: 'include',
                cache: 'no-store',
                headers: { 'Cache-Control': 'no-cache' }
            });
            if (resp.ok) {
                const data = await resp.json();
                if (data && data.success && Array.isArray(data.data)) {
                    setWatchlistQuotes(data.data);
                } else {
                    setWatchlistQuotes([]);
                }
            } else {
                setWatchlistQuotes([]);
            }
        } catch (e) {
            logger.warn('useWatchlist', '加载自选股实时行情失败', {
                error: e.message
            });
            setWatchlistQuotes([]);
        } finally {
            setWatchlistLoading(false);
        }
    }, []);

    // 添加到自选股
    const handleAddToWatchlist = useCallback(async (stockCode, stockName) => {
        try {
            const base = getApiBase();
            const resp = await fetch(base + '/api/account/watchlist/add', {
                method: 'POST',
                credentials: 'include',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({ stock_code: stockCode, stock_name: stockName })
            });
            const data = await resp.json().catch(() => ({}));
            if (resp.ok && data.success) {
                // 刷新自选股列表
                loadWatchlistQuotes();
                toast({ title: '已添加至自选股', status: 'success', duration: 1500 });
                return true;
            } else {
                toast({ title: '添加失败', status: 'error', duration: 2000 });
                return false;
            }
        } catch (e) {
            toast({ title: '网络错误，添加失败', status: 'error', duration: 2000 });
            return false;
        }
    }, [toast, loadWatchlistQuotes]);

    // 从自选股移除
    const handleRemoveFromWatchlist = useCallback(async (stockCode) => {
        try {
            const base = getApiBase();
            const resp = await fetch(base + `/api/account/watchlist/${stockCode}`, {
                method: 'DELETE',
                credentials: 'include'
            });
            const data = await resp.json().catch(() => ({}));
            if (resp.ok && data && data.success !== false) {
                setWatchlistQuotes((prev) => {
                    const normalize6 = (code) => {
                        const m = String(code || '').match(/(\d{6})/);
                        return m ? m[1] : String(code || '');
                    };
                    const target = normalize6(stockCode);
                    const updated = (prev || []).filter((x) => normalize6(x.stock_code) !== target);
                    const newMaxPage = Math.max(1, Math.ceil((updated.length || 0) / WATCHLIST_PAGE_SIZE));
                    setWatchlistPage((p) => Math.min(p, newMaxPage));
                    return updated;
                });
                toast({ title: '已从自选股移除', status: 'info', duration: 1500 });
            } else {
                toast({ title: '移除失败', status: 'error', duration: 2000 });
            }
        } catch (e) {
            toast({ title: '网络错误，移除失败', status: 'error', duration: 2000 });
            return false;
        }
    }, [toast]);

    // 判断股票是否在自选股中
    const isInWatchlist = useCallback((stockCode) => {
        const normalize6 = (code) => {
            const m = String(code || '').match(/(\d{6})/);
            return m ? m[1] : String(code || '');
        };
        const target = normalize6(stockCode);
        return watchlistQuotes.some(item => normalize6(item.stock_code) === target);
    }, [watchlistQuotes]);

    return {
        watchlistQuotes,
        watchlistLoading,
        watchlistPage,
        setWatchlistPage,
        WATCHLIST_PAGE_SIZE,
        loadWatchlistQuotes,
        handleAddToWatchlist,
        handleRemoveFromWatchlist,
        isInWatchlist
    };
};