import { NAV_INNER_PX } from '../../utils/navMetrics';
import {
    HOME_CURRENT_CAPABILITY_DATA,
    type HomeDisplayItem,
    type HomeDisplaySection,
} from './home.data';

type AgeBandKey = string;

type HomeTab = {
    id: string;
    name: string;
};

type HomeAgeBandView = {
    key: string;
    label: string;
    desc: string;
    path: string;
    icon: string;
};

type HomeDisplayItemView = HomeDisplayItem & {
    topBg: string;
};

type HomeDisplaySectionView = HomeDisplaySection & {
    anchorId: string;
    items: HomeDisplayItemView[];
};

const AGE_BAND_ICONS = ['🌱', '🚀', '🎓', '🧠', '🏆'] as const;

const CATEGORY_TOP_BG: Record<HomeDisplayItem['category'], string> = {
    math: '#fff3c4',
    chinese: '#d8f0d0',
    english: '#e8f4ff',
    puzzle: '#f5e6dc',
    craft: '#fce4ec',
};

const SECTION_ANCHOR_PREFIX = 'section-';
const TAB_BAR_PATHS = new Set([
    '/pages/home/home',
    '/pages/age/age',
    '/pages/favorites/favorites',
    '/pages/profile/profile',
]);

function toItemView(item: HomeDisplayItem): HomeDisplayItemView {
    return {
        ...item,
        topBg: CATEGORY_TOP_BG[item.category],
    };
}

function sortSectionsByTabs(
    tabs: readonly { id: string }[],
    sections: HomeDisplaySection[],
): HomeDisplaySectionView[] {
    const orderMap = tabs.reduce<Record<string, number>>((acc, tab, index) => {
        acc[tab.id] = index;
        return acc;
    }, {});

    return [...sections]
        .sort((a, b) => {
            const aOrder = orderMap[a.id];
            const bOrder = orderMap[b.id];
            // 注意：0 需要保留（不能用 || 进行兜底）
            return (aOrder ?? 999) - (bOrder ?? 999);
        })
        .map((section) => ({
            ...section,
            anchorId: `${SECTION_ANCHOR_PREFIX}${section.id}`,
            items: section.items.map(toItemView),
        }));
}

function navigateByPath(path?: string, fallbackTitle?: string) {
    if (!path) {
        wx.showToast({
            title: fallbackTitle ? `${fallbackTitle} 即将上线` : '即将上线',
            icon: 'none',
        });
        return;
    }

    if (TAB_BAR_PATHS.has(path)) {
        wx.switchTab({ url: path });
        return;
    }

    wx.navigateTo({ url: path });
}

const win = wx.getWindowInfo();
const HOME_DATA = HOME_CURRENT_CAPABILITY_DATA;
const HOME_TABS: HomeTab[] = HOME_DATA.categoryTabs.map((item) => ({
    id: item.id,
    name: item.name,
}));
const HOME_SECTIONS = sortSectionsByTabs(HOME_TABS, HOME_DATA.sections);
console.log('HOME_DATA', HOME_DATA);
console.log('HOME_SECTIONS', HOME_SECTIONS);

Page({
    data: {
        statusBarHeight: win.statusBarHeight,
        navBlockHeight: win.statusBarHeight + NAV_INNER_PX,
        searchPlaceholder: HOME_DATA.searchPlaceholder,
        tabs: HOME_TABS,
        activeTab: 'all',
        ageBands: HOME_DATA.ageBands.map((item, idx) => ({
            ...item,
            icon: AGE_BAND_ICONS[idx] || '🌟',
        })) as HomeAgeBandView[],
        activeAgeBand: HOME_DATA.ageBands[0]?.key || ('3-4' as AgeBandKey),
        featuredItems: HOME_DATA.featured.map(toItemView),
        hotRecommends: HOME_DATA.hot.map(toItemView),
        sections: HOME_SECTIONS,
    },

    onTabChange(e: WechatMiniprogram.CustomEvent) {
        const id = e.detail.id as string | undefined;
        if (!id) return;

        this.setData({ activeTab: id });

        if (id === 'all') {
            wx.pageScrollTo({
                scrollTop: 0,
                duration: 400,
            });
            return;
        }

        wx.pageScrollTo({
            selector: `#${SECTION_ANCHOR_PREFIX}${id}`,
            duration: 400,
            offsetTop: -(win.statusBarHeight + NAV_INNER_PX + 24),
        });
    },

    onTapAgeBand(e: WechatMiniprogram.TouchEvent) {
        const key = e.currentTarget.dataset.key as AgeBandKey | undefined;
        const path = e.currentTarget.dataset.path as string | undefined;
        if (!key) return;
        this.setData({ activeAgeBand: key });
        navigateByPath(path, '分龄内容');
    },

    onTapFeatured(e: WechatMiniprogram.TouchEvent) {
        const path = e.currentTarget.dataset.path as string | undefined;
        const title = e.currentTarget.dataset.title as string | undefined;
        navigateByPath(path, title);
    },

    onTapHotRecommend(e: WechatMiniprogram.TouchEvent) {
        const path = e.currentTarget.dataset.path as string | undefined;
        const title = e.currentTarget.dataset.title as string | undefined;
        navigateByPath(path, title);
    },

    onTapAgeMore() {
        wx.switchTab({ url: '/pages/age/age' });
    },

    onTapHotMore() {
        wx.showToast({ title: '热门内容整理中', icon: 'none' });
    },

    onTapTrackMore(e: WechatMiniprogram.TouchEvent) {
        const path = e.currentTarget.dataset.path as string | undefined;
        const title = e.currentTarget.dataset.title as string | undefined;
        navigateByPath(path, title);
    },

    onTapTrackCard(e: WechatMiniprogram.TouchEvent) {
        const path = e.currentTarget.dataset.path as string | undefined;
        const title = e.currentTarget.dataset.title as string | undefined;
        navigateByPath(path, title);
    },

    onShareAppMessage() {
        return {
            title: '涂鸦丫 - 快来生成宝宝的专属学习卡',
            path: '/pages/home/home',
            imageUrl:
                'https://cdn.joeyone.cn/doodle/share-img/index-share-v2.png',
        };
    },

    onShareTimeline() {
        return {
            title: '涂鸦丫 - 快来生成宝宝的专属学习卡',
            query: '',
        };
    },
});