import {
    collectCurrentProduct,
    supportedProductPlatform,
} from '../lib/source-parsers.js';
import type { OzonPageJsonFetcher } from '../lib/ozon-parser.js';

export default defineContentScript({
    matches: [
        '*://www.ozon.ru/*',
        '*://www.ozon.kz/*',
        '*://www.ozon.by/*',
        '*://detail.1688.com/*',
        '*://item.taobao.com/*',
        '*://detail.tmall.com/*',
    ],
    runAt: 'document_idle',
    main() {
        let mount: HTMLDivElement | null = null;
        let shadow: ShadowRoot | null = null;
        let observedUrl = location.href;

        const render = async () => {
            if (!supportedProductPlatform()) {
                mount?.remove();
                mount = null;
                shadow = null;
                return;
            }
            if (!mount) {
                mount = document.createElement('div');
                mount.style.cssText =
                    'position:fixed;right:22px;bottom:80px;z-index:2147483647';
                document.documentElement.append(mount);
                shadow = mount.attachShadow({ mode: 'open' });
            }
            const root = shadow!;
            const session = await browser.runtime
                .sendMessage({ type: 'atlas.session' })
                .then((value: { session?: unknown }) => value.session)
                .catch(() => null);
            root.innerHTML = `<style>:host{all:initial}.box{width:156px;padding:12px;background:#fff;border-radius:12px;box-shadow:0 8px 28px #0003;font:14px -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#1f2937}.head{display:flex;justify-content:space-between;align-items:center;font-weight:700;margin-bottom:10px}.dot{width:9px;height:9px;border-radius:50%;background:#ffd43b;border:0}.btn{display:block;width:100%;border:0;border-radius:18px;padding:9px 8px;margin:7px 0;background:#2878f0;color:#fff;font-weight:600;cursor:pointer}.btn.primary{background:#ff5353}.link{display:block;width:100%;border:0;background:transparent;color:#1668dc;cursor:pointer;padding:5px}.hint{font-size:12px;color:#6b7280;text-align:center;margin-top:6px}</style><div class="box"><div class="head"><span>Atlas ERP</span><button class="dot" aria-label="收起"></button></div>${session ? '<button class="btn primary" data-action="edit">编辑上架</button><button class="btn" data-action="collect">采集商品</button><button class="link" data-action="erp">进入 ERP</button>' : '<button class="btn primary" data-action="login">登录 Atlas ERP</button>'}<div class="hint" data-hint></div></div>`;
            root.querySelector('.dot')?.addEventListener('click', () => {
                mount?.remove();
                mount = null;
                shadow = null;
            });
            root.querySelectorAll<HTMLButtonElement>('[data-action]').forEach(
                (button) =>
                    button.addEventListener('click', () =>
                        void action(button.dataset.action ?? '', root),
                    ),
            );
        };

        const action = async (kind: string, root: ShadowRoot) => {
            const hint = root.querySelector<HTMLElement>('[data-hint]')!;
            try {
                if (kind === 'login') {
                    hint.textContent = '正在登录…';
                    await browser.runtime.sendMessage({ type: 'atlas.login' });
                    await render();
                    return;
                }
                if (kind === 'erp') {
                    await browser.runtime.sendMessage({ type: 'atlas.open', path: '/' });
                    return;
                }
                hint.textContent = '正在采集多 SKU…';
                const payload = await collectCurrentProduct(
                    document,
                    location.href,
                    supportedProductPlatform() === 'ozon'
                        ? requestOzonPageJson
                        : undefined,
                );
                const response = await browser.runtime.sendMessage({
                    type: 'atlas.collect',
                    payload,
                });
                if (kind === 'edit') {
                    await browser.runtime.sendMessage({
                        type: 'atlas.open',
                        path: response.result.data.editor_entry_path,
                    });
                }
                hint.textContent =
                    kind === 'edit' ? '已打开采集数据测试页' : '已进入采集箱';
            } catch (error) {
                hint.textContent =
                    error instanceof Error ? error.message : '采集失败，请重试';
            }
        };

        void render();
        setInterval(() => {
            if (location.href !== observedUrl) {
                observedUrl = location.href;
                void render();
            }
        }, 700);
    },
});

const requestOzonPageJson: OzonPageJsonFetcher = ({ kind, sku }) =>
    new Promise((resolve, reject) => {
        const requestId = crypto.randomUUID();
        const timeout = window.setTimeout(() => {
            window.removeEventListener('message', receive);
            reject(new Error('Ozon 页面状态读取超时'));
        }, 15_000);
        const receive = (event: MessageEvent<unknown>) => {
            if (event.source !== window || !isBridgeResponse(event.data, requestId)) return;
            window.clearTimeout(timeout);
            window.removeEventListener('message', receive);
            if (event.data.ok) resolve(event.data.data);
            else reject(new Error(event.data.error));
        };
        window.addEventListener('message', receive);
        window.postMessage(
            {
                source: 'atlas-collector',
                type: 'ozon-page-json.request',
                requestId,
                kind,
                sku,
            },
            location.origin,
        );
    });

function isBridgeResponse(
    value: unknown,
    requestId: string,
): value is {
    source: 'atlas-collector';
    type: 'ozon-page-json.response';
    requestId: string;
    ok: boolean;
    data?: unknown;
    error: string;
} {
    if (!value || typeof value !== 'object' || Array.isArray(value)) return false;
    const message = value as Record<string, unknown>;
    return (
        message.source === 'atlas-collector' &&
        message.type === 'ozon-page-json.response' &&
        message.requestId === requestId &&
        typeof message.ok === 'boolean' &&
        (message.ok || typeof message.error === 'string')
    );
}