// visionA Local — splash / bootstrap
// 職責：顯示 app 啟動進度 → server 就緒後跳轉到 Next.js 主 UI

import { GetServerStatus, GetServerURL, GetBootstrapStatus } from './wailsjs/go/main/App.js';

const statusEl = document.getElementById('status');
const errorEl = document.getElementById('error');

const POLL_INTERVAL_MS = 400;
// 首次啟動最長容忍時間：venv 解壓(10s) + 建 venv(5s) + pip install wheels(30-60s) +
// libwdi driver install with UAC(15-30s) + server spawn(3s) + health check(2s) ≈ 60-110s
// 給到 240 秒以涵蓋慢速硬碟 / UAC 被使用者拖延的情況
const MAX_WAIT_MS = 240_000;
const startTime = Date.now();

let lastStatus = '';

async function poll() {
    const elapsed = Date.now() - startTime;
    if (elapsed > MAX_WAIT_MS) {
        showError(
            `啟動逾時（${Math.round(MAX_WAIT_MS / 1000)} 秒）。\n` +
            '請關閉此視窗並重新啟動應用程式，或查看 log：\n' +
            '%APPDATA%\\visiona-local\\logs\\wails.log'
        );
        return;
    }

    try {
        // 先更新 bootstrap 進度文字（venv / pip / driver / server...）
        const bootstrapMsg = await GetBootstrapStatus();
        if (bootstrapMsg && bootstrapMsg !== lastStatus) {
            statusEl.textContent = bootstrapMsg;
            lastStatus = bootstrapMsg;
        }

        // 檢查 server 是否已就緒
        const status = await GetServerStatus();
        if (status && status.lastError) {
            showError('伺服器啟動失敗：' + status.lastError);
            return;
        }
        if (status && status.running && status.url) {
            statusEl.textContent = '載入主介面...';
            window.location.replace(status.url + '/');
            return;
        }

        // 備用：直接問 URL
        const url = await GetServerURL();
        if (url) {
            statusEl.textContent = '載入主介面...';
            window.location.replace(url + '/');
            return;
        }
    } catch (e) {
        // binding 尚未就緒時會 throw，繼續輪詢
    }

    setTimeout(poll, POLL_INTERVAL_MS);
}

function showError(msg) {
    statusEl.hidden = true;
    errorEl.textContent = msg;
    errorEl.hidden = false;
}

// 等 Wails runtime 就緒再開始輪詢
if (window.runtime) {
    poll();
} else {
    window.addEventListener('load', () => setTimeout(poll, 200));
}