// @ts-check
const path = require('path');
const fs = require('fs');
const { execSync } = require('child_process');

/**
 * Resolve the Grav user directory.
 *
 * Resolution order:
 *  1. GRAV_USER_DIR env var (set in .env or shell)
 *  2. docker inspect the running intotheeast_grav container
 *  3. Sibling `user/` directory (worktree fallback)
 */
function resolveUserDir() {
    if (process.env.GRAV_USER_DIR) {
        return process.env.GRAV_USER_DIR;
    }
    try {
        const raw = execSync(
            "docker inspect intotheeast_grav --format '{{range .Mounts}}{{if eq .Destination \"/var/www/html/user\"}}{{.Source}}{{end}}{{end}}'",
            { encoding: 'utf-8', stdio: ['pipe', 'pipe', 'ignore'] }
        ).trim();
        if (raw) return raw;
    } catch (_) {
        // docker not available or container not running
    }
    return path.join(__dirname, '../../user');
}

/**
 * Resolve the active dailies directory from the post-form.md pageconfig.
 *
 * The post form stores `pageconfig.parent` as a Grav route such as
 * `/trips/italy-2026-demo/dailies`.  We map that to the filesystem by
 * scanning for a folder whose name ends with the trip slug.
 */
function resolveDailiesDir(userDir) {
    const postFormPath = path.join(userDir, 'pages/02.post/post-form.md');
    if (!fs.existsSync(postFormPath)) {
        // fallback: search all trips for a dailies dir
        return null;
    }
    const content = fs.readFileSync(postFormPath, 'utf-8');
    const m = content.match(/parent:\s*['"]?\/trips\/([^/'"]+)\/dailies/);
    if (!m) return null;
    const tripSlug = m[1];

    const tripsBase = path.join(userDir, 'pages/01.trips');
    if (!fs.existsSync(tripsBase)) return null;

    const tripFolder = fs.readdirSync(tripsBase).find(f => f === tripSlug || f.endsWith('.' + tripSlug) || f.includes(tripSlug));
    if (!tripFolder) return null;

    const dailiesBase = path.join(tripsBase, tripFolder);
    const dailiesFolder = fs.readdirSync(dailiesBase).find(f => f === 'dailies' || f === '01.dailies' || f.endsWith('.dailies'));
    if (!dailiesFolder) return null;

    return path.join(dailiesBase, dailiesFolder);
}

const USER_DIR = resolveUserDir();
const TRACKER_DIR = resolveDailiesDir(USER_DIR) || path.join(USER_DIR, 'pages/01.trips/italy-2026-demo/01.dailies');

/**
 * The Grav route to the active dailies listing page,
 * read from the post-form.md pageconfig.parent value.
 * Falls back to '/trips/italy-2026-demo/dailies'.
 */
function resolveActiveDailiesUrl() {
    const postFormPath = path.join(USER_DIR, 'pages/02.post/post-form.md');
    if (!fs.existsSync(postFormPath)) return '/trips/italy-2026-demo/dailies';
    const content = fs.readFileSync(postFormPath, 'utf-8');
    const m = content.match(/parent:\s*['"]?(\/trips\/[^'"]+\/dailies)['"]?/);
    return m ? m[1] : '/trips/italy-2026-demo/dailies';
}

const DAILIES_URL = resolveActiveDailiesUrl();

/**
 * Wait for all filepond items to finish XHR upload.
 */
async function waitForFilePondUpload(page) {
    await page.waitForFunction(() => {
        const items = document.querySelectorAll('.filepond--item[data-filepond-item-state]');
        return items.length > 0 && [...items].every(
            el => el.getAttribute('data-filepond-item-state') === 'processing-complete'
        );
    }, { timeout: 20_000 });
}

/**
 * Submit the post form with minimal required fields and return the unique title marker.
 * Caller is responsible for cleanup via cleanupEntry().
 */
async function postEntry(page, { titleTag, content = 'Automated test. Safe to delete.', city = '', country = '' } = {}) {
    const title = `UI Test ${titleTag} ${Date.now()}`;
    await page.goto('/post');
    await page.fill('input[name="data[title]"]', title);
    await page.fill('textarea[name="data[content]"]', content);
    if (city) await page.fill('input[name="data[location_city]"]', city);
    if (country) await page.fill('input[name="data[location_country]"]', country);
    await page.locator('.btn-post').evaluate(el => el.click());
    await page.waitForSelector('.form-messages, .notices', { timeout: 15_000 });
    return titleTag;
}

/**
 * Find a tracker entry folder by a unique slug fragment, then delete it.
 */
function cleanupEntry(slugFragment) {
    if (!slugFragment) return;
    if (!fs.existsSync(TRACKER_DIR)) return;
    const entries = fs.readdirSync(TRACKER_DIR);
    const match = entries.find(e => e.includes(slugFragment));
    if (match) {
        fs.rmSync(path.join(TRACKER_DIR, match), { recursive: true });
    }
}

/**
 * Find the first entry folder matching a slug fragment and return its full path.
 */
function findEntry(slugFragment) {
    if (!fs.existsSync(TRACKER_DIR)) return null;
    const entries = fs.readdirSync(TRACKER_DIR);
    const match = entries.find(e => e.includes(slugFragment));
    return match ? path.join(TRACKER_DIR, match) : null;
}

/**
 * Read the entry .md file (entry.md or entry.en.md) from an entry folder.
 */
function readEntryMd(entryDir) {
    const name = ['entry.md', 'entry.en.md'].find(f => fs.existsSync(path.join(entryDir, f)));
    if (!name) return null;
    return fs.readFileSync(path.join(entryDir, name), 'utf-8');
}

module.exports = { waitForFilePondUpload, postEntry, cleanupEntry, findEntry, readEntryMd, TRACKER_DIR, DAILIES_URL };