import { test, expect } from '@playwright/test';
import { MOCK_FS_INIT_SCRIPT } from './fixtures/mock-fs-api.js';
import * as path from 'path';
import * as fs from 'fs/promises';

const HTML_PATH = path.resolve('browse/dist/browse.html');

test.describe('Browse', () => {
    test.beforeEach(async ({ page }) => {
        await page.addInitScript(MOCK_FS_INIT_SCRIPT);
    });

    test('loads with the empty state visible and add-directory button enabled', async ({ page }) => {
        await page.goto(`file://${HTML_PATH}`, { waitUntil: 'load' });
        await page.waitForSelector('#addDirectoryBtn', { timeout: 15000 });

        // file:// + no auto-server-root → the empty state is shown and the
        // browse table stays hidden until the user picks a directory.
        await expect(page.locator('#emptyState')).toBeVisible();
        await expect(page.locator('#browseRoot')).toBeHidden();

        const addDirBtn = page.locator('#addDirectoryBtn');
        await expect(addDirBtn).toBeVisible();
        await expect(addDirBtn).not.toBeDisabled();
    });

    test('renders rows from a mock directory after picking', async ({ page }) => {
        await page.goto(`file://${HTML_PATH}`, { waitUntil: 'load' });
        await page.waitForSelector('#addDirectoryBtn', { timeout: 15000 });

        await page.evaluate(() => {
            window.__setMockDirectory('docs', [
                { name: 'spec.pdf',    content: '%PDF-fixture',           size: 1024 },
                { name: 'readme.md',   content: '# Hello\n',              size: 8 },
                { name: 'notes.txt',   content: 'note one\nnote two\n',   size: 16 },
            ]);
        });

        await page.locator('#addDirectoryBtn').click();

        // Browse swaps from empty state to the two-pane layout. The
        // tree pane is on the left; rows are <div class="tree-row">.
        await page.waitForSelector('#browseRoot:not(.hidden)', { timeout: 10000 });
        await page.waitForFunction(
            () => document.querySelectorAll('#treeBody .tree-row').length >= 3,
            { timeout: 10000 }
        );

        const rows = await page.locator('#treeBody .tree-row').count();
        expect(rows).toBeGreaterThanOrEqual(3);

        // Right preview pane is present and starts in the empty state.
        await expect(page.locator('#previewPane')).toBeVisible();
        await expect(page.locator('#previewBody')).toContainText(/Click a file/);
    });

    test('clicking a file shows it in the preview pane', async ({ page }) => {
        await page.goto(`file://${HTML_PATH}`, { waitUntil: 'load' });
        await page.waitForSelector('#addDirectoryBtn', { timeout: 15000 });

        await page.evaluate(() => {
            window.__setMockDirectory('docs', [
                { name: 'notes.txt', content: 'hello world', size: 11 },
            ]);
        });
        await page.locator('#addDirectoryBtn').click();
        await page.waitForSelector('#treeBody .tree-row', { timeout: 10000 });

        // Click the file row.
        await page.locator('#treeBody .tree-row[data-isdir="false"]').first().click();

        // Preview title updates to the file name; pop-out button appears.
        await expect(page.locator('#previewTitle')).toHaveText(/notes\.txt/);
        await expect(page.locator('#previewPopout')).toBeVisible();
    });

    test('clicking a .md file mounts the markdown editor with a TOC', async ({ page }) => {
        await page.goto(`file://${HTML_PATH}`, { waitUntil: 'load' });
        await page.waitForSelector('#addDirectoryBtn', { timeout: 15000 });

        await page.evaluate(() => {
            window.__setMockDirectory('notes', [
                {
                    name: 'readme.md',
                    content: '# Title\n\nIntro.\n\n## Section One\n\nText.\n\n### Subsection\n\nDeeper.',
                    size: 100,
                },
            ]);
        });
        await page.locator('#addDirectoryBtn').click();
        await page.waitForSelector('#treeBody .tree-row[data-isdir="false"]', { timeout: 10000 });
        await page.locator('#treeBody .tree-row[data-isdir="false"]').first().click();

        // Markdown plugin DOM mounts: shell, sidebar (front matter +
        // TOC), content (info header + editor).
        await expect(page.locator('.md-shell')).toBeVisible({ timeout: 15000 });
        await expect(page.locator('.md-shell__sidebar')).toBeVisible();
        await expect(page.locator('.md-shell__infohdr')).toBeVisible();
        await expect(page.locator('.md-shell__editor')).toBeVisible();

        // Outline lists the three headings.
        await page.waitForSelector('.md-toc__list .md-toc__item', { timeout: 10000 });
        const tocItems = await page.locator('.md-toc__list .md-toc__item').allTextContents();
        expect(tocItems).toEqual(['Title', 'Section One', 'Subsection']);

        // Source hint reflects local FS-API mode.
        await expect(page.locator('.md-shell__source')).toHaveText(/local/i);
    });

    test('expands a .zip transmittal folder and previews a member', async ({ page }) => {
        await page.goto(`file://${HTML_PATH}`, { waitUntil: 'load' });
        await page.waitForSelector('#addDirectoryBtn', { timeout: 15000 });

        // Build a real zip in-browser (JSZip is bundled into browse.html)
        // and hand its bytes to the mock FS as a single .zip file whose
        // name parses as a transmittal folder.
        await page.evaluate(async () => {
            const zip = new window.JSZip();
            zip.file('DOC-001 (IFI) - Spec.pdf', '%PDF-1.4 fixture body');
            zip.file('sub/note.txt', 'a note inside the zip');
            const buf = await zip.generateAsync({ type: 'uint8array' });
            window.__setMockDirectory('PartyA', [
                { name: '2025-05-12_DOC-001 (IFI) - Title.zip', content: buf, size: buf.length },
            ]);
        });
        await page.locator('#addDirectoryBtn').click();
        await page.waitForSelector('#treeBody .tree-row[data-iszip="true"]', { timeout: 10000 });

        // Expand the .zip — it should list its members like a folder.
        await page.locator('#treeBody .tree-row[data-iszip="true"]').first().click();
        await page.waitForFunction(
            () => document.querySelectorAll('#treeBody .tree-row').length >= 3,
            { timeout: 10000 }
        );
        const labels = await page.locator('#treeBody .tree-name__label').allTextContents();
        expect(labels.join('|')).toContain('DOC-001 (IFI) - Spec.pdf');
        expect(labels.join('|')).toContain('sub');

        // Drill into the subdir, then preview the text member.
        await page.locator('#treeBody .tree-row[data-isdir="true"]').last().click();
        await page.waitForFunction(
            () => Array.from(document.querySelectorAll('#treeBody .tree-name__label'))
                .some(el => el.textContent === 'note.txt'),
            { timeout: 10000 }
        );
        const noteRow = page.locator('#treeBody .tree-row', { has: page.locator('.tree-name__label', { hasText: /^note\.txt$/ }) });
        await noteRow.click();
        await expect(page.locator('#previewTitle')).toHaveText(/note\.txt/);
        await expect(page.locator('#previewBody')).toContainText('a note inside the zip');
    });

    test('Download (zip) bundles a folder via right-click → Download ZIP', async ({ page }) => {
        await page.goto(`file://${HTML_PATH}`, { waitUntil: 'load' });
        await page.waitForSelector('#addDirectoryBtn', { timeout: 15000 });

        await page.evaluate(() => {
            window.__setMockDirectoryTree('mock-folder', {
                'a.txt': 'AAA',
                'sub': {
                    'b.txt': 'BBB',
                    'deep': { 'c.txt': 'CCC' },
                    '.zddc': 'acl: { permissions: { "*": r } }',   // hidden — must not be in the zip
                    '_template': { 'scaffold.txt': 'x' },          // hidden dir — must not be in the zip
                },
            });
        });
        await page.locator('#addDirectoryBtn').click();
        await page.waitForSelector('#browseRoot:not(.hidden)', { timeout: 10000 });

        // Download ZIP lives in the row's right-click context menu —
        // the standalone toolbar button was retired when the context
        // menu became the canonical action surface (SPA overhaul,
        // commit 94b2e29). The picked-root folder doesn't render as
        // a row (only its CONTENTS do), so we test the next-level
        // folder: right-click sub/, download sub.zip.
        const subRow = page.locator('.tree-row', { has: page.locator('.tree-name__label', { hasText: /^sub$/ }) });
        await subRow.waitFor({ state: 'visible', timeout: 5000 });
        const [download] = await Promise.all([
            page.waitForEvent('download'),
            (async () => {
                await subRow.click({ button: 'right' });
                await page.locator('.zddc-menu__item', { hasText: 'Download ZIP' })
                    .first()
                    .click();
            })(),
        ]);
        expect(download.suggestedFilename()).toBe('sub.zip');

        const file = await download.path();
        const buf = await fs.readFile(file);
        // Valid zip: starts with the local-file-header magic, non-trivial.
        expect(buf.length).toBeGreaterThan(50);
        expect(buf.subarray(0, 4)).toEqual(Buffer.from([0x50, 0x4b, 0x03, 0x04]));

        // Introspect the entries with the bundled JSZip (in-page).
        const b64 = buf.toString('base64');
        const entries = await page.evaluate(async (b64) => {
            const bin = atob(b64);
            const bytes = new Uint8Array(bin.length);
            for (let i = 0; i < bin.length; i++) bytes[i] = bin.charCodeAt(i);
            const z = await window.JSZip.loadAsync(bytes);
            return Object.keys(z.files).filter((n) => !z.files[n].dir).sort();
        }, b64);
        expect(entries).toEqual([
            'sub/b.txt',
            'sub/deep/c.txt',
        ]);
    });
});

// ── Menu harmonization: context-correct, capability/tier-driven ──────────
test.describe('Browse menu — context & tiers', () => {
    test.beforeEach(async ({ page }) => {
        await page.addInitScript(MOCK_FS_INIT_SCRIPT);
    });

    async function openWithTree(page) {
        await page.goto(`file://${HTML_PATH}`, { waitUntil: 'load' });
        await page.waitForSelector('#addDirectoryBtn', { timeout: 15000 });
        await page.evaluate(() => {
            window.__setMockDirectoryTree('mock-folder', {
                'a.txt': 'AAA',
                'sub': { 'b.txt': 'BBB' },
            });
        });
        await page.locator('#addDirectoryBtn').click();
        await page.waitForSelector('#browseRoot:not(.hidden)', { timeout: 10000 });
    }

    test('file row OMITS New folder / New file (context-correct)', async ({ page }) => {
        await openWithTree(page);
        const fileRow = page.locator('.tree-row', { has: page.locator('.tree-name__label', { hasText: /^a\.txt$/ }) });
        await fileRow.click({ button: 'right' });
        await page.waitForSelector('.zddc-menu', { timeout: 5000 });
        await expect(page.locator('.zddc-menu__item', { hasText: 'New folder' })).toHaveCount(0);
        await expect(page.locator('.zddc-menu__item', { hasText: 'New file' })).toHaveCount(0);
        // Copy path/name removed; Navigate into folded into Open.
        await expect(page.locator('.zddc-menu__item', { hasText: 'Copy path' })).toHaveCount(0);
        await expect(page.locator('.zddc-menu__item', { hasText: 'Navigate into' })).toHaveCount(0);
    });

    test('folder row SHOWS New folder (FS mode → create permitted), enabled', async ({ page }) => {
        await openWithTree(page);
        const folderRow = page.locator('.tree-row', { has: page.locator('.tree-name__label', { hasText: /^sub$/ }) });
        await folderRow.click({ button: 'right' });
        await page.waitForSelector('.zddc-menu', { timeout: 5000 });
        const item = page.locator('.zddc-menu__item', { hasText: 'New folder' }).first();
        await expect(item).toBeVisible();
        await expect(item).not.toHaveClass(/is-disabled/);
    });

    test('permission-gated items are HIDDEN when not permitted, shown when permitted', async ({ page }) => {
        await openWithTree(page);
        // Pure-DOM unit over the declarative model in server mode.
        const res = await page.evaluate(() => {
            window.app.state.source = 'server';
            function labels(verbs) {
                const node = { name: 'doc.md', ext: 'md', isDir: false, isZip: false,
                               virtual: false, url: '/doc.md', verbs: verbs };
                return window.app.modules.menuModel
                    .buildRowItems(node, null, { path_verbs: verbs })
                    .filter((i) => i.label).map((i) => i.label);
            }
            return { ro: labels('r'), rwd: labels('rwd') };
        });
        // read-only → no Rename/Delete (hidden, not greyed)
        expect(res.ro).not.toContain('Rename…');
        expect(res.ro).not.toContain('Delete…');
        // read+write+delete → both present
        expect(res.rwd).toContain('Rename…');
        expect(res.rwd).toContain('Delete…');
    });

    // New folder / New file are not toolbar buttons — they live in the
    // row/pane context menu (see the "keyboard menu key and kebab" test).
    test('toolbar Sort and Show-hidden drive state', async ({ page }) => {
        await openWithTree(page);
        await page.locator('#sortSelect').selectOption('date:-1');
        expect(await page.evaluate(() => window.app.state.sort)).toEqual({ key: 'date', dir: -1 });

        await page.locator('#showHiddenChk').check();
        expect(await page.evaluate(() => window.app.state.showHidden)).toBe(true);
    });

    test('keyboard menu key and kebab both open the row menu', async ({ page }) => {
        await openWithTree(page);
        const fileRow = page.locator('.tree-row', { has: page.locator('.tree-name__label', { hasText: /^a\.txt$/ }) });

        // Kebab click opens the menu (no preview/toggle side-effect needed here).
        await fileRow.click(); // select first
        await fileRow.locator('.tree-row__kebab').click();
        await expect(page.locator('.zddc-menu')).toBeVisible();
        await page.keyboard.press('Escape');
        await expect(page.locator('.zddc-menu')).toHaveCount(0);

        // Keyboard menu key (Shift+F10) opens it on the selected row.
        await fileRow.click();
        await page.keyboard.press('Shift+F10');
        await expect(page.locator('.zddc-menu')).toBeVisible();
    });
});