import { test, expect } from '@playwright/test';
import * as fs from 'fs';
import * as os from 'os';
import * as path from 'path';

// "Add from archive" for the tables tool's project MDL rollup. The page is
// loaded offline (file://) with an injected #table-context whose columns drive
// how a tracking number splits into deliverable fields. The walk / dedupe /
// instantiate logic is exercised against in-page mock FS-Access handles — no
// server needed.

const HTML_PATH = path.resolve('tables/dist/tables.html');
const HTML_RAW = fs.readFileSync(HTML_PATH, 'utf8');

// originator … identity fields … title  (originator is folder-pinned → omitted
// from the body; everything between originator and title is the tracking split).
const MDL_COLUMNS = [
    { field: 'originator', title: 'Orig' },
    { field: 'phase',      title: 'Phase' },
    { field: 'project',    title: 'Project' },
    { field: 'area',       title: 'Area' },
    { field: 'discipline', title: 'Disc' },
    { field: 'type',       title: 'Type' },
    { field: 'sequence',   title: 'Seq' },
    { field: 'suffix',     title: 'Suffix' },
    { field: 'title',      title: 'Deliverable' },
];

async function loadRollup(page) {
    const ctx = { title: 'MDL', columns: MDL_COLUMNS, rows: [], addable: false };
    const ctxJson = JSON.stringify(ctx).replace(/<\//g, '<\\/');
    const patched = HTML_RAW.replace(
        /<script id="table-context" type="application\/json">[\s\S]*?<\/script>/,
        `<script id="table-context" type="application/json">${ctxJson}</script>`,
    );
    const tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'tables-mdl-'));
    const tmpPath = path.join(tmpDir, 'tables.html');
    fs.writeFileSync(tmpPath, patched);
    await page.goto(`file://${tmpPath}`, { waitUntil: 'load' });
    await page.waitForFunction(
        () => window.tablesApp && window.tablesApp.modules && window.tablesApp.modules.mdlFromArchive,
    );
}

test.describe('tables/ — Add deliverables from archive', () => {
    test('identityFields() = columns between originator and title', async ({ page }) => {
        await loadRollup(page);
        const fields = await page.evaluate(() => window.tablesApp.modules.mdlFromArchive.identityFields());
        expect(fields).toEqual(['phase', 'project', 'area', 'discipline', 'type', 'sequence', 'suffix']);
    });

    test('deliverableFromFile splits the tracking number, omits originator, keeps title', async ({ page }) => {
        await loadRollup(page);
        const d = await page.evaluate(() => {
            const m = window.tablesApp.modules.mdlFromArchive;
            return m.deliverableFromFile(
                { tracking: 'ACME-DD-PRJ-A1-CIV-DWG-001-X', title: 'Foundation Plan' },
                m.identityFields(),
            );
        });
        expect(d.originator).toBe('ACME');
        expect(d.tracking).toBe('ACME-DD-PRJ-A1-CIV-DWG-001-X');
        expect(d.body).toEqual({
            phase: 'DD', project: 'PRJ', area: 'A1', discipline: 'CIV',
            type: 'DWG', sequence: '001', suffix: 'X', title: 'Foundation Plan',
        });
        // originator must NOT be in the body (server pins it from the folder).
        expect(d.body.originator).toBeUndefined();
    });

    test('a shorter tracking number leaves trailing identity fields unset', async ({ page }) => {
        await loadRollup(page);
        const d = await page.evaluate(() => {
            const m = window.tablesApp.modules.mdlFromArchive;
            // no suffix segment
            return m.deliverableFromFile({ tracking: 'ACME-DD-PRJ-A1-CIV-DWG-001', title: '' }, m.identityFields());
        });
        expect(d.body.sequence).toBe('001');
        expect('suffix' in d.body).toBe(false);
    });

    test('dedupe collapses duplicate tracking numbers, dropping unsplittable rows', async ({ page }) => {
        await loadRollup(page);
        const out = await page.evaluate(() => {
            const m = window.tablesApp.modules.mdlFromArchive;
            return m.dedupe([
                { tracking: 'ACME-DD-PRJ-A1-CIV-DWG-001', title: 'a' },
                { tracking: 'ACME-DD-PRJ-A1-CIV-DWG-001', title: 'a-dup' },
                { tracking: 'ACME-DD-PRJ-A1-CIV-DWG-002', title: 'b' },
                { tracking: 'NOPE', title: 'too short' },
            ], m.identityFields());
        });
        expect(out.map(d => d.tracking)).toEqual([
            'ACME-DD-PRJ-A1-CIV-DWG-001', 'ACME-DD-PRJ-A1-CIV-DWG-002',
        ]);
        expect(out[0].body.title).toBe('a'); // first wins
    });

    test('walkArchive collects valid document files, skipping mdl/rsk/dot/underscore dirs', async ({ page }) => {
        await loadRollup(page);
        const files = await page.evaluate(async () => {
            // Mock FS-Access directory handles.
            function dir(name, entries) {
                return {
                    name, kind: 'directory', _entries: entries,
                    async *values() { for (const e of entries) yield e; },
                    async getDirectoryHandle(n) {
                        const e = entries.find(x => x.name === n && x.kind === 'directory');
                        if (!e) throw new DOMException('not found', 'NotFoundError');
                        return e;
                    },
                };
            }
            const file = name => ({ name, kind: 'file' });
            const root = dir('archive', [
                dir('Acme', [
                    dir('issued', [
                        dir('2026-05-01_ACME-DD-PRJ-A1-CIV-DWG-001 (IFR) - Plan', [
                            file('ACME-DD-PRJ-A1-CIV-DWG-001_B (IFR) - Foundation Plan.pdf'),
                            file('not-a-zddc-file.txt'),
                        ]),
                    ]),
                    dir('mdl', [ file('ACME-DD-PRJ-A1-CIV-DWG-001.yaml') ]),  // skipped
                    dir('rsk', [ file('whatever_A (IFA) - x.pdf') ]),         // skipped
                ]),
                dir('_system', [ file('ACME-DD-PRJ-A1-CIV-DWG-999_A (IFA) - hidden.pdf') ]), // skipped
            ]);
            const out = await window.tablesApp.modules.mdlFromArchive.walkArchive(root);
            return out.map(f => ({ tracking: f.tracking, party: f.party, slot: f.slot, rev: f.revision, title: f.title }));
        });
        expect(files).toEqual([
            { tracking: 'ACME-DD-PRJ-A1-CIV-DWG-001', party: 'Acme', slot: 'issued', rev: 'B', title: 'Foundation Plan' },
        ]);
    });

    test('instantiateOne writes a yaml on create, skips when it already exists', async ({ page }) => {
        await loadRollup(page);
        const result = await page.evaluate(async () => {
            const writes = [];
            function fileHandle(name, exists) {
                return {
                    name,
                    async createWritable() {
                        return {
                            async write(blob) { writes.push({ name, text: await blob.text() }); },
                            async close() {},
                        };
                    },
                    _exists: exists,
                };
            }
            function mdlDir() {
                const present = {}; // tracking.yaml already there
                present['ACME-DD-PRJ-A1-CIV-DWG-002.yaml'] = true;
                return {
                    async getFileHandle(n, opts) {
                        if (opts && opts.create) return fileHandle(n, false);
                        if (present[n]) return fileHandle(n, true);
                        throw new DOMException('nf', 'NotFoundError');
                    },
                };
            }
            function originatorDir() {
                return { async getDirectoryHandle() { return mdlDir(); } };
            }
            const archiveRoot = { async getDirectoryHandle() { return originatorDir(); } };
            const m = window.tablesApp.modules.mdlFromArchive;
            const created = await m.instantiateOne(archiveRoot, {
                tracking: 'ACME-DD-PRJ-A1-CIV-DWG-001', originator: 'ACME',
                body: { phase: 'DD', project: 'PRJ', area: 'A1', discipline: 'CIV', type: 'DWG', sequence: '001', title: 'Plan' },
            });
            const skipped = await m.instantiateOne(archiveRoot, {
                tracking: 'ACME-DD-PRJ-A1-CIV-DWG-002', originator: 'ACME',
                body: { phase: 'DD', project: 'PRJ', area: 'A1', discipline: 'CIV', type: 'DWG', sequence: '002', title: 'Plan2' },
            });
            return { created, skipped, writes };
        });
        expect(result.created).toBe('created');
        expect(result.skipped).toBe('skipped');
        expect(result.writes.length).toBe(1);
        expect(result.writes[0].name).toBe('ACME-DD-PRJ-A1-CIV-DWG-001.yaml');
        expect(result.writes[0].text).toContain('title: Plan');
        expect(result.writes[0].text).toContain('discipline: CIV');
        // originator must not be serialized into the body
        expect(result.writes[0].text).not.toContain('originator:');
    });

    test('the "From archive" button stays hidden when not on an /mdl/ rollup path', async ({ page }) => {
        await loadRollup(page);
        // file:// path is not /mdl/, so setup() must not reveal the button.
        const hidden = await page.evaluate(() => document.getElementById('table-add-from-archive').hidden);
        expect(hidden).toBe(true);
    });
});