import { describe, it, expect, beforeEach, afterEach } from 'vitest';
import fs from 'node:fs';
import os from 'node:os';
import path from 'node:path';
import zlib from 'node:zlib';
import { definePlugin, PLUGIN_API_VERSION, validateManifest, createMockHost } from '../src/index.js';
import { scaffold } from '../src/cli/create.js';
import { validatePluginDir } from '../src/cli/validate.js';
import { makeZip } from '../src/zip.js';
import { packPluginDir } from '../src/cli/pack.js';
import { buildEntry } from '../src/cli/entry.js';

/** A central-directory zip reader mirroring the TREK server's, to prove round-trip. */
function readZip(buf: Buffer): Record<string, Buffer> {
  let e = -1;
  for (let i = buf.length - 22; i >= 0; i--) if (buf.readUInt32LE(i) === 0x06054b50) { e = i; break; }
  const count = buf.readUInt16LE(e + 8);
  let p = buf.readUInt32LE(e + 16);
  const out: Record<string, Buffer> = {};
  for (let i = 0; i < count; i++) {
    const method = buf.readUInt16LE(p + 10);
    const compSize = buf.readUInt32LE(p + 20);
    const nameLen = buf.readUInt16LE(p + 28);
    const extraLen = buf.readUInt16LE(p + 30);
    const commentLen = buf.readUInt16LE(p + 32);
    const lho = buf.readUInt32LE(p + 42);
    const name = buf.subarray(p + 46, p + 46 + nameLen).toString('utf8');
    const dataStart = lho + 30 + buf.readUInt16LE(lho + 26) + buf.readUInt16LE(lho + 28);
    const comp = buf.subarray(dataStart, dataStart + compSize);
    out[name] = method === 0 ? Buffer.from(comp) : zlib.inflateRawSync(comp);
    p += 46 + nameLen + extraLen + commentLen;
  }
  return out;
}

describe('definePlugin + api version', () => {
  it('returns the definition and exposes the api version', () => {
    const def = { onLoad: async () => {} };
    expect(definePlugin(def)).toBe(def);
    expect(PLUGIN_API_VERSION).toBe(1);
  });
});

describe('validateManifest', () => {
  const base = { id: 'flight-tracker', name: 'Flight', version: '1.0.0', type: 'widget', apiVersion: 1 };
  it('accepts a valid manifest', () => {
    expect(validateManifest(base).ok).toBe(true);
  });
  it('collects every problem', () => {
    const r = validateManifest({ id: 'Bad', version: '1.x', type: 'nope', permissions: ['fs:read'] });
    expect(r.ok).toBe(false);
    expect(r.errors.length).toBeGreaterThan(2);
  });
  it('requires egress when http:outbound is declared', () => {
    expect(validateManifest({ ...base, permissions: ['http:outbound'] }).ok).toBe(false);
    expect(validateManifest({ ...base, permissions: ['http:outbound'], egress: ['api.x.com'] }).ok).toBe(true);
  });
  it('rejects native modules and non-objects', () => {
    expect(validateManifest({ ...base, nativeModules: true }).ok).toBe(false);
    expect(validateManifest('nope').ok).toBe(false);
  });
});

describe('createMockHost', () => {
  it('enforces the granted permission set', async () => {
    const { ctx } = createMockHost({ grants: ['db:own'] });
    await expect(ctx.db.migrate('1', 'CREATE TABLE t (x)')).resolves.toEqual({ applied: true });
    await expect(ctx.trips.getById(1, 1)).rejects.toThrow(/PERMISSION_DENIED/);
  });

  it('membership-checks trip reads and records broadcasts', async () => {
    const { ctx, broadcasts } = createMockHost({
      grants: ['db:read:trips', 'ws:broadcast:trip'],
      trips: { 1: { members: [42], data: { id: 1, name: 'Japan' } } },
    });
    await expect(ctx.trips.getById(1, 99)).rejects.toThrow(/RESOURCE_FORBIDDEN/);
    expect(await ctx.trips.getById(1, 42)).toEqual({ id: 1, name: 'Japan' });
    await ctx.ws.broadcastToTrip(1, 'ping', { a: 1 });
    expect(broadcasts).toEqual([{ kind: 'trip', target: 1, event: 'ping', data: { a: 1 } }]);
  });

  it('returns canned db.query results + records logs', async () => {
    const { ctx, logs } = createMockHost({ grants: ['db:own'], queryResults: { 'SELECT 1': [{ n: 1 }] } });
    expect(await ctx.db.query('SELECT 1')).toEqual([{ n: 1 }]);
    ctx.log.info('hi');
    expect(logs).toEqual([{ level: 'info', msg: 'hi' }]);
  });
});

describe('scaffold + validate CLIs', () => {
  let tmp: string;
  beforeEach(() => { tmp = fs.mkdtempSync(path.join(os.tmpdir(), 'sdk-')); });
  afterEach(() => { fs.rmSync(tmp, { recursive: true, force: true }); });

  it('scaffolds a widget plugin that then validates (with README warnings)', () => {
    scaffold('my-widget', 'widget', tmp);
    const dir = path.join(tmp, 'my-widget');
    expect(fs.existsSync(path.join(dir, 'trek-plugin.json'))).toBe(true);
    expect(fs.existsSync(path.join(dir, 'server', 'index.js'))).toBe(true);
    expect(fs.existsSync(path.join(dir, 'client', 'index.html'))).toBe(true);

    const r = validatePluginDir(dir);
    expect(r.ok).toBe(true); // manifest + files valid
    expect(r.warnings.some((w) => /placeholder|screenshot/.test(w))).toBe(true); // README is the unfilled template
  });

  it('rejects an invalid plugin name', () => {
    expect(() => scaffold('Bad Name', 'widget', tmp)).toThrow(/invalid plugin id/);
  });

  it('validatePluginDir flags a missing manifest', () => {
    expect(validatePluginDir(tmp).ok).toBe(false);
  });
});

describe('reference plugin (examples/koffi)', () => {
  const dir = path.resolve(import.meta.dirname, '..', 'examples', 'koffi');

  it('passes the same validation authors run', () => {
    const r = validatePluginDir(dir);
    expect(r.errors).toEqual([]);
    expect(r.ok).toBe(true);
  });

  it('has a valid, minimal-permission hero-widget manifest', () => {
    const manifest = JSON.parse(fs.readFileSync(path.join(dir, 'trek-plugin.json'), 'utf8')) as {
      capabilities?: { widget?: { slot?: string } };
    };
    const res = validateManifest(manifest);
    expect(res.ok).toBe(true);
    expect(res.manifest?.permissions).toEqual(['db:read:trips']);
    expect(manifest.capabilities?.widget?.slot).toBe('hero');
  });
});

describe('makeZip', () => {
  it('round-trips through a central-directory reader (installer-compatible)', () => {
    const files = [
      { name: 'trek-plugin.json', data: Buffer.from('{"id":"x"}') },
      { name: 'server/index.js', data: Buffer.from('module.exports={}\n'.repeat(200)) },
    ];
    const zip = makeZip(files);
    expect(zip.subarray(0, 2).toString()).toBe('PK'); // local file header magic
    const back = readZip(zip);
    expect(Object.keys(back).sort()).toEqual(['server/index.js', 'trek-plugin.json']);
    expect(back['trek-plugin.json'].toString()).toBe('{"id":"x"}');
    expect(back['server/index.js'].length).toBe(files[1].data.length);
  });
});

describe('pack + entry (publishing automation)', () => {
  const koffi = path.resolve(import.meta.dirname, '..', 'examples', 'koffi');
  let tmp: string;
  beforeEach(() => { tmp = fs.mkdtempSync(path.join(os.tmpdir(), 'pack-')); });
  afterEach(() => { fs.rmSync(tmp, { recursive: true, force: true }); });

  it('packs the canonical layout, excludes docs/, and reports sha256 + size', () => {
    const out = path.join(tmp, 'plugin.zip');
    const r = packPluginDir(koffi, out);
    expect(r.files).toEqual(['README.md', 'client/index.html', 'server/index.js', 'trek-plugin.json']);
    expect(r.sha256).toMatch(/^[0-9a-f]{64}$/);
    expect(r.size).toBeGreaterThan(0);
    const back = readZip(fs.readFileSync(out));
    expect(back['trek-plugin.json']).toBeTruthy();
    expect(Object.keys(back).some((n) => n.startsWith('docs/'))).toBe(false); // screenshot served from repo, not shipped
  });

  it('refuses a plugin that ships a native binary', () => {
    const bad = path.join(tmp, 'bad');
    fs.mkdirSync(path.join(bad, 'server'), { recursive: true });
    fs.writeFileSync(path.join(bad, 'trek-plugin.json'), JSON.stringify({ id: 'bad-plug', name: 'Bad', version: '1.0.0', type: 'integration', permissions: [], egress: [] }));
    fs.writeFileSync(path.join(bad, 'server', 'index.js'), 'module.exports={}');
    fs.writeFileSync(path.join(bad, 'server', 'thing.node'), Buffer.from([1, 2, 3]));
    fs.writeFileSync(path.join(bad, 'README.md'), '# Bad\n![x](x.png)\ncontent');
    expect(() => packPluginDir(bad, path.join(tmp, 'x.zip'))).toThrow(/native binaries/);
  });

  it('builds a registry entry with sha256/size/commit/minTrekVersion filled in', () => {
    const out = path.join(tmp, 'plugin.zip');
    const packed = packPluginDir(koffi, out);
    const entry = buildEntry({
      dir: koffi, repo: 'mauriceboe/trek-plugin-koffi', tag: 'v1.0.0', zipPath: out,
      commit: 'a'.repeat(40), now: '2026-07-04T00:00:00.000Z',
    });
    expect(entry.id).toBe('koffi');
    expect(entry.type).toBe('widget');
    const v = entry.versions[0];
    expect(v.sha256).toBe(packed.sha256);
    expect(v.size).toBe(packed.size);
    expect(v.commitSha).toBe('a'.repeat(40));
    expect(v.minTrekVersion).toBe('3.2.0');
    expect(v.downloadUrl).toBe('https://github.com/mauriceboe/trek-plugin-koffi/releases/download/v1.0.0/plugin.zip');
    expect(v.nativeModules).toBe(false);
  });

  it('--merge prepends the new version onto an existing entry, newest-first', () => {
    const out = path.join(tmp, 'plugin.zip');
    packPluginDir(koffi, out);
    const existingPath = path.join(tmp, 'koffi.json');
    fs.writeFileSync(existingPath, JSON.stringify({
      id: 'koffi', name: 'Koffi', author: 'TREK', description: 'x', repo: 'mauriceboe/trek-plugin-koffi', type: 'widget',
      versions: [{ version: '0.9.0', gitTag: 'v0.9.0', commitSha: 'b'.repeat(40), downloadUrl: 'https://github.com/x/y/releases/download/v0.9.0/plugin.zip', sha256: 'c'.repeat(64), minTrekVersion: '3.2.0', size: 10, apiVersion: 1, nativeModules: false, publishedAt: '2026-01-01T00:00:00.000Z' }],
    }));
    const merged = buildEntry({
      dir: koffi, repo: 'mauriceboe/trek-plugin-koffi', tag: 'v1.0.0', zipPath: out,
      commit: 'a'.repeat(40), mergePath: existingPath, now: '2026-07-04T00:00:00.000Z',
    });
    expect(merged.versions.map((v) => v.version)).toEqual(['1.0.0', '0.9.0']);
  });
});