import { describe, it } from 'node:test';
import assert from 'node:assert/strict';
import { resolve, join } from 'node:path';
import { fileURLToPath } from 'node:url';
import { resetCounter } from '../../scanners/lib/output.mjs';
import { scan, discoverPlugins } from '../../scanners/plugin-health-scanner.mjs';

const __dirname = fileURLToPath(new URL('.', import.meta.url));
const FIXTURES = resolve(__dirname, '../fixtures');
const TEST_PLUGIN = resolve(FIXTURES, 'test-plugin');
const BROKEN_PLUGIN = resolve(FIXTURES, 'broken-plugin');

describe('discoverPlugins', () => {
  it('discovers a single plugin when pointed at plugin dir', async () => {
    const plugins = await discoverPlugins(TEST_PLUGIN);
    assert.equal(plugins.length, 1);
    assert.ok(plugins[0].endsWith('test-plugin'));
  });

  it('discovers multiple plugins in parent dir', async () => {
    const plugins = await discoverPlugins(FIXTURES);
    // Should find test-plugin and broken-plugin (both have .claude-plugin/plugin.json)
    assert.ok(plugins.length >= 2, `Expected >=2, got ${plugins.length}`);
  });

  it('returns empty array for dir with no plugins', async () => {
    const plugins = await discoverPlugins(resolve(FIXTURES, 'empty-project'));
    assert.equal(plugins.length, 0);
  });
});

describe('scan on valid test-plugin', () => {
  it('returns ok status', async () => {
    resetCounter();
    const result = await scan(TEST_PLUGIN);
    assert.equal(result.scanner, 'PLH');
    assert.equal(result.status, 'ok');
  });

  it('finds commands and agents', async () => {
    resetCounter();
    const result = await scan(TEST_PLUGIN);
    assert.ok(result.files_scanned >= 1, 'Should scan at least 1 plugin');
    // Valid plugin should have few or no findings
    const criticals = result.findings.filter(f => f.severity === 'critical');
    assert.equal(criticals.length, 0, 'Valid plugin should have no critical findings');
  });

  it('no findings for missing plugin.json fields', async () => {
    resetCounter();
    const result = await scan(TEST_PLUGIN);
    // Anchor on PLH + a title-substring stable across humanizer rewrites.
    // Raw: "Missing required field in plugin.json: <field>". Humanized: "A plugin's manifest is missing a required field".
    const missingFields = result.findings.filter(f =>
      f.scanner === 'PLH' && /(missing.{0,40}(field|manifest))|(manifest.{0,40}missing)/i.test(f.title || '')
    );
    assert.equal(missingFields.length, 0, 'All required fields present in test-plugin');
  });

  it('no findings for missing CLAUDE.md sections', async () => {
    resetCounter();
    const result = await scan(TEST_PLUGIN);
    // Raw: "CLAUDE.md missing '<name>' section". Humanized: "A plugin's instructions file is missing a recommended section".
    const missingSections = result.findings.filter(f =>
      f.scanner === 'PLH' && /missing.{0,40}section/i.test(f.title || '')
    );
    assert.equal(missingSections.length, 0, 'All sections present in test-plugin CLAUDE.md');
  });
});

describe('scan on broken-plugin', () => {
  it('detects missing plugin.json fields', async () => {
    resetCounter();
    const result = await scan(BROKEN_PLUGIN);
    // CA-PLH-001 (description) and CA-PLH-002 (version) in broken-plugin.
    const missingFields = result.findings.filter(f =>
      f.scanner === 'PLH' && (f.id === 'CA-PLH-001' || f.id === 'CA-PLH-002')
    );
    assert.ok(missingFields.length >= 2, 'Should detect missing description and version');
  });

  it('detects missing CLAUDE.md', async () => {
    resetCounter();
    const result = await scan(BROKEN_PLUGIN);
    // CA-PLH-003 in broken-plugin = Missing CLAUDE.md.
    const missingMd = result.findings.filter(f => f.scanner === 'PLH' && f.id === 'CA-PLH-003');
    assert.equal(missingMd.length, 1, 'Should detect missing CLAUDE.md');
  });

  it('detects command without frontmatter', async () => {
    resetCounter();
    const result = await scan(BROKEN_PLUGIN);
    // CA-PLH-004 in broken-plugin = Command missing frontmatter.
    const noFrontmatter = result.findings.filter(f => f.scanner === 'PLH' && f.id === 'CA-PLH-004');
    assert.equal(noFrontmatter.length, 1, 'Should detect command without frontmatter');
  });

  it('detects agent missing required frontmatter fields', async () => {
    resetCounter();
    const result = await scan(BROKEN_PLUGIN);
    // CA-PLH-005 (missing model) and CA-PLH-006 (missing tools) in broken-plugin.
    const missingAgent = result.findings.filter(f =>
      f.scanner === 'PLH' && (f.id === 'CA-PLH-005' || f.id === 'CA-PLH-006')
    );
    // bad-agent.md has name+description but missing model and tools
    assert.ok(missingAgent.length >= 2, `Should detect missing model and tools, got ${missingAgent.length}: ${missingAgent.map(f => f.id).join(', ')}`);
  });
});

describe('scan with no plugins', () => {
  it('returns info finding for empty directory', async () => {
    resetCounter();
    const result = await scan(resolve(FIXTURES, 'empty-project'));
    assert.equal(result.findings.length, 1);
    // CA-PLH-001 in empty-project = No plugins found.
    assert.equal(result.findings[0].id, 'CA-PLH-001');
    assert.equal(result.findings[0].scanner, 'PLH');
    assert.equal(result.findings[0].severity, 'info');
  });
});

describe('cross-plugin command conflict detection', () => {
  it('scans fixtures dir and reports findings for all plugins', async () => {
    resetCounter();
    const result = await scan(FIXTURES);
    assert.equal(result.scanner, 'PLH');
    assert.ok(result.files_scanned >= 2, 'Should scan multiple plugins');
  });
});

describe('finding format', () => {
  it('findings have standard fields', async () => {
    resetCounter();
    const result = await scan(BROKEN_PLUGIN);
    assert.ok(result.findings.length > 0);
    const f = result.findings[0];
    assert.ok(f.id.startsWith('CA-PLH-'));
    assert.equal(f.scanner, 'PLH');
    assert.ok(['critical', 'high', 'medium', 'low', 'info'].includes(f.severity));
    assert.ok(f.title);
    assert.ok(f.description);
  });
});