/**
 * Tests for `check-catalogue-drift.mjs`. Run via:
 *   node --test scripts/check-catalogue-drift.spec.mjs
 *
 * Uses Node's built-in test runner (no Vitest / Jest dependency)
 * because the script itself has no per-app project hosting it;
 * shipping a third test runner just for this one file would be
 * overkill.
 */

import { describe, it } from 'node:test';
import assert from 'node:assert/strict';
import { mkdirSync, mkdtempSync, writeFileSync } from 'node:fs';
import { tmpdir } from 'node:os';
import { join } from 'node:path';
import {
  extractCatalogues,
  findViolationsInFile,
  scanWorkspace,
} from './check-catalogue-drift.mjs';

/**
 * Build a self-contained workspace fixture with:
 *   - a synthesised authorization.types.ts file mirroring the real
 *     catalogue declarations,
 *   - a bag of .ts files under apps/ + libs/ exercising the
 *     decorators with whichever values the caller asks for.
 */
function makeFixture({ files }) {
  const root = mkdtempSync(join(tmpdir(), 'drift-fixture-'));
  mkdirSync(join(root, 'libs/shared/auth/src/lib'), { recursive: true });
  writeFileSync(
    join(root, 'libs/shared/auth/src/lib/authorization.types.ts'),
    `export const PRIVILEGES = [
      'Portal.Admin',
      'Portal.Auditor',
    ] as const;
    export const FUNCTIONAL_ROLES = [
      'collaborateur',
      'rh',
      'dpo',
    ] as const;
    export const SCOPE_KINDS = [
      'self',
      'unrestricted',
    ] as const;
    `,
  );
  for (const [relativePath, contents] of Object.entries(files)) {
    const full = join(root, relativePath);
    mkdirSync(join(full, '..'), { recursive: true });
    writeFileSync(full, contents);
  }
  return root;
}

describe('extractCatalogues', () => {
  it('reads the three closed catalogues from authorization.types.ts', () => {
    const root = makeFixture({ files: {} });
    const cataloguePath = join(root, 'libs/shared/auth/src/lib/authorization.types.ts');
    const cats = extractCatalogues(cataloguePath);
    assert.deepEqual([...cats.PRIVILEGES].sort(), ['Portal.Admin', 'Portal.Auditor']);
    assert.deepEqual([...cats.FUNCTIONAL_ROLES].sort(), ['collaborateur', 'dpo', 'rh']);
  });

  it('throws when the catalogue file omits an expected declaration', () => {
    const root = mkdtempSync(join(tmpdir(), 'drift-fixture-'));
    mkdirSync(join(root, 'libs/shared/auth/src/lib'), { recursive: true });
    writeFileSync(
      join(root, 'libs/shared/auth/src/lib/authorization.types.ts'),
      `export const PRIVILEGES = ['Portal.Admin'] as const;\n`,
    );
    assert.throws(
      () => extractCatalogues(join(root, 'libs/shared/auth/src/lib/authorization.types.ts')),
      /FUNCTIONAL_ROLES/,
    );
  });
});

describe('findViolationsInFile', () => {
  const catalogues = {
    PRIVILEGES: new Set(['Portal.Admin', 'Portal.Auditor']),
    FUNCTIONAL_ROLES: new Set(['collaborateur', 'rh', 'dpo']),
  };

  it('returns no violations on a file that uses only catalogue values', () => {
    const text = `
      class Foo {
        @RequirePrivilege('Portal.Admin')
        @RequireRole('rh', 'collaborateur')
        method() {}
      }
    `;
    const violations = findViolationsInFile('virtual.ts', catalogues, text);
    assert.equal(violations.length, 0);
  });

  it('flags every off-catalogue privilege value', () => {
    const text = `
      class Foo {
        @RequirePrivilege('Portal.Admin', 'Portal.Bogus')
        method() {}
      }
    `;
    const violations = findViolationsInFile('virtual.ts', catalogues, text);
    assert.equal(violations.length, 1);
    assert.equal(violations[0].callee, 'RequirePrivilege');
    assert.equal(violations[0].value, 'Portal.Bogus');
    assert.equal(violations[0].catalogue, 'PRIVILEGES');
  });

  it('flags every off-catalogue role value', () => {
    const text = `
      class Foo {
        @RequireRole('rh', 'rogue-role')
        method() {}
      }
    `;
    const violations = findViolationsInFile('virtual.ts', catalogues, text);
    assert.equal(violations.length, 1);
    assert.equal(violations[0].callee, 'RequireRole');
    assert.equal(violations[0].value, 'rogue-role');
    assert.equal(violations[0].catalogue, 'FUNCTIONAL_ROLES');
  });

  it('skips non-literal arguments (variable indirection)', () => {
    // A real-world escape hatch — TypeScript catches this at
    // compile time via the decorator signature, the drift gate is
    // best-effort here.
    const text = `
      const slug = 'rogue-role';
      class Foo {
        @RequireRole(slug)
        method() {}
      }
    `;
    const violations = findViolationsInFile('virtual.ts', catalogues, text);
    assert.equal(violations.length, 0);
  });

  it('also detects the literal when the decorator is invoked as a function call (non-decorator usage)', () => {
    // A test fixture might call RequirePrivilege as a function to
    // produce a decorator value for a manual UseGuards pattern; the
    // call site shape is identical so the script catches it.
    const text = `
      const dec = RequirePrivilege('Portal.Bogus');
    `;
    const violations = findViolationsInFile('virtual.ts', catalogues, text);
    assert.equal(violations.length, 1);
    assert.equal(violations[0].value, 'Portal.Bogus');
  });

  it('reports line and column of the offending literal', () => {
    const text = ['line1', 'line2', "  @RequireRole('rogue-role')"].join('\n');
    const violations = findViolationsInFile('virtual.ts', catalogues, text);
    assert.equal(violations.length, 1);
    assert.equal(violations[0].line, 3);
    // The literal starts at column 16 (0-indexed 15, +1 in the report).
    assert.equal(violations[0].column, 16);
  });
});

describe('scanWorkspace', () => {
  it('returns 0 violations on a clean fixture', () => {
    const root = makeFixture({
      files: {
        'apps/x/src/main.ts': `
          class Foo {
            @RequirePrivilege('Portal.Admin')
            @RequireRole('rh', 'collaborateur')
            m() {}
          }
        `,
      },
    });
    const { violations } = scanWorkspace(root);
    assert.equal(violations.length, 0);
  });

  it('aggregates violations across multiple files', () => {
    const root = makeFixture({
      files: {
        'apps/x/src/a.ts': `
          @RequirePrivilege('Portal.Ghost') class A {}
        `,
        'libs/y/src/b.ts': `
          @RequireRole('phantom-role') class B {}
        `,
      },
    });
    const { violations } = scanWorkspace(root);
    assert.equal(violations.length, 2);
    const values = violations.map((v) => v.value).sort();
    assert.deepEqual(values, ['Portal.Ghost', 'phantom-role']);
  });

  it('skips dist/ and node_modules/ folders even when they contain decorator calls', () => {
    const root = makeFixture({
      files: {
        'apps/x/dist/built.ts': `@RequireRole('rogue-role') class X {}`,
        'apps/x/node_modules/whatever/foo.ts': `@RequireRole('also-rogue') class Y {}`,
      },
    });
    const { violations } = scanWorkspace(root);
    assert.equal(violations.length, 0);
  });

  it('skips the generated gRPC stubs (different `roles` semantics)', () => {
    const root = makeFixture({
      files: {
        'apps/portal-bff/src/grpc/gen/apf-ai/common.ts': `
          // Codegen output: this is NOT an ADR-0025 decorator call,
          // it just happens to share an identifier.
          @RequireRole('not-a-real-role') class FromGen {}
        `,
      },
    });
    const { violations } = scanWorkspace(root);
    assert.equal(violations.length, 0);
  });

  it('does NOT skip spec files (deliberate decorator usage in tests must stay in sync)', () => {
    const root = makeFixture({
      files: {
        'libs/y/src/y.spec.ts': `
          @RequireRole('rogue-role') class TestSubject {}
        `,
      },
    });
    const { violations } = scanWorkspace(root);
    assert.equal(violations.length, 1);
  });
});