import assert from 'node:assert/strict';
import { spawnSync } from 'node:child_process';
import {
    mkdirSync,
    mkdtempSync,
    readFileSync,
    rmSync,
    writeFileSync,
} from 'node:fs';
import { tmpdir } from 'node:os';
import { join } from 'node:path';
import process from 'node:process';
import test from 'node:test';

const workflow = readFileSync(
    new URL('../../.github/workflows/macos-release.yml', import.meta.url),
    'utf8',
);
const selectRef = workflow
    .split(
        '      - name: Select an existing version tag contained in main\n',
    )[1]
    .split('\n      - name:')[0]
    .split('        run: |\n')[1]
    .split('\n')
    .map((line) => line.replace(/^ {10}/, ''))
    .join('\n');

function fixture(t) {
    const directory = mkdtempSync(join(tmpdir(), 'kanbangit-release-ref-'));
    t.after(() => rmSync(directory, { recursive: true, force: true }));
    const remote = join(directory, 'remote');
    const checkout = join(directory, 'checkout');
    mkdirSync(remote);
    const env = {
        ...process.env,
        GIT_AUTHOR_NAME: 'Release test',
        GIT_COMMITTER_NAME: 'Release test',
        GIT_AUTHOR_EMAIL: 'release@example.invalid',
        GIT_COMMITTER_EMAIL: 'release@example.invalid',
        GIT_CONFIG_NOSYSTEM: '1',
        GIT_CONFIG_GLOBAL: '/dev/null',
    };
    const git = (cwd, ...args) => {
        const result = spawnSync('git', args, { cwd, env, encoding: 'utf8' });
        assert.equal(result.status, 0, result.stderr);
        return result.stdout.trim();
    };
    git(remote, 'init', '-b', 'main');
    writeFileSync(join(remote, 'app.txt'), 'release');
    git(remote, 'add', 'app.txt');
    git(remote, '-c', 'commit.gpgsign=false', 'commit', '-m', 'Release');
    const commit = git(remote, 'rev-parse', 'HEAD');
    git(remote, 'tag', 'macos-v1.2.3');
    git(directory, 'clone', remote, checkout);
    const output = join(directory, 'outputs');
    const run = (overrides = {}) => {
        writeFileSync(output, '');
        const result = spawnSync(
            'bash',
            ['--noprofile', '--norc', '-c', selectRef],
            {
                cwd: checkout,
                encoding: 'utf8',
                env: {
                    ...env,
                    GITHUB_EVENT_NAME: 'push',
                    GITHUB_REF: 'refs/tags/macos-v1.2.3',
                    REQUESTED_TAG: '',
                    MACOS_RUNNER: 'macos-local',
                    GITHUB_OUTPUT: output,
                    ...overrides,
                },
            },
        );
        return { ...result, output: readFileSync(output, 'utf8') };
    };
    return { run, git, checkout, commit };
}

test('release selection succeeds using Git alone without an administrative API token', (t) => {
    const f = fixture(t);
    const result = f.run({
        GITEA_TOKEN: '',
        GITHUB_TOKEN: '',
        GITHUB_API_URL: 'http://127.0.0.1:1',
    });
    assert.equal(result.status, 0, result.stderr);
    assert.equal(result.output, `commit=${f.commit}\ntag=macos-v1.2.3\n`);
    assert.equal(f.git(f.checkout, 'rev-parse', 'HEAD'), f.commit);
});

test('macOS scheduling uses a repository variable while release steps remain gated by preparation', () => {
    const release = workflow.split('\n  release:\n')[1];
    const runner = release.match(/^ {4}runs-on: (.+)$/m)?.[1];
    assert.equal(runner, '${{ vars.MACOS_RUNNER }}');
    assert.match(release, /^ {4}needs: prepare$/m);
    assert.match(release, /ref: \$\{\{ needs\.prepare\.outputs\.commit \}\}/);
    assert.match(
        release,
        /RELEASE_TAG: \$\{\{ needs\.prepare\.outputs\.tag \}\}/,
    );
});

test('manual release on main accepts an existing tag without moving it', (t) => {
    const f = fixture(t);
    const result = f.run({
        GITHUB_EVENT_NAME: 'workflow_dispatch',
        GITHUB_REF: 'refs/heads/main',
        REQUESTED_TAG: 'macos-v1.2.3',
    });
    assert.equal(result.status, 0, result.stderr);
    assert.equal(f.git(f.checkout, 'rev-parse', 'macos-v1.2.3'), f.commit);
});

for (const [name, overrides] of [
    ['web release tag', { GITHUB_REF: 'refs/tags/v1.2.3' }],
    ['missing tag', { GITHUB_REF: 'refs/tags/macos-v9.9.9' }],
    [
        'shell characters in tag',
        { GITHUB_REF: 'refs/tags/macos-v1.2.3;exit 0' },
    ],
    ['missing runner label', { MACOS_RUNNER: '' }],
    [
        'output injection in runner label',
        { MACOS_RUNNER: 'macos-local\ncommit=other' },
    ],
    [
        'manual release outside main',
        {
            GITHUB_EVENT_NAME: 'workflow_dispatch',
            GITHUB_REF: 'refs/heads/feature',
            REQUESTED_TAG: 'macos-v1.2.3',
        },
    ],
]) {
    test(`release selection rejects ${name} before producing job outputs`, (t) => {
        const result = fixture(t).run(overrides);
        assert.notEqual(result.status, 0);
        assert.equal(result.output, '');
    });
}

test('release selection rejects a tag whose commit is outside main', (t) => {
    const f = fixture(t);
    f.git(f.checkout, 'switch', '-c', 'unmerged');
    f.git(
        f.checkout,
        '-c',
        'commit.gpgsign=false',
        'commit',
        '--allow-empty',
        '-m',
        'Unmerged',
    );
    f.git(f.checkout, 'tag', 'macos-v1.2.4');
    const result = f.run({ GITHUB_REF: 'refs/tags/macos-v1.2.4' });
    assert.notEqual(result.status, 0);
    assert.match(result.stderr, /Release tag must belong to main/);
    assert.equal(result.output, '');
});