import { spawnSync } from 'node:child_process';
import { createHash } from 'node:crypto';
import {
    appendFileSync,
    copyFileSync,
    readlinkSync,
    existsSync,
    mkdirSync,
    mkdtempSync,
    readFileSync,
    renameSync,
    rmSync,
    writeFileSync,
} from 'node:fs';
import { dirname, join, resolve } from 'node:path';
import process from 'node:process';
import { updateSource } from './update-manifest.mjs';
import { fileURLToPath, pathToFileURL } from 'node:url';
import {
    appleTeamId,
    bundleIdentifier,
    verifySignedMacosApp,
} from './release-macos.mjs';

const nativeDirectory = dirname(fileURLToPath(import.meta.url));

export function releaseMetadata(
    env = process.env,
    directory = nativeDirectory,
) {
    const config = JSON.parse(
        readFileSync(join(directory, 'src-tauri/tauri.conf.json'), 'utf8'),
    );
    const nativePackage = JSON.parse(
        readFileSync(join(directory, 'package.json'), 'utf8'),
    );
    const packageVersion = nativePackage.version;
    const cargoVersion = readFileSync(
        join(directory, 'src-tauri/Cargo.toml'),
        'utf8',
    )
        .match(/\[package\]([\s\S]*?)(?:\n\[|$)/)?.[1]
        .match(/^version\s*=\s*"([^"]+)"/m)?.[1];
    if (
        !/^(0|[1-9]\d*)\.(0|[1-9]\d*)\.(0|[1-9]\d*)$/.test(config.version) ||
        config.version !== packageVersion ||
        config.version !== cargoVersion
    ) {
        throw new Error(
            'Tauri, package.json and Cargo.toml must have the same stable release version.',
        );
    }
    if (env.RELEASE_TAG !== `macos-v${config.version}`) {
        throw new Error(
            'Release tag must be macos-vMAJOR.MINOR.PATCH and match the app version.',
        );
    }
    if (
        config.identifier !== bundleIdentifier ||
        config.productName !== 'KanbanGit'
    ) {
        throw new Error(
            'The macOS product name and bundle identifier must stay unchanged.',
        );
    }
    if (config.plugins?.updater?.pubkey !== updateSource.publicKey) {
        throw new Error(
            'The app updater key must match the permanent release key.',
        );
    }
    if (
        !/^\d+(?:\.\d+){0,2}$/.test(config.bundle?.macOS?.bundleVersion || '')
    ) {
        throw new Error(
            'Set a numeric macOS bundleVersion for the About build number.',
        );
    }
    if (!nativePackage.releaseNotes?.trim()) {
        throw new Error(
            'Add releaseNotes to native/package.json before publishing.',
        );
    }
    const target = env.MACOS_RELEASE_TARGET || 'aarch64-apple-darwin';
    const arch = {
        'aarch64-apple-darwin': 'arm64',
        'x86_64-apple-darwin': 'x86_64',
    }[target];
    if (!arch) {
        throw new Error(
            'MACOS_RELEASE_TARGET must select Apple Silicon or Intel macOS.',
        );
    }
    const identity = env.APPLE_SIGNING_IDENTITY;
    if (
        !identity?.startsWith('Developer ID Application: ') ||
        !identity.endsWith(` (${appleTeamId})`) ||
        /[\r\n"]/.test(identity)
    ) {
        throw new Error(
            `A Developer ID Application identity for ${appleTeamId} is required.`,
        );
    }
    return {
        version: config.version,
        notes: nativePackage.releaseNotes,
        target,
        arch,
        filename: `KanbanGit-${config.version}-${target}.dmg`,
        updaterFilename: `KanbanGit-${config.version}-${target}.app.tar.gz`,
    };
}

export function execute(command, args) {
    const result = spawnSync(command, args, {
        encoding: 'utf8',
        maxBuffer: 16 * 1024 * 1024,
    });
    if (result.error || result.status !== 0) {
        throw new Error(
            `${command} failed (exit ${result.status ?? 'unknown'}). ${result.stderr || ''}`,
        );
    }
    return result.stdout?.trim() || result.stderr?.trim() || '';
}

export function verifyNotarizedApp(app, metadata, run = execute) {
    verifySignedMacosApp({
        app,
        version: metadata.version,
        step: (_label, command, args) => run(command, args),
    });
    const arch = run('lipo', [
        '-archs',
        join(app, 'Contents/MacOS/kanbangit-native'),
    ]).trim();
    if (arch !== metadata.arch) {
        throw new Error(
            'The app architecture does not match its download path.',
        );
    }
    run('xcrun', ['stapler', 'validate', app]);
    run('spctl', ['--assess', '--type', 'execute', '--verbose=2', app]);
}

export function packageNotarizedApp({
    env = process.env,
    directory = nativeDirectory,
    run = execute,
} = {}) {
    const metadata = releaseMetadata(env, directory);
    const root = join(directory, 'src-tauri/target');
    const app = join(
        root,
        metadata.target,
        'release/bundle/macos/KanbanGit.app',
    );
    verifyNotarizedApp(app, metadata, run);
    const releaseRoot = join(root, 'macos-release');
    const destination = join(
        releaseRoot,
        `${metadata.version}-${metadata.target}`,
    );
    if (existsSync(destination)) {
        throw new Error(
            'Release output already exists; start from a clean checkout.',
        );
    }
    mkdirSync(releaseRoot, { recursive: true });
    const staging = mkdtempSync(join(releaseRoot, '.pending-'));
    try {
        const archive = join(staging, metadata.filename);
        const bundle = join(root, metadata.target, 'release/bundle');
        copyFileSync(
            join(
                bundle,
                'dmg',
                `KanbanGit_${metadata.version}_${metadata.arch === 'arm64' ? 'aarch64' : 'x64'}.dmg`,
            ),
            archive,
        );
        const mounted = join(staging, 'mounted');
        mkdirSync(mounted);
        run('hdiutil', ['verify', archive]);
        run('hdiutil', [
            'attach',
            archive,
            '-readonly',
            '-nobrowse',
            '-mountpoint',
            mounted,
        ]);
        try {
            if (
                readlinkSync(join(mounted, 'Applications')) !== '/Applications'
            ) {
                throw new Error(
                    'DMG must contain the Applications installation link.',
                );
            }
            verifyNotarizedApp(join(mounted, 'KanbanGit.app'), metadata, run);
        } finally {
            run('hdiutil', ['detach', mounted]);
        }
        rmSync(mounted, { recursive: true, force: true });
        const updateArchive = join(staging, metadata.updaterFilename);
        copyFileSync(join(bundle, 'macos/KanbanGit.app.tar.gz'), updateArchive);
        copyFileSync(
            join(bundle, 'macos/KanbanGit.app.tar.gz.sig'),
            `${updateArchive}.sig`,
        );
        if (!readFileSync(`${updateArchive}.sig`, 'utf8').trim()) {
            throw new Error('The updater signature is missing.');
        }
        const extracted = join(staging, 'extracted');
        mkdirSync(extracted);
        run('tar', ['-xzf', updateArchive, '-C', extracted]);
        verifyNotarizedApp(join(extracted, 'KanbanGit.app'), metadata, run);
        rmSync(extracted, { recursive: true, force: true });
        const checksum = createHash('sha256')
            .update(readFileSync(archive))
            .digest('hex');
        for (const name of [metadata.filename, metadata.updaterFilename]) {
            const hash = createHash('sha256')
                .update(readFileSync(join(staging, name)))
                .digest('hex');
            writeFileSync(
                join(staging, `${name}.sha256`),
                `${hash}  ${name}\n`,
            );
        }
        renameSync(staging, destination);
        return { ...metadata, directory: destination, checksum };
    } finally {
        rmSync(staging, { recursive: true, force: true });
    }
}

if (
    process.argv[1] &&
    import.meta.url === pathToFileURL(resolve(process.argv[1])).href
) {
    try {
        let output;
        if (process.argv[2] === 'metadata') {
            output = releaseMetadata();
        } else if (process.argv[2] === 'package') {
            output = packageNotarizedApp();
        } else {
            throw new Error(
                'Use metadata or package. Building and notarizing are handled by tauri-action.',
            );
        }
        if (process.env.GITHUB_OUTPUT) {
            appendFileSync(
                process.env.GITHUB_OUTPUT,
                Object.entries(output)
                    .filter(([key]) => key !== 'notes')
                    .map(([key, value]) => `${key}=${value}\n`)
                    .join(''),
            );
        }
        console.log(JSON.stringify(output));
    } catch (error) {
        console.error(error.message);
        process.exitCode = 1;
    }
}