/**
 * npm registry availability checking utilities.
 * Used to verify a version is available on npm before attempting upgrade.
 */
const PACKAGE_SPEC = '@agentuity/cli';
/** Default timeout for install (`bun add -g`) subprocess calls (30 seconds) */
const INSTALL_TIMEOUT_MS = 30_000;
/**
 * Run a command via Bun.spawn with a timeout that kills the process.
 * Returns { exitCode, stdout, stderr } similar to Bun's $ shell result.
 */
export async function spawnWithTimeout(cmd, options) {
    const proc = Bun.spawn(cmd, {
        cwd: options.cwd,
        stdout: 'pipe',
        stderr: 'pipe',
    });
    let timedOut = false;
    const timer = setTimeout(() => {
        timedOut = true;
        proc.kill();
    }, options.timeout);
    try {
        const [exitCode, stdoutBytes, stderrBytes] = await Promise.all([
            proc.exited,
            new Response(proc.stdout).arrayBuffer(),
            new Response(proc.stderr).arrayBuffer(),
        ]);
        if (timedOut) {
            throw new Error(`Command timed out after ${options.timeout}ms: ${cmd.join(' ')}`);
        }
        return {
            exitCode,
            stdout: Buffer.from(stdoutBytes),
            stderr: Buffer.from(stderrBytes),
        };
    }
    finally {
        clearTimeout(timer);
    }
}
/**
 * Sentinel error thrown exclusively by withTimeout so the retry loop can
 * distinguish a genuine timeout from other failures (e.g. permission errors).
 */
class TimeoutError extends Error {
    constructor(description, timeoutMs) {
        super(`${description} timed out after ${timeoutMs}ms`);
        this.name = 'TimeoutError';
    }
}
/**
 * Race a promise against a timeout. Unlike spawnWithTimeout (which kills a process),
 * this is a generic wrapper for any async operation (e.g. the installFn callback).
 *
 * Throws a {@link TimeoutError} (not a plain Error) so callers can tell
 * timeouts apart from other exceptions.
 */
async function withTimeout(promise, timeoutMs, description) {
    let timer;
    const timeoutPromise = new Promise((_, reject) => {
        timer = setTimeout(() => reject(new TimeoutError(description, timeoutMs)), timeoutMs);
    });
    try {
        return await Promise.race([promise, timeoutPromise]);
    }
    finally {
        clearTimeout(timer);
    }
}
/**
 * Check if a specific version of @agentuity/cli is available on the npm registry.
 *
 * @param version - Version to check (with or without 'v' prefix)
 * @returns true if version is available, false otherwise
 */
export async function isVersionAvailableOnNpm(version, options) {
    const normalizedVersion = version.replace(/^v/, '');
    const timeoutMs = options?.timeoutMs ?? 10_000;
    try {
        const response = await fetch(`https://registry.npmjs.org/${PACKAGE_SPEC}/${normalizedVersion}`, { signal: AbortSignal.timeout(timeoutMs) });
        if (!response.ok)
            return false;
        const info = (await response.json());
        return info.version === normalizedVersion;
    }
    catch {
        return false;
    }
}
/**
 * Quick check if a version is available on npm.
 * Used for implicit version checks (auto-upgrade flow).
 *
 * @param version - Version to check (with or without 'v' prefix)
 * @returns true if version is available, false if unavailable or error
 */
export async function isVersionAvailableOnNpmQuick(version) {
    return isVersionAvailableOnNpm(version, { timeoutMs: 1_000 });
}
/**
 * Wait for a version to become available on npm with exponential backoff.
 *
 * @param version - Version to wait for (with or without 'v' prefix)
 * @param options - Configuration options
 * @returns true if version became available, false if timed out
 */
export async function waitForNpmAvailability(version, options = {}) {
    const { maxAttempts = 6, initialDelayMs = 2000, maxDelayMs = 10000, onRetry } = options;
    // First check - no delay
    if (await isVersionAvailableOnNpm(version)) {
        return true;
    }
    // Retry with exponential backoff
    let delay = initialDelayMs;
    for (let attempt = 1; attempt < maxAttempts; attempt++) {
        onRetry?.(attempt, delay);
        await new Promise((resolve) => setTimeout(resolve, delay));
        if (await isVersionAvailableOnNpm(version)) {
            return true;
        }
        delay = Math.min(Math.round(delay * 1.5), maxDelayMs);
    }
    return false;
}
/**
 * Patterns in bun's stderr that indicate a resolution/CDN propagation failure
 * (as opposed to a permanent install error like permissions or disk space).
 */
const RESOLUTION_ERROR_PATTERNS = [/failed to resolve/i, /no version matching/i];
/**
 * Check whether a bun install failure is a transient resolution error
 * caused by npm CDN propagation delays.
 */
export function isResolutionError(stderr) {
    return RESOLUTION_ERROR_PATTERNS.some((pattern) => pattern.test(stderr));
}
/**
 * Run an install function and retry on transient resolution errors with
 * exponential backoff. This covers the window (~2 min) where npm CDN nodes
 * have not yet propagated a newly-published version.
 *
 * Total wait with defaults: 5 + 10 + 20 + 30 + 30 + 30 = 125 s ≈ 2 min
 *
 * @param installFn - Async function that performs the install and returns exitCode + stderr
 * @param options - Retry configuration
 * @returns The successful result (exitCode 0)
 * @throws Error if all retries are exhausted or a non-resolution error occurs
 */
export async function installWithRetry(installFn, options = {}) {
    const { maxAttempts = 7, initialDelayMs = 5000, maxDelayMs = 30000, multiplier = 2, onRetry, } = options;
    let delay = initialDelayMs;
    for (let attempt = 1; attempt <= maxAttempts; attempt++) {
        let result;
        try {
            result = await withTimeout(installFn(), INSTALL_TIMEOUT_MS, 'Install command');
        }
        catch (error) {
            // Only retry on timeouts — non-timeout errors (permissions, disk, etc.) are fatal
            if (!(error instanceof TimeoutError)) {
                throw error;
            }
            if (attempt === maxAttempts) {
                throw error;
            }
            onRetry?.(attempt, delay);
            await new Promise((resolve) => setTimeout(resolve, delay));
            delay = Math.min(Math.round(delay * multiplier), maxDelayMs);
            continue;
        }
        if (result.exitCode === 0) {
            return result;
        }
        const stderr = result.stderr.toString();
        // Only retry on resolution/propagation errors — bail immediately for anything else
        if (!isResolutionError(stderr)) {
            throw new Error(stderr);
        }
        // Last attempt exhausted — throw
        if (attempt === maxAttempts) {
            throw new Error(stderr);
        }
        onRetry?.(attempt, delay);
        await new Promise((resolve) => setTimeout(resolve, delay));
        delay = Math.min(Math.round(delay * multiplier), maxDelayMs);
    }
    // Unreachable, but satisfies TypeScript
    throw new Error('Install failed after retries');
}
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