import Testing
import Foundation

@Test("CLI produces help output")
func testCLIHelp() throws {
    let process = Process()
    let binPath = findBinary() ?? failBinaryNotFound()
    process.executableURL = binPath
    process.arguments = ["--help"]
    let output = try process.runAndCapture()
    #expect(output.contains("Usage:"))
    #expect(output.contains("--monorepo-config"))
    #expect(output.contains("--output"))
    #expect(output.contains("--skip-report"))
}

private func findBinary() -> URL? {
    let candidates = [
        URL(fileURLWithPath: ".build/debug/generator"),
        URL(fileURLWithPath: ".build/release/generator"),
    ]
    return candidates.first { FileManager.default.fileExists(atPath: $0.path) }
}


private func failBinaryNotFound() -> URL {
    Issue.record("generator binary not found at any expected path")
    return URL(fileURLWithPath: "/nonexistent")
}

extension Process {
    func runAndCapture() throws -> String {
        let stdout = Pipe()
        standardOutput = stdout
        standardError = Pipe()
        try run()
        waitUntilExit()
        let data = stdout.fileHandleForReading.readDataToEndOfFile()
        return String(data: data, encoding: .utf8) ?? ""
    }
}