// CompileGateTests.swift
// Wraps scripts/compile-gate.sh as a test so CI can run the compile gate via
// `swift test`. Gated behind SWIFT_GTK_GEN_COMPILE_GATE=1 so the default
// `swift test` run stays fast and does not require system GIR files.

import Foundation
import Testing

/// Integration test that runs the compile gate: generate a tier's monorepo
/// and require the generated package to build with zero errors.
///
/// Enable with `SWIFT_GTK_GEN_COMPILE_GATE=1 swift test`; select a tier with
/// `SWIFT_GTK_GEN_GATE_TIER` (defaults to `"1"`, accepts `"all"`).
@Suite struct CompileGateTests {
    /// Whether the gate is enabled for this test run.
    private nonisolated static var gateEnabled: Bool {
        ProcessInfo.processInfo.environment["SWIFT_GTK_GEN_COMPILE_GATE"] == "1"
    }

    /// The tier argument passed to the gate script.
    private nonisolated static var tier: String {
        ProcessInfo.processInfo.environment["SWIFT_GTK_GEN_GATE_TIER"] ?? "1"
    }

    @Test(.enabled(if: gateEnabled, "set SWIFT_GTK_GEN_COMPILE_GATE=1 to run the compile gate"))
    func generatedPackageCompiles() throws {
        // #filePath = .../Tests/IntegrationTests/CompileGateTests.swift
        let packageRoot = URL(fileURLWithPath: #filePath)
            .deletingLastPathComponent()  // IntegrationTests
            .deletingLastPathComponent()  // Tests
            .deletingLastPathComponent()  // package root
        let script = packageRoot.appendingPathComponent("scripts/compile-gate.sh")

        let process = Process()
        process.executableURL = script
        process.arguments = [Self.tier]
        process.currentDirectoryURL = packageRoot
        try process.run()
        process.waitUntilExit()

        #expect(process.terminationStatus == 0, "compile gate failed for tier \(Self.tier)")
    }
}