import XCTest
@testable import ReynaCLIHostCore

final class PythonLauncherTests: XCTestCase {
    func testConfiguredRuntimeUsesEnvironmentBeforeConfigAndDefaults() throws {
        let home = URL(fileURLWithPath: "/tmp/reyna-home")
        let config = [
            "REYNA_CLI_DIR": "/config/repo",
            "REYNA_CLI_PYTHON": "/config/python",
        ]
        let environment = [
            "REYNA_CLI_DIR": "/environment/repo",
            "REYNA_CLI_PYTHON": "/environment/python",
        ]

        let runtime = resolvePythonRuntime(
            homeDirectory: home,
            environment: environment,
            config: config,
            isExecutable: { path in path == "/environment/python" }
        )

        XCTAssertEqual(runtime.workingDirectory.path, "/environment/repo")
        XCTAssertEqual(runtime.python.path, "/environment/python")
    }

    func testConfiguredRuntimeFallsBackToSystemPythonWhenSelectedPythonMissing() throws {
        let runtime = resolvePythonRuntime(
            homeDirectory: URL(fileURLWithPath: "/tmp/reyna-home"),
            environment: [:],
            config: ["REYNA_CLI_DIR": "/config/repo", "REYNA_CLI_PYTHON": "/missing/python"],
            isExecutable: { _ in false }
        )

        XCTAssertEqual(runtime.workingDirectory.path, "/config/repo")
        XCTAssertEqual(runtime.python.path, "/usr/bin/python3")
    }

    func testPythonCommandRunsFixedCliModuleAndForwardsArguments() {
        let runtime = PythonRuntime(
            workingDirectory: URL(fileURLWithPath: "/repo"),
            python: URL(fileURLWithPath: "/repo/.venv/bin/python")
        )

        XCTAssertEqual(
            pythonCommand(runtime: runtime, forwardedArguments: ["local-services", "speech", "generate", "hello"]),
            ["/repo/.venv/bin/python", "-m", "reyna_cli.cli", "local-services", "speech", "generate", "hello"]
        )
    }

    func testPythonEnvironmentRemovesParentInterpreterOverrides() {
        let environment = pythonLaunchEnvironment(from: [
            "PATH": "/bin",
            "PYTHONHOME": "/wrong",
            "PYTHONPATH": "/wrong/site-packages",
            "VIRTUAL_ENV": "/wrong/.venv",
            "KEEP": "yes",
        ])

        XCTAssertNil(environment["PYTHONHOME"])
        XCTAssertNil(environment["PYTHONPATH"])
        XCTAssertNil(environment["VIRTUAL_ENV"])
        XCTAssertEqual(environment["PYTHONNOUSERSITE"], "1")
        XCTAssertEqual(environment["KEEP"], "yes")
    }

    func testConfigParserIgnoresCommentsBlankLinesAndQuotes() {
        let config = parsePythonRuntimeConfig("# comment\nREYNA_CLI_DIR = '/repo path'\n\nREYNA_CLI_PYTHON=\"/python\"\ninvalid\n")

        XCTAssertEqual(config["REYNA_CLI_DIR"], "/repo path")
        XCTAssertEqual(config["REYNA_CLI_PYTHON"], "/python")
        XCTAssertNil(config["invalid"])
    }
}