from __future__ import annotations

from pathlib import Path

from headroom.install.models import DeploymentManifest
from headroom.install.runtime import (
    _clear_pid,
    _read_pid,
    build_runtime_command,
    resolve_headroom_command,
    runtime_status,
    stop_runtime,
)


def test_build_runtime_command_for_docker_includes_deployment_env(
    monkeypatch, tmp_path: Path
) -> None:
    monkeypatch.setattr(Path, "home", lambda: tmp_path)
    manifest = DeploymentManifest(
        profile="default",
        preset="persistent-docker",
        runtime_kind="docker",
        supervisor_kind="none",
        scope="user",
        provider_mode="manual",
        targets=["claude"],
        port=8787,
        host="127.0.0.1",
        backend="anthropic",
        image="ghcr.io/chopratejas/headroom:latest",
        base_env={"HEADROOM_PORT": "8787"},
        proxy_args=["--host", "127.0.0.1", "--port", "8787"],
    )

    command = build_runtime_command(manifest)

    joined = " ".join(command)
    assert command[:3] == ["docker", "run", "--rm"]
    assert "HEADROOM_DEPLOYMENT_PROFILE=default" in joined
    assert "HEADROOM_DEPLOYMENT_PRESET=persistent-docker" in joined
    assert "127.0.0.1:8787:8787" in joined
    assert "ghcr.io/chopratejas/headroom:latest" in command
    # Canonical Headroom filesystem contract (issue #175) forwarded into
    # the container.
    assert "HEADROOM_WORKSPACE_DIR=/tmp/headroom-home/.headroom" in command
    assert "HEADROOM_CONFIG_DIR=/tmp/headroom-home/.headroom/config" in command


def test_build_runtime_command_for_docker_matches_wrapper_parity(
    monkeypatch, tmp_path: Path
) -> None:
    monkeypatch.setattr(Path, "home", lambda: tmp_path)
    monkeypatch.setenv("ANTHROPIC_API_KEY", "test-key")
    monkeypatch.setenv("OPENAI_API_KEY", "test-openai")
    manifest = DeploymentManifest(
        profile="default",
        preset="persistent-docker",
        runtime_kind="docker",
        supervisor_kind="none",
        scope="user",
        provider_mode="manual",
        targets=["claude"],
        port=8787,
        host="127.0.0.1",
        backend="anthropic",
        image="ghcr.io/chopratejas/headroom:latest",
        base_env={"HEADROOM_PORT": "8787"},
        proxy_args=["--host", "127.0.0.1", "--port", "8787"],
    )

    command = build_runtime_command(manifest)

    assert (tmp_path / ".headroom").is_dir()
    assert (tmp_path / ".claude").is_dir()
    assert (tmp_path / ".codex").is_dir()
    assert (tmp_path / ".gemini").is_dir()
    assert "--env" in command
    joined = " ".join(command)
    assert "ANTHROPIC_API_KEY" in joined
    assert "OPENAI_API_KEY" in joined


def test_resolve_headroom_command_prefers_headroom_binary(monkeypatch) -> None:
    monkeypatch.setattr(
        "shutil.which", lambda name: "/usr/bin/headroom" if name == "headroom" else None
    )

    assert resolve_headroom_command() == ["/usr/bin/headroom"]


def test_read_pid_handles_invalid_content(monkeypatch, tmp_path: Path) -> None:
    monkeypatch.setattr(Path, "home", lambda: tmp_path)
    pid_file = tmp_path / ".headroom" / "deploy" / "default" / "runner.pid"
    pid_file.parent.mkdir(parents=True)
    pid_file.write_text("not-a-pid", encoding="utf-8")

    assert _read_pid("default") is None
    _clear_pid("default")
    assert not pid_file.exists()


def test_stop_runtime_for_docker_stops_and_removes_container(monkeypatch) -> None:
    calls: list[list[str]] = []
    manifest = DeploymentManifest(
        profile="default",
        preset="persistent-docker",
        runtime_kind="docker",
        supervisor_kind="none",
        scope="user",
        provider_mode="manual",
        targets=[],
        port=8787,
        host="127.0.0.1",
        backend="anthropic",
        container_name="headroom-default",
    )

    monkeypatch.setattr(
        "headroom.install.runtime.subprocess.run",
        lambda command, **kwargs: calls.append(command),
    )

    stop_runtime(manifest)

    assert calls == [
        ["docker", "stop", "headroom-default"],
        ["docker", "rm", "-f", "headroom-default"],
    ]


def test_runtime_status_reads_container_and_pid_state(monkeypatch, tmp_path: Path) -> None:
    docker_manifest = DeploymentManifest(
        profile="default",
        preset="persistent-docker",
        runtime_kind="docker",
        supervisor_kind="none",
        scope="user",
        provider_mode="manual",
        targets=[],
        port=8787,
        host="127.0.0.1",
        backend="anthropic",
        container_name="headroom-default",
    )

    class Result:
        def __init__(self, stdout: str = "") -> None:
            self.stdout = stdout

    monkeypatch.setattr(
        "headroom.install.runtime.subprocess.run",
        lambda command, **kwargs: Result(stdout="headroom-default\n"),
    )
    assert runtime_status(docker_manifest) == "running"

    monkeypatch.setattr(Path, "home", lambda: tmp_path)
    pid_file = tmp_path / ".headroom" / "deploy" / "default" / "runner.pid"
    pid_file.parent.mkdir(parents=True)
    pid_file.write_text("123", encoding="utf-8")
    monkeypatch.setattr("headroom.install.runtime.os.kill", lambda pid, sig: None)
    python_manifest = DeploymentManifest(
        profile="default",
        preset="persistent-service",
        runtime_kind="python",
        supervisor_kind="service",
        scope="user",
        provider_mode="manual",
        targets=[],
        port=8787,
        host="127.0.0.1",
        backend="anthropic",
    )
    assert runtime_status(python_manifest) == "running"