"""Exercise the Windows bootstrap in disposable projects without installing host tools."""

import os
from pathlib import Path
import shutil
import subprocess
import sys

import pytest

ROOT = Path(__file__).resolve().parents[2]
pytestmark = pytest.mark.skipif(
    sys.platform != "win32" or not shutil.which("uv"), reason="Windows and uv required"
)


@pytest.fixture
def project(tmp_path):
    # Import fixtures let the final smoke check run without downloading project dependencies.
    path = tmp_path / "source with spaces!"
    path.mkdir()
    (path / "pyproject.toml").write_text(
        '[project]\nname="bootstrap-fixture"\nversion="0.1.0"\nrequires-python=">=3.12"\ndependencies=[]\n'
    )
    for name in ("artemis", "uvicorn", "fastapi", "langchain_openai"):
        (path / f"{name}.py").write_text("")
    subprocess.run(["uv", "lock", "--offline"], cwd=path, check=True, capture_output=True)
    return path


def run_bootstrap(
    project, *, missing_uv=False, installer_failure=False, sync_failure=False, mirror_index=""
):
    script = project / "check.ps1"
    script.write_text(
        """
$ErrorActionPreference = 'Continue'
$realUv = (Get-Command uv).Source
. $env:BOOTSTRAP_SCRIPT
. (Join-Path (Split-Path $env:BOOTSTRAP_SCRIPT -Parent) 'download_config.ps1')
if ($env:TEST_MIRROR) { $script:ArtemisDownloads = @{ python_index = $env:TEST_MIRROR } }
$script:uvInstalled = $env:SIMULATE_MISSING_UV -ne '1'
function Test-CommandExists { param($Command); return $script:uvInstalled }
function Update-EnvironmentPath {}
function Invoke-DownloadFile {
    param($Uri, $OutFile, $TimeoutSec)
    if ($Uri -ne 'https://astral.sh/uv/install.ps1') { throw 'Unexpected installer source' }
    Set-Content -LiteralPath $OutFile -Value '# fixture installer'
    return $true
}
function powershell.exe {
    Write-Host 'INSTALLER_CALLED'
    if ($env:SIMULATE_INSTALL_FAILURE -eq '1') { $global:LASTEXITCODE = 25; return }
    $script:uvInstalled = $true
    $global:LASTEXITCODE = 0
}
function uv {
    if ($env:SIMULATE_SYNC_FAILURE -eq '1' -and $args[0] -eq 'sync') {
        $global:LASTEXITCODE = 9
        return
    }
    & $realUv @args
}
try {
    $python = Initialize-ArtemisPython -ProjectRoot $PSScriptRoot
    Write-Host "PYTHON_READY=$python"
    exit 0
} catch { Write-Host "EXPECTED_ERROR=$_"; exit 1 }
""",
        encoding="ascii",
    )
    env = dict(os.environ)
    env.update(
        BOOTSTRAP_SCRIPT=str(ROOT / "scripts/bootstrap_python.ps1"),
        SIMULATE_MISSING_UV=str(int(missing_uv)),
        SIMULATE_INSTALL_FAILURE=str(int(installer_failure)),
        SIMULATE_SYNC_FAILURE=str(int(sync_failure)),
        UV_OFFLINE="0" if mirror_index else "1",
        TEST_MIRROR=mirror_index,
    )
    return subprocess.run(
        ["powershell.exe", "-NoProfile", "-ExecutionPolicy", "Bypass", "-File", str(script)],
        env=env,
        capture_output=True,
        text=True,
        timeout=60,
    )


def test_first_setup_and_repeat_reuse_environment(project):
    first = run_bootstrap(project, missing_uv=True)
    assert first.returncode == 0, first.stdout + first.stderr
    assert "INSTALLER_CALLED" in first.stdout
    assert "Creating .venv" in first.stdout
    config = project / ".venv/pyvenv.cfg"
    before = config.stat().st_mtime_ns
    second = run_bootstrap(project)
    assert second.returncode == 0, second.stdout + second.stderr
    assert "INSTALLER_CALLED" not in second.stdout
    assert "Reusing the existing" in second.stdout
    assert "dependencies are already ready" in second.stdout
    assert config.stat().st_mtime_ns == before


def test_installer_failure_stops_before_environment_creation(project):
    result = run_bootstrap(project, missing_uv=True, installer_failure=True)
    assert result.returncode == 1
    assert "uv installation failed" in result.stdout
    assert not (project / ".venv").exists()


def test_dependency_failure_stops_before_launch(project):
    result = run_bootstrap(project, sync_failure=True)
    assert result.returncode == 1
    assert "Dependency installation failed" in result.stdout
    assert "PYTHON_READY=" not in result.stdout


def test_incomplete_environment_is_preserved(project):
    (project / ".venv").mkdir()
    sentinel = project / ".venv/keep.txt"
    sentinel.write_text("existing data")
    result = run_bootstrap(project)
    assert result.returncode == 1
    assert "incomplete" in result.stdout
    assert sentinel.read_text() == "existing data"


@pytest.mark.parametrize("exit_code", [0, 7])
def test_batch_preserves_exit_code_and_handles_space_and_exclamation_paths(tmp_path, exit_code):
    root = tmp_path / "source with spaces!"
    (root / "scripts").mkdir(parents=True)
    shutil.copy2(ROOT / "start.bat", root / "start.bat")
    (root / "scripts/start.ps1").write_text(
        "param([switch]$SetupOnly)\n"
        "if (-not $SetupOnly) { exit 19 }\n"
        "if ((Get-Location).Path -ne (Split-Path $PSScriptRoot -Parent)) { exit 20 }\n"
        f"exit {exit_code}\n",
        encoding="ascii",
    )
    result = subprocess.run(
        ["cmd.exe", "/d", "/c", "call", str(root / "start.bat"), "-SetupOnly"],
        cwd=tmp_path,
        env={**os.environ, "ARTEMIS_NO_PAUSE": "1"},
        capture_output=True,
        timeout=30,
    )
    assert result.returncode == exit_code, result.stdout + result.stderr