"""Unit tests for the winimage subpackage (autounattend, iso_patch)."""

from __future__ import annotations

import subprocess
from pathlib import Path
from typing import Any

import click
import pytest

from ci_orchestrator.winimage import autounattend as au
from ci_orchestrator.winimage import iso_patch as ip
from ci_orchestrator.winimage import massgrave as mg

# ── massgrave resolver ───────────────────────────────────────────────────────

_SAMPLE_MD = """\
## Windows Server 2025
Build - 26100.32860 (May 2026)
| English  | x64  | [en-us_windows_server_2025_updated_may_2026_x64_dvd_abc.iso](https://zerofs.link/f/AAA/)|
| Italian  | x64  | [it-it_windows_server_2025_updated_may_2026_x64_dvd_abc.iso](https://zerofs.link/f/BBB/)|
Build - 26100.1742
| English  | x64  | [X23-81958_26100.1742_en-us.iso](https://oemsoc.download.prss.microsoft.com/x.iso?t=z)|
## Windows Server 2022
| English  | x64  | [en-us_windows_server_2022.iso](https://zerofs.link/f/CCC/)|
"""


def test_resolve_ws2025_picks_newest_english() -> None:
    i = mg.resolve_ws2025(_SAMPLE_MD, lang="English", arch="x64")
    assert i.build == "26100.32860"
    assert i.filename.startswith("en-us_windows_server_2025_updated")
    assert i.url == "https://zerofs.link/f/AAA/"


def test_resolve_ws2025_italian() -> None:
    assert mg.resolve_ws2025(_SAMPLE_MD, lang="Italian").url == "https://zerofs.link/f/BBB/"


def test_resolve_ws2025_not_found() -> None:
    with pytest.raises(click.ClickException, match="No Windows Server 2025"):
        mg.resolve_ws2025(_SAMPLE_MD, lang="Klingon")


def test_ws2025_section_missing() -> None:
    with pytest.raises(click.ClickException, match="section not found"):
        mg._ws2025_section("## Windows Server 2022\nnothing here")

# ── autounattend ───────────────────────────────────────────────────────────


def test_render_autounattend_no_placeholder() -> None:
    xml = au.render_autounattend(au.WinUnattendParams())
    assert "{{" not in xml and "}}" not in xml
    assert "TVRH6-WHNXV-R9WG3-9XRFY-MY832" in xml


def test_render_post_install_substitutes() -> None:
    ps = au.render_post_install(au.WinUnattendParams(admin_password="Secret123"))
    assert "Secret123" in ps and "{{" not in ps
    assert "install_complete.flag" in ps


def test_validate_computer_name_ok() -> None:
    au.validate_computer_name("WINBUILD-2025")


@pytest.mark.parametrize("bad", ["bad name", "toolongcomputername01", "has_underscore"])
def test_validate_computer_name_bad(bad: str) -> None:
    with pytest.raises(ValueError, match="invalid computer name"):
        au.validate_computer_name(bad)


def test_apply_detects_leftover() -> None:
    with pytest.raises(ValueError, match="unsubstituted placeholder"):
        au._apply("hello {{MISSING}}", {})


# ── iso_patch ──────────────────────────────────────────────────────────────


def test_read_volid_fallback(monkeypatch: pytest.MonkeyPatch, tmp_path: Path) -> None:
    monkeypatch.setattr(ip.shutil, "which", lambda _n: None)
    iso = tmp_path / "x.iso"
    iso.write_bytes(b"x")
    assert ip._read_volid(iso) == "WINSERVER"


def test_check_free_space_raises(monkeypatch: pytest.MonkeyPatch, tmp_path: Path) -> None:
    iso = tmp_path / "x.iso"
    iso.write_bytes(b"x" * 1000)
    monkeypatch.setattr(
        ip.shutil, "disk_usage",
        lambda _p: type("DU", (), {"free": 10})(),
    )
    with pytest.raises(click.ClickException, match="insufficient space"):
        ip._check_free_space(iso, tmp_path)


def test_patch_iso_happy(monkeypatch: pytest.MonkeyPatch, tmp_path: Path) -> None:
    base = tmp_path / "base.iso"
    base.write_bytes(b"x" * 1000)
    out = tmp_path / "out.iso"
    monkeypatch.setattr(ip, "_require_xorriso", lambda: "xorriso")
    monkeypatch.setattr(ip, "_require_7z", lambda: "7z")
    monkeypatch.setattr(ip, "_read_volid", lambda _p: "WINSERVER")
    monkeypatch.setattr(ip, "_check_free_space", lambda *_a: None)

    def fake_run(argv: list[str], **_kw: Any) -> subprocess.CompletedProcess[str]:
        # simulate 7z extraction creating the efi boot file in the tree
        if argv[0] == "7z" and "x" in argv:
            outflag = next(a for a in argv if a.startswith("-o"))
            tree = Path(outflag[2:])
            boot = tree / ip._EFI_BOOT_NOPROMPT
            boot.parent.mkdir(parents=True, exist_ok=True)
            boot.write_bytes(b"boot")
        elif "mkisofs" in argv:
            out.write_bytes(b"iso")
        return subprocess.CompletedProcess(argv, 0, "", "")

    monkeypatch.setattr(ip.subprocess, "run", fake_run)
    result = ip.patch_iso(
        base, autounattend_xml="<x/>", post_install_ps1="echo hi", out_iso=out,
        work_dir=tmp_path,
    )
    assert result == out and out.is_file()


def test_iso_has_root_file(monkeypatch: pytest.MonkeyPatch, tmp_path: Path) -> None:
    monkeypatch.setattr(ip, "_require_7z", lambda: "7z")
    iso = tmp_path / "x.iso"
    iso.write_bytes(b"x")

    def fake_run(argv: list[str], **_k: Any) -> subprocess.CompletedProcess[str]:
        out = "2026 .... 6813 autounattend.xml\n" if "-i!autounattend.xml" in argv else ""
        return subprocess.CompletedProcess(argv, 0, out, "")

    monkeypatch.setattr(ip.subprocess, "run", fake_run)
    assert ip.iso_has_root_file(iso, "autounattend.xml") is True
    assert ip.iso_has_root_file(iso, "missing.xml") is False


def test_patch_iso_missing_efi_boot(monkeypatch: pytest.MonkeyPatch, tmp_path: Path) -> None:
    base = tmp_path / "base.iso"
    base.write_bytes(b"x" * 1000)
    monkeypatch.setattr(ip, "_require_xorriso", lambda: "xorriso")
    monkeypatch.setattr(ip, "_require_7z", lambda: "7z")
    monkeypatch.setattr(ip, "_check_free_space", lambda *_a: None)
    monkeypatch.setattr(
        ip.subprocess, "run",
        lambda argv, **_k: subprocess.CompletedProcess(argv, 0, "", ""),
    )
    with pytest.raises(click.ClickException, match="no-prompt"):
        ip.patch_iso(
            base, autounattend_xml="<x/>", post_install_ps1="x",
            out_iso=tmp_path / "out.iso", work_dir=tmp_path,
        )