from __future__ import annotations

import argparse
import json
import sys
from pathlib import Path

import pytest

# Make fixtures importable.
sys.path.insert(0, str(Path(__file__).parent / "fixtures"))
from http_server import serve_dir  # noqa: E402

from metin_release.commands import diff_remote  # noqa: E402
from metin_release.workspace import Context  # noqa: E402


def _write_manifest(path: Path, hashes: list[str]) -> None:
    manifest = {
        "version": "v1",
        "created_at": "2026-04-14T00:00:00Z",
        "launcher": {"path": "Metin2Launcher.exe", "sha256": hashes[0], "size": 1},
        "files": [
            {"path": f"file{i}", "sha256": h, "size": 1}
            for i, h in enumerate(hashes[1:])
        ],
    }
    path.write_text(json.dumps(manifest, indent=2))


def test_diff_remote_reports_missing(tmp_path: Path):
    hashes = [
        "a" * 64,
        "b" * 64,
        "c" * 64,
    ]
    manifest = tmp_path / "manifest.json"
    _write_manifest(manifest, hashes)

    # Remote serves only two of the three blobs.
    remote = tmp_path / "remote"
    remote.mkdir()
    for h in hashes[:2]:
        d = remote / "files" / h[:2]
        d.mkdir(parents=True)
        (d / h).write_bytes(b"x")

    with serve_dir(remote) as base_url:
        args = argparse.Namespace(manifest=manifest, base_url=base_url, timeout=5.0)
        result = diff_remote.run(Context(), args)

    stats = result.data["stats"]
    assert stats["manifest_blob_count"] == 3
    assert stats["missing_blob_count"] == 1
    assert stats["missing_blobs"] == [hashes[2]]


def test_diff_remote_all_present(tmp_path: Path):
    hashes = ["d" * 64]
    manifest = tmp_path / "manifest.json"
    _write_manifest(manifest, hashes)

    remote = tmp_path / "remote"
    (remote / "files" / "dd").mkdir(parents=True)
    (remote / "files" / "dd" / hashes[0]).write_bytes(b"x")

    with serve_dir(remote) as base_url:
        args = argparse.Namespace(manifest=manifest, base_url=base_url, timeout=5.0)
        result = diff_remote.run(Context(), args)

    assert result.data["stats"]["missing_blob_count"] == 0