import os
import stat
import subprocess
from pathlib import Path


def test_validate_feed_script_changes_to_feedvalidator_and_forwards_args(
    tmp_path: Path,
) -> None:
    script_path = Path(__file__).resolve().parents[1] / "scripts" / "validate-feed"
    feedvalidator_dir = tmp_path / "feedvalidator"
    bin_dir = tmp_path / "bin"
    caller_dir = tmp_path / "caller"
    feed_path = caller_dir / "path" / "to" / "feed.rss"
    trace_dir = tmp_path / "trace"

    feedvalidator_dir.mkdir()
    bin_dir.mkdir()
    feed_path.parent.mkdir(parents=True)
    feed_path.write_text("<rss/>", encoding="utf-8")
    trace_dir.mkdir()

    uv_path = bin_dir / "uv"
    uv_path.write_text(
        """#!/bin/sh
printf '%s\\n' "$PWD" > "$TRACE_DIR/cwd"
printf '%s\\n' "$@" > "$TRACE_DIR/args"
printf 'validator output\\n'
""",
        encoding="utf-8",
    )
    uv_path.chmod(uv_path.stat().st_mode | stat.S_IXUSR)

    pager_path = bin_dir / "pager"
    pager_path.write_text(
        """#!/bin/sh
cat > "$TRACE_DIR/pager-input"
""",
        encoding="utf-8",
    )
    pager_path.chmod(pager_path.stat().st_mode | stat.S_IXUSR)

    env = os.environ.copy()
    env["FEEDVALIDATOR_DIR"] = str(feedvalidator_dir)
    env["PAGER"] = str(pager_path)
    env["PATH"] = f"{bin_dir}:{env['PATH']}"
    env["TRACE_DIR"] = str(trace_dir)

    subprocess.run(
        [str(script_path), "path/to/feed.rss", "--flag"],
        check=True,
        env=env,
        cwd=caller_dir,
    )

    assert (trace_dir / "cwd").read_text(encoding="utf-8").strip() == str(
        feedvalidator_dir
    )
    assert (trace_dir / "args").read_text(encoding="utf-8").splitlines() == [
        "run",
        "validate_feed.py",
        str(feed_path.resolve()),
        "--flag",
    ]
    assert (trace_dir / "pager-input").read_text(
        encoding="utf-8"
    ) == "validator output\n"