"""Integration checks against an isolated checkout; run python3 tooling/format/test.py."""
from pathlib import Path
import shutil
import subprocess
import tempfile

root = Path(__file__).resolve().parents[2]
with tempfile.TemporaryDirectory(prefix="palantir-test-") as temporary:
    fixture = Path(temporary)
    for name in ("pom.xml", ".mvn", "tooling/format"):
        source = root / name
        destination = fixture / name
        if source.is_dir():
            shutil.copytree(source, destination)
        else:
            shutil.copy2(source, destination)
    for name in ("agiledancers-be/src/main/java", "agiledancers-be/src/test/java", "ci/runner"):
        (fixture / name).mkdir(parents=True)
    source = fixture / "ci/runner/Example.java"
    original = "import java.util.List;\nclass Example{String text=\"héllo\";int value(){return 1;}}\n"
    source.write_text(original)

    def run(mode, success=True):
        result = subprocess.run(
            ["mvn", "-N", "-B", "-ntp", "exec:exec@format", "-Dformat.mode=" + mode],
            cwd=fixture, text=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
        assert (result.returncode == 0) == success, result.stdout
        return result.stdout

    output = run("check", False)
    assert "ci/runner/Example.java" in output and "mvn -N exec:exec@format" in output
    assert source.read_text() == original
    run("apply")
    formatted = source.read_text()
    assert "import java.util.List" not in formatted and "héllo" in formatted
    run("check")
    run("apply")
    assert source.read_text() == formatted
    # Force a full (uncached) second pass to prove engine idempotence.
    (fixture / "target/palantir-cache.properties").unlink()
    run("check")
    source.write_text(formatted + "class Broken { ??? }\n")
    invalid = source.read_bytes()
    output = run("apply", False)
    assert "ci/runner/Example.java" in output
    assert source.read_bytes() == invalid
    # A new file is discovered even after a successful cached check.
    source.write_text(formatted)
    extra = fixture / "ci/New.java"
    extra.write_text("class New{}")
    run("check", False)
    assert extra.read_text() == "class New{}"
    print("PASS: check is read-only, apply/check agree, imports, UTF-8, idempotence, parser errors, new files")