#!/usr/bin/env python3
"""Regression checks for the release-pin guard; no Gradle execution or downloads."""
from pathlib import Path
import shutil
import subprocess
import sys
import tempfile

ROOT = Path(__file__).resolve().parent.parent
passed = 0
cases = [
    ("baseline", None, None, None, True),
    ("stale Gradle distribution", "gradle/wrapper/gradle-wrapper.properties", "gradle-8.14.5-bin", "gradle-9.7.1-bin", False),
    ("wrong daemon JVM", "gradle/gradle-daemon-jvm.properties", "toolchainVersion=17", "toolchainVersion=25", False),
    ("duplicate JVM alias", "build.gradle.kts", "alias(libs.plugins.kotlin.jvm) apply false",
     "alias(libs.plugins.kotlin.jvm) apply false\n    alias(libs.plugins.kotlin.jvm) apply false", False),
    ("catalog maps two aliases to JVM", "gradle/libs.versions.toml", 'id = "org.jetbrains.kotlin.android"',
     'id = "org.jetbrains.kotlin.jvm"', False),
    ("extra direct plugin request", "build.gradle.kts", "plugins {",
     'plugins {\n    id("org.jetbrains.kotlin.jvm") apply false', False),
    ("stale shell bootstrap", "scripts/bootstrap-wrapper.sh", "v8.14.5/", "v8.13.0/", False),
    ("stale Windows bootstrap", "scripts/bootstrap-wrapper.ps1", "v8.14.5/", "v8.13.0/", False),
]
for name, relative, old, new, expect_success in cases:
    with tempfile.TemporaryDirectory(prefix="fileworkbench-build-config-") as work:
        target = Path(work) / "project"
        shutil.copytree(ROOT, target, ignore=shutil.ignore_patterns("out", "build", ".gradle", ".git", ".idea", "local.properties", "__pycache__"))
        if relative:
            file = target / relative
            source = file.read_text(encoding="utf-8")
            assert old in source, name + ": expected fixture content missing"
            file.write_text(source.replace(old, new, 1), encoding="utf-8")
        else:
            # Local IDE/SDK state is legitimate on the developer's machine.
            # The source-package check must not accidentally prohibit ordinary builds.
            (target / "local.properties").write_text("sdk.dir=/example/local/sdk\n", encoding="utf-8")
            (target / ".idea").mkdir()
        result = subprocess.run([sys.executable, str(target / "scripts/check-build-config.py")],
                                text=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
        if (result.returncode == 0) != expect_success:
            print(result.stdout)
            raise SystemExit("FAIL " + name)
        passed += 1
        print("PASS " + name + (" accepted" if expect_success else " rejected"))
print(f"Build-guard regression: {passed}/{len(cases)} cases passed. Not a Gradle build.")