"""Paths and metadata shared by the desktop and Android build tools."""

import json
from pathlib import Path
import subprocess

ROOT = Path(__file__).resolve().parents[1]


def validate_assets():
    """Require the checked-in Gaia payload instead of a private profile copy."""
    apps = ROOT / "assets/webapps"
    required = [
        ROOT / "assets/settings-defaults.json",
        apps / "system.gaiamobile.org/index.html",
        apps / "homescreen.gaiamobile.org/index.html",
        apps / "default_theme.gaiamobile.org/manifest.webapp",
    ]
    missing = [str(path.relative_to(ROOT)) for path in required if not path.is_file()]
    if missing:
        raise RuntimeError("Incomplete checkout; missing Gaia files: " + ", ".join(missing))
    manifests = sorted(apps.glob("*/manifest.webapp"))
    if not manifests:
        raise RuntimeError("No installed Gaia manifests in assets/webapps")
    for manifest in manifests:
        json.loads(manifest.read_text())
    json.loads((ROOT / "assets/settings-defaults.json").read_text())
    return len(manifests)


def build_info():
    """Read this checkout's revision; archives without .git report it as unknown."""
    unknown = {"revision": "unknown", "timestamp": 0, "dirty": None}
    if not (ROOT / ".git").exists():
        return unknown
    try:
        revision, timestamp = (
            subprocess.check_output(
                ["git", "show", "-s", "--format=%H%n%ct", "HEAD"],
                cwd=ROOT,
                text=True,
                stderr=subprocess.DEVNULL,
            )
            .strip()
            .splitlines()
        )
        changes = subprocess.check_output(
            ["git", "status", "--porcelain", "--untracked-files=normal"],
            cwd=ROOT,
            text=True,
        )
    except (OSError, subprocess.CalledProcessError, ValueError):
        return unknown
    return {"revision": revision, "timestamp": int(timestamp), "dirty": bool(changes)}


def release_info():
    """One product revision, with independently verified platform engine packages."""
    release = json.loads((ROOT / "release.json").read_text())
    release.setdefault("version", f'{release["gaia"]}-{release["channel"]}.{release["revision"]}')
    release["desktopEngine"] = json.loads((ROOT / "engine-lock.json").read_text())["version"]
    engine, build_id = release["geckoview"].rsplit(".", 1)
    release["androidEngine"] = engine
    release["androidEngineBuildID"] = build_id
    if not release["androidVersionCode"] > 4:
        raise ValueError("Android versionCode must preserve upgrades from Preview 4")
    return release