#!/usr/bin/env python3
"""
ObsiGate — Génération du manifeste de mise à jour Tauri (`latest.json`).

L'updater Tauri attend un document JSON de la forme :

    {
      "version": "2.3.0",
      "notes": "…",
      "pub_date": "2026-09-12T10:00:00Z",
      "platforms": {
        "windows-x86_64": {"signature": "<contenu .exe.sig>", "url": "<URL .exe>"},
        "linux-x86_64":   {"signature": "<contenu .AppImage.sig>", "url": "<URL .AppImage>"}
      }
    }

Ce module construit ce manifeste à partir des artefacts signés produits par
`cargo tauri build` (avec `bundle.createUpdaterArtifacts: true`) et de leurs
fichiers `.sig` (signature minisign).

Usage en ligne de commande :

    python scripts/updater_manifest.py --tag v2.3.0
    python scripts/updater_manifest.py --tag v2.3.0 --dry-run
"""

import argparse
import datetime
import json
import pathlib
import sys

DEFAULT_GITEA_URL = "https://git.dracodev.net"
DEFAULT_REPO = "Projets/ObsiGate"

# Plateforme Tauri -> liste de motifs de bundles candidats (par ordre de priorité).
# Le premier bundle disposant d'un fichier `<bundle>.sig` est retenu.
PLATFORM_BUNDLES: dict[str, list[str]] = {
    "windows-x86_64": [
        "target/**/release/bundle/nsis/*-setup.exe",
        "target/**/release/bundle/nsis/*.exe",
        "target/**/release/bundle/msi/*.msi",
    ],
    "linux-x86_64": [
        "target/**/release/bundle/appimage/*.AppImage",
        "target/**/release/bundle/deb/*.deb",
    ],
}


def read_version(tauri_conf: pathlib.Path) -> str:
    """Lit la version depuis `desktop/tauri.conf.json`."""
    with open(tauri_conf, "r", encoding="utf-8") as f:
        data = json.load(f)
    return str(data.get("version", "0.0.0"))


def _find_bundle_with_signature(desktop_dir: pathlib.Path, patterns: list[str]):
    """Retourne le premier bundle (le plus récent) disposant d'un `.sig`."""
    for pattern in patterns:
        matches = [p for p in desktop_dir.glob(pattern) if p.is_file()]
        if not matches:
            continue
        bundle = max(matches, key=lambda p: p.stat().st_mtime)
        sig = bundle.with_name(bundle.name + ".sig")
        if sig.is_file():
            return bundle, sig
    return None, None


def build_updater_manifest(
    desktop_dir,
    tag: str,
    gitea_url: str = DEFAULT_GITEA_URL,
    repo: str = DEFAULT_REPO,
    notes: str = "",
    pub_date: str | None = None,
) -> dict | None:
    """Construit le manifeste `latest.json` à partir des artefacts signés.

    Retourne `None` si aucun artefact signé n'est trouvé.
    """
    desktop_dir = pathlib.Path(desktop_dir)
    tauri_conf = desktop_dir / "tauri.conf.json"
    version = read_version(tauri_conf) if tauri_conf.exists() else "0.0.0"

    base_url = f"{gitea_url.rstrip('/')}/{repo.strip('/')}/releases/download/{tag}"
    platforms: dict[str, dict[str, str]] = {}

    for platform, patterns in PLATFORM_BUNDLES.items():
        bundle, sig = _find_bundle_with_signature(desktop_dir, patterns)
        if bundle is None or sig is None:
            continue
        platforms[platform] = {
            "signature": sig.read_text(encoding="utf-8").strip(),
            "url": f"{base_url}/{bundle.name}",
        }

    if not platforms:
        return None

    if pub_date is None:
        pub_date = datetime.datetime.now(datetime.timezone.utc).strftime(
            "%Y-%m-%dT%H:%M:%SZ"
        )

    return {
        "version": version,
        "notes": notes,
        "pub_date": pub_date,
        "platforms": platforms,
    }


def main() -> int:
    if hasattr(sys.stdout, "reconfigure"):
        try:
            sys.stdout.reconfigure(encoding="utf-8")
        except Exception:
            pass

    parser = argparse.ArgumentParser(
        description="Générer le manifeste de mise à jour Tauri (latest.json)."
    )
    parser.add_argument("--tag", "-t", help="Tag de version (ex: v2.3.0)")
    parser.add_argument("--gitea-url", default=DEFAULT_GITEA_URL)
    parser.add_argument("--repo", default=DEFAULT_REPO)
    parser.add_argument("--notes", default="", help="Notes de version")
    parser.add_argument(
        "--desktop-dir",
        default=None,
        help="Dossier desktop/ (défaut: <racine>/desktop)",
    )
    parser.add_argument(
        "--output",
        default=None,
        help="Fichier de sortie (défaut: <desktop>/latest.json)",
    )
    parser.add_argument("--dry-run", action="store_true", help="Afficher sans écrire")

    args = parser.parse_args()

    root_dir = pathlib.Path(__file__).resolve().parent.parent
    desktop_dir = pathlib.Path(args.desktop_dir) if args.desktop_dir else root_dir / "desktop"
    output = pathlib.Path(args.output) if args.output else desktop_dir / "latest.json"

    tag = args.tag
    if not tag:
        version = read_version(desktop_dir / "tauri.conf.json")
        tag = f"v{version}" if not version.startswith("v") else version

    manifest = build_updater_manifest(
        desktop_dir, tag, args.gitea_url, args.repo, notes=args.notes
    )

    if manifest is None:
        print("⚠️ Aucun artefact signé (.sig) trouvé — manifeste non généré.")
        print("💡 Build d'abord avec la clé updater définie :")
        print("   - Windows : .\\desktop\\build-windows.bat")
        print("   - Linux   : ./desktop/build-linux.sh")
        return 1

    content = json.dumps(manifest, indent=2, ensure_ascii=False) + "\n"

    if args.dry_run:
        print(content)
        print(f"🧪 Dry-run : rien écrit ({output})")
        return 0

    output.parent.mkdir(parents=True, exist_ok=True)
    output.write_text(content, encoding="utf-8")
    print(f"✅ Manifeste écrit : {output}")
    print(f"   Version    : {manifest['version']}")
    print(f"   Plateformes: {', '.join(manifest['platforms'])}")
    return 0


if __name__ == "__main__":
    sys.exit(main())