#!/usr/bin/env python3
"""Writes the Homebrew Channel manifest for a built ipk, and a custom-repo
index that wraps it.

The manifest (out/manifest.json) is one app entry: id, ipkUrl, ipkHash, and so
on. It is what you submit to webosbrew/apps-repo to get into the official
store.

The repo index (out/repo.json) is `{"packages": [...]}`, which is the format
the Homebrew Channel's own "Add repository" dialog expects (Settings ->
Repositories -> Add repository). Host it anywhere static, paste its URL in,
and the app shows up in Browse — no submission, no review, no shell access to
the TV at all.

Each package entry embeds the full manifest under a "manifest" key. That is
not decoration: the app's details screen (DetailsPanel.refresh(), read
straight from its source) only ever uses entry.manifest directly, or fetches
entry.manifestUrl if entry.manifest is absent. Ship a repo.json without either
one and the details view calls resolveURL(undefined, ...), throws, and spins
on "Loading" forever with no error shown. Embedding beats a manifestUrl
because there is only one file to keep in sync.

    python3 tools/make-manifest.py \\
        --base-url https://git.example/you/lgtv-audio-cap/releases/download/v1.0.0

--base-url must be the exact release download URL, tag and all — the icon and
ipk links are absolute, so a tag typo (v1.0.0 vs 1.0.0) 404s silently rather
than falling back to anything.

Defaults to the newest ipk in out/ and writes out/manifest.json + out/repo.json.
"""

import argparse
import glob
import hashlib
import json
import os
import sys

HERE = os.path.dirname(os.path.abspath(__file__))
ROOT = os.path.join(HERE, os.pardir)

SOURCE_URL = "https://git.crylia.de/Crylia/lgtv_audio_cap"


def newest_ipk(directory):
    matches = sorted(glob.glob(os.path.join(directory, "*.ipk")),
                     key=os.path.getmtime, reverse=True)
    return matches[0] if matches else None


def sha256(path):
    digest = hashlib.sha256()
    with open(path, "rb") as fh:
        for block in iter(lambda: fh.read(1 << 20), b""):
            digest.update(block)
    return digest.hexdigest()


def main():
    parser = argparse.ArgumentParser(description=__doc__.split("\n")[0])
    parser.add_argument("--ipk", default=None, help="path to the ipk")
    parser.add_argument("--base-url", default=None,
                        help="URL the ipk and icon will be served from")
    parser.add_argument("--source-url", default=SOURCE_URL,
                        help="project page shown in the Homebrew Channel")
    parser.add_argument("--out", default=os.path.join(ROOT, "out", "manifest.json"))
    parser.add_argument("--repo-out", default=os.path.join(ROOT, "out", "repo.json"),
                        help="path for the custom-repo index (set to '' to skip)")
    args = parser.parse_args()

    appinfo = json.load(open(os.path.join(ROOT, "frontend", "appinfo.json")))

    ipk = args.ipk or newest_ipk(os.path.join(ROOT, "out"))
    if not ipk or not os.path.exists(ipk):
        print("no ipk found; run ./tools/build.sh first", file=sys.stderr)
        return 1

    name = os.path.basename(ipk)
    base = (args.base_url or "").rstrip("/")

    manifest = {
        "id": appinfo["id"],
        "version": appinfo["version"],
        "type": appinfo.get("type", "web"),
        "title": appinfo.get("title", appinfo["id"]),
        "appDescription": appinfo.get("appDescription", ""),
        "iconUri": base + "/icon.png" if base else "icon.png",
        "sourceUrl": args.source_url,
        # The service reads the TV's audio devices, which are root-only. The
        # Homebrew Channel uses this to elevate the service at install time.
        "rootRequired": True,
        "ipkUrl": base + "/" + name if base else name,
        "ipkHash": {"sha256": sha256(ipk)},
        "ipkSize": os.path.getsize(ipk),
    }

    os.makedirs(os.path.dirname(args.out), exist_ok=True)
    with open(args.out, "w") as fh:
        json.dump(manifest, fh, indent=2)
        fh.write("\n")
    print(json.dumps(manifest, indent=2))
    print("\nwrote %s" % os.path.relpath(args.out, ROOT), file=sys.stderr)

    if args.repo_out:
        # The grid view (BrowserPanel) reads id/title/iconUri straight off the
        # package entry. The details view (DetailsPanel) only ever looks at
        # entry.manifest directly, or fetches entry.manifestUrl if that is
        # missing — never the entry's own top-level fields. Skipping
        # manifestUrl (a second file, a second URL to keep in sync) by
        # embedding the manifest here means DetailsPanel takes its
        # already-ready fast path and never issues that fetch at all.
        package_entry = {
            "id": manifest["id"],
            "title": manifest["title"],
            "iconUri": manifest["iconUri"],
            "shortDescription": manifest["appDescription"],
            "manifest": manifest,
        }
        os.makedirs(os.path.dirname(args.repo_out) or ".", exist_ok=True)
        with open(args.repo_out, "w") as fh:
            json.dump({"packages": [package_entry]}, fh, indent=2)
            fh.write("\n")
        print("wrote %s" % os.path.relpath(args.repo_out, ROOT), file=sys.stderr)

    if not base:
        print("note: no --base-url given, so ipkUrl and iconUri are relative",
              file=sys.stderr)
    return 0


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