#!/usr/bin/env python3

from __future__ import annotations

import argparse
import gzip
import logging
import shutil
import subprocess
from pathlib import Path

logging.basicConfig(level="INFO", format="%(message)s")

CONFIG_VALUES = {
    "APP_ID": "org.gajim.Gajim",
    "APP_NAME": "Gajim",
    "APP_ICON_NAME": "org.gajim.Gajim",
    "FLATPAK": "False",
    "FLATPAK_NIGHTLY": "False",
}

CONFIG = Path("gajim/config.py.in")
METAINFO = Path("data/org.gajim.Gajim.metainfo.xml.in")
DESKTOP = Path("data/org.gajim.Gajim.desktop.in")
METADATA = Path("dist/metadata")

MAN_FILES = [Path("data/gajim.1"), Path("data/gajim-remote.1")]

META_FILES = [
    (Path("data/org.gajim.Gajim.desktop"), "--desktop"),
    (Path("data/org.gajim.Gajim.metainfo.xml"), "--xml"),
]

ICONS = [
    Path("gajim/data/icons/hicolor/scalable/apps/gajim.svg"),
    Path("gajim/data/icons/hicolor/scalable/apps/gajim-symbolic.svg"),
    Path("gajim/data/icons/hicolor/scalable/status/gajim-status-away.svg"),
    Path("gajim/data/icons/hicolor/scalable/status/gajim-status-chat.svg"),
    Path("gajim/data/icons/hicolor/scalable/status/gajim-status-connecting.svg"),
    Path("gajim/data/icons/hicolor/scalable/status/gajim-status-dnd.svg"),
    Path("gajim/data/icons/hicolor/scalable/status/gajim-status-message-new.svg"),
    Path("gajim/data/icons/hicolor/scalable/status/gajim-status-offline.svg"),
    Path("gajim/data/icons/hicolor/scalable/status/gajim-status-online.svg"),
    Path("gajim/data/icons/hicolor/scalable/status/gajim-status-xa.svg"),
]

INSTALL_FILES = {
    "gajim-remote.1.gz": "share/man/man1",
    "gajim.1.gz": "share/man/man1",
    "org.gajim.Gajim.desktop": "share/applications",
    "org.gajim.Gajim.metainfo.xml": "share/metainfo",
    "org.gajim.Gajim-symbolic.svg": "share/icons/hicolor/scalable/apps",
    "org.gajim.Gajim.svg": "share/icons/hicolor/scalable/apps",
}

INSTALL_FLATPAK_ICONS = {
    "org.gajim.Gajim-status-away.svg": "share/icons/hicolor/scalable/apps",
    "org.gajim.Gajim-status-chat.svg": "share/icons/hicolor/scalable/apps",
    "org.gajim.Gajim-status-connecting.svg": "share/icons/hicolor/scalable/apps",
    "org.gajim.Gajim-status-dnd.svg": "share/icons/hicolor/scalable/apps",
    "org.gajim.Gajim-status-message-new.svg": "share/icons/hicolor/scalable/apps",
    "org.gajim.Gajim-status-offline.svg": "share/icons/hicolor/scalable/apps",
    "org.gajim.Gajim-status-online.svg": "share/icons/hicolor/scalable/apps",
    "org.gajim.Gajim-status-xa.svg": "share/icons/hicolor/scalable/apps",
}


def configure_file(path: Path, values: dict[str, str]) -> None:
    logging.info("Configure %s", path)
    content = path.read_text()
    for old, new in values.items():
        content = content.replace(f"@{old}@", new)
    path = path.with_suffix("")
    path.write_text(content)


def configure_flatpak() -> None:
    CONFIG_VALUES["FLATPAK"] = "True"


def configure_flatpak_nightly() -> None:
    CONFIG_VALUES["APP_ID"] = "org.gajim.Gajim.Devel"
    CONFIG_VALUES["APP_NAME"] = "Gajim (Nightly)"
    CONFIG_VALUES["APP_ICON_NAME"] = "org.gajim.Gajim.Devel"
    CONFIG_VALUES["FLATPAK"] = "True"
    CONFIG_VALUES["FLATPAK_NIGHTLY"] = "True"


def build_man() -> None:
    # Build man files in target path

    for man_path in MAN_FILES:
        data = man_path.read_bytes()
        man_file_name = man_path.name

        man_out_path = METADATA / f"{man_file_name}.gz"
        logging.info("Compress %s >> %s", man_file_name, man_out_path)

        with gzip.GzipFile(man_out_path, "wb", mtime=0) as f_out:
            f_out.write(data)


def build_meta() -> None:
    for file_path, option in META_FILES:
        out_path = METADATA / file_path.name

        logging.info("Compile %s >> %s", file_path, out_path)

        subprocess.run(
            [
                "msgfmt",
                option,
                "-d",
                "po",
                "--template",
                str(file_path),
                "-o",
                str(out_path),
            ],
            check=True,
        )


def build_app_icons() -> None:
    for file_path in ICONS:
        icon_name = file_path.name.replace("gajim", "org.gajim.Gajim")
        out_path = METADATA / icon_name

        logging.info("Copy %s >> %s", file_path, out_path)
        shutil.copy2(file_path, out_path)


def build_translations() -> None:
    # Compile translation files and place them into "gajim/data/locale"

    source_dir = Path.cwd()
    translation_dir = source_dir / "po"
    locale_dir = source_dir / "gajim" / "data" / "locale"

    langs = sorted([lang.stem for lang in translation_dir.glob("*.po")])

    for lang in langs:
        po_file = source_dir / "po" / f"{lang}.po"
        mo_file = locale_dir / lang / "LC_MESSAGES" / "gajim.mo"
        mo_file.parent.mkdir(parents=True, exist_ok=True)

        logging.info("Compile %s >> %s", po_file, mo_file)

        subprocess.run(["msgfmt", str(po_file), "-o", str(mo_file)], check=True)


def install(*, prefix: Path, files: dict[str, str]) -> None:
    for file, path in files.items():
        src = METADATA / file
        dest_dir = prefix / path
        logging.info("Copy %s to %s", src, dest_dir)
        if not dest_dir.exists():
            dest_dir.mkdir(parents=True)
        shutil.copy(src, dest_dir / file)


def rename(*, prefix: Path, files: dict[str, str], new_app_id: str) -> None:
    for file_name, path in files.items():
        dest_dir = prefix / path
        file = dest_dir / file_name
        new_file_name = file_name.replace("org.gajim.Gajim", new_app_id)
        new_file = dest_dir / new_file_name
        logging.info("Rename File %s to %s", file, new_file)
        file.rename(new_file)


def cmd_build(args: argparse.Namespace) -> None:
    if args.dist == "win":
        build_translations()
        return

    if args.dist == "flatpak":
        configure_flatpak()
    elif args.dist == "flatpak-nightly":
        configure_flatpak_nightly()

    configure_file(CONFIG, CONFIG_VALUES)
    configure_file(METAINFO, CONFIG_VALUES)
    configure_file(DESKTOP, CONFIG_VALUES)

    METADATA.mkdir(parents=True, exist_ok=True)

    build_translations()
    build_man()
    build_meta()
    build_app_icons()


def cmd_install(args: argparse.Namespace) -> None:
    install(prefix=args.prefix, files=INSTALL_FILES)

    if args.dist.startswith("flatpak"):
        install(prefix=args.prefix, files=INSTALL_FLATPAK_ICONS)

    if args.dist == "flatpak-nightly":
        rename(
            prefix=args.prefix, files=INSTALL_FILES, new_app_id="org.gajim.Gajim.Devel"
        )
        rename(
            prefix=args.prefix,
            files=INSTALL_FLATPAK_ICONS,
            new_app_id="org.gajim.Gajim.Devel",
        )


if __name__ == "__main__":
    parser = argparse.ArgumentParser()

    subparsers = parser.add_subparsers(
        required=True, metavar="commands", dest="command"
    )

    build_parser = subparsers.add_parser("build", help="Build Gajim")
    build_parser.add_argument(
        "--dist",
        choices=["unix", "flatpak", "flatpak-nightly", "win"],
        default="unix",
        help="Distribution",
    )
    build_parser.set_defaults(func=cmd_build)

    install_parser = subparsers.add_parser("install", help="Install metadata files")
    install_parser.add_argument(
        "--dist",
        choices=["unix", "flatpak", "flatpak-nightly"],
        default="unix",
        help="Distribution",
    )
    install_parser.add_argument(
        "--prefix",
        type=Path,
        default="/usr",
        help='The path prefix for installation (e.g. "/usr")',
    )
    install_parser.set_defaults(func=cmd_install)

    args = parser.parse_args()
    args.func(args)
