"""
novelWriter – Assets
====================

This file is a part of novelWriter
Copyright (C) 2025 Veronica Berglyd Olsen and novelWriter contributors

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
"""
from __future__ import annotations

import argparse
import os
import subprocess
import sys
import zipfile

from pathlib import Path

from utils.common import ROOT_DIR, writeFile


def buildPdfManual(args: argparse.Namespace | None = None) -> None:
    """This function will build the documentation as manual.pdf."""
    print("")
    print("Building PDF Manual")
    print("===================")
    print("")

    buildFile = ROOT_DIR / "docs" / "build" / "latex" / "manual.pdf"
    finalFile = ROOT_DIR / "novelwriter" / "assets" / "manual.pdf"
    finalFile.unlink(missing_ok=True)

    try:
        subprocess.call(["make", "clean"], cwd="docs")
        exCode = subprocess.call(["make", "latexpdf"], cwd="docs")
        if exCode == 0:
            print("")
            buildFile.rename(finalFile)
        else:
            raise Exception(f"Build returned error code {exCode}")

        print("PDF manual build: OK")
        print("")

    except Exception as exc:
        print("PDF manual build: FAILED")
        print("")
        print(str(exc))
        print("")
        print("Dependencies:")
        print(" * pip install sphinx")
        print(" * Package latexmk")
        print(" * LaTeX build system")
        print("")
        print(" On Debian/Ubuntu, install: python3-sphinx latexmk texlive texlive-latex-extra")
        print("")
        sys.exit(1)

    if not finalFile.is_file():
        print("No output file was found!")
        print("")
        sys.exit(1)

    return


def buildSampleZip(args: argparse.Namespace | None = None) -> None:
    """Bundle the sample project into a single zip file to be saved into
    the novelwriter/assets folder for further bundling into builds.
    """
    print("")
    print("Building Sample ZIP File")
    print("========================")
    print("")

    srcSample = ROOT_DIR / "sample"
    dstSample = ROOT_DIR / "novelwriter" / "assets" / "sample.zip"

    if srcSample.is_dir():
        dstSample.unlink(missing_ok=True)
        with zipfile.ZipFile(dstSample, "w") as zipObj:
            print("Compressing: nwProject.nwx")
            zipObj.write(srcSample / "nwProject.nwx", "nwProject.nwx")
            for doc in (srcSample / "content").iterdir():
                print(f"Compressing: content/{doc.name}")
                zipObj.write(doc, f"content/{doc.name}")

    else:
        print("Error: Could not find sample project source directory.")
        sys.exit(1)

    print("")
    print(f"Built file: {dstSample}")
    print("")

    return


def importI18nUpdates(args: argparse.Namespace) -> None:
    """Import new translation files from a zip file."""
    print("")
    print("Import Updated Translations")
    print("===========================")
    print("")

    fileName = Path(args.file).absolute()
    if not fileName.is_file():
        print("File not found ...")
        sys.exit(1)

    dstPath = ROOT_DIR / "novelwriter" / "assets" / "i18n"
    srcPath = ROOT_DIR / "i18n"

    print(f"Loading file: {fileName}")
    with zipfile.ZipFile(fileName) as zipObj:
        for item in zipObj.namelist():
            if item.startswith("nw_") and item.endswith(".ts"):
                zipObj.extract(item, srcPath)
                print(f"Extracted: {item} > {srcPath / item}")
            elif item.startswith("project_") and item.endswith(".json"):
                zipObj.extract(item, dstPath)
                print(f"Extracted: {item} > {dstPath / item}")
            else:
                print(f"Skipped: {item}")

    print("")

    return


def updateTranslationSources(args: argparse.Namespace) -> None:
    """Build the lang.ts files for Qt Linguist."""
    print("")
    print("Building Qt Translation Files")
    print("=============================")

    try:
        from PyQt6.lupdate.lupdate import lupdate
    except ImportError:
        print("ERROR: This command requires lupdate from PyQt6")
        print("On Debian/Ubuntu, install: pyqt6-dev-tools")
        sys.exit(1)

    print("")
    print("Scanning Source Tree:")
    print("")

    sources = list((ROOT_DIR / "novelwriter").glob("**/*.py"))
    sources.insert(0, ROOT_DIR / "i18n" / "qtbase.py")
    for source in sources:
        print(source.relative_to(ROOT_DIR))

    print("")
    print("TS Files to Update:")
    print("")

    translations = []
    for item in [Path(str(f)).absolute() for f in args.files]:
        if not (item.name.startswith("nw_") and item.suffix == ".ts"):
            print(f"Skipped: {item}")
            continue

        if item.is_file():
            translations.append(item)
            print(f"Added: {item}")
        elif item.exists():
            continue
        else:  # Create an empty new language file
            langCode = item.name[3:-3]
            writeFile(item, (
                "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"
                "<!DOCTYPE TS>\n"
                f"<TS version=\"2.0\" language=\"{langCode}\" sourcelanguage=\"en_GB\"/>\n"
            ))
            translations.append(item)
            print(f"Created: {item}")

    print("")
    print("Updating Language Files:")
    print("")

    lupdate(
        sources=[str(f) for f in sources],
        translation_files=[str(f) for f in translations],
        no_obsolete=True,
        no_summary=False,
    )

    print("")

    return


def buildTranslationAssets(args: argparse.Namespace | None = None) -> None:
    """Build the lang.qm files for Qt Linguist."""
    print("")
    print("Building Qt Localisation Files")
    print("==============================")

    print("")
    print("TS Files to Build:")
    print("")

    srcDir = ROOT_DIR / "i18n"
    dstDir = ROOT_DIR / "novelwriter" / "assets" / "i18n"

    srcList = []
    for item in srcDir.iterdir():
        if item.is_file() and item.suffix == ".ts" and item.name != "nw_base.ts":
            srcList.append(item)
            print(item)

    print("")
    print("Building Translation Files:")
    print("")

    try:
        subprocess.call(["lrelease", "-verbose", *srcList])
    except Exception as exc:
        print("Qt Linguist tools seem to be missing")
        print("On Debian/Ubuntu, install: qttools5-dev-tools")
        print(str(exc))
        sys.exit(1)

    print("")
    print("Moving QM Files to Assets")
    print("")

    dstRel = dstDir.relative_to(ROOT_DIR)
    for item in srcDir.iterdir():
        if item.is_file() and item.suffix == ".qm":
            item.rename(dstDir / item.name)
            print(f"Moved: {item.relative_to(ROOT_DIR)} -> {dstRel / item.name}")

    print("")

    return


def updateDocsTranslationSources(args: argparse.Namespace) -> None:
    """Build the documentation .po files."""
    print("")
    print("Building Docs Translation Files")
    print("===============================")
    print("")

    docsDir = ROOT_DIR / "docs"
    locsDir = ROOT_DIR / "docs" / "source" / "locales"
    locsDir.mkdir(exist_ok=True)

    print("Generating POT Files")
    subprocess.call(["make", "gettext"], cwd=docsDir)
    print("")

    lang = args.lang
    update = []
    if lang == ["all"]:
        update = [i.stem for i in locsDir.iterdir() if i.is_dir()]
    else:
        update = lang

    print("Generating PO Files")
    print("Languages: ", update)
    print("")

    for code in update:
        subprocess.call(["sphinx-intl", "update", "-p", "build/gettext", "-l", code], cwd=docsDir)
        print("")

    print("Done")
    print("")

    return


def buildDocsTranslationAssets(args: argparse.Namespace | None = None) -> None:
    """Build the documentation i18n PDF files."""
    from PyQt6.QtCore import QLocale

    print("")
    print("Building Docs Manuals")
    print("=====================")
    print("")

    docsDir = ROOT_DIR / "docs"
    locsDir = ROOT_DIR / "docs" / "source" / "locales"
    pdfFile = ROOT_DIR / "docs" / "build" / "latex" / "manual.pdf"
    locsDir.mkdir(exist_ok=True)

    lang = args.lang if args else ["all"]
    build = []
    if lang == ["all"]:
        build = [i.stem for i in locsDir.iterdir() if i.is_dir()]
    else:
        build = lang

    for code in build:
        data = (locsDir / f"authors_{code}.conf").read_text(encoding="utf-8")
        authors = [x for x in data.splitlines() if x and not x.startswith("#")]
        env = os.environ.copy()
        env["SPHINX_I18N_AUTHORS"] = ", ".join(authors)
        exCode = subprocess.call(
            f"make -e SPHINXOPTS=\"-D language='{code}'\" clean latexpdf",
            cwd=docsDir, env=env, shell=True
        )
        if exCode == 0:
            print("")
            name = f"manual_{QLocale(code).name()}.pdf"
            pdfFile.rename(ROOT_DIR / "novelwriter" / "assets" / name)
        else:
            raise Exception(f"Build returned error code {exCode}")

    print("")

    return


def cleanBuiltAssets(args: argparse.Namespace | None = None) -> None:
    """Remove assets built by this script."""
    print("")
    print("Removing Built Assets")
    print("=====================")
    print("")

    assets = [ROOT_DIR / "novelwriter" / "assets" / "sample.zip"]
    assets.extend((ROOT_DIR / "novelwriter" / "assets").glob("manual*.pdf"))
    assets.extend((ROOT_DIR / "novelwriter" / "assets" / "i18n").glob("*.qm"))
    for asset in assets:
        if asset.is_file():
            asset.unlink()
            print(f"Deleted: {asset.relative_to(ROOT_DIR)}")

    print("")

    return


def buildAllAssets(args: argparse.Namespace) -> None:
    """Build all assets."""
    cleanBuiltAssets()
    buildPdfManual()
    buildSampleZip()
    buildTranslationAssets()
    buildDocsTranslationAssets()
    return