"""Build portable zip package: bililive-touhou-tts-portable.zip

Usage:
    python build.py

Output: dist/bililive-touhou-tts-portable.zip
"""

import os
import shutil
import subprocess
import sys
import zipfile
from pathlib import Path

ROOT = Path(__file__).parent
DIST = ROOT / "dist"
BUILD_DIR = DIST / "portable"


def step(msg: str) -> None:
    print(f"\n=== {msg} ===")


def safe_copy_tree(src: Path, dst: Path, ignore_patterns: tuple = ()) -> None:
    """Copy directory tree, skipping symlinks/recursion."""
    if dst.exists():
        shutil.rmtree(dst, ignore_errors=True)
    dst.mkdir(parents=True, exist_ok=True)

    to_visit = [(src, dst)]
    while to_visit:
        s, d = to_visit.pop()
        try:
            for entry in s.iterdir():
                if entry.name.startswith(".") and entry.name != ".npmignore":
                    continue
                if entry.name in ignore_patterns:
                    continue
                if entry.name == "__pycache__":
                    continue

                target = d / entry.name

                if entry.is_symlink():
                    continue  # skip symlinks entirely

                if entry.is_dir():
                    if target.exists():
                        try:
                            shutil.rmtree(target, ignore_errors=True)
                        except OSError:
                            continue
                    target.mkdir(parents=True, exist_ok=True)
                    to_visit.append((entry, target))
                else:
                    try:
                        shutil.copy2(entry, target)
                    except OSError:
                        pass  # skip unreadable files
        except OSError:
            pass  # skip unreadable dirs


def main() -> int:
    DIST.mkdir(exist_ok=True)
    if BUILD_DIR.exists():
        print("  Cleaning previous build...")
        for item in BUILD_DIR.iterdir():
            try:
                if item.is_dir():
                    shutil.rmtree(item, ignore_errors=True)
                else:
                    item.unlink(missing_ok=True)
            except OSError:
                pass
    BUILD_DIR.mkdir(parents=True, exist_ok=True)

    # ── 1. PyInstaller ─────────────────────────────────────────────────
    step("Building Python EXE with PyInstaller")
    subprocess.run(
        [
            sys.executable, "-m", "PyInstaller",
            "--onedir",
            "--name", "bililive-tts",
            "--add-data", f"{ROOT / 'static'}{os.pathsep}static",
            "--hidden-import", "blivedm",
            "--hidden-import", "blivedm.clients",
            "--hidden-import", "blivedm.clients.web",
            "--hidden-import", "blivedm.clients.ws_base",
            "--hidden-import", "blivedm.handlers",
            "--hidden-import", "blivedm.models",
            "--hidden-import", "blivedm.models.web",
            "--hidden-import", "blivedm.utils",
            "--hidden-import", "pypinyin",
            "--hidden-import", "sounddevice",
            "--hidden-import", "soundfile",
            "--hidden-import", "numpy",
            "--hidden-import", "aiohttp",
            "--hidden-import", "Brotli",
            "--hidden-import", "pure_protobuf",
            "--hidden-import", "yarl",
            "--hidden-import", "chinese2kana",
            "--hidden-import", "pinyin2kana_data",
            "--hidden-import", "audio_player",
            "--hidden-import", "danmaku_handler",
            "--hidden-import", "tts",
            "--hidden-import", "bili_login",
            "--noconfirm",
            "--distpath", str(BUILD_DIR / "app"),
            str(ROOT / "server.py"),
        ],
    )
    exe = BUILD_DIR / "app" / "bililive-tts" / "bililive-tts.exe"
    internal = BUILD_DIR / "app" / "bililive-tts" / "_internal"
    base_lib = internal / "base_library.zip"
    if not exe.exists() or not base_lib.exists():
        print(f"ERROR: PyInstaller build incomplete: exe={exe.exists()}, base_library.zip={base_lib.exists()}")
        return 1
    print(f"  OK: {exe} ({exe.stat().st_size // 1024 // 1024} MB)")

    # ── 2. Portable Node.js ────────────────────────────────────────────
    step("Copying portable Node.js")
    node_src = Path(os.environ.get("NODE_PATH", r"C:\nvm4w\nodejs\node.exe"))
    shutil.copy2(node_src, BUILD_DIR / "node.exe")
    print(f"  OK: node.exe")

    # ── 3. aquestalk.js (only what's needed) ───────────────────────────
    step("Copying aquestalk.js runtime")
    aq_src = ROOT / "aquestalk.js"
    aq_dst = BUILD_DIR / "aquestalk.js"

    print("  dist/ ...")
    safe_copy_tree(aq_src / "dist", aq_dst / "dist")
    print("  voices/ ...")
    safe_copy_tree(aq_src / "voices", aq_dst / "voices")
    print("  node_modules/ (symlink-safe) ...")
    safe_copy_tree(aq_src / "node_modules", aq_dst / "node_modules",
                   ignore_patterns=("bililive-touhou-tts",))

    # ── 4. node_modules (if any) ───────────────────────────────────────
    if (ROOT / "node_modules").exists():
        step("Copying node_modules")
        safe_copy_tree(ROOT / "node_modules", BUILD_DIR / "node_modules")

    # ── 5. Bridge + config ─────────────────────────────────────────────
    step("Copying bridge files")
    shutil.copy2(ROOT / "tts_bridge.js", BUILD_DIR / "tts_bridge.js")
    shutil.copy2(ROOT / "english-kana-matcher.js", BUILD_DIR / "english-kana-matcher.js")
    shutil.copy2(ROOT / "package.json", BUILD_DIR / "package.json")
    if (ROOT / "event_rules.json").exists():
        shutil.copy2(ROOT / "event_rules.json", BUILD_DIR / "event_rules.json")
    print("  OK")

    # ── 6. Launcher ────────────────────────────────────────────────────
    step("Creating launcher")
    bat = BUILD_DIR / "start.bat"
    bat.write_text(
        '@echo off\r\n'
        'cd /d "%~dp0"\r\n'
        'start "" "app\\bililive-tts\\bililive-tts.exe"\r\n',
        encoding="ascii",
    )
    print(f"  OK")

    # ── 7. Zip ─────────────────────────────────────────────────────────
    step("Creating zip")
    zip_path = DIST / "bililive-touhou-tts-portable.zip"
    with zipfile.ZipFile(zip_path, "w", zipfile.ZIP_DEFLATED) as zf:
        for file in BUILD_DIR.rglob("*"):
            if ".git" in file.parts or "__pycache__" in file.parts:
                continue
            if file.is_dir():
                continue
            arcname = str(file.relative_to(BUILD_DIR))
            zf.write(file, arcname)

    size_mb = zip_path.stat().st_size / (1024 * 1024)
    print(f"\n  Done: {zip_path} ({size_mb:.1f} MB)")
    return 0


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