"""Convert themes from convert-themes/registry.json into src/tui/themes/*.json"""
import json
import re
from pathlib import Path

REGISTRY_PATH = Path("convert-themes/registry.json")
OUTPUT_DIR = Path("src/tui/themes")

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

if not REGISTRY_PATH.exists():
    print(f"Error: {REGISTRY_PATH} not found.")
    exit(1)

with open(REGISTRY_PATH, "r", encoding="utf-8") as f:
    data = json.load(f)

themes_list = data.get("themes", [])
converted_count = 0

for item in themes_list:
    name = item.get("name")
    if not name:
        continue

    dark = item.get("dark") or item.get("light") or {}
    if not dark:
        continue

    theme_id = re.sub(r'[^a-z0-9\-]', '', name.lower().replace(' ', '-'))
    if not theme_id:
        continue

    background = dark.get("mSurfaceVariant") or dark.get("mSurface") or "#1e1e1e"
    surface = dark.get("mSurface") or "#252526"
    primary = dark.get("mPrimary") or "#3b82f6"
    primary_text = dark.get("mOnPrimary") or "#ffffff"
    secondary = dark.get("mSecondary") or "#64748b"
    accent = dark.get("mTertiary") or dark.get("mHover") or primary
    folder_header = accent
    folder_text = dark.get("mOnTertiary") or dark.get("mOnHover") or "#ffffff"

    theme_dict = {
        "id": theme_id,
        "name": name,
        "background": background,
        "surface": surface,
        "primary": primary,
        "primary_text": primary_text,
        "secondary": secondary,
        "accent": accent,
        "folder_header": folder_header,
        "folder_text": folder_text
    }

    out_file = OUTPUT_DIR / f"{theme_id}.json"
    with open(out_file, "w", encoding="utf-8") as f_out:
        json.dump(theme_dict, f_out, indent=2)
    converted_count += 1

print(f"Successfully converted {converted_count} themes to {OUTPUT_DIR}/!")