"""Generate self-contained remote packages from the maintained board profiles."""
import argparse
from pathlib import Path
import re

ROOT = Path(__file__).resolve().parents[1]
REPO = 'https://github.com/MaxGramser/homeassistant_espscreen'
REFS = {'cyd': 'main', 'guition': 'main'}

def generate(board, text=None):
    source = ROOT / ('home-like-2432s028.yaml' if board == 'cyd' else 'guition-4848s040.yaml')
    s = source.read_text() if text is None else text
    # The owner's wizard YAML supplies wifi/API/OTA credentials. No shared keys.
    s = re.sub(r'^  encryption:\n    key: !secret api_encryption_key\n', '', s, flags=re.M)
    s = re.sub(r'^ota:\n.*?(?=^\w)', '', s, flags=re.M | re.S)
    s = re.sub(r'^wifi:\n.*?(?=^\w)', '', s, flags=re.M | re.S)
    # Fonts are fetched over HTTPS; the headers come with the external component.
    components = '[xpt2046, smart_display]' if board == 'cyd' else '[smart_display]'
    external = f'''external_components:
  - source:
      type: git
      url: {REPO}.git
      ref: {REFS[board]}
      path: components
    refresh: 0s
    components: {components}

'''
    s = re.sub(r'^external_components:\n.*?(?=^\w)', lambda m: external, s, flags=re.M | re.S)
    s = re.sub(r'file: ["\']fonts/([^"\']+)["\']', lambda m: 'file: "https://raw.githubusercontent.com/MaxGramser/homeassistant_espscreen/main/fonts/' + m[1] + '"', s)
    # A screen gets its values from ESP Screen Manager while it runs, entity changes included:
    # a fixed Home Assistant subscription in a board profile is a leftover.
    for section in ['sensor', 'text_sensor']:
        match = re.search(r'^' + section + r':\n.*?(?=^[a-zA-Z_]+:|\Z)', s, re.M | re.S)
        if match and re.search(r'^  - platform: homeassistant$', match[0], re.M):
            raise ValueError(f'{source.name}: a {section} subscribes to Home Assistant; runtime tiles bring their own values')
    if '!secret' in s: raise ValueError('Remote package still depends on local secrets')
    return '# GENERATED by tools/generate_packages.py; edit the source board profile.\n' + s

def main():
    parser = argparse.ArgumentParser(description=__doc__)
    parser.add_argument('--check', action='store_true')
    args = parser.parse_args()
    for board in REFS:
        source = ROOT / ('home-like-2432s028.yaml' if board == 'cyd' else 'guition-4848s040.yaml')
        if not source.exists(): continue
        path = ROOT / 'packages' / f'{board}.yaml'
        expected = generate(board)
        if args.check:
            if not path.exists() or path.read_text() != expected: raise SystemExit(f'Outdated: {path}')
        else:
            path.parent.mkdir(exist_ok=True)
            path.write_text(expected)
        print(f'{board}: package ' + ('verified' if args.check else 'generated'))

if __name__ == '__main__': main()