"""Explicit single-role build. Does not publish or consume an existing ensemble."""
import argparse
import json
import time
from pathlib import Path
from generator import musicxml, parts, production

def main():
  parser=argparse.ArgumentParser(description=__doc__)
  parser.add_argument('--song',type=Path,required=True)
  parser.add_argument('--role',choices=production.ROLES,required=True)
  parser.add_argument('--data-dir',type=Path,default=Path('data'))
  parser.add_argument('--output',type=Path,required=True)
  parser.add_argument('--cache-dir',type=Path)
  parser.add_argument('--solo-xml',type=Path,help='Also export a completed solo role as MusicXML.')
  parser.add_argument('--settings',type=Path)
  args=parser.parse_args()
  if args.solo_xml and not args.role.endswith('_solo'):
    parser.error('--solo-xml requires a solo role')
  source=production.SourceAnalysis.read(parts.prepare_document(musicxml.load_musicxml(args.song)))
  start=time.monotonic()
  result=production.generate_role(source,args.role,args.data_dir,json.loads(args.settings.read_text()) if args.settings else {},args.cache_dir)
  args.output.parent.mkdir(parents=True,exist_ok=True)
  args.output.write_text(json.dumps(result,indent=2))
  if args.solo_xml:
    from generator.solo.export import write_role
    manifest=write_role(result,args.solo_xml)
    args.solo_xml.with_suffix('.manifest.solo').write_text(json.dumps(manifest,indent=2)+'\n')
  print(f'{args.role}: {time.monotonic()-start:.2f}s wall; cached={result["cache_hit"]}; role generation/cache lookup {result["seconds"]:.2f}s')

if __name__=='__main__':main()