"""Explicit reproducibility exercise with authored synthetic input; no targets needed."""
from __future__ import annotations
import argparse,concurrent.futures,contextlib,copy,json,multiprocessing,tempfile
from pathlib import Path
from generator import production,vocabulary
from tests.solo_fixtures import song

def main():
  p=argparse.ArgumentParser(description=__doc__);p.add_argument('--output',type=Path,required=True);a=p.parse_args();a.output.mkdir(parents=True,exist_ok=True)
  data=Path('data').resolve();source=production.SourceAnalysis.read(song(count=1,chords=('C7',)))
  results={};evidence={'scope':'One-bar independently authored source, real production catalogs, all six roles; not a whole-song musical quality test.','canonical_source':source.musical_key,'cases':{}}
  def collect(label,values):
    hashes={role:vocabulary.fingerprint(value['document']) for role,value in values.items()}
    evidence['cases'][label]=hashes
    evidence.setdefault('reads',{})[label]={r:v.get('observed_reads',[]) for r,v in values.items()}
    if results:assert hashes==results['base'],label
    else:results['base']=hashes
  with tempfile.TemporaryDirectory() as temp:
    cache=Path(temp)/'cache'
    collect('alone_cold',{r:production.generate_role(source,r,data,cache_dir=cache) for r in production.ROLES})
    collect('reverse_warm',{r:production.generate_role(source,r,data,cache_dir=cache) for r in reversed(production.ROLES)})
    with concurrent.futures.ProcessPoolExecutor(max_workers=2,mp_context=multiprocessing.get_context('spawn')) as pool:
      futures={r:pool.submit(production._job,(source,r,data,{},None)) for r in reversed(production.ROLES)}
      collect('parallel_cold',{r:f.result() for r,f in futures.items()})
    with contextlib.chdir(temp):
      refs=Path('build');refs.mkdir()
      for name in ('all-of-me','autumn-leaves'):
        for i in (1,2):(refs/f'{name}-solo-{i}.xml').write_text('invalid optional content')
      collect('targets_present_cold',{r:production.generate_role(source,r,data) for r in production.ROLES})
      for path in refs.glob('*.xml'):path.unlink()
      collect('targets_absent_cold',{r:production.generate_role(source,r,data) for r in production.ROLES})
    # Exercise an operational musical setting, not merely a different cache
    # key. A stream seed alone need not change a deterministic winner.
    changed=production.generate_role(source,'electric_solo',data,{'register_center':72})
    changed_hash=vocabulary.fingerprint(changed['document'])
    assert changed_hash!=results['base']['electric_solo'],'electric setting was inert'
    evidence['changed_electric_register_hash']=changed_hash
    collect('after_electric_setting',{r:production.generate_role(source,r,data,cache_dir=cache) for r in production.ROLES})
  evidence['passed']=True
  (a.output/'dependency.json').write_text(json.dumps(evidence,indent=2))
  print(json.dumps({'passed':True,'hashes':results['base']},indent=2))
if __name__=='__main__':main()