"""Split reader forms into ordered semantic/decomposition passes; merge complete labels."""
from pathlib import Path
import argparse,csv
ROOT=Path(__file__).resolve().parents[1]
def read(p):
    with p.open(newline='') as f:return list(csv.DictReader(f))
def write(p,rows,fields):
    p.parent.mkdir(parents=True,exist_ok=True)
    with p.open('w',newline='') as f:
        w=csv.DictWriter(f,fieldnames=fields,extrasaction='ignore');w.writeheader();w.writerows(rows)
def main():
    ap=argparse.ArgumentParser();ap.add_argument('--merge',choices=['A','B']);a=ap.parse_args()
    home=ROOT/'review/human';dest=home/'passes'
    for reader in ['A','B']:
        original=home/f'parser_annotator_{reader}.csv';rows=read(original)
        p1=dest/f'{reader}_pass1_semantics.csv';p2=dest/f'{reader}_pass2_decomposition.csv'
        if not a.merge:
            if p1.exists() or p2.exists():raise FileExistsError('Pass files already exist; preserve annotations.')
            write(p1,rows,['id','query','representable','ambiguity','note'])
            write(p2,rows,['id','query','proposed_target','proposed_anchor','proposed_relation','proposed_plural','decomposition_correct','error_type','note'])
        elif a.merge==reader:
            aa={r['id']:r for r in read(p1)};bb={r['id']:r for r in read(p2)}
            assert aa.keys()==bb.keys()=={r['id'] for r in rows}
            for r in rows:
                x,y=aa[r['id']],bb[r['id']]
                for k in ['representable','ambiguity']:
                    assert x[k] in ['0','1'],f'{r["id"]}: unresolved {k}';r[k]=x[k]
                assert y['decomposition_correct'] in ['0','1'];r['decomposition_correct']=y['decomposition_correct']
                r['error_type']=y['error_type'];r['note']='SEMANTICS: '+x['note']+'; DECOMPOSITION: '+y['note']
            # Keep the supplied and independent source forms intact.
            write(home/f'parser_annotator_{reader}_completed.csv',rows,list(rows[0]))
    print('Prepared passes' if not a.merge else f'Merged completed reader {a.merge}')
if __name__=='__main__':main()