"""Read-only: compare source corners with the viewer's actual bend geometry."""
import argparse
import json
from pathlib import Path
import subprocess
import sys

root=Path(__file__).resolve().parents[1]
sys.path.insert(0,str(root/'src/backend'if (root/'src/backend').is_dir()else root))
from repair_source_cycle_connections import path_key


def inspect(path,node):
    import server
    server.require_modeling_rules()
    data=json.loads(path.read_text());group=data['group']
    kernel=root/'model_kernel.js'
    if not kernel.is_file():kernel=root/'src/frontend/src/model_kernel.js'
    script="const fs=require('fs');require(process.argv[1]);const g=JSON.parse(fs.readFileSync(0,'utf8'));process.stdout.write(JSON.stringify(g.instance_paths_m.map((p,i)=>ModelKernel.bendPath(p,g,i))));"
    process=subprocess.run([node,'-e',script,str(kernel)],input=json.dumps(group),
        capture_output=True,text=True,check=True)
    bends=json.loads(process.stdout);previous={path_key(p)for p in data['previous_paths']}
    rows=[]
    for i,(raw,bend)in enumerate(zip(group['instance_paths_m'],bends)):
        if path_key(raw)in previous:continue
        before,first_raw=server.tube_path_outside_component_union(
            [raw],group['diameter_mm'],data['concrete_components'])
        after,first_bent=server.tube_path_outside_component_union(
            [bend['path']],group['diameter_mm'],data['concrete_components'])
        rows.append({'index':i,'source_length_m':bend['sourceLengthM'],
            'rounded_length_m':bend['lengthM'],'warnings':bend['warnings'],
            'source_corner_outside_samples':before,'rounded_outside_samples':after,
            'first_source_outside':first_raw,'first_rounded_outside':first_bent})
    return {'id':group['id'],'rows':rows,'published':False}


if __name__=='__main__':
    parser=argparse.ArgumentParser(description=__doc__)
    parser.add_argument('candidate',type=Path);parser.add_argument('--node',default='node')
    args=parser.parse_args();print(json.dumps(inspect(args.candidate,args.node),ensure_ascii=False,indent=2))