#!/usr/bin/env python3
"""Validate SageAPI model JSON definitions."""
import json
import os
import sys

def validate_models(models_dir='models'):
    errors = 0
    for f in sorted(os.listdir(models_dir)):
        if not f.endswith('.json'):
            continue
        filepath = os.path.join(models_dir, f)
        with open(filepath) as fh:
            data = json.load(fh)

        for key in ['summary', 'fields', 'idxfields']:
            if key not in data:
                print(f'ERROR: {f} missing "{key}"')
                errors += 1

        if not data.get('summary') or not isinstance(data['summary'], list):
            print(f'ERROR: {f} summary must be a non-empty list')
            errors += 1
            continue

        summary = data['summary'][0]
        if 'primary' not in summary:
            print(f'ERROR: {f} summary must have "primary" field')
            errors += 1

        table_name = summary.get('name', '?')
        primary = summary.get('primary', '?')
        print(f'  OK: {f} ({table_name}, primary={primary})')

    if errors:
        print(f'\n{errors} error(s) found')
        sys.exit(1)
    print('All model definitions valid')

if __name__ == '__main__':
    validate_models()