#!/usr/bin/env python3
"""Generate a compact runtime index for the generated Python API dispatcher."""
from __future__ import annotations

import hashlib
import json
from pathlib import Path

ROOT = Path(__file__).resolve().parents[1]
manifest_path = ROOT / "docs/p6/python-api-manifest.json"
out = ROOT / "web/public/api/python-api-index.json"
diagnostic_out = ROOT / "docs/p6/python-api-index.json"
manifest = json.loads(manifest_path.read_text(encoding="utf-8"))
rows = manifest["records"]
fields = {
    "modules": sorted({row["module"] for row in rows}),
    "kinds": sorted({row["kind"] for row in rows}),
    "families": sorted({row["family"] for row in rows}),
    "tiers": sorted({row["tier"] for row in rows}),
    "dispositions": sorted({row["disposition"] for row in rows}),
}
lookup = {key: {value: index for index, value in enumerate(values)} for key, values in fields.items()}
records = []
for row in rows:
    records.append([
        row["id"],
        lookup["modules"][row["module"]],
        lookup["kinds"][row["kind"]],
        row["name"],
        lookup["families"][row["family"]],
        lookup["tiers"][row["tier"]],
        lookup["dispositions"][row["disposition"]],
        row.get("evidence", {}).get("path"),
        row.get("evidence", {}).get("line"),
    ])
index = {
    "schema": "freecad-web-python-api-runtime-index/v1",
    "source": {"manifest": "docs/p6/python-api-manifest.json", "manifestSha256": hashlib.sha256(manifest_path.read_bytes()).hexdigest()},
    "fields": fields,
    "records": records,
}
out.parent.mkdir(parents=True, exist_ok=True)
serialized = json.dumps(index, ensure_ascii=False, separators=(",", ":")) + "\n"
out.write_text(serialized, encoding="utf-8")
diagnostic_out.parent.mkdir(parents=True, exist_ok=True)
diagnostic_out.write_text(serialized, encoding="utf-8")
print(json.dumps({"output": str(out.relative_to(ROOT)), "diagnosticOutput": str(diagnostic_out.relative_to(ROOT)), "records": len(records), "bytes": out.stat().st_size, "sha256": hashlib.sha256(out.read_bytes()).hexdigest()}, ensure_ascii=False))