from __future__ import annotations

import json
from pathlib import Path
from typing import Any

from jsonschema import Draft202012Validator

BASE_DIR = Path(__file__).resolve().parent
SCHEMA_DIR = BASE_DIR / "schemas"


def load_schema(name: str) -> dict[str, Any]:
    path = SCHEMA_DIR / name
    with path.open("r", encoding="utf-8") as handle:
        return json.load(handle)


REPORT_SCHEMA = load_schema("report-payload.schema.json")
CLAUDE_SCHEMA = load_schema("claude-output.schema.json")
REPORT_VALIDATOR = Draft202012Validator(REPORT_SCHEMA)
CLAUDE_VALIDATOR = Draft202012Validator(CLAUDE_SCHEMA)


def _format_path(path_parts) -> str:
    path = "$"
    for part in path_parts:
        if isinstance(part, int):
            path += f"[{part}]"
        else:
            path += f".{part}"
    return path


def collect_errors(payload: Any, validator: Draft202012Validator) -> list[dict[str, str]]:
    errors = []
    for error in sorted(validator.iter_errors(payload), key=lambda item: list(item.path)):
        errors.append({
            "path": _format_path(error.absolute_path),
            "message": error.message,
        })
    return errors


def validate_report(payload: Any) -> list[dict[str, str]]:
    return collect_errors(payload, REPORT_VALIDATOR)


def validate_claude_output(payload: Any) -> list[dict[str, str]]:
    return collect_errors(payload, CLAUDE_VALIDATOR)