#!/usr/bin/env python3
"""Validate a vault path and resolve its registered Obsidian vault ID."""

from __future__ import annotations

import json
import sys
from pathlib import Path

OBSIDIAN_CONFIG = Path.home() / ".config" / "obsidian" / "obsidian.json"


def fail(message: str) -> int:
    json.dump({"ok": False, "error": message}, sys.stdout)
    return 1


def main() -> int:
    if len(sys.argv) != 2:
        return fail("No vault directory is configured")
    raw_path = sys.argv[1].strip()
    if not raw_path:
        return fail("No vault directory is configured")
    vault = Path(raw_path).expanduser().resolve()
    if not vault.is_dir():
        return fail(f"Vault directory was not found: {vault}")

    vault_id: str | None = None
    config_error: str | None = None
    try:
        config = json.loads(OBSIDIAN_CONFIG.read_text(encoding="utf-8"))
        for registered_id, metadata in config.get("vaults", {}).items():
            registered_path = Path(str(metadata.get("path", ""))).expanduser().resolve()
            if registered_path == vault:
                vault_id = str(registered_id)
                break
    except FileNotFoundError:
        config_error = "Obsidian has not registered any vaults yet"
    except (OSError, json.JSONDecodeError, TypeError) as error:
        config_error = f"Cannot read Obsidian vault registration: {error}"

    response = {
        "ok": True,
        "path": str(vault),
        "name": vault.name,
        "vaultId": vault_id,
        "obsidianError": config_error
        or (
            None
            if vault_id
            else "This directory is not registered as an Obsidian vault"
        ),
    }
    json.dump(response, sys.stdout)
    return 0


if __name__ == "__main__":
    raise SystemExit(main())