"""SQL Whisperer routes."""
from flask import Blueprint, render_template, request, jsonify
from .whisperer import whisper

bp = Blueprint("sql_whisperer", __name__, template_folder="templates")

_DIALECTS = {"PostgreSQL", "MySQL", "SQLite", "SQL Server", "BigQuery"}


@bp.route("/")
def index():
    return render_template("sql_whisperer/index.html")


@bp.route("/api/whisper", methods=["POST"])
def api_whisper():
    body     = request.get_json(silent=True) or {}
    question = (body.get("question") or "").strip()
    schema   = (body.get("schema") or "").strip()
    dialect  = body.get("dialect", "PostgreSQL")

    if not question:
        return jsonify({"error": "question is required"}), 400
    if dialect not in _DIALECTS:
        dialect = "PostgreSQL"

    try:
        result = whisper(question, schema, dialect)
    except Exception as e:
        return jsonify({"error": "AI failed to convert query — please try again"}), 502
    if not result or not isinstance(result, dict):
        return jsonify({"error": "AI failed to convert query — please try again"}), 502
    return jsonify(result)