"""Pilot request lead-gen endpoint.

POST /api/v1/pilot/request — принимает заявку на пилот (лид с лендинга или страницы анализа),
сохраняет в таблицу pilot_requests.
Telegram-уведомление — TODO (creds не настроены, см. #307 SF-B3).
"""

from __future__ import annotations

import logging
from typing import Annotated, Any, Literal

from fastapi import APIRouter, Depends, Request
from pydantic import BaseModel, Field
from sqlalchemy import text
from sqlalchemy.orm import Session

from app.core.db import get_db

logger = logging.getLogger(__name__)

router = APIRouter()


class PilotRequestInput(BaseModel):
    name: str = Field(min_length=2, max_length=200)
    phone: str | None = Field(default=None, max_length=50)
    # Note: was EmailStr but `email-validator` package not in deps → ImportError
    # on backend startup → container unhealthy → whole deploy fails. Using plain
    # str + minimal regex; full validation can happen on frontend/CRM side.
    email: str | None = Field(default=None, max_length=200, pattern=r"^[^@\s]+@[^@\s]+\.[^@\s]+$")
    company: str | None = Field(default=None, max_length=200)
    message: str | None = Field(default=None, max_length=2000)
    source: Literal["landing", "analyze_page", "other"] = "landing"


@router.post("/request")
async def create_pilot_request(
    payload: PilotRequestInput,
    request: Request,
    db: Annotated[Session, Depends(get_db)],
) -> dict[str, Any]:
    """Сохраняет заявку на пилот в pilot_requests."""
    user_agent = request.headers.get("user-agent")

    row = (
        db.execute(
            text(
                """
            INSERT INTO pilot_requests (name, phone, email, company, message, source, user_agent)
            VALUES (:name, :phone, :email, :company, :message, :source, :user_agent)
            RETURNING CAST(id AS text), created_at
            """
            ),
            {
                "name": payload.name,
                "phone": payload.phone,
                "email": str(payload.email) if payload.email else None,
                "company": payload.company,
                "message": payload.message,
                "source": payload.source,
                "user_agent": user_agent,
            },
        )
        .mappings()
        .one()
    )

    db.commit()

    logger.info("pilot_request saved id=%s source=%s", row["id"], payload.source)

    return {
        "id": row["id"],
        "created_at": row["created_at"].isoformat(),
        "status": "received",
    }