## Copyright © 2026 Olaf Kolkman
## SPDX-License-Identifier: GPL-3.0-or-later

from uuid import uuid4

from fastapi import APIRouter, HTTPException
from pydantic import BaseModel

from backend.app.core.config import settings
from backend.app.database import get_connection, hash_password
from backend.app.services.email_service import save_smtp_settings, send_test_email

router = APIRouter()


class SetupRequest(BaseModel):
    username: str
    email: str
    password: str
    smtp_host: str
    smtp_port: int = 587
    smtp_username: str = ''
    smtp_password: str = ''
    smtp_from: str
    smtp_use_tls: bool = True


def has_administrator() -> bool:
    with get_connection() as conn:
        return conn.execute('SELECT 1 FROM users WHERE is_admin = 1 LIMIT 1').fetchone() is not None


@router.post('', status_code=201)
def configure_application(payload: SetupRequest):
    if has_administrator():
        raise HTTPException(status_code=409, detail='LinkLog is already configured')
    username = payload.username.strip()
    email = payload.email.strip()
    smtp_host = payload.smtp_host.strip()
    smtp_from = payload.smtp_from.strip()
    if not username or not email or not smtp_host or not smtp_from or len(payload.password) < 8:
        raise HTTPException(status_code=422, detail='Admin credentials and SMTP settings are required')
    if not 1 <= payload.smtp_port <= 65535:
        raise HTTPException(status_code=422, detail='SMTP port must be between 1 and 65535')

    user_id = str(uuid4())
    smtp_values = {
        'smtp_host': smtp_host,
        'smtp_port': payload.smtp_port,
        'smtp_username': payload.smtp_username.strip(),
        'smtp_password': payload.smtp_password,
        'smtp_from': smtp_from,
        'smtp_use_tls': payload.smtp_use_tls,
    }
    with get_connection() as conn:
        try:
            conn.execute(
                '''INSERT INTO users
                   (id, username, email, password_hash, is_admin, email_verified)
                   VALUES (?, ?, ?, ?, 1, 1)''',
                (user_id, username, email, hash_password(payload.password)),
            )
        except Exception as error:
            raise HTTPException(status_code=409, detail='Username or email already exists') from error
        conn.commit()
    save_smtp_settings(smtp_values)
    try:
        send_test_email(email)
    except Exception as error:
        with get_connection() as conn:
            conn.execute('DELETE FROM users WHERE id = ?', (user_id,))
            conn.execute('DELETE FROM app_settings WHERE name = ?', ('smtp',))
            conn.commit()
        raise HTTPException(status_code=503, detail=f'SMTP test mail could not be sent: {error}') from error
    return {'status': 'configured', 'message': 'LinkLog is configured and the SMTP test mail was sent.'}


@router.get('/status')
def setup_status():
    return {'configured': has_administrator()}