from fastapi import APIRouter, Depends, HTTPException
from service_auth import UserId

from auth_config import Caller, auth
from db_module import get_db
from models import RepositoryUpdate, SubscribedRepository, SubscribedRepositoryList
from repositories import (
	validate_repository_combination_and_return_latest_tag,
)
from simple_logger_handler import setup_logger

logger = setup_logger(__name__)

user_router = APIRouter(dependencies=[Depends(auth.require(Caller.GATEWAY))])


@user_router.post("/repository/add")
def add_repository_subscription(
	user_id: UserId,
	repository: RepositoryUpdate,
	db=Depends(get_db),
):
	name = f"{repository.org}/{repository.repo}:{repository.tag}"
	logger.info(f"[FastAPI] Subscribe request: {repository.type.value} {name}, user_id={user_id}")

	with db.cursor() as cursor:
		cursor.execute(
			"SELECT id, active FROM watched_repositories "
			"WHERE type = %s AND org = %s AND repo = %s AND tag = %s",
			(repository.type.value, repository.org, repository.repo, repository.tag),
		)
		known = cursor.fetchone()

	latest_entry = None
	if known is None or not known[1]:
		latest_entry = validate_repository_combination_and_return_latest_tag(repository)

	try:
		with db.cursor() as cursor:
			cursor.execute(
				"INSERT INTO watched_repositories (type, org, repo, tag, latest_entry) "
				"VALUES (%s, %s, %s, %s, %s) "
				"ON DUPLICATE KEY UPDATE id = LAST_INSERT_ID(id), active = 1, missing_checks = 0, "
				"latest_entry = COALESCE(VALUES(latest_entry), latest_entry)",
				(repository.type.value, repository.org, repository.repo, repository.tag, latest_entry),
			)
			repository_id = cursor.lastrowid

			cursor.execute(
				"INSERT INTO watched_repositories_subscriptions (user_id, repository_id, custom_name) "
				"VALUES (%s, %s, %s) "
				"ON DUPLICATE KEY UPDATE active = 1, custom_name = VALUES(custom_name)",
				(user_id, repository_id, repository.custom_name),
			)
		db.commit()
	except Exception as e:
		db.rollback()
		logger.exception(f"[FastAPI] Failed to subscribe user_id={user_id} to {name}")
		raise HTTPException(status_code=500) from e

	logger.info(f"[FastAPI] user_id={user_id} subscribed to repository ID {repository_id} ({name})")
	return {"status": "ok", "detail": "Subscribed to repository", "name": name}

@user_router.post("/repository/delete")
def delete_repository_subscription(
	user_id: UserId,
	repository: RepositoryUpdate,
	db=Depends(get_db),
):
	name = f"{repository.org}/{repository.repo}:{repository.tag}"
	logger.info(f"[FastAPI] Unsubscribe request: {repository.type.value} {name}, user_id={user_id}")

	try:
		with db.cursor() as cursor:
			cursor.execute(
				"SELECT id FROM watched_repositories "
				"WHERE type = %s AND org = %s AND repo = %s AND tag = %s FOR UPDATE",
				(repository.type.value, repository.org, repository.repo, repository.tag),
			)
			known = cursor.fetchone()

			if known is None:
				db.rollback()
				logger.info(f"[FastAPI] Repository {repository.type.value} {name} is not tracked, nothing to do")
				return {"status":"ok","detail":"Unsubscribed from repository","name":name}

			repository_id = known[0]
			cursor.execute(
				"UPDATE watched_repositories_subscriptions SET active = 0 "
				"WHERE user_id = %s AND repository_id = %s",
				(user_id, repository_id),
			)

			cursor.execute(
				"SELECT 1 from watched_repositories_subscriptions "
				"WHERE repository_id = %s AND active = 1 LIMIT 1 FOR SHARE",
				(repository_id,),
			)
			if cursor.fetchone() is None:
				cursor.execute(
					"UPDATE watched_repositories SET active = 0 WHERE id = %s",
					(repository_id,),
				)
			db.commit()
	except Exception as e:
		db.rollback()
		logger.exception(f"[FastAPI] Failed to unsubscribe user_id={user_id} to {name}")
		raise HTTPException(status_code=500) from e

	logger.info(f"[FastAPI] Unsubscribe request successful: {repository.type.value} {name}, user_id={user_id}")
	return {"status":"ok","detail":"Unsubscribed from repository","name":name}

@user_router.get("/repository/list")
def list_subscribed_repositories(
	user_id: UserId,
	db = Depends(get_db),
):
	logger.info(f"[FastAPI] Received request to list repositories for user_id={user_id}")
	try:
		with db.cursor() as cursor:
			cursor.execute(
				"select w.type, w.org, w.repo, w.tag, w.latest_entry, s.custom_name, s.active from watched_repositories "
				"AS w JOIN watched_repositories_subscriptions AS s ON w.id = s.repository_id "
				"WHERE s.user_id = %s ORDER BY w.type",
				(user_id,),
			)
			rows = cursor.fetchall()

		repository_list = SubscribedRepositoryList()
		for type, org, repo, tag, latest_entry, custom_name, is_active in rows:
			entry = SubscribedRepository(
				type = type,
				repository_name = custom_name or f"{org}/{repo}",
				tag = tag,
				latest_entry = latest_entry,
			)
			(repository_list.active if is_active else repository_list.inactive).append(entry)

	except Exception as e:
		logger.exception("[FastAPI] Failed to list repository")
		raise HTTPException(status_code=500) from e

	logger.info(f"[FastAPI] Listed all repositories for user_id={user_id}")
	return repository_list