package router

import (
	"strconv"

	"github.com/gofiber/fiber/v2"
	"github.com/johannesbuehl/golunteer/backend/pkg/db/events"
)

func (a *Handler) postEvent() {
	// check admin
	if !a.Admin {
		a.Status = fiber.StatusForbidden
	} else {

		// write the event
		var body events.EventCreate

		// try to parse the body
		if err := a.C.BodyParser(&body); err != nil {
			a.Status = fiber.StatusBadRequest

			logger.Log().Msgf("can't parse body: %v", err)

			// validate the parsed body
		} else if err := validate.Struct(body); err != nil {
			a.Status = fiber.StatusBadRequest

			logger.Log().Msgf("invalid body: %v", err)

			// create the event
		} else if err := events.Create(body); err != nil {
			a.Status = fiber.StatusInternalServerError

			logger.Error().Msgf("can't create event: %v", err)
		}
	}
}

func (a *Handler) patchEvent() {
	// check admin
	if !a.Admin {
		a.Status = fiber.StatusForbidden
	} else {
		// parse the body
		var body events.EventPatch

		if err := a.C.BodyParser(&body); err != nil {
			a.Status = fiber.StatusBadRequest

			logger.Log().Msgf("can't parse body: %v", err)

			// validate the body
		} else if err := validate.Struct(body); err != nil {
			a.Status = fiber.StatusBadRequest

			logger.Log().Msgf("ivnalid body: %v", err)

			// update the event
		} else if err := events.Update(body); err != nil {
			a.Status = fiber.StatusInternalServerError

			logger.Error().Msgf("updating the event failed: %v", err)
		}
	}
}

func (a *Handler) getEventsAssignments() {
	if events, err := events.WithAssignments(); err != nil {
		a.Status = fiber.StatusInternalServerError

		logger.Error().Msgf("can't retrieve events with assignments: %v", err)
	} else {
		a.Data = events
	}
}

func (a *Handler) getEventsAvailabilities() {
	// check for admin
	if !a.Admin {
		a.Status = fiber.StatusForbidden
	} else {
		if events, err := events.WithAvailabilities(); err != nil {
			a.Status = fiber.StatusInternalServerError

			logger.Error().Msgf("can't retrieve events with availabilities: %v", err)
		} else {
			a.Data = events
		}
	}
}

func (a *Handler) getEventsUserPending() {
	if events, err := events.UserPending(a.UserName); err != nil {
		a.Status = fiber.StatusInternalServerError

		logger.Warn().Msgf("can't query database for users %q pending events: %v", a.UserName, err)
	} else {
		a.Data = events
	}
}

func (a *Handler) getEventsUserPendingCount() {
	if count, err := events.UserPendingCount(a.UserName); err != nil {
		a.Status = fiber.StatusInternalServerError

		logger.Warn().Msgf("can't query database for users %q pending events: %v", a.UserName, err)
	} else {
		a.Data = count
	}
}

func (a *Handler) getEventsUserAssigned() {
	// retrieve the events from the database
	if events, err := events.User(a.UserName); err != nil {
		a.Status = fiber.StatusBadRequest

		logger.Log().Msgf("retrieval of user-assigned-events failed: %v", err)
	} else {
		a.Data = events
	}
}

func (a *Handler) putEventUserAvailability() {
	// parse the query
	if eventID := a.C.QueryInt("eventID", -1); eventID == -1 {
		a.Status = fiber.StatusBadRequest

		logger.Log().Msg("setting user-event-availability failed: query is missing \"eventID\"")
	} else {
		// parse the body
		body := a.C.Body()

		if availabilityID, err := strconv.Atoi(string(body)); err != nil {
			a.Status = fiber.StatusBadRequest

			logger.Log().Msgf("setting user-event-availability failed: can't get parse: %v", err)

			// insert the availability into the database
		} else if err := events.UserAvailability(a.UserName, eventID, availabilityID); err != nil {
			a.Status = fiber.StatusInternalServerError

			logger.Error().Msgf("setting user-event-availability failed: can't write availability to database: %v", err)
		}
	}

	// parse the body
}

func (a *Handler) deleteEvent() {
	// check for admin
	if !a.Admin {

		logger.Warn().Msg("event-delete failed: user is no admin")

		a.Status = fiber.StatusForbidden
		// -1 can't be valid
	} else if eventId := a.C.QueryInt("eventID", -1); eventId == -1 {
		logger.Log().Msgf("event-delete failed: \"eventID\" is missing in query")

		a.Status = fiber.StatusBadRequest
	} else if err := events.Delete(eventId); err != nil {

		logger.Error().Msgf("event-delete failed: can't delete from database: %v", err)

		a.Status = fiber.StatusInternalServerError
	} else {
		logger.Log().Msgf("deleted event with eventID %d", eventId)
	}
}