/*
 * This file is part of laurelin_api
 * Copyright (C) 2023 Jonni Liljamo <jonni@liljamo.com>
 *
 * Licensed under GPL-3.0-only.
 * See LICENSE for licensing information.
 */

package handlers

import (
	"api/apierror"
	"api/db"
	"api/models"
	"net/http"

	"github.com/gin-gonic/gin"
)

func JoinGame(c *gin.Context) {
	id := c.Param("id")

	// fetch the game
	var game models.Game
	record := db.DbConn.Where("id = ?", id).First(&game)
	if record.Error != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": apierror.GameNotFound})
		c.Abort()
		return
	}

	// check if guest is already filled
	if game.GuestID != "" {
		c.JSON(http.StatusBadRequest, gin.H{"error": apierror.GameFull})
		c.Abort()
		return
	}

	// check if the game is forming
	if game.State != models.GAMESTATE_FORMING {
		c.JSON(http.StatusBadRequest, gin.H{"error": apierror.GameNotForming})
		c.Abort()
		return
	}

	// get guest (us)
	newGuest, newGuestErr := db.GetUserByEmail(c.GetString("email"))
	if newGuestErr != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": apierror.Placeholder})
		c.Abort()
		return
	}

	// are we the host?
	if game.HostID == newGuest.ID {
		c.JSON(http.StatusBadRequest, gin.H{"error": apierror.CannotJoinOwnGame})
		c.Abort()
		return
	}

	// if we are not the host, set us as the guest, and "start" the game
	updatedGame := db.DbConn.Model(&game).Updates(models.Game{GuestID: newGuest.ID, State: models.GAMESTATE_INPROGRESS})
	if updatedGame.Error != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": apierror.Placeholder})
		c.Abort()
		return
	}

	c.JSON(http.StatusOK, gin.H{})
}