/*
 * This file is part of sdbapi
 * Copyright (C) 2022 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 p2 is already filled
	if game.P2 != "" {
		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 p1 (game creator)
	p1, p1err := db.GetUserByID(game.P1)
	if p1err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": apierror.Placeholder})
		c.Abort()
		return
	}

	// get p2 (us)
	p2, p2err := db.GetUserByEmail(c.GetString("email"))
	if p2err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": apierror.Placeholder})
		c.Abort()
		return
	}

	// are we p1?
	if p1.ID == p2.ID {
		c.JSON(http.StatusBadRequest, gin.H{"error": apierror.CannotJoinOwnGame})
		c.Abort()
		return
	}

	// if we are not p1, set us as p2
	updatedGame := db.DbConn.Model(&game).Update("p2", p2.ID)
	if updatedGame.Error != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": apierror.Placeholder})
		c.Abort()
		return
	}

	// return a 20x code
	c.JSON(http.StatusNoContent, nil)
}