package api

import (
	"fmt"
	"machines/app/db"
	"net/http"
	"strconv"

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

const HOST = "0.0.0.0"
const PORT = 3000

func handlePing(c *gin.Context) {
	c.JSON(
		http.StatusOK,
		PingDto{
			Message: "Pong!",
		},
	)
}

func handleGetMachines(dbConn *gorm.DB) gin.HandlerFunc {
	return func(c *gin.Context) {
		machines := db.GetMachines(dbConn)

		c.JSON(
			http.StatusOK,
			GetMachinesResponse{
				Machines: *machines,
			},
		)
	}
}

func handleGetMachine(dbConn *gorm.DB) gin.HandlerFunc {
	return func(c *gin.Context) {
		machineId, err := strconv.Atoi(c.Param("machineId"))
		if err != nil {
			raiseBadRequestError(c, "Invalid machineId parameter")
			return
		}

		machine, err := db.GetMachine(dbConn, machineId)
		if err != nil {
			raiseNotFoundError(c, "Machine not found")
			return
		}

		c.JSON(
			http.StatusOK,
			machine,
		)
	}
}

func initRouter(dbConn *gorm.DB) *gin.Engine {
	gin.SetMode(gin.ReleaseMode)
	router := gin.Default()

	routes := router.Group("/machines")
	{
		routes.GET("/ping", handlePing)
		routes.GET("", handleGetMachines(dbConn))
		routes.GET("/:machineId", handleGetMachine(dbConn))
	}

	return router
}

func Serve(dbConn *gorm.DB) {
	serverAddr := fmt.Sprintf("%s:%d", HOST, PORT)

	router := initRouter(dbConn)
	router.Run(serverAddr)
}