package api

import (
	"fmt"
	"net/http"
	"products/app/db"
	"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 handleGetProducts(dbConn *gorm.DB) gin.HandlerFunc {
	return func(c *gin.Context) {
		products := db.GetProducts(dbConn)

		c.JSON(
			http.StatusOK,
			GetProductsResponse{
				Products: *products,
			},
		)
	}
}

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

		product, err := db.GetProduct(dbConn, productId)
		if err != nil {
			raiseNotFoundError(c, "Product not found")
			return
		}

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

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

	router.GET("/ping", handlePing)
	router.GET("/", handleGetProducts(dbConn))
	router.GET("/:productId", handleGetProduct(dbConn))

	return router
}

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

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