package main

import (
	"errors"
	"net/http"

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

type media struct {
	ID     string `json: "id"`
	Url    string `json: "url"`
	Title  string `json: "title"`
	Author string `json: "author"`
}

var songs = []media{
	{ID: "1", Url: "https://www.youtube.com/watch?v=DmeUuoxyt_E", Title: "Rockstars", Author: "Nickelback"},
	{ID: "2", Url: "https://www.youtube.com/watch?v=u9Dg-g7t2l4", Title: "The Sound Of Silence", Author: "Disturbed"},
	{ID: "3", Url: "https://www.youtube.com/watch?v=uxUATkpMQ8A", Title: "Gives You Hell", Author: "The All-American Rejects"},
}

func getMedia(c *gin.Context) {
	c.IndentedJSON(http.StatusOK, songs)
}

func songByid(c *gin.Context) {
	id := c.Param("id")
	song, err := getMediaByid(id)

	if err != nil {
		c.IndentedJSON(http.StatusNotFound, gin.H{"message": "Book not found."})
		return
	}

	c.IndentedJSON(http.StatusOK, song)
}

func getMediaByid(id string) (*media, error) {
	for i, song := range songs {
		if song.ID == id {
			return &songs[i], nil
		}
	}
	return nil, errors.New("id not found")
}

func addMedia(c *gin.Context) {
	var newSong media

	if err := c.BindJSON(&newSong); err != nil {
		return
	}

	songs = append(songs, newSong)
	c.IndentedJSON(http.StatusCreated, newSong)
}

func main() {
	router := gin.Default()
	router.GET("/songs", getMedia)
	router.GET("/songs/:id", songByid)
	router.POST("/songs", addMedia)
	router.Run("127.0.0.1:8000")
}