package main

import (
	"context"
	"encoding/json"
	"fmt"
	"net/http"
	"os"
)

func indexHandler(w http.ResponseWriter, r *http.Request) {
	setCorsAndNoCacheHeaders(&w, r)

	if r.URL.Path == "/version" {
		w.Header().Add("Content-Type", "application/json")

		testf()

		data := VersionData{Version: "2.1.3",
			Changelog: "Added a check to see if song exists before returning it, if not a new song will be picked up.",
			History: []VersionData{
				{
					Version:   "2.1.2",
					Changelog: "Added test server to swagger file.",
				},
				{
					Version:   "2.1.1",
					Changelog: "Fixed bug where wrong song was showed as currently played.",
				},
				{
					Version: "2.1.0",
					Changelog: "Added /addQue to add the last received song to the songQue. " +
						"Changed /rand and /rand/low to not add song to the que. " +
						"Changed /next to not call /rand when the end of the que is reached, instead the last song in the que will be resent.",
				},
				{
					Version:   "2.0.3",
					Changelog: "Another small change that should fix the caching problem.",
				},
				{
					Version:   "2.0.2",
					Changelog: "Hopefully fixed the caching problem with random.",
				},
				{
					Version:   "2.0.1",
					Changelog: "Fixed CORS",
				},
				{
					Version:   "2.0.0",
					Changelog: "Rebuilt the application in Go.",
				},
				{
					Version: "1.2.0",
					Changelog: "Made the /sync endpoint async. " +
						"Fixed bug where the game list wasn't reloaded when using /reset. " +
						"Fixed bug where the songNo showed in the list didn't match what should be sent.",
				},
				{
					Version: "1.1.0",
					Changelog: "Added sync endpoint, don't really trust it to 100%, would say beta. " +
						"Fixed bug with /next after /previous. Added /reset endpoint. " +
						"Added some info more to /info and /list.",
				},
				{
					Version:   "1.0.0",
					Changelog: "Added swagger documentation. Created version 1.0.",
				},
				{
					Version:   "0.5.5",
					Changelog: "Added increase played endpoint.",
				},
			},
		}
		_ = json.NewEncoder(w).Encode(data)

	} else if r.URL.Path == "/doc" {
		http.ServeFile(w, r, "./doc/swagger.yaml")

	} else if r.URL.Path == "/" {
		rows, dbErr := dbPool.Query(context.Background(), "select game_name from game")
		if dbErr != nil {
			_, _ = fmt.Fprintf(os.Stderr, "QueryRow failed: %v\n", dbErr)
			os.Exit(1)
		}
		for rows.Next() {
			var gameName string
			dbErr = rows.Scan(&gameName)
			if dbErr != nil {
				_, _ = fmt.Fprintf(os.Stderr, "QueryRow failed: %v\n", dbErr)
			}
			_, _ = fmt.Fprintf(w, "%v\n", gameName)
		}

		_, err := fmt.Fprint(w, "Hello, World!!")
		if err != nil {
			w.WriteHeader(http.StatusInternalServerError)
		}
	} else {
		http.NotFound(w, r)
		return
	}

}