using System;
using System.ComponentModel;
using System.Diagnostics;
using System.Data.SQLite;
using System.Runtime.InteropServices;
using static System.Net.Mime.MediaTypeNames;

namespace Simpsons_generator;

class Program
{
    /*    public static void openit(string x) {
            System.Diagnostics.Process.Start("cmd", "/C start" + " " + x); 
        }*/

    public static readonly string folder_path = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), "Simpsons_generator");
    public static readonly string filePath = Path.Combine(folder_path, "episodes-watched.csv");
    public static readonly string overrideBrowser = Path.Combine(folder_path, "overrideBrowser.xml");

    static SQLiteConnection CreateConnection()
    {

        SQLiteConnection sqliteconn;
        // Create a new database connection:
        var sqllitedatasource = $"Data Source={folder_path}/database.db;Version=3;New=True;Compress=True;";
        sqliteconn = new SQLiteConnection(sqllitedatasource);
        // Open the connection:
        try
        {
            sqliteconn.Open();
        }
        catch (Exception ex)
        {

        }
        return sqliteconn;
    }

    private static void Openit(string url)
    {
        try
        {
            Process.Start(url);
        }
        catch
        {
            // hack because of this: https://github.com/dotnet/corefx/issues/10361
            if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
            {
                url = url.Replace("&", "^&");
                if (File.Exists(overrideBrowser))
                {
                    string browser_path = File.ReadAllText(overrideBrowser);
                    Console.WriteLine("browser:   "+browser_path);
                    Process.Start(new ProcessStartInfo(browser_path, url) { CreateNoWindow = true });
                }
                else {
                    Process.Start(new ProcessStartInfo(url) { UseShellExecute = true });
                }
                    
            }
            else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
            {
                Process.Start("xdg-open", url);
            }
            else if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
            {
                Process.Start("open", url);
            }
            else
            {
                throw;
            }
        }

        //Process.Start(new ProcessStartInfo("C:\\Program Files\\Google\\Chrome\\Application\\chrome.exe", url_generated) { CreateNoWindow = true });



    }


    private static bool CheckEpisodeAlreadyRun(string url) 
    {
        if (File.Exists(filePath))
        {
            

            var linesRead = File.ReadLines(filePath);

            // iterate through each element within the array and
            // print it out
            //
            foreach (var lineRead in linesRead)
            {
                if (lineRead == url)
                {
                    Console.WriteLine("already watched");
                    return true;
                }
            }

        }
        return false;

    }

    static object RunSQLQuery(SQLiteConnection conn, string query)
    {
        SQLiteDataReader sqlite_datareader;
        SQLiteCommand sqlite_cmd;
        sqlite_cmd = conn.CreateCommand();
        sqlite_cmd.CommandText = query;
        sqlite_datareader = sqlite_cmd.ExecuteReader();
        if (sqlite_datareader.Read())
        {
            return sqlite_datareader["result"];
        }
        else
        {
            return false;
        }
            
    }

    
    private static void SaveIntoDatabase(SQLiteConnection conn,int season, int episode)
    {
        SQLiteCommand sqliteCmd;
        sqliteCmd = conn.CreateCommand();
        string updateQuery = $"update episodes set seen=1 WHERE season = {season} and episode = {episode}";
        sqliteCmd.CommandText = updateQuery;
        sqliteCmd.ExecuteNonQuery();
    }


    static void Main(string[] args)
    {

        string urlGenerated;
        int randomSeason;
        int randomEpisode; 

        SQLiteConnection sqliteconn;
        sqliteconn = CreateConnection();
        bool restart = false;
        do
        {
            restart = false;
            
            //get maximum number of seasons
            string maximumNumberOfSeasonsQuery = "SELECT COUNT(DISTINCT season) as result FROM episodes;";
            int maximumNumberSeasons = Convert.ToInt32(RunSQLQuery(sqliteconn, maximumNumberOfSeasonsQuery));

            
            //random for the season
            Random rnd = new Random();
            randomSeason  = rnd.Next(1, maximumNumberSeasons);

            Console.WriteLine("random season: "+randomSeason);

            //get maximum number of episodes for this season
            string maximumNumberOfEpisodesQuery = $"SELECT COUNT() as result FROM episodes WHERE season = {randomSeason};";
            int maximumNumberOfEpisodes = Convert.ToInt32(RunSQLQuery(sqliteconn, maximumNumberOfEpisodesQuery));
            
            randomEpisode = rnd.Next(1, maximumNumberOfEpisodes);
            Console.WriteLine("random episode: "+randomEpisode);
            
            //url generated
            string urlGeneratedQuery = $"SELECT url as result FROM episodes WHERE season = {randomSeason} and episode = {randomEpisode};";
            urlGenerated = Convert.ToString(RunSQLQuery(sqliteconn, urlGeneratedQuery));
            
            
            //CheckEpisodeAlreadyRun
            string checkEpisodeAlreadyRunQuery = $"SELECT seen as result FROM episodes WHERE season = {randomSeason} and episode = {randomEpisode};";
            bool checkEpisodeAlreadyRun = Convert.ToBoolean(RunSQLQuery(sqliteconn, checkEpisodeAlreadyRunQuery));

            if (checkEpisodeAlreadyRun)
            {
                //return;
                restart = true;
                Console.WriteLine("already watched");
                
            }



        } while (restart);
        Console.WriteLine("urlGenerated "+urlGenerated);
        Openit(urlGenerated);
        
        SaveIntoDatabase(sqliteconn,randomSeason,randomEpisode);

    }
}