using System.Collections;
using Newtonsoft.Json;
using Pastel;
using RSND.Core.DbInternals;
using RSND.Core.Querying.Queries;

namespace RSND.Core;

public class Database
{
    private string Name { get; set; }
    
    private List<Table> _tables = new();

    public Database(string name)
    {
        Name = name;
    }

    public void SetupFiles()
    {
        if (File.Exists($"{Name}.json"))
        {
            Console.WriteLine($"[{Name}] The file exists.");
            var json = File.ReadAllText($"{Name}.json");
            var db = JsonConvert.DeserializeObject<List<Table>>(json);
            
            // if this is null, then something is wrong with the file
            if (db != null)
                _tables = db;
        }
        else
        {
            Console.WriteLine($"[{Name}] The file is getting created.");
            var file = File.Create($"{Name}.json");
            file.Close();
        }
    }
    public void Save()
    {
        try
        {
            var json = JsonConvert.SerializeObject(_tables);
            File.WriteAllText($"{Name}.json", json);
        }
        catch
        {
            // slim chance there might be file structure issues.
            // let's attempt to fix that.
            SetupFiles();
        }
    }
    
    public void CreateTable(Table query)
    {
        if (_tables.Any(x => x.Name == query.Name))
        {
            _tables.RemoveAll(x => x.Name == query.Name);
        }
        
        _tables.Add(query);
        Save();
    }

    public string GetValue(GetQuery? query)
    {
        var table = query?.TableName;

        var colName = query?.Key;
        var value = query?.Value;

        if (query?.Select != "*") return "";

        var tableToReturn = _tables.Find(x => x.Name == table);
        var rows = tableToReturn?.Rows?.Where(x => x.Columns?.FirstOrDefault(y => y.Name == colName)?.Value == value)
            .ToArray();

        return JsonConvert.SerializeObject(rows);
    }

    public void SetValue(SetQuery? query)
    {
        var table = query?.TableName;
        var key = query?.Key;
        var value = query?.Value;
        var keySet = query?.KeySet;
        var valueSet = query?.ValueSet;
        
        var tableToReturn = _tables.Find(x => x.Name == table);
        var row = tableToReturn?.Rows?.FirstOrDefault(x => x.Columns?.FirstOrDefault(y => y.Name == key)?.Value == value);
        var column = row?.Columns?.Find(x => x.Name == keySet);
        if (column != null)
            column.Value = valueSet;
        
        Save();
    }

    public void AddToTable(AddQuery? query)
    {
        var table = query?.TableName;
        var columns = query?.Columns;
        var tableToReturn = _tables.Find(x => x.Name == table);
        
        tableToReturn?.Rows?.Add(new Row
        {
            Columns = columns
        });
        Save();
    }
    public static void Loop()
    {
        while (true)
        {
            
        }
    }
}