using System.Net.Http.Json;
using BenchmarkDotNet.Attributes;
using StitchATon2.Domain;

namespace StitchATon2.Benchmark;

public class SingleTileBenchmark
{
    private const string Url = "http://localhost:5088/api/image/generate";
    private readonly TileManager _tileManager = new(Configuration.Default);
    private readonly Random _random = new();
    private readonly HttpClient _client = new();

    private string GetRandomCoordinatePair()
    {
        var maxId = _tileManager.Configuration.Rows
                    * _tileManager.Configuration.Columns;
        
        var id = _random.Next(maxId);
        var tile = _tileManager.GetTile(id);
        return $"{tile.Coordinate}:{tile.Coordinate}";
    }

    private JsonContent GetRandomDto(float scale, float offsetX = 0, float offsetY = 0)
    {
        return JsonContent.Create(new
        {
            canvas_rect = GetRandomCoordinatePair(),
            crop_offset = (float[]) [offsetX, offsetY],
            crop_size = (float[]) [1f - offsetX, 1f -  offsetY],
            output_scale = scale,
        });
    }

    private JsonContent GetRandomDtoWithOffset(float scale)
    {
        var offsetX = _random.NextSingle();
        var offsetY = _random.NextSingle();
        return GetRandomDto(scale, offsetX, offsetY);
    }

    [Benchmark]
    public async Task NoScaling()
    {
        await _client.PostAsync(Url, GetRandomDto(1f));
    }
    
    [Benchmark]
    public async Task ScaleHalf()
    {        
        await _client.PostAsync(Url, GetRandomDto(.5f));
    }
    
    [Benchmark]
    public async Task ScaleQuarter()
    {
        await _client.PostAsync(Url, GetRandomDto(.25f));
    }

    [Benchmark]
    public async Task NoScalingWithOffset()
    {
        await _client.PostAsync(Url, GetRandomDtoWithOffset(1f));
    }
    
    [Benchmark]
    public async Task ScaleHalfWithOffset()
    {        
        await _client.PostAsync(Url, GetRandomDtoWithOffset(.5f));
    }
    
    [Benchmark]
    public async Task ScaleQuarterWithOffset()
    {
        await _client.PostAsync(Url, GetRandomDtoWithOffset(.25f));
    }
}