using System.Collections.Concurrent;

namespace MesETL.App.Services;

/// <summary>
/// 处理上下文类，标识处理进度
/// </summary>
public class ProcessContext
{
    private bool _hasException;
    private long _inputCount;
    private long _transformCount;
    private long _outputCount;
    private readonly ConcurrentDictionary<string, long> _tableProgress = new();
    public bool HasException => _hasException;
    public bool IsInputCompleted { get; private set; }
    public bool IsTransformCompleted { get; private set; }
    public bool IsOutputCompleted { get; private set; }

    public long InputCount
    {
        get => _inputCount;
        set => Interlocked.Exchange(ref _inputCount, value);
    }

    public long TransformCount
    {
        get => _transformCount;
        set => Interlocked.Exchange(ref _transformCount, value);
    }

    public long OutputCount
    {
        get => _outputCount;
        set => Interlocked.Exchange(ref _outputCount, value);
    }


    // TableName -> Count
    public IReadOnlyDictionary<string, long> TableProgress => _tableProgress;

    public void CompleteInput() => IsInputCompleted = true;

    public void CompleteTransform() => IsTransformCompleted = true;
    public void CompleteOutput() => IsOutputCompleted = true;
    public bool AddException(Exception e) => _hasException = true;

    public void AddInput() => Interlocked.Increment(ref _inputCount);

    public void AddInput(int count) => Interlocked.Add(ref _inputCount, count);

    public void AddTransform() => Interlocked.Increment(ref _transformCount);
    public void AddTransform(int count) => Interlocked.Add(ref _transformCount, count);

    public void AddOutput() => Interlocked.Increment(ref _outputCount);
    public void AddOutput(int count) => Interlocked.Add(ref _outputCount, count);

    public void AddTableOutput(string table, int count)
    {
        _tableProgress.AddOrUpdate(table, count, (k, v) => v + count);
        AddOutput(count);
    }

    public long GetTableOutput(string table)
    {
        if(!_tableProgress.TryGetValue(table, out var count))
            throw new ApplicationException($"未找到表{table}输出记录");
        return count;
    }
}