using ConsoleApp2.Const;
using ConsoleApp2.Helpers;
using ConsoleApp2.HostedServices.Abstractions;
using ConsoleApp2.Options;
using ConsoleApp2.Services;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;

namespace ConsoleApp2.HostedServices;

/// <summary>
/// 从MyDumper导出的CSV文件中导入表头和数据
/// </summary>
public class InputService : IInputService
{
    private readonly ILogger _logger;
    private readonly IOptions<DataInputOptions> _dataInputOptions;
    private readonly ProcessContext _context;

    public InputService(ILogger<InputService> logger,
            IOptions<DataInputOptions> dataInputOptions,
            ProcessContext context)
    {
        _logger = logger;
        _dataInputOptions = dataInputOptions;
        _context = context;
    }

    public async Task ExecuteAsync(TasksOptions tasksOptions, DataRecordQueue producerQueue, ProcessContext context,CancellationToken cancellationToken)
    {
        var inputDir = _dataInputOptions.Value.InputDir;
        _logger.LogInformation("***** Csv input service start, working dir: {InputDir}, thread id: {ThreadId} *****", inputDir, Environment.CurrentManagedThreadId);
        var files = Directory.GetFiles(inputDir);
        if (files.Length == 0)
        {
            _logger.LogInformation("No source files found in {InputDir}", inputDir);
            return;
        }
        var count = 0;
        foreach (var tableName in tasksOptions.TableInfoConfig.Keys)
        {
            _logger.LogInformation("Working table: {tableName}", tableName);
            var source = _dataInputOptions.Value.CreateSource?.Invoke(tableName);
            await source.DoEnqueue((record) =>
            {
                _context.AddInput();
                producerQueue.Enqueue(record);
                count++;

            });
            if (_context.GetExceptions().Count > 0)
            {
                _logger.LogInformation("***** Csv input service is canceled *****");
                return;
            }
            _logger.LogInformation("table:'{tableName}' input completed", tableName);
        }

        context.CompleteInput();
        _logger.LogInformation("***** Csv input service completed *****");
    }
}