using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
using System.Threading.Tasks;
using HandlebarsDotNet;
using SmartCode.Configuration;
using SmartCode.Utilities;

namespace SmartCode.App.Outputs
{
    public class FileOutput : IOutput
    {
        private readonly ILogger<FileOutput> _logger;

        public FileOutput(ILogger<FileOutput> logger)
        {
            _logger = logger;
        }

        public bool Initialized { get; private set; }

        public string Name { get; private set; } = "File";

        public void Initialize(IDictionary<string, object> parameters)
        {
            if (parameters == null)
            {
                return;
            }

            if (parameters.Value(nameof(Name), out string name))
            {
                Name = name;
            }

            Initialized = true;
        }

        public async Task Output(BuildContext context, Output output = null)
        {
            if (output == null)
            {
                output = context.Output;
            }

            _logger.LogInformation($"------ Mode:{output.Mode},Build:{context.BuildKey} Start! ------");

            var outputPath = Handlebars.Compile(output.Path)(context);
            outputPath = Path.Combine(context.Project.OutputPath, outputPath);
            if (output.DotSplit == true)
            {
                outputPath = outputPath.Replace('.', '/');
            }

            if (!Directory.Exists(outputPath))
            {
                Directory.CreateDirectory(outputPath);
                _logger.LogWarning($"------ Directory:{outputPath} is not Exists,Created! ------");
            }

            var fileName = Handlebars.Compile(output.Name)(context) + output.Extension;
            var filePath = Path.Combine(outputPath, fileName);
            var fileExists = File.Exists(filePath);
            if (fileExists)
            {
                switch (output.Mode)
                {
                    case Configuration.CreateMode.None:
                    case Configuration.CreateMode.Incre:
                    {
                        _logger.LogWarning(
                            $"------ Mode:{output.Mode},Build:{context.BuildKey},FilePath:{filePath} Exists ignore output End! ------");
                        return;
                    }
                    case Configuration.CreateMode.Full:
                    {
                        File.Delete(filePath);
                        _logger.LogWarning($"------ Mode:{output.Mode},FilePath:{filePath} Exists Deleted ! ------");
                        break;
                    }
                }
            }

            using (StreamWriter streamWriter = new StreamWriter(filePath))
            {
                await streamWriter.WriteAsync(context.Result.Trim());
            }

            _logger.LogInformation($"------ Mode:{output.Mode},Build:{context.BuildKey} -> {filePath} End! ------");
        }
    }
}