using TextCopy;

namespace DevDisciples.Json.Tools.CLI;

public static class IOHandler
{
    public static async Task<string> HandleInput(InputOptions input, string? inputArgument, FileInfo? inputFile)
    {
        string json;

        switch (input)
        {
            case InputOptions.s:
            case InputOptions.std:
            case InputOptions.stdin:
                json = inputArgument ?? string.Empty;
                break;

            case InputOptions.c:
            case InputOptions.clip:
            case InputOptions.clipboard:
                json = await ClipboardService.GetTextAsync() ?? string.Empty;
                break;

            case InputOptions.f:
            case InputOptions.file:
                if (inputFile is null)
                    throw new ArgumentException("Input file was not specified.");

                if (!inputFile.Exists)
                    throw new FileNotFoundException($"File {inputFile.FullName} does not exist.");

                json = await File.ReadAllTextAsync(inputFile.FullName);
                break;

            default:
                throw new Exception($"Input type '{input}' is not supported.");
        }

        return json.Trim();
    }

    public static async Task HandleOutput(OutputOptions output, FileInfo? outputFile, string result)
    {
        switch (output)
        {
            case OutputOptions.s:
            case OutputOptions.std:
            case OutputOptions.stdout:
                Console.WriteLine(result);
                break;

            case OutputOptions.c:
            case OutputOptions.clip:
            case OutputOptions.clipboard:
                await ClipboardService.SetTextAsync(result);
                break;

            case OutputOptions.f:
            case OutputOptions.file:
                if (outputFile is null)
                    throw new ArgumentException("Output file was not specified.");

                if (outputFile.Exists)
                    throw new Exception($"File {outputFile.FullName} already exists.");

                await File.WriteAllTextAsync(outputFile.FullName, result);
                break;

            default:
                throw new Exception($"Output type '{output}' is not supported.");
        }
    }
}