// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

using Microsoft.Extensions.Logging;

namespace Microsoft.DotNet.Watch;

internal sealed class ConsoleReporter(IConsole console, string logMessagePrefix, bool suppressEmojis) : IReporter, IProcessOutputReporter
{
    private readonly Lock _writeLock = new();

    bool IProcessOutputReporter.PrefixProcessOutput
        => false;

    void IProcessOutputReporter.ReportOutput(OutputLine line)
    {
        lock (_writeLock)
        {
            (line.IsError ? console.Error : console.Out).WriteLine(line.Content);
        }
    }

    private void WriteLine(TextWriter writer, string message, ConsoleColor? color, Emoji emoji)
    {
        lock (_writeLock)
        {
            console.ForegroundColor = ConsoleColor.DarkGray;
            writer.Write((suppressEmojis ? Emoji.Default : emoji).GetLogMessagePrefix(logMessagePrefix));
            console.ResetColor();

            if (color.HasValue)
            {
                console.ForegroundColor = color.Value;
            }

            writer.WriteLine(message);

            if (color.HasValue)
            {
                console.ResetColor();
            }
        }
    }

    public void Report(EventId id, Emoji emoji, LogLevel level, string message)
    {
        var color = level switch
        {
            LogLevel.Critical or LogLevel.Error => ConsoleColor.Red,
            LogLevel.Warning => ConsoleColor.Yellow,
            LogLevel.Information => (ConsoleColor?)null,
            _ => ConsoleColor.DarkGray,
        };

        // Use stdout for error messages to preserve ordering with respect to other output.
        WriteLine(console.Error, message, color, emoji);
    }
}