using System;

namespace ADOFAIRenderer.API
{
    /// <summary>
    /// Represents the result and metadata of a completed or cancelled render session.
    /// </summary>
    public class RenderResult
    {
        /// <summary>
        /// Indicates whether the rendering session completed successfully.
        /// </summary>
        public bool Success { get; }

        /// <summary>
        /// The absolute output path of the rendered video file. Empty string if rendering failed or output was not created.
        /// </summary>
        public string OutputPath { get; }

        /// <summary>
        /// Total number of video frames sent to the encoder.
        /// </summary>
        public long TotalFrames { get; }

        /// <summary>
        /// The calculated video duration in seconds (based on TotalFrames and FPS).
        /// </summary>
        public double VideoDuration { get; }

        /// <summary>
        /// Total wall-clock time spent rendering.
        /// </summary>
        public TimeSpan RenderDuration { get; }

        /// <summary>
        /// File size of the output video in bytes (0 if failed or file does not exist).
        /// </summary>
        public long FileSizeBytes { get; }

        /// <summary>
        /// Error message or reason if rendering failed or was cancelled; <c>null</c> on success.
        /// </summary>
        public string? ErrorMessage { get; }

        public RenderResult(
            bool success,
            string outputPath,
            long totalFrames,
            double videoDuration,
            TimeSpan renderDuration,
            long fileSizeBytes = 0,
            string? errorMessage = null)
        {
            Success = success;
            OutputPath = outputPath;
            TotalFrames = totalFrames;
            VideoDuration = videoDuration;
            RenderDuration = renderDuration;
            FileSizeBytes = fileSizeBytes;
            ErrorMessage = errorMessage;
        }

        public override string ToString()
        {
            return Success
                ? $"[RenderResult: Success, Output={OutputPath}, Frames={TotalFrames}, VideoDuration={VideoDuration:F2}s, Time={RenderDuration.TotalSeconds:F1}s, Size={FileSizeBytes / 1024.0 / 1024.0:F2}MB]"
                : $"[RenderResult: Failed/Cancelled, Error={ErrorMessage ?? "Unknown"}]";
        }
    }
}