package com.replaymod.render;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.Getter;
import net.minecraft.client.Minecraft;
import net.minecraft.client.resources.I18n;
import net.minecraft.util.Util;
import org.lwjgl.util.ReadableColor;

import java.io.File;
import java.util.Arrays;
import java.util.Comparator;
import java.util.Optional;

import static com.replaymod.render.ReplayModRender.LOGGER;

//#if MC>=10800
import net.minecraftforge.fml.common.versioning.ComparableVersion;
//#else
//$$ import cpw.mods.fml.common.versioning.ComparableVersion;
//#endif

@Data
public class RenderSettings {
    public enum RenderMethod {
        DEFAULT, STEREOSCOPIC, CUBIC, EQUIRECTANGULAR, ODS;

        @Override
        public String toString() {
            return I18n.format("replaymod.gui.rendersettings.renderer." + name().toLowerCase());
        }

        public String getDescription() {
            return I18n.format("replaymod.gui.rendersettings.renderer." + name().toLowerCase() + ".description");
        }

        public boolean isSpherical() {
            return this == EQUIRECTANGULAR || this == ODS;
        }

        public boolean hasFixedAspectRatio() {
            return this == EQUIRECTANGULAR || this == ODS || this == CUBIC;
        }
    }

    public enum EncodingPreset {
        MP4_CUSTOM("-an -c:v libx264 -b:v %BITRATE% -pix_fmt yuv420p \"%FILENAME%\"", "mp4"),

        MP4_HIGH("-an -c:v libx264 -preset ultrafast -qp 1 -pix_fmt yuv420p \"%FILENAME%\"", "mp4"),

        MP4_DEFAULT("-an -c:v libx264 -preset ultrafast -pix_fmt yuv420p \"%FILENAME%\"", "mp4"),

        MP4_POTATO("-an -c:v libx264 -preset ultrafast -crf 51 -pix_fmt yuv420p \"%FILENAME%\"", "mp4"),

        WEBM_CUSTOM("-an -c:v libvpx -b:v %BITRATE% \"%FILENAME%\"", "webm"),

        MKV_LOSSLESS("-an -c:v libx264 -preset ultrafast -qp 0 \"%FILENAME%\"", "mkv"),

        PNG("\"%FILENAME%-%06d.png\"", "png");

        private final String preset;
        private final String fileExtension;

        EncodingPreset(String preset, String fileExtension) {
            this.preset = preset;
            this.fileExtension = fileExtension;
        }

        public String getValue() {
            return "-y -f rawvideo -pix_fmt rgb24 -s %WIDTH%x%HEIGHT% -r %FPS% -i - %FILTERS%" + preset;
        }

        public String getFileExtension() {
            return fileExtension;
        }

        public boolean hasBitrateSetting() {
            return preset.contains("%BITRATE%");
        }

        public boolean isYuv420() { return preset.contains("-pix_fmt yuv420p"); }

        @Override
        public String toString() {
            return I18n.format("replaymod.gui.rendersettings.presets." + name().replace('_', '.').toLowerCase());
        }
    }

    @AllArgsConstructor
    public enum AntiAliasing {
        NONE(1), X2(2), X4(4), X8(8);

        @Getter
        private final int factor;

        @Override
        public String toString() {
            return I18n.format("replaymod.gui.rendersettings.antialiasing." + name().toLowerCase());
        }
    }

    private final RenderMethod renderMethod;
    private final EncodingPreset encodingPreset;
    private final int videoWidth;
    private final int videoHeight;
    private final int framesPerSecond;
    private final int bitRate;
    private final File outputFile;

    private final boolean renderNameTags;
    private final boolean stabilizeYaw;
    private final boolean stabilizePitch;
    private final boolean stabilizeRoll;
    private final ReadableColor chromaKeyingColor;
    private final int sphericalFovX;
    private final int sphericalFovY;
    private final boolean injectSphericalMetadata;
    private final AntiAliasing antiAliasing;

    private final String exportCommand;
    private final String exportArguments;

    private final boolean highPerformance;

    /**
     * @return the width of the output video during rendering, including the upscale for Anti-Aliasing.
     */
    public int getVideoWidth() {
        return videoWidth * antiAliasing.getFactor();
    }

    /**
     * @return the height of the output video during rendering, including the upscale for Anti-Aliasing.
     */
    public int getVideoHeight() {
        return videoHeight * antiAliasing.getFactor();
    }

    /**
     * @return the actual width of the output video.
     */
    public int getTargetVideoWidth() {
        return videoWidth;
    }

    /**
     * @return the actual height of the output video.
     */
    public int getTargetVideoHeight() {
        return videoHeight;
    }

    public String getVideoFilters() {
        StringBuilder filters = new StringBuilder();

        if (antiAliasing != AntiAliasing.NONE) {
            double factor = 1.0 / antiAliasing.getFactor();
            filters.append(String.format("-filter:v scale=iw*%1$s:ih*%1$s ", factor));
        }

        return filters.toString();
    }

    public String getExportCommandOrDefault() {
        return exportCommand.isEmpty() ? findFFmpeg() : exportCommand;
    }

    private static String findFFmpeg() {
        switch (Util.getOSType()) {
            case WINDOWS:
                // Allow windows users to unpack the ffmpeg archive into a sub-folder of their .minecraft folder
                File inDotMinecraft = new File(Minecraft.getMinecraft().mcDataDir, "ffmpeg/bin/ffmpeg.exe");
                if (inDotMinecraft.exists()) {
                    LOGGER.debug("FFmpeg found in .minecraft/ffmpeg");
                    return inDotMinecraft.getAbsolutePath();
                }
                break;
            case OSX:
                // The PATH doesn't seem to be set as expected on OSX, therefore we check some common locations ourselves
                for (String path : new String[]{"/usr/local/bin/ffmpeg", "/usr/bin/ffmpeg"}) {
                    File file = new File(path);
                    if (file.exists()) {
                        LOGGER.debug("Found FFmpeg at {}", path);
                        return path;
                    } else {
                        LOGGER.debug("FFmpeg not located at {}", path);
                    }
                }
                // Homebrew doesn't seem to reliably symlink its installed binaries either
                File homebrewFolder = new File("/usr/local/Cellar/ffmpeg");
                String[] homebrewVersions = homebrewFolder.list();
                if (homebrewVersions != null) {
                    Optional<File> latestOpt = Arrays.stream(homebrewVersions)
                            .map(ComparableVersion::new) // Convert file name to comparable version
                            .sorted(Comparator.reverseOrder()) // Sort for latest version
                            .map(ComparableVersion::toString) // Convert back to file name
                            .map(v -> new File(new File(homebrewFolder, v), "bin/ffmpeg")) // Convert to binary files
                            .filter(File::exists) // Filter invalid installations (missing executable)
                            .findFirst(); // Take first one
                    if (latestOpt.isPresent()) {
                        File latest = latestOpt.get();
                        LOGGER.debug("Found {} versions of FFmpeg installed with homebrew, chose {}",
                                homebrewVersions.length, latest);
                        return latest.getAbsolutePath();
                    }
                }
                break;
            case LINUX: // Linux users are entrusted to have their PATH configured correctly (most package manager do this)
            case SOLARIS: // Never heard of anyone running this mod on Solaris having any problems
            case UNKNOWN: // Unknown OS, just try to use "ffmpeg"
        }
        LOGGER.debug("Using default FFmpeg executable");
        return "ffmpeg";
    }

}