// SPDX-FileCopyrightText: 2025 Filip Leonarski, Paul Scherrer Institute <filip.leonarski@psi.ch>
// SPDX-License-Identifier: GPL-3.0-only

#include <bitset>

#include "ImageSpotFinder.h"
#include "StrongPixelSet.h"

ImageSpotFinder::ImageSpotFinder(int32_t width, int32_t height)
: width(width), height(height), input_buffer(width * height), output_buffer(width * height / 32 + 1) {}

size_t ImageSpotFinder::OutputSize() const {
    return (width * height) / 32 + ((width * height % 32 != 0) ? 1 : 0);
}

size_t ImageSpotFinder::OutputByteSize() const {
    return OutputSize() * sizeof(uint32_t);
}

std::vector<int32_t> &ImageSpotFinder::GetInputBuffer() {
    return input_buffer;
}

std::vector<DiffractionSpot> ImageSpotFinder::ExtractSpots(const SpotFindingSettings &settings, const std::vector<bool> &res_mask) {
    StrongPixelSet pixel_set;

    for (int i = 0; i < OutputSize(); i++) {
        if (output_buffer[i]) {
            std::bitset<32> bset = output_buffer[i];
            for (int bit = 0; bit < 32; bit++) {
                if (bset.test(bit)) {
                    size_t npixel = i * 32 + bit;
                    size_t col = npixel % width;
                    size_t line = npixel / width;
                    if (line < height && res_mask[npixel] == 0)
                        pixel_set.AddStrongPixel(col, line, input_buffer[npixel]);
                }
            }
        }
    }

    std::vector<DiffractionSpot> vec;
    pixel_set.FindSpotsImage(settings, vec);
    return vec;
}