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#include <iostream>
#include <fstream>
#include <vector>
#include <string>

const std::string input = "input.m3u8";
const std::string output = "output.m3u8";

struct AdMarker {
  double time;
  std::string url;
};

bool operator<(const AdMarker& a, const AdMarker& b) {
  return a.time < b.time;
}

int main()
{
    std::vector<std::string> playlist;
    std::vector<AdMarker> markers;

    // Read playlist
    std::ifstream file(input);
    std::string line;
    while (std::getline(file, line))
    {
        playlist.push_back(line);
        if (line[0] != '#')
        {
            // Extract time and add to markers
            size_t pos = line.find(",");
            double time = std::stod(line.substr(0, pos));
            markers.push_back({time, line});
        }
    }

    // Sort markers by time
    std::sort(markers.begin(), markers.end());

    // Insert ad markers
    std::ofstream stream(output);
    for (const auto& line : playlist)
    {
        stream << line << "\n";
        if (line[0] != '#')
        {
            // Check if it's time to insert ad marker
            size_t pos = line.find(",");
            double time = std::stod(line.substr(0, pos));
            while (markers.size() > 0 && markers.front().time < time)
            {
                stream << "#EXT-X-CUE-OUT:DURATION=30,URI=" << markers.front().url << "\n";
                markers.erase(markers.begin());
            }
        }
    }

    return 0;
}