#include "Engine/Vfs/mod_music.h"
#include "Engine/Core/Json/json.h"
#include <algorithm>
#include <stdexcept>

namespace dingosdk::mods {
namespace {
bool text_ok(const std::string& value) {
    return !value.empty() && value.size() <= 255 &&
        std::none_of(value.begin(), value.end(), [](unsigned char c) { return c < 32 || c == 127; });
}
}

std::vector<MusicPlaylist> parse_music_playlists(const std::string& mod, const std::string& json) {
    std::vector<MusicPlaylist> result;
    const auto root = Json::parse(json);
    if (!root.contains("schema") || root.at("schema").get<int>() != 1 || !root.contains("playlists") ||
        !root.at("playlists").is_array())
        throw std::runtime_error("expected schema 1 with a playlists array");
    const auto& list = root.at("playlists");
    for (std::size_t i = 0; i < list.size() && i < 64; ++i) {
        const auto& entry = list.at(i);
        if (!entry.contains("name") || !entry.at("name").is_string() || !text_ok(entry.at("name").string()) ||
            !entry.contains("songs") || !entry.at("songs").is_array())
            throw std::runtime_error("a playlist needs a name and a songs array");
        MusicPlaylist playlist{"mod:" + mod + ":" + entry.at("name").string(), entry.at("name").string(), {}};
        const auto& songs = entry.at("songs");
        for (std::size_t s = 0; s < songs.size() && s < 1024; ++s)
            if (songs.at(s).is_string() && text_ok(songs.at(s).string())) playlist.songs.push_back(songs.at(s).string());
        if (text_ok(playlist.id)) result.push_back(std::move(playlist));
    }
    return result;
}

} // namespace dingosdk::mods