#ifndef PKMNLIB_ANGELSCRIPTMETADATA_HPP
#define PKMNLIB_ANGELSCRIPTMETADATA_HPP
#include <Arbutils/Collections/Dictionary.hpp>
#include <Arbutils/String/StringView.hpp>
#include <string>

class AngelscriptMetadata {
public:
    explicit AngelscriptMetadata(const std::string& metadataString) { Parse(metadataString); }

    inline const ArbUt::StringView& GetIdentifier() const noexcept { return _identifier; }
    inline const std::string& GetParameter(const ArbUt::StringView& name) const noexcept {
        return _parameters.Get(name);
    }

private:
    ArbUt::StringView _identifier;
    ArbUt::Dictionary<ArbUt::StringView, std::string> _parameters;

    size_t ReadUpToOrEnd(const std::string& s, const char symbol, size_t start) {
        for (size_t i = start; i < s.length(); ++i) {
            if (s.at(i) == symbol) {
                return i;
            }
        }
        return s.length();
    }

    size_t FindNextNonSpace(const std::string& s, size_t start) {
        for (size_t i = start; i < s.length(); ++i) {
            if (s.at(i) != ' ') {
                return i;
            }
        }
        return s.length();
    }

    void Parse(const std::string& metadataString) {
        auto idEnd = ReadUpToOrEnd(metadataString, ' ', 0);
        _identifier = ArbUt::StringView(metadataString.substr(0, idEnd).c_str(), idEnd);
        auto current = idEnd;
        while (true) {
            current = FindNextNonSpace(metadataString, current);
            if (current >= metadataString.length()) {
                break;
            }
            ParseParameter(metadataString, current);
        }
    }

    void ParseParameter(const std::string& metadataString, size_t& current) {
        auto start = current;
        current = ReadUpToOrEnd(metadataString, '=', current);
        auto name = ArbUt::StringView(metadataString.substr(start, current - start).c_str(), current - start);
        current++;
        start = current;
        auto isQuoted = metadataString[current] == '"';
        if (isQuoted) {
            current++;
            start++;
            current = ReadUpToOrEnd(metadataString, '"', current);
        } else {
            current = ReadUpToOrEnd(metadataString, ' ', current);
        }
        auto value = metadataString.substr(start, current - start);
        _parameters.Insert(name, value);
        if (isQuoted) {
            current += 1;
        }
    }
};

#endif // PKMNLIB_ANGELSCRIPTMETADATA_HPP