#pragma once

#include <cstdlib>
#include <string>

namespace roro {

// True if `a` is an older release than `b`, comparing "vMAJOR.MINOR.PATCH" and ignoring any
// git-describe suffix ("-3-gabc1234-dirty"). Anything that doesn't parse is never called older.
inline bool parseVersion(const std::string& s, int out[3]) {
    size_t pos = s.size() > 0 && s[0] == 'v' ? 1 : 0;
    for (int i = 0; i < 3; i++) {
        if (pos >= s.size() || s[pos] < '0' || s[pos] > '9') return false;
        char* end;
        out[i] = static_cast<int>(std::strtol(s.c_str() + pos, &end, 10));
        pos = end - s.c_str();
        if (i < 2) {
            if (pos >= s.size() || s[pos] != '.') return false;
            pos++;
        }
    }
    return true;
}

inline bool versionOlder(const std::string& a, const std::string& b) {
    int x[3], y[3];
    if (!parseVersion(a, x) || !parseVersion(b, y)) return false;
    for (int i = 0; i < 3; i++)
        if (x[i] != y[i]) return x[i] < y[i];
    return false;
}

}  // namespace roro