#include "map_setting.h"

#include "m2_tokvec.h"

#include <cstdlib>

namespace fmt {

bool parse_map_setting(const std::string& text, MapSetting& out, std::string* err) {
    TokVecMap tv;
    std::string perr;
    parse_tokvec(text, tv, &perr);

    out = MapSetting{};

    if (!tv.has("mapsize")) {
        if (err) *err = "setting.txt 缺 MapSize";
        return false;
    }
    if (const auto* v = tv.find("mapsize"); v && v->size() >= 2) {
        out.map_size_x = (int)std::strtol((*v)[0].c_str(), nullptr, 10);
        out.map_size_y = (int)std::strtol((*v)[1].c_str(), nullptr, 10);
    } else {
        if (err) *err = "setting.txt MapSize 需要两个整数";
        return false;
    }
    if (out.map_size_x <= 0 || out.map_size_y <= 0) {
        if (err) *err = "setting.txt MapSize 非法";
        return false;
    }

    if (tv.has("cellscale")) out.cell_scale = (int)tv.inum("cellscale");
    if (tv.has("heightscale")) out.height_scale = tv.num("heightscale");
    out.view_radius = (int)tv.inum("viewradius", 0);

    if (const auto* v = tv.find("baseposition"); v && v->size() >= 2) {
        out.base_position_x = std::strtol((*v)[0].c_str(), nullptr, 10);
        out.base_position_y = std::strtol((*v)[1].c_str(), nullptr, 10);
    }

    out.texture_set = tv.str("textureset");
    out.environment = tv.str("environment");

    if (out.cell_scale <= 0) {
        if (err) *err = "setting.txt CellScale 非法";
        return false;
    }
    return true;
}

bool parse_map_setting_file(const std::string& path, MapSetting& out, std::string* err) {
    std::string text;
    if (!read_file(path, text)) {
        if (err) *err = "打不开 " + path;
        return false;
    }
    return parse_map_setting(text, out, err);
}

} // namespace fmt