// M2 T1 —— .msa 解析（照 EterGrnLib/Util.cpp CGrannyMotion::LoadMotionData 的字段）。
#include "msa.h"
#include "textscript.h"
#include <cstdlib>

namespace fmt {

static void vec3(const std::vector<std::string>* l, float* out) {
    if (!l) return;
    for (int k = 0; k < 3 && k + 1 < (int)l->size(); ++k) out[k] = float(std::atof((*l)[k + 1].c_str()));
}

static void loop_data(const Node& root, Msa& out) {
	if (const Node* loop = root.group("LoopData")) {
		out.has_loop_data = true;
		out.motion_loop_count = loop->inum("MotionLoopCount", -1);
		out.loop_cancel_enable = loop->inum("LoopCancelEnable", 0) != 0;
		out.loop_start_time = loop->num("LoopStartTime");
		out.loop_end_time = loop->num("LoopEndTime");
	}
}

bool parse_msa(const std::string& text, Msa& out, std::string* err) {
    Node root;
    if (!parse_textscript(text, root, err)) return false;
    out = Msa{};

    out.motion_gr2 = root.str("MotionFileName");
    out.duration   = root.num("MotionDuration");
    vec3(root.find("Accumulation"), out.accumulation);
	loop_data(root, out);

    if (const Node* med = root.group("MotionEventData")) {
        int count = med->inum("MotionEventDataCount", int(med->groups.size()));
        (void)count;
        for (const Node& ev : med->groups) {
            MotionEvent e;
            e.type        = ev.inum("MotionEventType");
            e.start_time  = ev.num("StartingTime");
            e.effect_file = ev.str("EffectFileName");
            e.sound_file  = ev.str("SoundFileName");
            vec3(ev.find("EffectPosition"), e.position);
            out.events.push_back(std::move(e));
        }
    }

    if (out.motion_gr2.empty()) { if (err) *err = "msa: 缺 MotionFileName"; return false; }
    return true;
}

bool parse_msa_file(const std::string& path, Msa& out, std::string* err) {
    Node root;
    if (!parse_textscript_file(path, root, err)) return false;
    // 复用上面逻辑：重解析文本更简单，这里直接从 root 走一遍
    out = Msa{};
    out.motion_gr2 = root.str("MotionFileName");
    out.duration   = root.num("MotionDuration");
    vec3(root.find("Accumulation"), out.accumulation);
	loop_data(root, out);
    if (const Node* med = root.group("MotionEventData"))
        for (const Node& ev : med->groups) {
            MotionEvent e;
            e.type = ev.inum("MotionEventType");
            e.start_time = ev.num("StartingTime");
            e.effect_file = ev.str("EffectFileName");
            e.sound_file = ev.str("SoundFileName");
            vec3(ev.find("EffectPosition"), e.position);
            out.events.push_back(std::move(e));
        }
    if (out.motion_gr2.empty()) { if (err) *err = "msa: 缺 MotionFileName (" + path + ")"; return false; }
    return true;
}

} // namespace fmt