/*

    Copyright 2018 Kion

    Permission is hereby granted, free of charge, to any person obtaining
    a copy of this software and associated documentation files (the
    "Software"), to deal in the Software without restriction, including
    without limitation the rights to use, copy, modify, merge, publish,
    distribute, sublicense, and/or sell copies of the Software, and to
    permit persons to whom the Software is furnished to do so, subject to
    the following conditions:

    The above copyright notice and this permission notice shall be included
    in all copies or substantial portions of the Software.
    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
    OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
    IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
    CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
    TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
    SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

*/

"use strict";

const fs = require("fs");
const THREE = require("three");
const util = require("util");
const buffer = fs.readFileSync("/home/kion/Github/mml2/DAT/ST0F00.BIN");
const SCALE = 0.05;

var ofs = 0x30;
var nb_models = buffer.readUInt32LE(ofs);
console.log("Number of models: %d", nb_models);

ofs = 0x34;
var models = new Array();
for (var i = 0; i < nb_models; i++) {

    var model = {
        "flag": buffer.readUInt32LE(ofs + 0x00),
        "mesh": buffer.readUInt32LE(ofs + 0x04),
        "bone": buffer.readUInt32LE(ofs + 0x08),
        "anim": buffer.readUInt32LE(ofs + 0x0c)
    };

    console.log("Offset: 0x%s", ofs.toString(16));
    console.log("Flag: 0x%s", model.flag.toString(16));
    console.log("Mesh Offset: 0x%s", model.mesh.toString(16));
    console.log("Anim Offset: 0x%s", model.bone.toString(16));
    console.log("Time Offset: 0x%s", model.anim.toString(16));
    console.log();

    if (model.mesh) {
        model.mesh += 0x30;
    }

    if (model.bone) {
        model.bone += 0x30;
    }

    if (model.anim) {
        model.anim += 0x30;
    }

    ofs += 0x10;
    models.push(model);

}

process.exit();
console.log(models);

for (var i = 0; i < models.length; i++) {
var index = i;
read_model(models[index].mesh, models[index].bone, index);
}


function read_model(mesh_ofs, bone_ofs, index) {

    var nb_prim = buffer.readUInt8(mesh_ofs);
    var dword = buffer.readUInt32LE(mesh_ofs);
    var header_ptr = buffer.readUInt32LE(mesh_ofs + 4) + 0x30;
    var med_lod_ptr = buffer.readUInt32LE(mesh_ofs + 8) + 0x30;
    var low_lod_ptr = buffer.readUInt32LE(mesh_ofs + 0x0c) + 0x30;
    var bone_ptr = buffer.readUInt32LE(mesh_ofs + 0x10);
    var hierarchy_ptr = buffer.readUInt32LE(mesh_ofs + 0x14);

    var bone_length = hierarchy_ptr - bone_ptr;
    var nb_bone = Math.floor(bone_length / 6);
    console.log("Number of bones: %d", nb_bone);

    var bones = new Array(nb_prim);
    for(var i = 0; i < bones.length; i++) {
        bones[i] = new THREE.Bone();
    }

    if(bone_ptr) {
        var ofs = bone_ptr + 0x30;
        for(var i = 0; i < nb_bone; i++) {

            if(i === 0) {
                continue;
            }

            var x = buffer.readInt16LE(ofs + (i*6) + 0);
            var y = buffer.readInt16LE(ofs + (i*6) + 2);
            var z = buffer.readInt16LE(ofs + (i*6) + 4);

            bones[i].position.x = x * SCALE * 0.4;
            bones[i].position.y = y * SCALE * -1 * 0.4;
            bones[i].position.z = z * SCALE * 0.4;
            bones[i].updateMatrix();

            console.log("Bone %d (%d %d %d)", i, x, y, z);
        }

    }

    if(hierarchy_ptr) {
        var ofs = hierarchy_ptr + 0x30;

        for(var i = 0; i < nb_bone; i++) {
            var child = buffer.readUInt8(ofs + 0);
            var parent = buffer.readUInt8(ofs + 1);
            ofs += 4;

            if(child === 0) {
                continue;
            }

            bones[parent].add(bones[child]);
        }

    }

    for(var i = 0; i < bones.length; i++) {
        bones[i].updateMatrixWorld();
    }

    console.log("Index: %d, %s (%s)", index, dword.toString(16), bone_ofs ? "yes" : "no");
    console.log("Header Pointer: %s", header_ptr.toString(16));

    var vertices = [];
    var faces = [];
    var vertex_ofs = 0;

    console.log("bone: %s", bone_ofs.toString(16));

    for (var n = 0; n < nb_prim; n++) {

        var header = {
            "nb_tri": buffer.readUInt8(header_ptr + (n*0x10) + 0x00),
            "nb_quad": buffer.readUInt8(header_ptr + (n*0x10) + 0x01),
            "nb_vert": buffer.readUInt8(header_ptr + (n*0x10) + 0x02),
            "tri_ofs": buffer.readUInt32LE(header_ptr + (n*0x10) + 0x04) + 0x30,
            "quad_ofs": buffer.readUInt32LE(header_ptr + (n*0x10) + 0x08) + 0x30,
            "vert_ofs": buffer.readUInt32LE(header_ptr + (n*0x10) + 0x0c) + 0x30
        };

        var mask = 0b1111111;

        var ofs = header.tri_ofs;
        for (var i = 0; i < header.nb_tri; i++) {
            var dword = buffer.readUInt32LE(ofs + 8);
            var a = dword & mask;
            var b = (dword >> 7) & mask;
            var c = (dword >> 14) & mask;
            ofs += 0x0c;
            faces.push({
                "a": a + vertex_ofs,
                "b": b + vertex_ofs,
                "c": c + vertex_ofs
            });
        }

        var ofs = header.quad_ofs;
        for (var i = 0; i < header.nb_quad; i++) {
            var dword = buffer.readUInt32LE(ofs + 8);
            var a = dword & mask;
            var b = (dword >> 7) & mask;
            var c = (dword >> 14) & mask;
            var d = (dword >> 21) & mask;
            ofs += 0x0c;

            faces.push({
                "a": a + vertex_ofs,
                "b": b + vertex_ofs,
                "c": c + vertex_ofs
            });

            faces.push({
                "a": b + vertex_ofs,
                "b": d + vertex_ofs,
                "c": c + vertex_ofs
            });

        }


        mask = 0b1111111111;
        var msb = 0b1000000000;
        var lsb = 0b0111111111;
        var ofs = header.vert_ofs;

        for (var i = 0; i < header.nb_vert; i++) {

            var dword = buffer.readUInt32LE(ofs);
            ofs += 4;

            var x = dword & mask;
            var y = (dword >> 10) & mask;
            var z = (dword >> 20) & mask;

            if (x & msb) {
                x = (msb - (x & lsb)) * -1;
            }

            if (y & msb) {
                y = (msb - (y & lsb)) * -1;
            }

            if (z & msb) {
                z = (msb - (z & lsb)) * -1;
            }

            x *= SCALE;
            y *= SCALE * -1;
            z *= SCALE;

            var vertex = new THREE.Vector3(x, y, z);
            vertex.applyMatrix4(bones[n].matrixWorld);

            vertices.push({
                "x": vertex.x,
                "y": vertex.y,
                "z": vertex.z
            });

        }

        vertex_ofs += header.nb_vert;
    }

    var out = "";
    vertices.forEach(function (v) {
        out += util.format("v %s %s %s\n", v.x.toFixed(2), v.y.toFixed(2), v.z.toFixed(2));
    });

    faces.forEach(function (f) {
        out += util.format("f %d %d %d\n", f.a + 1, f.b + 1, f.c + 1);
    });

    fs.writeFileSync("mesh_" + index + ".obj", out);

}