from .geo import Geo
from .geomesh import *
import bpy.path
import bpy

from bpy_extras.io_utils import axis_conversion

def convert_mesh(geo_model, mesh, obj):
    # Be sure tessface & co are available!
    if not mesh.tessfaces and mesh.polygons:
        mesh.calc_tessface()

    mesh_verts = mesh.vertices  # save a lookup

    has_uv = bool(mesh.tessface_uv_textures)
    if has_uv:
        active_uv_layer = mesh.tessface_uv_textures.active
        if not active_uv_layer:
            has_uv = False
        else:
            active_uv_layer = active_uv_layer.data

    geomesh = GeoMesh()

    texture_name = "white"
    print("len(mesh.tessfaces): %s" % len(mesh.tessfaces))
    print("mesh.tessfaces: %s" % repr(mesh.tessfaces))
    for i, f in enumerate(mesh.tessfaces):
        if has_uv:
            uv = active_uv_layer[i]
            texture_image = uv.image
            uv = [uv.uv1, uv.uv2, uv.uv3, uv.uv4]
            if texture_image is None:
                texture_name = "white"
            else:
                texture_name = texture_image.name
                if texture_name == "":
                    texture_name = bpy.path.display_name_from_filepath(texture_image.filepath)
                if texture_name == "":
                    texture_name = "white"
        else:
            uv = [(0, 0)] * 4
            texture_name = "white"
        f_verts = f.vertices
        verts = []
        norms = []
        groups = []
        geoverts = []
        for i, v_index in enumerate(f_verts):
            v = mesh_verts[v_index]
            verts.append(v.co)
            norms.append(v.normal)
            weights = []
            for weight in v.groups:
                group = obj.vertex_groups[weight.group]
                w = [group.name, weight.weight]
                weights.append(w)
            gv = GeoVertex(v.co, v.normal, uv[i], weights)
            geoverts.append(gv)
        geomesh.addFace(geoverts, texture_name)

        print("face: vertices: %s  uvs: %s norms: %s groups: %s" % (verts, uv, norms, weights))
    geomesh.dump()
    geo_model.loadFromGeoMesh(geomesh)
    #todo:
    pass

def save(operator, context, filepath = "", global_matrix = None, use_mesh_modifiers = True):
    print("export_geo.save(): %s" % (filepath, ))

    geo = Geo()
    geo.getTextureIndex("white.tga")
    geo.getTextureIndex("white")

    body_name = bpy.path.display_name_from_filepath(filepath)
    geo.setName(body_name)

    axis_rotation = axis_conversion('-Y', 'Z', 'Z', 'Y')
    axis_rotation.resize_4x4()

    for ob in context.selected_objects:
        print("Object: %s (%s)" % (ob.name, ob.type))
        if ob.type != "MESH":
            continue
        ob.update_from_editmode()

        if global_matrix is None:
            from mathutils import Matrix
            global_matrix = Matrix()

        # get the modifiers
        mesh = ob.to_mesh(bpy.context.scene, use_mesh_modifiers, "PREVIEW")

        #translate_matrix = Matrix.Translation(-ob.location)
        translate_matrix = Matrix()
        # * ob.matrix_world
        mesh.transform(global_matrix * translate_matrix * axis_rotation)

        mesh.calc_normals()

        geo_model = geo.addModel(ob.name)

        convert_mesh(geo_model, mesh, ob)

    data = geo.saveToData()
    fh = open(filepath, "wb")
    fh.write(data)
    fh.close()

    return {'FINISHED'}