#include "BabeDead.hpp"
#include "DataSpec/DNAMP1/MREA.hpp"
#include "DataSpec/DNAMP3/MREA.hpp"
#include "zeus/CTransform.hpp"
#include "hecl/Blender/Connection.hpp"

namespace DataSpec
{

template<class BabeDeadLight>
void ReadBabeDeadLightToBlender(hecl::blender::PyOutStream& os,
                                const BabeDeadLight& light, unsigned s, unsigned l)
{
    switch (light.lightType)
    {
    case BabeDeadLight::LightType::LocalAmbient:
    case BabeDeadLight::LightType::LocalAmbient2:
        os.format("bg_node.inputs[0].default_value = (%f,%f,%f,1.0)\n"
                  "bg_node.inputs[1].default_value = %f\n",
                  light.color.vec[0], light.color.vec[1], light.color.vec[2],
                  light.q / 8.f);
        return;
    case BabeDeadLight::LightType::Directional:
        os.format("lamp = bpy.data.lamps.new('LAMP_%01u_%03u', 'SUN')\n"
                  "lamp_obj = bpy.data.objects.new(lamp.name, lamp)\n"
                  "lamp_obj.rotation_mode = 'QUATERNION'\n"
                  "lamp_obj.rotation_quaternion = Vector((0,0,-1)).rotation_difference(Vector((%f,%f,%f)))\n"
                  "lamp.shadow_method = '%s'\n"
                  "\n", s, l,
                  light.direction.vec[0], light.direction.vec[1], light.direction.vec[2],
                  light.castShadows ? "RAY_SHADOW" : "NOSHADOW");
        return;
    case BabeDeadLight::LightType::Custom:
        os.format("lamp = bpy.data.lamps.new('LAMP_%01u_%03u', 'POINT')\n"
                  "lamp_obj = bpy.data.objects.new(lamp.name, lamp)\n"
                  "lamp.shadow_method = '%s'\n"
                  "\n", s, l, light.castShadows ? "RAY_SHADOW" : "NOSHADOW");
        break;
    case BabeDeadLight::LightType::Spot:
    case BabeDeadLight::LightType::Spot2:
        os.format("lamp = bpy.data.lamps.new('LAMP_%01u_%03u', 'SPOT')\n"
                  "lamp.spot_size = %.6g\n"
                  "lamp_obj = bpy.data.objects.new(lamp.name, lamp)\n"
                  "lamp_obj.rotation_mode = 'QUATERNION'\n"
                  "lamp_obj.rotation_quaternion = Vector((0,0,-1)).rotation_difference(Vector((%f,%f,%f)))\n"
                  "lamp.shadow_method = '%s'\n"
                  "\n", s, l,
                  zeus::degToRad(light.spotCutoff),
                  light.direction.vec[0], light.direction.vec[1], light.direction.vec[2],
                  light.castShadows ? "RAY_SHADOW" : "NOSHADOW");
        break;
    default: return;
    }

    os.format("lamp.retro_layer = %u\n"
              "lamp.retro_origtype = %u\n"
              "lamp.falloff_type = 'INVERSE_COEFFICIENTS'\n"
              "lamp.constant_coefficient = 0\n"
              "lamp.use_nodes = True\n"
              "falloff_node = lamp.node_tree.nodes.new('ShaderNodeLightFalloff')\n"
              "lamp.energy = 0.0\n"
              "falloff_node.inputs[0].default_value = %f\n"
              "hue_sat_node = lamp.node_tree.nodes.new('ShaderNodeHueSaturation')\n"
              "hue_sat_node.inputs[1].default_value = 1.25\n"
              "hue_sat_node.inputs[4].default_value = (%f,%f,%f,1.0)\n"
              "lamp.node_tree.links.new(hue_sat_node.outputs[0], lamp.node_tree.nodes['Emission'].inputs[0])\n"
              "lamp_obj.location = (%f,%f,%f)\n"
              "bpy.context.scene.objects.link(lamp_obj)\n"
              "\n", s, light.lightType, light.q / 8.f,
              light.color.vec[0], light.color.vec[1], light.color.vec[2],
              light.position.vec[0], light.position.vec[1], light.position.vec[2]);

    switch (light.falloff)
    {
    case BabeDeadLight::Falloff::Constant:
        os << "falloff_node.inputs[0].default_value *= 75.0\n"
              "lamp.node_tree.links.new(falloff_node.outputs[2], lamp.node_tree.nodes['Emission'].inputs[1])\n";
        if (light.q > FLT_EPSILON)
            os.format("lamp.constant_coefficient = 2.0 / %f\n", light.q);
        break;
    case BabeDeadLight::Falloff::Linear:
        os << "lamp.node_tree.links.new(falloff_node.outputs[1], lamp.node_tree.nodes['Emission'].inputs[1])\n";
        if (light.q > FLT_EPSILON)
            os.format("lamp.linear_coefficient = 250 / %f\n", light.q);
        break;
    case BabeDeadLight::Falloff::Quadratic:
        os << "lamp.node_tree.links.new(falloff_node.outputs[0], lamp.node_tree.nodes['Emission'].inputs[1])\n";
        if (light.q > FLT_EPSILON)
            os.format("lamp.quadratic_coefficient = 25000 / %f\n", light.q);
        break;
    default: break;
    }
}

template void ReadBabeDeadLightToBlender<DNAMP1::MREA::BabeDeadLight>
(hecl::blender::PyOutStream& os, const DNAMP1::MREA::BabeDeadLight& light, unsigned s, unsigned l);
template void ReadBabeDeadLightToBlender<DNAMP3::MREA::BabeDeadLight>
(hecl::blender::PyOutStream& os, const DNAMP3::MREA::BabeDeadLight& light, unsigned s, unsigned l);

template<class BabeDeadLight>
void WriteBabeDeadLightFromBlender(BabeDeadLight& lightOut, const hecl::blender::Light& lightIn)
{
    using InterType = hecl::blender::Light::Type;
    switch (lightIn.type)
    {
    case InterType::Ambient:
        lightOut.lightType = BabeDeadLight::LightType::LocalAmbient;
        break;
    case InterType::Directional:
        lightOut.lightType = BabeDeadLight::LightType::Directional;
        break;
    case InterType::Custom:
    default:
        lightOut.lightType = BabeDeadLight::LightType::Custom;
        break;
    case InterType::Spot:
        lightOut.lightType = BabeDeadLight::LightType::Spot;
        break;
    }

    if (lightIn.type == InterType::Ambient)
    {
        lightOut.falloff = BabeDeadLight::Falloff::Constant;
        lightOut.q = lightIn.energy * 8.f;
    }
    else if (lightIn.linear > lightIn.constant &&
             lightIn.linear > lightIn.quadratic)
    {
        lightOut.falloff = BabeDeadLight::Falloff::Linear;
        lightOut.q = 1.f / (lightIn.linear / 250.f);
    }
    else if (lightIn.quadratic > lightIn.constant &&
             lightIn.quadratic > lightIn.linear)
    {
        lightOut.falloff = BabeDeadLight::Falloff::Quadratic;
        lightOut.q = 1.f / (lightIn.quadratic / 25000.f);
    }
    else
    {
        lightOut.falloff = BabeDeadLight::Falloff::Constant;
        lightOut.q = 1.f / (lightIn.constant / 2.f);
    }

    lightOut.color = lightIn.color;
    lightOut.spotCutoff = zeus::radToDeg(lightIn.spotCutoff);
    lightOut.castShadows = lightIn.shadow;
    lightOut.position.vec[0] = lightIn.sceneXf[0].vec[3];
    lightOut.position.vec[1] = lightIn.sceneXf[1].vec[3];
    lightOut.position.vec[2] = lightIn.sceneXf[2].vec[3];

    zeus::CTransform lightXf(&lightIn.sceneXf[0]);
    lightOut.direction = (lightXf.basis.transposed() * zeus::CVector3f(0.f, 0.f, -1.f)).normalized();
}

template void WriteBabeDeadLightFromBlender<DNAMP1::MREA::BabeDeadLight>
(DNAMP1::MREA::BabeDeadLight& lightOut, const hecl::blender::Light& lightIn);
template void WriteBabeDeadLightFromBlender<DNAMP3::MREA::BabeDeadLight>
(DNAMP3::MREA::BabeDeadLight& lightOut, const hecl::blender::Light& lightIn);

}