// Placeholder effect implementation - logs TODO warning once

#include "effects/placeholder_effect.h"
#include "effects/shaders.h"
#include "gpu/post_process_helper.h"
#include "util/fatal_error.h"
#include <cstdio>

Placeholder::Placeholder(const GpuContext& ctx,
                         const std::vector<std::string>& inputs,
                         const std::vector<std::string>& outputs,
                         float start_time, float end_time,
                         const char* placeholder_name)
    : Effect(ctx, inputs, outputs, start_time, end_time), pipeline_(nullptr),
      bind_group_(nullptr), sampler_(nullptr), name_(placeholder_name) {
  // Log once on construction
  fprintf(stderr, "TODO: %s not yet implemented, using passthrough\n", name_);

  // Headless mode: skip GPU resource creation (compiled out in STRIP_ALL)
  HEADLESS_RETURN_IF_NULL(ctx_.device);

  uniforms_buffer_.init(ctx_.device);
  pipeline_ = create_post_process_pipeline(
      ctx_.device, WGPUTextureFormat_RGBA8Unorm, passthrough_shader_wgsl);

  WGPUSamplerDescriptor sampler_desc = {};
  sampler_desc.addressModeU = WGPUAddressMode_ClampToEdge;
  sampler_desc.addressModeV = WGPUAddressMode_ClampToEdge;
  sampler_desc.addressModeW = WGPUAddressMode_ClampToEdge;
  sampler_desc.magFilter = WGPUFilterMode_Linear;
  sampler_desc.minFilter = WGPUFilterMode_Linear;
  sampler_desc.mipmapFilter = WGPUMipmapFilterMode_Nearest;
  sampler_desc.maxAnisotropy = 1;
  sampler_ = wgpuDeviceCreateSampler(ctx_.device, &sampler_desc);
}

void Placeholder::render(WGPUCommandEncoder encoder,
                         const UniformsSequenceParams& params,
                         NodeRegistry& nodes) {
  WGPUTextureView input_view = nodes.get_view(input_nodes_[0]);
  WGPUTextureView output_view = nodes.get_view(output_nodes_[0]);

  uniforms_buffer_.update(ctx_.queue, params);

  pp_update_bind_group(ctx_.device, pipeline_, &bind_group_, input_view,
                       uniforms_buffer_.get(), {nullptr, 0});

  WGPURenderPassColorAttachment color_attachment = {};
  gpu_init_color_attachment(color_attachment, output_view);

  WGPURenderPassDescriptor pass_desc = {};
  pass_desc.colorAttachmentCount = 1;
  pass_desc.colorAttachments = &color_attachment;

  WGPURenderPassEncoder pass =
      wgpuCommandEncoderBeginRenderPass(encoder, &pass_desc);
  wgpuRenderPassEncoderSetPipeline(pass, pipeline_);
  wgpuRenderPassEncoderSetBindGroup(pass, 0, bind_group_, 0, nullptr);
  wgpuRenderPassEncoderDraw(pass, 3, 1, 0, 0);
  wgpuRenderPassEncoderEnd(pass);
  wgpuRenderPassEncoderRelease(pass);
}