defmodule Raxol.PerformanceTest do
  use ExUnit.Case, async: false

  alias Raxol.Benchmarks.Performance
  alias Raxol.Benchmarks.Performance.Rendering
  alias Raxol.Benchmarks.Performance.EventHandling
  alias Raxol.Benchmarks.Performance.MemoryUsage
  alias Raxol.Benchmarks.Performance.Animation
  alias Raxol.Benchmarks.Performance.Reporting

  @moduletag :performance
  @moduletag :skip
  # 2 minute timeout for performance tests
  @moduletag timeout: 120_000

  describe "rendering performance" do
    test ~c"rendering performance meets requirements" do
      render_results = Rendering.benchmark_rendering()

      # Example assertions (adjust thresholds as needed)
      assert render_results.full_screen_render_time_ms < 16,
             "Full screen render time too high"

      assert render_results.components_per_frame > 100,
             "Components per frame too low"

      assert render_results.renders_per_second > 30,
             "Renders per second too low"
    end
  end

  describe "event handling performance" do
    test ~c"event handling performance meets requirements" do
      event_results = EventHandling.benchmark_event_handling()

      # Example assertions
      assert event_results.keyboard_event_latency_μs < 5000,
             "Keyboard event latency too high"

      assert event_results.mouse_event_latency_μs < 5000,
             "Mouse event latency too high"

      assert event_results.events_per_second > 100,
             "Event throughput too low"
    end
  end

  describe "memory usage" do
    test ~c"memory usage is efficient" do
      memory_results = MemoryUsage.benchmark_memory_usage()

      # Example assertions
      assert memory_results.base_memory_usage_kb < 50_000,
             "Base memory usage too high"

      assert memory_results.rendering_memory_growth_kb < 10_000,
             "Rendering memory growth too high"

      refute memory_results.memory_leak_detected,
             "Potential memory leak detected"

      assert memory_results.memory_efficiency_score > 70,
             "Memory efficiency score too low"
    end
  end

  describe "animation performance" do
    test ~c"animation performance is smooth" do
      animation_results = Animation.benchmark_animation_performance()

      # Example assertions
      assert animation_results.maximum_fps > 30,
             "Maximum FPS too low for animation"

      assert animation_results.frame_time_consistency_ms < 5,
             "Animation jitter too high"

      assert animation_results.dropped_frames_percent < 1,
             "Animation frames dropped percentage too high"
    end
  end

  describe "full benchmark suite" do
    test ~c"full benchmark suite against baseline" do
      # Run all benchmarks with detailed output
      results = Performance.run_all(detailed: true)

      # Generate report
      report = Reporting.generate_report(results)
      IO.puts("\n--- Full Benchmark Report ---")
      IO.puts(Jason.encode!(report, pretty: true))
      IO.puts("---------------------------")

      # Load baseline results (example)
      # baseline = Reporting.load_baseline("path/to/baseline.json")

      # Compare results to baseline
      # {comparison_report, regressions_found} = Reporting.compare_to_baseline(results, baseline)
      # IO.puts(comparison_report)

      # Assert no significant regressions
      # refute regressions_found, "Significant performance regressions detected"
      # Placeholder until baseline comparison is implemented
      assert true
    end
  end
end
