"""
BenchmarkDialog 的單元測試。

測試策略：
- PyQt5 在 CI 環境中不可用，透過 conftest.py 的 Stub 注入繞過 import。
- 測試驗證 BenchmarkDialog 的行為邏輯：
  - 對話框可正常建立
  - pipeline_config 為空時開始按鈕被禁用
  - show_result 正確顯示加速倍數文字
  - update_progress 更新進度條值
"""
import pytest
from unittest.mock import MagicMock


# ---------------------------------------------------------------------------
# 測試：BenchmarkDialog 可以建立
# ---------------------------------------------------------------------------

class TestBenchmarkDialogInit:
    def should_be_importable(self):
        """BenchmarkDialog 模組應可匯入（即使 PyQt5 被 Stub）。"""
        from ui.dialogs.benchmark_dialog import BenchmarkDialog
        assert BenchmarkDialog is not None

    def should_instantiate_with_valid_config(self):
        """提供非空 pipeline_config 時，BenchmarkDialog 應可正常建立。"""
        from ui.dialogs.benchmark_dialog import BenchmarkDialog
        stage_config = MagicMock()
        dialog = BenchmarkDialog(parent=None, pipeline_config=[stage_config])
        assert dialog is not None

    def should_instantiate_with_empty_config(self):
        """pipeline_config 為空時，BenchmarkDialog 應可建立（不應拋出例外）。"""
        from ui.dialogs.benchmark_dialog import BenchmarkDialog
        dialog = BenchmarkDialog(parent=None, pipeline_config=[])
        assert dialog is not None


# ---------------------------------------------------------------------------
# 測試：pipeline_config 為空時禁用開始按鈕
# ---------------------------------------------------------------------------

class TestStartButtonDisabledWhenEmptyConfig:
    def should_disable_start_button_when_pipeline_config_is_empty(self):
        """pipeline_config 為空時，start_button 應被禁用。"""
        from ui.dialogs.benchmark_dialog import BenchmarkDialog
        dialog = BenchmarkDialog(parent=None, pipeline_config=[])
        assert dialog.start_button.isEnabled() is False

    def should_enable_start_button_when_pipeline_config_has_stages(self):
        """pipeline_config 有 Stage 時，start_button 應為啟用狀態。"""
        from ui.dialogs.benchmark_dialog import BenchmarkDialog
        stage_config = MagicMock()
        dialog = BenchmarkDialog(parent=None, pipeline_config=[stage_config])
        assert dialog.start_button.isEnabled() is True

    def should_show_info_label_when_pipeline_config_is_empty(self):
        """pipeline_config 為空時，應有提示訊息 label 顯示。"""
        from ui.dialogs.benchmark_dialog import BenchmarkDialog
        dialog = BenchmarkDialog(parent=None, pipeline_config=[])
        assert hasattr(dialog, "info_label")


# ---------------------------------------------------------------------------
# 測試：show_result 顯示加速倍數
# ---------------------------------------------------------------------------

class TestShowResult:
    def should_display_speedup_text_with_x_suffix(self):
        """show_result 後，speedup_label 的文字應包含倍數數值與 'x'。"""
        from ui.dialogs.benchmark_dialog import BenchmarkDialog
        stage = MagicMock()
        dialog = BenchmarkDialog(parent=None, pipeline_config=[stage])
        seq_result = MagicMock()
        par_result = MagicMock()
        dialog.show_result(seq_result, par_result, speedup=3.2)
        call_arg = dialog.speedup_label.setText.call_args[0][0]
        assert "3.2" in call_arg
        assert "x" in call_arg.lower() or "X" in call_arg

    def should_display_faster_in_speedup_text(self):
        """show_result 後，speedup_label 文字應包含 'FASTER' 或 'faster'。"""
        from ui.dialogs.benchmark_dialog import BenchmarkDialog
        stage = MagicMock()
        dialog = BenchmarkDialog(parent=None, pipeline_config=[stage])
        seq_result = MagicMock()
        par_result = MagicMock()
        dialog.show_result(seq_result, par_result, speedup=2.5)
        call_arg = dialog.speedup_label.setText.call_args[0][0]
        assert "FASTER" in call_arg or "faster" in call_arg

    def should_store_seq_result(self):
        """show_result 後，seq_result 應儲存在 dialog 上。"""
        from ui.dialogs.benchmark_dialog import BenchmarkDialog
        stage = MagicMock()
        dialog = BenchmarkDialog(parent=None, pipeline_config=[stage])
        seq_result = MagicMock()
        par_result = MagicMock()
        dialog.show_result(seq_result, par_result, speedup=1.8)
        assert dialog.seq_result is seq_result

    def should_store_par_result(self):
        """show_result 後，par_result 應儲存在 dialog 上。"""
        from ui.dialogs.benchmark_dialog import BenchmarkDialog
        stage = MagicMock()
        dialog = BenchmarkDialog(parent=None, pipeline_config=[stage])
        seq_result = MagicMock()
        par_result = MagicMock()
        dialog.show_result(seq_result, par_result, speedup=1.8)
        assert dialog.par_result is par_result


# ---------------------------------------------------------------------------
# 測試：update_progress 更新進度條
# ---------------------------------------------------------------------------

class TestUpdateProgress:
    def should_update_progress_bar_value(self):
        """update_progress 應將進度條值更新為傳入的 value。"""
        from ui.dialogs.benchmark_dialog import BenchmarkDialog
        stage = MagicMock()
        dialog = BenchmarkDialog(parent=None, pipeline_config=[stage])
        dialog.progress_bar.setValue.reset_mock()
        dialog.update_progress("warmup", 42)
        dialog.progress_bar.setValue.assert_called_once_with(42)

    def should_store_current_phase(self):
        """update_progress 應儲存當前 phase 名稱。"""
        from ui.dialogs.benchmark_dialog import BenchmarkDialog
        stage = MagicMock()
        dialog = BenchmarkDialog(parent=None, pipeline_config=[stage])
        dialog.update_progress("sequential", 70)
        assert dialog.current_phase == "sequential"