"""
Phase 19.6: Terminal Service Tests
==================================
Omni-Terminal SSE 架構測試

測試內容:
1. 意圖分類 (classify_intent)
2. Service 依賴注入
3. Model 驗證

@see ADR-031 Omni-Terminal SSE Architecture
@author Claude Code (首席架構師)
@version 1.0.0
@date 2026-03-28 (台北時間)
"""

import pytest

from src.models.terminal import (
    SpatialContext,
    TerminalIntentRequest,
    TerminalSession,
    TerminalSessionStatus,
)
from src.services.terminal_service import (
    IntentType,
    TerminalService,
    classify_intent,
    get_terminal_service,
)


# =============================================================================
# Intent Classification Tests
# =============================================================================

INTENT_CLASSIFICATION_TEST_CASES = [
    # 查詢類 - 狀態
    ("status", IntentType.QUERY_STATUS),
    ("狀態", IntentType.QUERY_STATUS),
    ("pod status", IntentType.QUERY_STATUS),
    ("健康狀態", IntentType.QUERY_STATUS),
    ("health check", IntentType.QUERY_STATUS),

    # 查詢類 - 指標
    ("metrics", IntentType.QUERY_METRICS),
    ("指標", IntentType.QUERY_METRICS),
    ("cpu usage", IntentType.QUERY_METRICS),
    ("記憶體使用量", IntentType.QUERY_METRICS),
    ("memory utilization", IntentType.QUERY_METRICS),

    # 查詢類 - 日誌
    ("logs", IntentType.QUERY_LOGS),
    ("日誌", IntentType.QUERY_LOGS),
    ("error logs", IntentType.QUERY_LOGS),
    ("錯誤訊息", IntentType.QUERY_LOGS),
    ("exception trace", IntentType.QUERY_LOGS),

    # 操作類 - 簽核
    ("approve", IntentType.ACTION_APPROVAL),
    ("簽核", IntentType.ACTION_APPROVAL),
    ("授權", IntentType.ACTION_APPROVAL),
    ("批准這個操作", IntentType.ACTION_APPROVAL),
    ("show pending approval", IntentType.ACTION_APPROVAL),

    # 操作類 - 重啟
    ("restart", IntentType.ACTION_RESTART),
    ("重啟", IntentType.ACTION_RESTART),
    ("rollout", IntentType.ACTION_RESTART),
    ("重新部署", IntentType.ACTION_RESTART),

    # 操作類 - 擴容
    ("scale", IntentType.ACTION_SCALE),
    ("擴容", IntentType.ACTION_SCALE),
    ("增加副本", IntentType.ACTION_SCALE),
    ("replica count", IntentType.ACTION_SCALE),

    # 分析類 - RCA
    ("rca", IntentType.ANALYZE_RCA),
    ("root cause", IntentType.ANALYZE_RCA),
    ("根因", IntentType.ANALYZE_RCA),
    ("分析問題", IntentType.ANALYZE_RCA),
    ("為什麼 API 變慢", IntentType.ANALYZE_RCA),
    ("why is it slow", IntentType.ANALYZE_RCA),

    # 分析類 - Incident
    ("incident", IntentType.ANALYZE_INCIDENT),
    ("事件", IntentType.ANALYZE_INCIDENT),
    ("alert 告警", IntentType.ANALYZE_INCIDENT),
    ("告警詳情", IntentType.ANALYZE_INCIDENT),

    # 一般
    ("hello", IntentType.GENERAL),
    ("你好", IntentType.GENERAL),
    ("help", IntentType.GENERAL),
    ("random text", IntentType.GENERAL),
]


@pytest.mark.parametrize("intent,expected_type", INTENT_CLASSIFICATION_TEST_CASES)
def test_classify_intent(intent: str, expected_type: IntentType):
    """測試意圖分類準確度"""
    result = classify_intent(intent)
    assert result == expected_type, f"Intent '{intent}' should be classified as {expected_type}, got {result}"


def test_classify_intent_case_insensitive():
    """測試意圖分類不區分大小寫"""
    assert classify_intent("STATUS") == IntentType.QUERY_STATUS
    assert classify_intent("Metrics") == IntentType.QUERY_METRICS
    assert classify_intent("RESTART") == IntentType.ACTION_RESTART


# =============================================================================
# Model Validation Tests
# =============================================================================


def test_spatial_context_required_fields():
    """測試 SpatialContext 必填欄位"""
    context = SpatialContext(current_page="/dashboard")
    assert context.current_page == "/dashboard"
    assert context.focused_entity_id is None  # 預設為 None


def test_spatial_context_with_entity():
    """測試 SpatialContext 帶實體 ID"""
    context = SpatialContext(
        current_page="/incidents",
        focused_entity_id="INC-001",
    )
    assert context.current_page == "/incidents"
    assert context.focused_entity_id == "INC-001"


def test_terminal_intent_request_validation():
    """測試 TerminalIntentRequest 驗證"""
    request = TerminalIntentRequest(
        intent="check system status",
        context=SpatialContext(current_page="/dashboard"),
    )
    assert request.intent == "check system status"
    assert request.context.current_page == "/dashboard"
    assert request.session_id is None  # 預設為 None


def test_terminal_intent_request_with_session():
    """測試帶 session_id 的 TerminalIntentRequest"""
    request = TerminalIntentRequest(
        intent="continue analysis",
        context=SpatialContext(current_page="/"),
        session_id="sess-001",
    )
    assert request.session_id == "sess-001"


def test_terminal_session_status_enum():
    """測試 TerminalSessionStatus 枚舉值"""
    assert TerminalSessionStatus.PENDING.value == "pending"
    assert TerminalSessionStatus.PROCESSING.value == "processing"
    assert TerminalSessionStatus.COMPLETED.value == "completed"
    assert TerminalSessionStatus.ERROR.value == "error"
    assert TerminalSessionStatus.ABORTED.value == "aborted"


# =============================================================================
# Dependency Injection Tests
# =============================================================================


@pytest.mark.asyncio
async def test_get_terminal_service():
    """測試 FastAPI 依賴注入函數"""
    service = await get_terminal_service()
    assert isinstance(service, TerminalService)


@pytest.mark.asyncio
async def test_get_terminal_service_creates_new_instance():
    """測試每次呼叫建立新實例 (非 Singleton)"""
    service1 = await get_terminal_service()
    service2 = await get_terminal_service()
    assert service1 is not service2, "Should create new instance each time"


# =============================================================================
# Service Unit Tests (No External Dependencies)
# =============================================================================


@pytest.mark.asyncio
async def test_terminal_service_instantiation():
    """測試 TerminalService 實例化"""
    service = TerminalService()
    assert service._sessions == {}
    assert service._tasks == {}


@pytest.mark.asyncio
async def test_get_session_not_found():
    """測試取得不存在的 Session"""
    service = TerminalService()
    session = await service.get_session("nonexistent-session")
    assert session is None


@pytest.mark.asyncio
async def test_abort_session_not_found():
    """測試中斷不存在的 Session"""
    service = TerminalService()
    result = await service.abort_session("nonexistent-session")
    assert result is False


# =============================================================================
# Intent Coverage Statistics
# =============================================================================


def test_intent_type_coverage():
    """確保所有 IntentType 都有測試案例"""
    tested_types = set(expected for _, expected in INTENT_CLASSIFICATION_TEST_CASES)
    all_types = set(IntentType)

    missing = all_types - tested_types
    assert not missing, f"Missing test cases for IntentType: {missing}"