"""
員工管理 API 測試 (6.2)
測試 /api/v1/employees/ 的 CRUD 操作
"""
import datetime
import pytest


class TestEmployeeListAPI:
    """員工列表 API 測試"""

    def test_get_employees_empty(self, client):
        """空資料庫回傳空列表"""
        response = client.get("/api/v1/employees/")
        assert response.status_code == 200
        data = response.json()
        assert data["total"] == 0
        assert data["items"] == []

    def test_get_employees_with_data(self, client, sample_employee):
        """有資料時回傳員工列表"""
        response = client.get("/api/v1/employees/")
        assert response.status_code == 200
        data = response.json()
        assert data["total"] == 1
        assert len(data["items"]) == 1
        assert data["items"][0]["employee_id"] == "EMP001"

    def test_get_employees_pagination(self, client, db, sample_business_unit):
        """分頁功能測試"""
        from app.models.employee import Employee
        # 建立 5 個員工
        for i in range(5):
            emp = Employee(
                tenant_id=1,
                employee_id=f"EMP00{i+1}",
                username_base=f"user{i+1}",
                legal_name=f"員工{i+1}",
                hire_date=datetime.date.today(),
                status="active",
            )
            db.add(emp)
        db.commit()

        # 取第 1 頁，每頁 2 筆
        response = client.get("/api/v1/employees/?page=1&page_size=2")
        assert response.status_code == 200
        data = response.json()
        assert data["total"] == 5
        assert len(data["items"]) == 2
        assert data["total_pages"] == 3


class TestEmployeeCreateAPI:
    """員工建立 API 測試"""

    def test_create_employee_success(self, client, sample_business_unit):
        """成功建立員工"""
        payload = {
            "username_base": "porsche.chen",
            "legal_name": "陳保時",
            "english_name": "Porsche Chen",
            "hire_date": str(datetime.date.today()),
            "business_unit_id": sample_business_unit.id,
            "job_title": "軟體工程師",
            "job_level": "Mid",
            "email_quota_mb": 5120,
        }
        response = client.post("/api/v1/employees/", json=payload)
        assert response.status_code == 201
        data = response.json()
        assert data["username_base"] == "porsche.chen"
        assert data["legal_name"] == "陳保時"
        assert data["status"] == "active"
        assert "employee_id" in data  # 自動產生

    def test_create_employee_duplicate_username(self, client, sample_employee, sample_business_unit):
        """重複帳號名稱應回傳 400"""
        payload = {
            "username_base": "test.user",  # 與 sample_employee 相同
            "legal_name": "另一個用戶",
            "hire_date": str(datetime.date.today()),
            "business_unit_id": sample_business_unit.id,
            "job_title": "工程師",
            "job_level": "Junior",
            "email_quota_mb": 1024,
        }
        response = client.post("/api/v1/employees/", json=payload)
        assert response.status_code in [400, 409, 422]

    def test_create_employee_missing_required_fields(self, client):
        """缺少必填欄位應回傳 422"""
        response = client.post("/api/v1/employees/", json={"username_base": "only.this"})
        assert response.status_code == 422


class TestEmployeeDetailAPI:
    """員工詳情 API 測試"""

    def test_get_employee_success(self, client, sample_employee):
        """成功取得員工詳情"""
        response = client.get(f"/api/v1/employees/{sample_employee.id}")
        assert response.status_code == 200
        data = response.json()
        assert data["id"] == sample_employee.id
        assert data["employee_id"] == "EMP001"

    def test_get_employee_not_found(self, client):
        """不存在的員工 ID 應回傳 404"""
        response = client.get("/api/v1/employees/99999")
        assert response.status_code == 404

    def test_update_employee_success(self, client, sample_employee):
        """成功更新員工資料"""
        payload = {"legal_name": "更新後姓名", "phone": "02-12345678"}
        response = client.put(f"/api/v1/employees/{sample_employee.id}", json=payload)
        assert response.status_code == 200
        data = response.json()
        assert data["legal_name"] == "更新後姓名"
        assert data["phone"] == "02-12345678"

    def test_delete_employee_success(self, client, sample_employee):
        """成功刪除 (停用) 員工"""
        response = client.delete(f"/api/v1/employees/{sample_employee.id}")
        assert response.status_code == 200


class TestEmployeeSearchAPI:
    """員工搜尋 API 測試"""

    def test_search_by_name(self, client, sample_employee):
        """依姓名搜尋"""
        response = client.get("/api/v1/employees/?search=測試")
        assert response.status_code == 200
        data = response.json()
        assert data["total"] >= 1

    def test_filter_by_status(self, client, sample_employee):
        """依狀態篩選"""
        response = client.get("/api/v1/employees/?status=active")
        assert response.status_code == 200
        data = response.json()
        assert all(item["status"] == "active" for item in data["items"])