"""
測試資料工廠
"""
from datetime import date
from typing import Optional
from sqlalchemy.orm import Session

from app.core.security import get_password_hash
from app.models.department import Department
from app.models.employee import Employee
from app.models.kpi_period import KPIPeriod
from app.models.kpi_template import KPITemplate
from app.models.kpi_sheet import KPISheet
from app.models.kpi_item import KPIItem


class DepartmentFactory:
    """部門工廠"""

    _counter = 0

    @classmethod
    def create(
        cls,
        db: Session,
        code: Optional[str] = None,
        name: Optional[str] = None,
        level: str = "DEPT",
        parent_id: Optional[int] = None,
    ) -> Department:
        cls._counter += 1

        dept = Department(
            code=code or f"DEPT{cls._counter:03d}",
            name=name or f"測試部門{cls._counter}",
            level=level,
            parent_id=parent_id,
            is_active=True,
        )
        db.add(dept)
        db.flush()
        return dept


class EmployeeFactory:
    """員工工廠"""

    _counter = 0

    @classmethod
    def create(
        cls,
        db: Session,
        employee_no: Optional[str] = None,
        name: Optional[str] = None,
        department_id: Optional[int] = None,
        manager_id: Optional[int] = None,
        role: str = "employee",
        status: str = "active",
    ) -> Employee:
        cls._counter += 1

        # 如果沒有指定部門，建立一個
        if not department_id:
            dept = DepartmentFactory.create(db)
            department_id = dept.id

        employee = Employee(
            employee_no=employee_no or f"EMP{cls._counter:05d}",
            name=name or f"測試員工{cls._counter}",
            email=f"test{cls._counter}@example.com",
            password_hash=get_password_hash("password123"),
            department_id=department_id,
            manager_id=manager_id,
            job_title="工程師",
            status=status,
            role=role,
        )
        db.add(employee)
        db.flush()
        return employee


class KPIPeriodFactory:
    """KPI 期間工廠"""

    _counter = 0

    @classmethod
    def create(
        cls,
        db: Session,
        code: Optional[str] = None,
        status: str = "setting",
        year: int = 2024,
        half: int = 2,
    ) -> KPIPeriod:
        cls._counter += 1

        if half == 1:
            start = date(year, 1, 1)
            end = date(year, 6, 30)
            setting_end = date(year, 1, 14)
        else:
            start = date(year, 7, 1)
            end = date(year, 12, 31)
            setting_end = date(year, 7, 14)

        period = KPIPeriod(
            code=code or f"{year}H{half}_{cls._counter}",
            name=f"{year}年{'上' if half == 1 else '下'}半年",
            start_date=start,
            end_date=end,
            setting_start=start,
            setting_end=setting_end,
            status=status,
        )
        db.add(period)
        db.flush()
        return period


class KPITemplateFactory:
    """KPI 範本工廠"""

    _counter = 0

    @classmethod
    def create(
        cls,
        db: Session,
        code: Optional[str] = None,
        name: Optional[str] = None,
        category: str = "financial",
    ) -> KPITemplate:
        cls._counter += 1

        template = KPITemplate(
            code=code or f"TPL{cls._counter:03d}",
            name=name or f"測試 KPI 範本 {cls._counter}",
            category=category,
            default_weight=20,
            level0_desc="未達標",
            level1_desc="基本達成",
            level2_desc="達成目標",
            level3_desc="挑戰目標",
            level4_desc="超越目標",
            is_active=True,
        )
        db.add(template)
        db.flush()
        return template


class KPISheetFactory:
    """KPI 表單工廠"""

    @classmethod
    def create(
        cls,
        db: Session,
        employee: Optional[Employee] = None,
        period: Optional[KPIPeriod] = None,
        status: str = "draft",
        with_items: bool = True,
    ) -> KPISheet:
        if not employee:
            employee = EmployeeFactory.create(db)
        if not period:
            period = KPIPeriodFactory.create(db)

        sheet = KPISheet(
            employee_id=employee.id,
            period_id=period.id,
            department_id=employee.department_id,
            status=status,
        )
        db.add(sheet)
        db.flush()

        # 建立 KPI 項目（權重總和 100%）
        if with_items:
            weights = [30, 25, 25, 20]
            categories = ["financial", "customer", "internal", "learning"]

            for i, (weight, category) in enumerate(zip(weights, categories)):
                template = KPITemplateFactory.create(db, category=category)
                item = KPIItem(
                    sheet_id=sheet.id,
                    template_id=template.id,
                    sort_order=i,
                    name=f"KPI 項目 {i + 1}",
                    category=category,
                    weight=weight,
                    level0_criteria="未達標",
                    level1_criteria="基本達成",
                    level2_criteria="達成目標",
                    level3_criteria="挑戰目標",
                    level4_criteria="超越目標",
                )
                db.add(item)

        db.flush()
        return sheet