"""
HRM ORM Models - Infrastructure Layer.

مدل‌های Django ORM ماژول منابع انسانی.
تمام جداول با پیشوند hrm_ هستند.
verbose_name‌ها به فارسی.
"""
import uuid

from django.conf import settings
from django.db import models
from django.utils.translation import gettext_lazy as _
from apps.core.tenant.models import TenantAwareModel


# ═══════════════════════════════════════════════
# 1️⃣ Organization Structure Models
# ═══════════════════════════════════════════════

class LegalEntityModel(TenantAwareModel):
    """مدل ORM - شخصیت حقوقی."""

    class EntityType(models.TextChoices):
        COMPANY = "COMPANY", _("شرکت")
        BRANCH = "BRANCH", _("شعبه")
        REPRESENTATIVE = "REPRESENTATIVE", _("نمایندگی")

    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    name = models.CharField(_("نام"), max_length=255)
    name_en = models.CharField(_("نام انگلیسی"), max_length=255, blank=True)
    registration_number = models.CharField(
        _("شماره ثبت"), max_length=50, db_index=True
    )
    national_id = models.CharField(
        _("شناسه ملی"), max_length=20, db_index=True
    )
    economic_code = models.CharField(
        _("کد اقتصادی"), max_length=20, blank=True
    )
    registration_date = models.DateField(_("تاریخ ثبت"), null=True, blank=True)
    entity_type = models.CharField(
        _("نوع"),
        max_length=20,
        choices=EntityType.choices,
        default=EntityType.COMPANY,
    )
    parent_entity = models.ForeignKey(
        "self",
        on_delete=models.SET_NULL,
        null=True,
        blank=True,
        related_name="children",
        verbose_name=_("شخصیت حقوقی مادر"),
    )
    address = models.TextField(_("آدرس"), blank=True)
    phone = models.CharField(_("تلفن"), max_length=50, blank=True)
    fax = models.CharField(_("فکس"), max_length=50, blank=True)
    email = models.EmailField(_("ایمیل"), blank=True)
    website = models.URLField(_("وبسایت"), blank=True)
    postal_code = models.CharField(_("کد پستی"), max_length=20, blank=True)
    city = models.CharField(_("شهر"), max_length=100, blank=True)
    province = models.CharField(_("استان"), max_length=100, blank=True)
    country = models.CharField(
        _("کشور"), max_length=5, default="IR"
    )
    is_active = models.BooleanField(_("فعال"), default=True, db_index=True)
    metadata = models.JSONField(_("متادیتا"), default=dict, blank=True)
    created_at = models.DateTimeField(_("تاریخ ایجاد"), auto_now_add=True)
    updated_at = models.DateTimeField(_("تاریخ بروزرسانی"), auto_now=True)
    created_by = models.UUIDField(_("ایجاد توسط"), null=True, blank=True)
    updated_by = models.UUIDField(_("بروزرسانی توسط"), null=True, blank=True)

    class Meta:
        app_label = "hrm"
        db_table = "hrm_legal_entity"
        verbose_name = _("شخصیت حقوقی")
        verbose_name_plural = _("شخصیت‌های حقوقی")
        unique_together = [["tenant", "national_id"]]
        indexes = [
            models.Index(fields=["tenant", "is_active"]),
            models.Index(fields=["tenant", "entity_type"]),
        ]

    def __str__(self):
        return self.name


class LocationModel(TenantAwareModel):
    """مدل ORM - مکان فیزیکی."""

    class LocationType(models.TextChoices):
        HEADQUARTERS = "HEADQUARTERS", _("دفتر مرکزی")
        OFFICE = "OFFICE", _("دفتر")
        FACTORY = "FACTORY", _("کارخانه")
        WAREHOUSE = "WAREHOUSE", _("انبار")
        BRANCH = "BRANCH", _("شعبه")
        REMOTE = "REMOTE", _("دورکاری")
        HYBRID = "HYBRID", _("ترکیبی")

    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    name = models.CharField(_("نام"), max_length=255)
    code = models.CharField(_("کد"), max_length=50)
    location_type = models.CharField(
        _("نوع مکان"),
        max_length=20,
        choices=LocationType.choices,
        default=LocationType.OFFICE,
    )
    legal_entity = models.ForeignKey(
        LegalEntityModel,
        on_delete=models.SET_NULL,
        null=True,
        blank=True,
        related_name="locations",
        verbose_name=_("شخصیت حقوقی"),
    )
    org_unit_id = models.UUIDField(
        _("واحد سازمانی"), null=True, blank=True
    )
    address = models.TextField(_("آدرس"), blank=True)
    city = models.CharField(_("شهر"), max_length=100, blank=True)
    province = models.CharField(_("استان"), max_length=100, blank=True)
    country = models.CharField(_("کشور"), max_length=5, default="IR")
    postal_code = models.CharField(_("کد پستی"), max_length=20, blank=True)
    phone = models.CharField(_("تلفن"), max_length=50, blank=True)
    latitude = models.FloatField(_("عرض جغرافیایی"), null=True, blank=True)
    longitude = models.FloatField(_("طول جغرافیایی"), null=True, blank=True)
    capacity = models.PositiveIntegerField(_("ظرفیت"), default=0)
    timezone = models.CharField(
        _("منطقه زمانی"), max_length=50, default="Asia/Tehran"
    )
    is_active = models.BooleanField(_("فعال"), default=True, db_index=True)
    metadata = models.JSONField(_("متادیتا"), default=dict, blank=True)
    created_at = models.DateTimeField(_("تاریخ ایجاد"), auto_now_add=True)
    updated_at = models.DateTimeField(_("تاریخ بروزرسانی"), auto_now=True)

    class Meta:
        app_label = "hrm"
        db_table = "hrm_location"
        verbose_name = _("مکان")
        verbose_name_plural = _("مکان‌ها")
        unique_together = [["tenant", "code"]]
        indexes = [
            models.Index(fields=["tenant", "location_type"]),
            models.Index(fields=["tenant", "is_active"]),
        ]

    def __str__(self):
        return f"{self.name} ({self.code})"


# ═══════════════════════════════════════════════
# 2️⃣ Employee Master Data Models
# ═══════════════════════════════════════════════

class EmployeeModel(TenantAwareModel):
    """مدل ORM - کارمند."""

    class EmploymentStatus(models.TextChoices):
        ACTIVE = "ACTIVE", _("فعال")
        ON_LEAVE = "ON_LEAVE", _("در مرخصی")
        SUSPENDED = "SUSPENDED", _("تعلیق")
        TERMINATED = "TERMINATED", _("خاتمه‌یافته")
        RETIRED = "RETIRED", _("بازنشسته")
        PROBATION = "PROBATION", _("آزمایشی")

    class EmploymentType(models.TextChoices):
        FULL_TIME = "FULL_TIME", _("تمام‌وقت")
        PART_TIME = "PART_TIME", _("پاره‌وقت")
        CONTRACT = "CONTRACT", _("قراردادی")
        INTERN = "INTERN", _("کارآموز")

    class GenderChoices(models.TextChoices):
        MALE = "MALE", _("مرد")
        FEMALE = "FEMALE", _("زن")

    class MaritalChoices(models.TextChoices):
        SINGLE = "SINGLE", _("مجرد")
        MARRIED = "MARRIED", _("متأهل")
        DIVORCED = "DIVORCED", _("مطلقه")
        WIDOWED = "WIDOWED", _("بیوه")

    class MilitaryChoices(models.TextChoices):
        COMPLETED = "COMPLETED", _("پایان خدمت")
        EXEMPT = "EXEMPT", _("معاف")
        EDUCATIONAL_EXEMPT = "EDUCATIONAL_EXEMPT", _("معاف تحصیلی")
        ACTIVE = "ACTIVE", _("در حال خدمت")
        NOT_APPLICABLE = "NOT_APPLICABLE", _("شامل نمی‌شود")

    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)

    # اطلاعات شخصی
    employee_code = models.CharField(
        _("کد پرسنلی"), max_length=50, db_index=True
    )
    first_name = models.CharField(_("نام"), max_length=100)
    last_name = models.CharField(_("نام خانوادگی"), max_length=100)
    first_name_en = models.CharField(
        _("نام انگلیسی"), max_length=100, blank=True
    )
    last_name_en = models.CharField(
        _("نام خانوادگی انگلیسی"), max_length=100, blank=True
    )
    national_code = models.CharField(
        _("کد ملی"), max_length=10, db_index=True
    )
    birth_certificate_number = models.CharField(
        _("شماره شناسنامه"), max_length=20, blank=True
    )
    date_of_birth = models.DateField(_("تاریخ تولد"), null=True, blank=True)
    gender = models.CharField(
        _("جنسیت"),
        max_length=10,
        choices=GenderChoices.choices,
        default=GenderChoices.MALE,
    )
    marital_status = models.CharField(
        _("وضعیت تأهل"),
        max_length=15,
        choices=MaritalChoices.choices,
        default=MaritalChoices.SINGLE,
    )
    military_status = models.CharField(
        _("وضعیت نظام وظیفه"),
        max_length=25,
        choices=MilitaryChoices.choices,
        default=MilitaryChoices.NOT_APPLICABLE,
    )
    nationality = models.CharField(
        _("ملیت"), max_length=5, default="IR"
    )

    # اطلاعات تماس
    phone = models.CharField(_("تلفن"), max_length=20, blank=True)
    mobile = models.CharField(_("موبایل"), max_length=20, blank=True)
    email = models.EmailField(_("ایمیل"), blank=True)
    address = models.TextField(_("آدرس"), blank=True)
    postal_code = models.CharField(_("کد پستی"), max_length=20, blank=True)
    city = models.CharField(_("شهر"), max_length=100, blank=True)
    province = models.CharField(_("استان"), max_length=100, blank=True)

    # تماس اضطراری
    emergency_contact_name = models.CharField(
        _("نام تماس اضطراری"), max_length=200, blank=True
    )
    emergency_contact_phone = models.CharField(
        _("تلفن تماس اضطراری"), max_length=20, blank=True
    )
    emergency_contact_relation = models.CharField(
        _("نسبت تماس اضطراری"), max_length=50, blank=True
    )

    # اطلاعات استخدامی
    user = models.OneToOneField(
        settings.AUTH_USER_MODEL,
        on_delete=models.SET_NULL,
        null=True,
        blank=True,
        related_name="hrm_employee",
        verbose_name=_("حساب کاربری"),
    )
    hire_date = models.DateField(_("تاریخ استخدام"), null=True, blank=True)
    termination_date = models.DateField(
        _("تاریخ خاتمه"), null=True, blank=True
    )
    employment_status = models.CharField(
        _("وضعیت استخدام"),
        max_length=15,
        choices=EmploymentStatus.choices,
        default=EmploymentStatus.PROBATION,
        db_index=True,
    )
    employment_type = models.CharField(
        _("نوع استخدام"),
        max_length=15,
        choices=EmploymentType.choices,
        default=EmploymentType.FULL_TIME,
    )
    probation_end_date = models.DateField(
        _("پایان دوره آزمایشی"), null=True, blank=True
    )

    # ارتباطات سازمانی
    legal_entity = models.ForeignKey(
        LegalEntityModel,
        on_delete=models.SET_NULL,
        null=True,
        blank=True,
        related_name="employees",
        verbose_name=_("شخصیت حقوقی"),
    )
    org_unit_id = models.UUIDField(
        _("واحد سازمانی"), null=True, blank=True, db_index=True
    )
    location = models.ForeignKey(
        LocationModel,
        on_delete=models.SET_NULL,
        null=True,
        blank=True,
        related_name="employees",
        verbose_name=_("مکان"),
    )
    primary_position = models.ForeignKey(
        "PositionModel",
        on_delete=models.SET_NULL,
        null=True,
        blank=True,
        related_name="incumbent_employees",
        verbose_name=_("پست سازمانی"),
    )
    manager = models.ForeignKey(
        "self",
        on_delete=models.SET_NULL,
        null=True,
        blank=True,
        related_name="direct_reports",
        verbose_name=_("مدیر مستقیم"),
    )

    # سیستم
    is_active = models.BooleanField(_("فعال"), default=True, db_index=True)
    metadata = models.JSONField(_("متادیتا"), default=dict, blank=True)
    created_at = models.DateTimeField(_("تاریخ ایجاد"), auto_now_add=True)
    updated_at = models.DateTimeField(_("تاریخ بروزرسانی"), auto_now=True)
    created_by = models.UUIDField(_("ایجاد توسط"), null=True, blank=True)
    updated_by = models.UUIDField(_("بروزرسانی توسط"), null=True, blank=True)

    class Meta:
        app_label = "hrm"
        db_table = "hrm_employee"
        verbose_name = _("کارمند")
        verbose_name_plural = _("کارمندان")
        unique_together = [
            ["tenant", "employee_code"],
            ["tenant", "national_code"],
        ]
        indexes = [
            models.Index(fields=["tenant", "employment_status"]),
            models.Index(fields=["tenant", "is_active"]),
            models.Index(fields=["tenant", "org_unit_id"]),
            models.Index(fields=["tenant", "legal_entity"]),
            models.Index(
                fields=["tenant", "last_name", "first_name"],
                name="hrm_emp_name_idx",
            ),
        ]

    def __str__(self):
        return f"{self.first_name} {self.last_name} ({self.employee_code})"

    @property
    def full_name(self):
        return f"{self.first_name} {self.last_name}".strip()


class EmploymentRecordModel(TenantAwareModel):
    """مدل ORM - سابقه استخدامی."""

    class ContractType(models.TextChoices):
        PERMANENT = "PERMANENT", _("دائم")
        TEMPORARY = "TEMPORARY", _("موقت")
        FIXED_TERM = "FIXED_TERM", _("مدت معین")
        PROJECT_BASED = "PROJECT_BASED", _("پروژه‌ای")
        INTERNSHIP = "INTERNSHIP", _("کارآموزی")
        CONSULTANCY = "CONSULTANCY", _("مشاوره‌ای")

    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    employee = models.ForeignKey(
        EmployeeModel,
        on_delete=models.CASCADE,
        related_name="employment_records",
        verbose_name=_("کارمند"),
    )
    contract_type = models.CharField(
        _("نوع قرارداد"),
        max_length=20,
        choices=ContractType.choices,
        default=ContractType.PERMANENT,
    )
    contract_number = models.CharField(
        _("شماره قرارداد"), max_length=50, blank=True
    )
    start_date = models.DateField(_("تاریخ شروع"))
    end_date = models.DateField(_("تاریخ پایان"), null=True, blank=True)
    title = models.CharField(_("عنوان"), max_length=255, blank=True)
    org_unit_id = models.UUIDField(
        _("واحد سازمانی"), null=True, blank=True
    )
    position = models.ForeignKey(
        "PositionModel",
        on_delete=models.SET_NULL,
        null=True,
        blank=True,
        verbose_name=_("پست"),
    )
    legal_entity = models.ForeignKey(
        LegalEntityModel,
        on_delete=models.SET_NULL,
        null=True,
        blank=True,
        verbose_name=_("شخصیت حقوقی"),
    )
    is_current = models.BooleanField(_("فعلی"), default=True, db_index=True)
    termination_reason = models.TextField(_("دلیل خاتمه"), blank=True)
    notes = models.TextField(_("یادداشت"), blank=True)
    metadata = models.JSONField(_("متادیتا"), default=dict, blank=True)
    created_at = models.DateTimeField(_("تاریخ ایجاد"), auto_now_add=True)
    updated_at = models.DateTimeField(_("تاریخ بروزرسانی"), auto_now=True)

    class Meta:
        app_label = "hrm"
        db_table = "hrm_employment_record"
        verbose_name = _("سابقه استخدامی")
        verbose_name_plural = _("سوابق استخدامی")
        ordering = ["-start_date"]
        indexes = [
            models.Index(fields=["tenant", "employee", "is_current"]),
        ]

    def __str__(self):
        return f"{self.employee} - {self.contract_type} ({self.start_date})"


class EmployeeDocumentModel(TenantAwareModel):
    """مدل ORM - مدارک کارمند."""

    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    employee = models.ForeignKey(
        EmployeeModel,
        on_delete=models.CASCADE,
        related_name="documents",
        verbose_name=_("کارمند"),
    )
    document_type = models.CharField(_("نوع مدرک"), max_length=50)
    title = models.CharField(_("عنوان"), max_length=255)
    document_number = models.CharField(
        _("شماره مدرک"), max_length=100, blank=True
    )
    issue_date = models.DateField(_("تاریخ صدور"), null=True, blank=True)
    expiry_date = models.DateField(_("تاریخ انقضا"), null=True, blank=True)
    file_path = models.FileField(
        _("فایل"), upload_to="hrm/documents/", blank=True
    )
    file_size = models.PositiveIntegerField(_("حجم فایل"), default=0)
    mime_type = models.CharField(_("نوع فایل"), max_length=100, blank=True)
    is_verified = models.BooleanField(_("تأیید شده"), default=False)
    verified_by = models.UUIDField(_("تأیید توسط"), null=True, blank=True)
    notes = models.TextField(_("یادداشت"), blank=True)
    metadata = models.JSONField(_("متادیتا"), default=dict, blank=True)
    created_at = models.DateTimeField(_("تاریخ ایجاد"), auto_now_add=True)
    updated_at = models.DateTimeField(_("تاریخ بروزرسانی"), auto_now=True)

    class Meta:
        app_label = "hrm"
        db_table = "hrm_employee_document"
        verbose_name = _("مدرک کارمند")
        verbose_name_plural = _("مدارک کارمندان")
        indexes = [
            models.Index(fields=["tenant", "employee", "document_type"]),
            models.Index(fields=["tenant", "expiry_date"]),
        ]

    def __str__(self):
        return f"{self.employee} - {self.title}"


# ═══════════════════════════════════════════════
# 3️⃣ Position & Job Models
# ═══════════════════════════════════════════════

class JobFamilyModel(TenantAwareModel):
    """مدل ORM - خانواده شغلی."""

    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    name = models.CharField(_("نام"), max_length=255)
    code = models.CharField(_("کد"), max_length=50)
    description = models.TextField(_("شرح"), blank=True)
    is_active = models.BooleanField(_("فعال"), default=True)
    created_at = models.DateTimeField(_("تاریخ ایجاد"), auto_now_add=True)
    updated_at = models.DateTimeField(_("تاریخ بروزرسانی"), auto_now=True)

    class Meta:
        app_label = "hrm"
        db_table = "hrm_job_family"
        verbose_name = _("خانواده شغلی")
        verbose_name_plural = _("خانواده‌های شغلی")
        unique_together = [["tenant", "code"]]

    def __str__(self):
        return self.name


class JobTitleModel(TenantAwareModel):
    """مدل ORM - عنوان شغلی."""

    class JobLevel(models.TextChoices):
        INTERN = "INTERN", _("کارآموز")
        JUNIOR = "JUNIOR", _("کارشناس مبتدی")
        MID = "MID", _("کارشناس")
        SENIOR = "SENIOR", _("کارشناس ارشد")
        LEAD = "LEAD", _("سرپرست")
        MANAGER = "MANAGER", _("مدیر")
        DIRECTOR = "DIRECTOR", _("مدیرکل")
        VP = "VP", _("معاون")
        C_LEVEL = "C_LEVEL", _("مدیر عامل")

    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    title = models.CharField(_("عنوان"), max_length=255)
    title_en = models.CharField(_("عنوان انگلیسی"), max_length=255, blank=True)
    code = models.CharField(_("کد"), max_length=50)
    job_family = models.ForeignKey(
        JobFamilyModel,
        on_delete=models.SET_NULL,
        null=True,
        blank=True,
        related_name="job_titles",
        verbose_name=_("خانواده شغلی"),
    )
    level = models.CharField(
        _("سطح"),
        max_length=15,
        choices=JobLevel.choices,
        default=JobLevel.MID,
    )
    grade = models.PositiveIntegerField(_("رتبه"), default=0)
    description = models.TextField(_("شرح شغل"), blank=True)
    responsibilities = models.TextField(_("مسئولیت‌ها"), blank=True)
    qualifications = models.TextField(_("شرایط احراز"), blank=True)
    min_experience_years = models.PositiveIntegerField(
        _("حداقل سابقه (سال)"), default=0
    )
    is_active = models.BooleanField(_("فعال"), default=True)
    metadata = models.JSONField(_("متادیتا"), default=dict, blank=True)
    created_at = models.DateTimeField(_("تاریخ ایجاد"), auto_now_add=True)
    updated_at = models.DateTimeField(_("تاریخ بروزرسانی"), auto_now=True)

    class Meta:
        app_label = "hrm"
        db_table = "hrm_job_title"
        verbose_name = _("عنوان شغلی")
        verbose_name_plural = _("عناوین شغلی")
        unique_together = [["tenant", "code"]]
        indexes = [
            models.Index(fields=["tenant", "level"]),
            models.Index(fields=["tenant", "job_family"]),
        ]

    def __str__(self):
        return f"{self.title} ({self.code})"


class PositionModel(TenantAwareModel):
    """مدل ORM - پست سازمانی."""

    class PositionStatus(models.TextChoices):
        ACTIVE = "ACTIVE", _("فعال")
        FROZEN = "FROZEN", _("منجمد")
        ABOLISHED = "ABOLISHED", _("حذف شده")

    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    title = models.CharField(_("عنوان"), max_length=255)
    code = models.CharField(_("کد"), max_length=50)
    job_title = models.ForeignKey(
        JobTitleModel,
        on_delete=models.SET_NULL,
        null=True,
        blank=True,
        related_name="positions",
        verbose_name=_("عنوان شغلی"),
    )
    org_unit_id = models.UUIDField(
        _("واحد سازمانی"), null=True, blank=True, db_index=True
    )
    legal_entity = models.ForeignKey(
        LegalEntityModel,
        on_delete=models.SET_NULL,
        null=True,
        blank=True,
        related_name="positions",
        verbose_name=_("شخصیت حقوقی"),
    )
    location = models.ForeignKey(
        LocationModel,
        on_delete=models.SET_NULL,
        null=True,
        blank=True,
        related_name="positions",
        verbose_name=_("مکان"),
    )
    reports_to = models.ForeignKey(
        "self",
        on_delete=models.SET_NULL,
        null=True,
        blank=True,
        related_name="subordinate_positions",
        verbose_name=_("گزارش‌دهی به"),
    )
    functional_reports_to = models.ForeignKey(
        "self",
        on_delete=models.SET_NULL,
        null=True,
        blank=True,
        related_name="functional_subordinates",
        verbose_name=_("گزارش‌دهی عملیاتی به"),
    )
    incumbent = models.ForeignKey(
        EmployeeModel,
        on_delete=models.SET_NULL,
        null=True,
        blank=True,
        related_name="held_positions",
        verbose_name=_("شاغل فعلی"),
    )
    status = models.CharField(
        _("وضعیت"),
        max_length=15,
        choices=PositionStatus.choices,
        default=PositionStatus.ACTIVE,
        db_index=True,
    )
    is_key_position = models.BooleanField(
        _("پست کلیدی"), default=False, db_index=True
    )
    is_budgeted = models.BooleanField(_("بودجه‌ای"), default=True)
    budget_amount = models.DecimalField(
        _("مبلغ بودجه"),
        max_digits=18,
        decimal_places=0,
        default=0,
    )
    headcount = models.PositiveIntegerField(_("تعداد نیرو"), default=1)
    fte = models.DecimalField(
        _("FTE"), max_digits=3, decimal_places=2, default=1.00
    )
    effective_date = models.DateField(
        _("تاریخ مؤثر"), null=True, blank=True
    )
    end_date = models.DateField(
        _("تاریخ پایان"), null=True, blank=True
    )
    metadata = models.JSONField(_("متادیتا"), default=dict, blank=True)
    created_at = models.DateTimeField(_("تاریخ ایجاد"), auto_now_add=True)
    updated_at = models.DateTimeField(_("تاریخ بروزرسانی"), auto_now=True)

    class Meta:
        app_label = "hrm"
        db_table = "hrm_position"
        verbose_name = _("پست سازمانی")
        verbose_name_plural = _("پست‌های سازمانی")
        unique_together = [["tenant", "code"]]
        indexes = [
            models.Index(fields=["tenant", "status"]),
            models.Index(fields=["tenant", "org_unit_id"]),
            models.Index(fields=["tenant", "is_key_position"]),
        ]

    def __str__(self):
        return f"{self.title} ({self.code})"

    @property
    def is_vacant(self):
        return self.incumbent is None


class ReportingLineModel(TenantAwareModel):
    """مدل ORM - خط گزارش‌دهی."""

    class ReportingType(models.TextChoices):
        DIRECT = "DIRECT", _("مستقیم")
        FUNCTIONAL = "FUNCTIONAL", _("عملیاتی")
        MATRIX = "MATRIX", _("ماتریسی")
        DOTTED = "DOTTED", _("نقطه‌چین")

    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    employee = models.ForeignKey(
        EmployeeModel,
        on_delete=models.CASCADE,
        related_name="reporting_lines",
        verbose_name=_("کارمند"),
    )
    manager = models.ForeignKey(
        EmployeeModel,
        on_delete=models.CASCADE,
        related_name="managed_reports",
        verbose_name=_("مدیر"),
    )
    reporting_type = models.CharField(
        _("نوع گزارش‌دهی"),
        max_length=15,
        choices=ReportingType.choices,
        default=ReportingType.DIRECT,
    )
    is_primary = models.BooleanField(_("اصلی"), default=True)
    effective_date = models.DateField(
        _("تاریخ مؤثر"), null=True, blank=True
    )
    end_date = models.DateField(
        _("تاریخ پایان"), null=True, blank=True
    )
    created_at = models.DateTimeField(_("تاریخ ایجاد"), auto_now_add=True)
    updated_at = models.DateTimeField(_("تاریخ بروزرسانی"), auto_now=True)

    class Meta:
        app_label = "hrm"
        db_table = "hrm_reporting_line"
        verbose_name = _("خط گزارش‌دهی")
        verbose_name_plural = _("خطوط گزارش‌دهی")
        indexes = [
            models.Index(fields=["tenant", "employee"]),
            models.Index(fields=["tenant", "manager"]),
        ]

    def __str__(self):
        return f"{self.employee} → {self.manager} ({self.reporting_type})"