from django.db import models

from core.enums import OrgUnitAttribute, OrgUnitType
from core.models.base import SoftDeleteModel


class OrgUnit(SoftDeleteModel):
    name = models.CharField(
        max_length=100,
        verbose_name="部门名称",
        help_text="部门/组织名称",
    )
    type = models.CharField(
        max_length=20,
        choices=OrgUnitType.choices,
        verbose_name="组织类型",
        help_text="company=公司 / division=事业部 / region=大区 / area=区域 / district=片区 / store=门店 / group=店组 / functional=职能",
    )
    parent = models.ForeignKey(
        "self",
        null=True,
        blank=True,
        on_delete=models.RESTRICT,
        related_name="children",
        db_index=True,
        verbose_name="父节点",
        help_text="父节点，根节点为 NULL",
    )
    path = models.TextField(
        verbose_name="物化路径",
        help_text='/root_id/.../self_id/，用于子树查询',
    )
    depth = models.SmallIntegerField(
        default=0,
        verbose_name="节点深度",
        help_text="根=0，最大支持 8 层",
    )
    sort_order = models.IntegerField(
        default=0,
        verbose_name="排序顺序",
        help_text="同级排序",
    )
    attribute = models.CharField(
        max_length=10,
        choices=OrgUnitAttribute.choices,
        null=True,
        blank=True,
        verbose_name="经营属性",
        help_text="direct=直营 / franchise=加盟",
    )
    address_city = models.CharField(
        max_length=50,
        blank=True,
        default="",
        verbose_name="所在城市",
    )
    address_district = models.CharField(
        max_length=50,
        blank=True,
        default="",
        verbose_name="所在县区",
    )
    address_detail = models.CharField(
        max_length=200,
        blank=True,
        default="",
        verbose_name="详细地址",
    )
    latitude = models.DecimalField(
        max_digits=10,
        decimal_places=7,
        null=True,
        blank=True,
        verbose_name="纬度",
        help_text="部门定位针 WGS84",
    )
    longitude = models.DecimalField(
        max_digits=10,
        decimal_places=7,
        null=True,
        blank=True,
        verbose_name="经度",
        help_text="部门定位针 WGS84",
    )
    manager = models.ForeignKey(
        "org.Staff",
        null=True,
        blank=True,
        on_delete=models.SET_NULL,
        related_name="managed_org_units",
        verbose_name="部门负责人",
        help_text="循环依赖，Application 层维护",
    )
    established_at = models.DateField(
        null=True,
        blank=True,
        verbose_name="成立时间",
    )
    phone = models.CharField(
        max_length=30,
        blank=True,
        default="",
        verbose_name="部门联系电话",
    )
    ext_start = models.IntegerField(
        null=True,
        blank=True,
        verbose_name="分机号起始",
    )
    ext_end = models.IntegerField(
        null=True,
        blank=True,
        verbose_name="分机号结束",
    )
    is_active = models.BooleanField(
        default=True,
        verbose_name="是否启用",
        help_text="FALSE=已关闭部门，仍可在筛选中显示",
    )

    class Meta:
        db_table = "org_units"
        verbose_name = "组织节点"
        verbose_name_plural = "组织节点"
        indexes = [
            models.Index(fields=["parent"], name="idx_org_units_parent"),
            models.Index(fields=["type"], name="idx_org_units_type"),
            models.Index(fields=["path"], name="idx_org_units_path"),
        ]
        ordering = ["sort_order", "name"]

    def __str__(self) -> str:
        return f"{self.name} ({self.type})"