from django.db import models

from core.models.base import UUIDPrimaryKeyModel


class LookupGroup(UUIDPrimaryKeyModel):
    module = models.CharField(max_length=50)
    key = models.CharField(max_length=100)
    label_zh = models.CharField(max_length=50)
    description = models.TextField(blank=True, default="")
    sort_order = models.SmallIntegerField(default=0)
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    class Meta:
        db_table = "lookup_groups"
        constraints = [
            models.UniqueConstraint(
                fields=["module", "key"], name="uq_lookup_groups_module_key"
            ),
        ]


class LookupItem(UUIDPrimaryKeyModel):
    group = models.ForeignKey(
        LookupGroup, on_delete=models.CASCADE, related_name="items"
    )
    value = models.CharField(max_length=100)
    label_zh = models.CharField(max_length=50)
    is_system = models.BooleanField(default=False)
    is_active = models.BooleanField(default=True)
    sort_order = models.SmallIntegerField(default=0)
    created_by = models.ForeignKey(
        "org.Staff",
        null=True,
        blank=True,
        on_delete=models.SET_NULL,
        related_name="created_lookup_items",
    )
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    class Meta:
        db_table = "lookup_items"
        constraints = [
            models.UniqueConstraint(
                fields=["group", "value"], name="uq_lookup_items_group_value"
            ),
        ]
        indexes = [
            models.Index(
                fields=["group", "is_active", "sort_order"],
                name="idx_lookup_items_active",
            ),
        ]