from django.db import models

from core.models.base import UUIDPrimaryKeyModel


class LookupGroup(UUIDPrimaryKeyModel):
    module = models.CharField(
        max_length=50,
        verbose_name="所属模块",
        help_text="client / property",
    )
    key = models.CharField(
        max_length=100,
        verbose_name="分组 key",
        help_text="如 source / follow_purpose",
    )
    label_zh = models.CharField(
        max_length=50,
        verbose_name="分组中文名",
        help_text="界面显示名称，如「客源来源」",
    )
    description = models.TextField(
        blank=True,
        default="",
        verbose_name="分组说明",
        help_text="前端 tooltip 使用",
    )
    sort_order = models.SmallIntegerField(
        default=0,
        verbose_name="排序",
    )
    created_at = models.DateTimeField(
        auto_now_add=True,
        verbose_name="创建时间",
    )
    updated_at = models.DateTimeField(
        auto_now=True,
        verbose_name="更新时间",
    )

    class Meta:
        db_table = "lookup_groups"
        verbose_name = "查找组"
        verbose_name_plural = "查找组"
        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",
        verbose_name="所属分组",
    )
    value = models.CharField(
        max_length=100,
        verbose_name="存储值",
        help_text="英文 snake_case，如 door_to_door；写入后只读",
    )
    label_zh = models.CharField(
        max_length=50,
        verbose_name="显示文本",
        help_text="如「上门」",
    )
    is_system = models.BooleanField(
        default=False,
        verbose_name="是否系统预制",
        help_text="True=系统预制不可物理删除，仅可停用",
    )
    is_active = models.BooleanField(
        default=True,
        verbose_name="是否启用",
        help_text="False 后录入下拉不展示，历史记录保留并展示「（已停用）」后缀",
    )
    sort_order = models.SmallIntegerField(
        default=0,
        verbose_name="排序",
    )
    created_by = models.ForeignKey(
        "org.Staff",
        null=True,
        blank=True,
        on_delete=models.SET_NULL,
        related_name="created_lookup_items",
        verbose_name="创建人",
        help_text="系统预制时为 NULL",
    )
    created_at = models.DateTimeField(
        auto_now_add=True,
        verbose_name="创建时间",
    )
    updated_at = models.DateTimeField(
        auto_now=True,
        verbose_name="更新时间",
    )

    class Meta:
        db_table = "lookup_items"
        verbose_name = "查找项"
        verbose_name_plural = "查找项"
        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",
            ),
        ]