from django.db import models

from core.enums import (
    FieldRuleEntityType,
    FieldRuleModule,
    FieldRuleRequirement,
    SettingValueType,
)
from core.models.base import UUIDPrimaryKeyModel

TRADE_STATUS_CHOICES = (
    ("sale", "出售"),
    ("rent", "出租"),
    ("sale_rent", "租售"),
    ("*", "全部"),
)


class TenantSetting(UUIDPrimaryKeyModel):
    category = models.CharField(
        max_length=50,
        verbose_name="配置分类",
        help_text="client / property / showroom",
    )
    key = models.CharField(
        max_length=100,
        verbose_name="配置 key",
        help_text="如 duplicate_check_scope",
    )
    value = models.JSONField(
        verbose_name="配置值",
        help_text='JSONB，统一格式 {"v": <value>}',
    )
    value_type = models.CharField(
        max_length=20,
        choices=SettingValueType.choices,
        verbose_name="值类型",
        help_text="bool / int / string / enum，用于前端渲染控件",
    )
    updated_by = models.ForeignKey(
        "org.Staff",
        null=True,
        blank=True,
        on_delete=models.SET_NULL,
        related_name="updated_tenant_settings",
        verbose_name="最后修改人",
    )
    updated_at = models.DateTimeField(
        auto_now=True,
        verbose_name="更新时间",
    )

    class Meta:
        db_table = "tenant_settings"
        verbose_name = "租户设置"
        verbose_name_plural = "租户设置"
        constraints = [
            models.UniqueConstraint(
                fields=["category", "key"], name="uq_tenant_settings_cat_key"
            ),
        ]
        indexes = [
            models.Index(fields=["category"], name="idx_tenant_settings_cat"),
        ]


class FieldRequirementRule(UUIDPrimaryKeyModel):
    module = models.CharField(
        max_length=20,
        choices=FieldRuleModule.choices,
        verbose_name="模块",
        help_text="property / client，MVP 仅 property",
    )
    entity_type = models.CharField(
        max_length=50,
        choices=FieldRuleEntityType.choices,
        verbose_name="实体类型",
        help_text="与 property.property_type 值域完全一致：residential/villa/commercial_residential/shop/office/other",
    )
    trade_status = models.CharField(
        max_length=20,
        choices=TRADE_STATUS_CHOICES,
        verbose_name="交易状态",
        help_text="sale=出售 / rent=出租 / sale_rent=租售 / *=全部（fallback 通配）",
    )
    field_key = models.CharField(
        max_length=50,
        verbose_name="字段 key",
        help_text="如 orientation / decoration / floor / building_area",
    )
    requirement = models.CharField(
        max_length=10,
        choices=FieldRuleRequirement.choices,
        verbose_name="规则",
        help_text="required=必填 / optional=选填 / hidden=隐藏",
    )
    updated_by = models.ForeignKey(
        "org.Staff",
        null=True,
        blank=True,
        on_delete=models.SET_NULL,
        related_name="updated_field_rules",
        verbose_name="最后修改人",
    )
    updated_at = models.DateTimeField(
        auto_now=True,
        verbose_name="更新时间",
    )

    class Meta:
        db_table = "field_requirement_rules"
        verbose_name = "字段必填规则"
        verbose_name_plural = "字段必填规则"
        constraints = [
            models.UniqueConstraint(
                fields=["module", "entity_type", "trade_status", "field_key"],
                name="uq_field_req_quad",
            ),
        ]
        indexes = [
            models.Index(
                fields=["module", "entity_type", "trade_status"],
                name="idx_field_req_lookup",
            ),
        ]