from django.db import models

from core.enums import (
    PropertyAttachmentCategory,
    PropertyFieldSurveyStatus,
    PropertyPhotoCategory,
    PropertySurveyPhotoCategory,
)
from core.models.base import UUIDPrimaryKeyModel


class FieldSurvey(UUIDPrimaryKeyModel):
    property = models.ForeignKey(
        "fonrey_property.Property", on_delete=models.CASCADE, related_name="field_surveys"
    )
    status = models.CharField(
        max_length=10,
        choices=PropertyFieldSurveyStatus.choices,
        default=PropertyFieldSurveyStatus.DRAFT,
    )

    gps_latitude = models.DecimalField(max_digits=10, decimal_places=7, null=True, blank=True)
    gps_longitude = models.DecimalField(max_digits=10, decimal_places=7, null=True, blank=True)
    gps_accuracy = models.DecimalField(max_digits=6, decimal_places=2, null=True, blank=True)

    description = models.TextField(blank=True, default="")

    submitted_at = models.DateTimeField(null=True, blank=True)
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)
    created_by = models.ForeignKey("org.Staff", on_delete=models.RESTRICT)

    class Meta:
        db_table = "field_surveys"
        verbose_name = "实勘记录"
        verbose_name_plural = "实勘记录"
        indexes = [
            models.Index(fields=["property"], name="idx_fs_property"),
            models.Index(fields=["property", "status"], name="idx_fs_submitted"),
        ]


class SurveyPhoto(UUIDPrimaryKeyModel):
    survey = models.ForeignKey(FieldSurvey, on_delete=models.CASCADE, related_name="photos")
    category = models.CharField(max_length=20, choices=PropertySurveyPhotoCategory.choices)
    file_key = models.TextField()
    thumbnail_key = models.TextField(blank=True, default="")
    file_size = models.IntegerField(null=True, blank=True)
    width = models.IntegerField(null=True, blank=True)
    height = models.IntegerField(null=True, blank=True)
    sort_order = models.SmallIntegerField(default=0)
    is_vr_screenshot = models.BooleanField(default=False)
    created_at = models.DateTimeField(auto_now_add=True)

    class Meta:
        db_table = "survey_photos"
        verbose_name = "实勘照片"
        verbose_name_plural = "实勘照片"
        indexes = [
            models.Index(fields=["survey"], name="idx_sp_survey"),
            models.Index(fields=["survey", "category"], name="idx_sp_category"),
        ]


class PropertyPhoto(models.Model):
    """Partitioned table (PARTITION BY RANGE created_at).

    Managed via RunSQL; Django ORM treats parent as unmanaged.
    """

    id = models.UUIDField(primary_key=True)
    created_at = models.DateTimeField()
    property = models.ForeignKey(
        "fonrey_property.Property", on_delete=models.CASCADE, related_name="photos"
    )

    category = models.CharField(max_length=20, choices=PropertyPhotoCategory.choices)
    file_key = models.TextField()
    thumbnail_key = models.TextField(blank=True, default="")
    file_name = models.CharField(max_length=255, blank=True, default="")
    file_size = models.IntegerField(null=True, blank=True)
    width = models.IntegerField(null=True, blank=True)
    height = models.IntegerField(null=True, blank=True)

    is_cover = models.BooleanField(default=False)
    sort_order = models.SmallIntegerField(default=0)

    updated_at = models.DateTimeField(auto_now=True)
    created_by = models.ForeignKey(
        "org.Staff", null=True, blank=True, on_delete=models.SET_NULL
    )

    class Meta:
        db_table = "property_photos"
        verbose_name = "房源图片"
        verbose_name_plural = "房源图片"
        managed = False
        unique_together = (("id", "created_at"),)


class PropertyAttachment(UUIDPrimaryKeyModel):
    property = models.ForeignKey(
        "fonrey_property.Property", on_delete=models.CASCADE, related_name="attachments"
    )
    category = models.CharField(
        max_length=20,
        choices=PropertyAttachmentCategory.choices,
        default=PropertyAttachmentCategory.OTHER,
    )
    file_key = models.TextField()
    file_name = models.CharField(max_length=255)
    file_size = models.IntegerField()
    file_type = models.CharField(max_length=50, blank=True, default="")
    sort_order = models.SmallIntegerField(default=0)
    created_at = models.DateTimeField(auto_now_add=True)
    created_by = models.ForeignKey(
        "org.Staff", null=True, blank=True, on_delete=models.SET_NULL
    )

    class Meta:
        db_table = "property_attachments"
        verbose_name = "房源附件"
        verbose_name_plural = "房源附件"
        indexes = [
            models.Index(fields=["property"], name="idx_pa_property"),
            models.Index(fields=["property", "category"], name="idx_pa_category"),
        ]


class PropertyTag(UUIDPrimaryKeyModel):
    name = models.CharField(max_length=50)
    color = models.CharField(max_length=7, blank=True, default="")
    is_system = models.BooleanField(default=False)
    sort_order = models.IntegerField(default=0)
    is_active = models.BooleanField(default=True)

    class Meta:
        db_table = "property_tags"
        verbose_name = "房源标签"
        verbose_name_plural = "房源标签"


class PropertyTagRelation(models.Model):
    property = models.ForeignKey(
        "fonrey_property.Property", on_delete=models.CASCADE, related_name="tag_relations"
    )
    tag = models.ForeignKey(
        PropertyTag, on_delete=models.CASCADE, related_name="property_relations"
    )

    class Meta:
        db_table = "property_tag_relations"
        verbose_name = "房源标签关联"
        verbose_name_plural = "房源标签关联"
        constraints = [
            models.UniqueConstraint(fields=["property", "tag"], name="uq_ptr_property_tag"),
        ]
        indexes = [
            models.Index(fields=["property"], name="idx_ptr_property"),
            models.Index(fields=["tag"], name="idx_ptr_tag"),
        ]


class PropertyFavorite(models.Model):
    staff = models.ForeignKey(
        "org.Staff", on_delete=models.CASCADE, related_name="favorite_properties"
    )
    property = models.ForeignKey(
        "fonrey_property.Property", on_delete=models.CASCADE, related_name="favorited_by"
    )
    created_at = models.DateTimeField(auto_now_add=True)

    class Meta:
        db_table = "property_favorites"
        verbose_name = "房源收藏"
        verbose_name_plural = "房源收藏"
        constraints = [
            models.UniqueConstraint(fields=["staff", "property"], name="uq_pfav_staff_property"),
        ]
        indexes = [models.Index(fields=["staff"], name="idx_pfav_staff")]