from django.db import models
import uuid


class Project(models.Model):
    """项目配置模型"""
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    name = models.CharField(max_length=100)
    template_id = models.CharField(max_length=50, default='classic')
    card_width = models.IntegerField(default=750)
    card_height = models.IntegerField(default=1050)
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    # 导出设置
    export_resolution = models.CharField(max_length=20, default='standard')
    export_include_back = models.BooleanField(default=True)

    def __str__(self):
        return self.name

    class Meta:
        ordering = ['-updated_at']


class Asset(models.Model):
    """项目素材模型"""
    project = models.ForeignKey(Project, on_delete=models.CASCADE, related_name='assets')
    asset_type = models.CharField(max_length=20)  # 'suit_symbol', 'face_card', 'joker', 'back', 'border'
    asset_key = models.CharField(max_length=50)    # 如 'spade', 'heart-J', 'big_joker'
    file_path = models.CharField(max_length=255)   # 相对于media目录
    file_name = models.CharField(max_length=100)
    width = models.IntegerField(null=True)
    height = models.IntegerField(null=True)
    uploaded_at = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        return f"{self.asset_type}:{self.asset_key}"

    class Meta:
        ordering = ['-uploaded_at']


class CardLayer(models.Model):
    """牌面图层配置模型"""
    project = models.ForeignKey(Project, on_delete=models.CASCADE, related_name='layers')
    card_type = models.CharField(max_length=20)  # 'number', 'face', 'joker'
    card_key = models.CharField(max_length=30)   # 'spade-A', 'heart-K', 'big_joker'
    layer_name = models.CharField(max_length=50)
    layer_type = models.CharField(max_length=20)  # 'background', 'border', 'image', 'text'
    visible = models.BooleanField(default=True)
    locked = models.BooleanField(default=False)
    opacity = models.FloatField(default=1.0)
    z_index = models.IntegerField(default=0)

    # 图层属性（JSON存储）
    properties = models.JSONField(default=dict)

    def __str__(self):
        return f"{self.card_key}-{self.layer_name}"

    class Meta:
        ordering = ['card_key', 'z_index']