from django.db import models
from django.conf import settings


class ToolCategory(models.Model):
    name = models.CharField(
        max_length=50,
        unique=True,
        verbose_name='分类名称'
    )
    icon = models.CharField(
        max_length=100,
        default='AppstoreOutlined',
        verbose_name='图标名称'
    )
    sort_order = models.IntegerField(
        default=0,
        verbose_name='排序'
    )
    created_at = models.DateTimeField(
        auto_now_add=True,
        verbose_name='创建时间'
    )

    class Meta:
        ordering = ['sort_order', '-created_at']
        verbose_name = '工具分类'
        verbose_name_plural = '工具分类'

    def __str__(self):
        return self.name


class Tool(models.Model):
    name = models.CharField(
        max_length=100,
        verbose_name='工具名称'
    )
    description = models.TextField(
        default='',
        blank=True,
        verbose_name='工具描述'
    )
    icon = models.CharField(
        max_length=100,
        default='ToolOutlined',
        verbose_name='图标名称'
    )
    url_path = models.CharField(
        max_length=200,
        unique=True,
        verbose_name='路由路径'
    )
    category = models.ForeignKey(
        ToolCategory,
        on_delete=models.SET_NULL,
        null=True,
        blank=True,
        related_name='tools',
        verbose_name='所属分类'
    )
    is_enabled = models.BooleanField(
        default=True,
        verbose_name='是否启用'
    )
    is_new = models.BooleanField(
        default=False,
        verbose_name='是否为新工具'
    )
    color = models.CharField(
        max_length=20,
        default='#667eea',
        blank=True,
        verbose_name='主题颜色'
    )
    usage_count = models.IntegerField(
        default=0,
        verbose_name='使用次数'
    )
    sort_order = models.IntegerField(
        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:
        ordering = ['sort_order', '-created_at']
        verbose_name = '工具'
        verbose_name_plural = '工具'

    def __str__(self):
        return self.name


class ToolFavorite(models.Model):
    user = models.ForeignKey(
        settings.AUTH_USER_MODEL,
        on_delete=models.CASCADE,
        related_name='tool_favorites',
        verbose_name='用户'
    )
    tool = models.ForeignKey(
        Tool,
        on_delete=models.CASCADE,
        related_name='tool_favorites',
        verbose_name='工具'
    )
    created_at = models.DateTimeField(
        auto_now_add=True,
        verbose_name='创建时间'
    )

    class Meta:
        verbose_name = '工具收藏'
        verbose_name_plural = '工具收藏'
        unique_together = ['user', 'tool']
        ordering = ['-created_at']

    def __str__(self):
        return f'{self.user} favorites {self.tool}'


class CompressionHistory(models.Model):
    COMPRESSION_MODE_CHOICES = [
        ('lossy', '有损压缩'),
        ('lossless', '无损优化'),
    ]

    user = models.ForeignKey(
        settings.AUTH_USER_MODEL,
        on_delete=models.CASCADE,
        null=True,
        blank=True,
        verbose_name='用户'
    )
    session_id = models.CharField(
        max_length=64,
        null=True,
        blank=True,
        verbose_name='会话ID'
    )
    original_filename = models.CharField(
        max_length=255,
        verbose_name='原始文件名'
    )
    original_size = models.BigIntegerField(
        verbose_name='原始大小(字节)'
    )
    compressed_size = models.BigIntegerField(
        verbose_name='压缩后大小(字节)'
    )
    compression_ratio = models.FloatField(
        verbose_name='压缩率'
    )
    original_format = models.CharField(
        max_length=10,
        verbose_name='原始格式'
    )
    output_format = models.CharField(
        max_length=10,
        verbose_name='输出格式'
    )
    compression_mode = models.CharField(
        max_length=10,
        choices=COMPRESSION_MODE_CHOICES,
        verbose_name='压缩模式'
    )
    quality = models.IntegerField(
        null=True,
        blank=True,
        verbose_name='压缩质量'
    )
    created_at = models.DateTimeField(
        auto_now_add=True,
        verbose_name='创建时间'
    )
    file_path = models.CharField(
        max_length=500,
        verbose_name='文件路径'
    )

    class Meta:
        ordering = ['-created_at']
        verbose_name = '压缩历史'
        verbose_name_plural = '压缩历史'

    def __str__(self):
        return f"{self.original_filename} - {self.compression_ratio:.1f}%"


class ColorHistory(models.Model):
    user = models.ForeignKey(
        settings.AUTH_USER_MODEL,
        on_delete=models.CASCADE,
        related_name='color_histories',
        verbose_name='用户'
    )
    color = models.CharField(
        max_length=7,
        verbose_name='颜色值(HEX)'
    )
    created_at = models.DateTimeField(
        auto_now_add=True,
        verbose_name='创建时间'
    )

    class Meta:
        ordering = ['-created_at']
        verbose_name = '颜色历史'
        verbose_name_plural = '颜色历史'

    def __str__(self):
        return f'{self.user} - {self.color}'