# coding=utf-8
"""
应用 API 限流模型
存储应用的 API 调用限流配置
"""
import uuid_utils.compat as uuid
from django.db import models

from common.mixins.app_model_mixin import AppModelMixin


class RateLimitType(models.TextChoices):
    """限流类型"""
    QPS = 'QPS', '每秒请求数'
    QPM = 'QPM', '每分钟请求数'
    QPH = 'QPH', '每小时请求数'
    QPD = 'QPD', '每日请求数'


class RateLimit(AppModelMixin):
    """应用 API 限流配置"""
    id = models.UUIDField(primary_key=True, max_length=128, default=uuid.uuid7, editable=False, verbose_name="主键id")
    application = models.OneToOneField(
        'application.Application',
        on_delete=models.CASCADE,
        db_constraint=False,
        verbose_name="应用",
        db_index=True
    )
    is_enabled = models.BooleanField(verbose_name="是否启用限流", default=False)
    rate_type = models.CharField(
        max_length=10,
        choices=RateLimitType.choices,
        default=RateLimitType.QPM,
        verbose_name="限流类型"
    )
    max_requests = models.IntegerField(verbose_name="最大请求数", default=60)
    burst_size = models.IntegerField(verbose_name="突发容量", default=10)
    window_seconds = models.IntegerField(verbose_name="时间窗口(秒)", default=60)

    class Meta:
        db_table = "application_rate_limit"

    def __str__(self):
        return f"RateLimit({self.application_id}) - {self.rate_type}: {self.max_requests}"


class RateLimitLog(AppModelMixin):
    """限流日志"""
    id = models.UUIDField(primary_key=True, max_length=128, default=uuid.uuid7, editable=False, verbose_name="主键id")
    application = models.ForeignKey(
        'application.Application',
        on_delete=models.CASCADE,
        db_constraint=False,
        verbose_name="应用",
        db_index=True
    )
    client_ip = models.CharField(max_length=45, verbose_name="客户端IP", default="")
    request_path = models.CharField(max_length=512, verbose_name="请求路径", default="")
    is_limited = models.BooleanField(verbose_name="是否被限流", default=False)
    request_time = models.DateTimeField(verbose_name="请求时间", auto_now_add=True)

    class Meta:
        db_table = "application_rate_limit_log"
        ordering = ['-request_time']