package appg

import "time"

const (
	defaultShortRecommendRequestTimeout = 3 * time.Second
	defaultShortRecommendKeyTTLHours    = 72
)

// ShortRecommendConfig 控制App侧短视频环形队列读取行为。
// Enabled 使用指针是为了兼容旧配置：未配置时默认启用。
type ShortRecommendConfig struct {
	Enabled          *bool `json:"enabled"`
	RequestTimeoutMs int   `json:"requestTimeoutMs"`
	MaxBatches       int   `json:"maxBatches"`
	ScanMultiplier   int   `json:"scanMultiplier"`
	KeyTTLHours      int   `json:"keyTTLHours"`
}

func (c *GlobalConfig) ShortRecommendEnabled() bool {
	return c == nil || c.ShortRecommend.Enabled == nil || *c.ShortRecommend.Enabled
}

func (c *GlobalConfig) ShortRecommendRequestTimeout() time.Duration {
	if c == nil || c.ShortRecommend.RequestTimeoutMs <= 0 {
		return defaultShortRecommendRequestTimeout
	}
	timeout := time.Duration(c.ShortRecommend.RequestTimeoutMs) * time.Millisecond
	if timeout < 100*time.Millisecond {
		return 100 * time.Millisecond
	}
	if timeout > 10*time.Second {
		return 10 * time.Second
	}
	return timeout
}

func (c *GlobalConfig) ShortRecommendKeyTTL() int {
	if c == nil || c.ShortRecommend.KeyTTLHours <= 0 {
		return defaultShortRecommendKeyTTLHours
	}
	return c.ShortRecommend.KeyTTLHours
}