package ratio_setting

import (
    "sync"
    "sync/atomic"
    "time"

    "github.com/gin-gonic/gin"
)

const exposedDataTTL = 30 * time.Second

type exposedCache struct {
    data      gin.H
    expiresAt time.Time
}

var (
    exposedData atomic.Value
    rebuildMu   sync.Mutex
)

func InvalidateExposedDataCache() {
    exposedData.Store((*exposedCache)(nil))
}

func cloneGinH(src gin.H) gin.H {
    dst := make(gin.H, len(src))
    for k, v := range src {
        dst[k] = v
    }
    return dst
}

func GetExposedData() gin.H {
    if c, ok := exposedData.Load().(*exposedCache); ok && c != nil && time.Now().Before(c.expiresAt) {
        return cloneGinH(c.data)
    }
    rebuildMu.Lock()
    defer rebuildMu.Unlock()
    if c, ok := exposedData.Load().(*exposedCache); ok && c != nil && time.Now().Before(c.expiresAt) {
        return cloneGinH(c.data)
    }
    newData := gin.H{
        "model_ratio":      GetModelRatioCopy(),
        "completion_ratio": GetCompletionRatioCopy(),
        "cache_ratio":      GetCacheRatioCopy(),
        "model_price":      GetModelPriceCopy(),
    }
    exposedData.Store(&exposedCache{
        data:      newData,
        expiresAt: time.Now().Add(exposedDataTTL),
    })
    return cloneGinH(newData)
}