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import (
"encoding/json"
"net/http"
"strconv"
"strings"
"time"
"github.com/Wei-Shaw/sub2api/internal/pkg/response"
"github.com/Wei-Shaw/sub2api/internal/service"
"github.com/gin-gonic/gin"
"golang.org/x/sync/errgroup"
)
var opsDashboardSnapshotV2Cache = newSnapshotCache(30 * time.Second)
type opsDashboardSnapshotV2Response struct {
GeneratedAt string `json:"generated_at"`
Overview *service.OpsDashboardOverview `json:"overview"`
ThroughputTrend *service.OpsThroughputTrendResponse `json:"throughput_trend"`
ErrorTrend *service.OpsErrorTrendResponse `json:"error_trend"`
}
type opsDashboardSnapshotV2CacheKey struct {
StartTime string `json:"start_time"`
EndTime string `json:"end_time"`
Platform string `json:"platform"`
GroupID *int64 `json:"group_id"`
QueryMode service.OpsQueryMode `json:"mode"`
BucketSecond int `json:"bucket_second"`
}
// GetDashboardSnapshotV2 returns ops dashboard core snapshot in one request.
// GET /api/v1/admin/ops/dashboard/snapshot-v2
func (h *OpsHandler) GetDashboardSnapshotV2(c *gin.Context) {
if h.opsService == nil {
response.Error(c, http.StatusServiceUnavailable, "Ops service not available")
return
}
if err := h.opsService.RequireMonitoringEnabled(c.Request.Context()); err != nil {
response.ErrorFrom(c, err)
return
}
startTime, endTime, err := parseOpsTimeRange(c, "1h")
if err != nil {
response.BadRequest(c, err.Error())
return
}
filter := &service.OpsDashboardFilter{
StartTime: startTime,
EndTime: endTime,
Platform: strings.TrimSpace(c.Query("platform")),
QueryMode: parseOpsQueryMode(c),
}
if v := strings.TrimSpace(c.Query("group_id")); v != "" {
id, err := strconv.ParseInt(v, 10, 64)
if err != nil || id <= 0 {
response.BadRequest(c, "Invalid group_id")
return
}
filter.GroupID = &id
}
bucketSeconds := pickThroughputBucketSeconds(endTime.Sub(startTime))
keyRaw, _ := json.Marshal(opsDashboardSnapshotV2CacheKey{
StartTime: startTime.UTC().Format(time.RFC3339),
EndTime: endTime.UTC().Format(time.RFC3339),
Platform: filter.Platform,
GroupID: filter.GroupID,
QueryMode: filter.QueryMode,
BucketSecond: bucketSeconds,
})
cacheKey := string(keyRaw)
if cached, ok := opsDashboardSnapshotV2Cache.Get(cacheKey); ok {
if cached.ETag != "" {
c.Header("ETag", cached.ETag)
c.Header("Vary", "If-None-Match")
if ifNoneMatchMatched(c.GetHeader("If-None-Match"), cached.ETag) {
c.Status(http.StatusNotModified)
return
}
}
c.Header("X-Snapshot-Cache", "hit")
response.Success(c, cached.Payload)
return
}
var (
overview *service.OpsDashboardOverview
trend *service.OpsThroughputTrendResponse
errTrend *service.OpsErrorTrendResponse
)
g, gctx := errgroup.WithContext(c.Request.Context())
g.Go(func() error {
f := *filter
result, err := h.opsService.GetDashboardOverview(gctx, &f)
if err != nil {
return err
}
overview = result
return nil
})
g.Go(func() error {
f := *filter
result, err := h.opsService.GetThroughputTrend(gctx, &f, bucketSeconds)
if err != nil {
return err
}
trend = result
return nil
})
g.Go(func() error {
f := *filter
result, err := h.opsService.GetErrorTrend(gctx, &f, bucketSeconds)
if err != nil {
return err
}
errTrend = result
return nil
})
if err := g.Wait(); err != nil {
response.ErrorFrom(c, err)
return
}
resp := &opsDashboardSnapshotV2Response{
GeneratedAt: time.Now().UTC().Format(time.RFC3339),
Overview: overview,
ThroughputTrend: trend,
ErrorTrend: errTrend,
}
cached := opsDashboardSnapshotV2Cache.Set(cacheKey, resp)
if cached.ETag != "" {
c.Header("ETag", cached.ETag)
c.Header("Vary", "If-None-Match")
}
c.Header("X-Snapshot-Cache", "miss")
response.Success(c, resp)
}
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