package render

import (
	"fmt"
	"git.5iot.com/iotlcm-public/iotlcm-bot/internal/archive"
	"sort"
	"strings"
)

func supplyBlock(a archive.RunArchive) string {
	if !isTrafficUsage(a.Run.Operation) || a.Run.SyncType == "replay" {
		return ""
	}
	s, present := a.Run.Supply()
	if !present {
		return ""
	}
	if s == nil {
		return "供料观测：不可用（遥测格式非法）；业务结果不受影响"
	}
	status := []string{}
	if s.Partial {
		status = append(status, "partial")
	}
	if s.Truncated {
		status = append(status, "truncated")
	}
	if len(status) == 0 {
		status = append(status, "完整")
	}
	unknown, unconfirmed := s.Summary.UnknownMS, s.Summary.UnconfirmedMS
	lines := []string{"供料观测（Run 首轮扫描窗口，约1秒分辨率，时间为采样估计）", fmt.Sprintf("目标 %d · 有效 %d · 确认缺料 %d · unknown 通道 %d", s.Summary.Targets, s.Summary.Valid, s.Summary.Confirmed, s.Summary.Unknown), fmt.Sprintf("最长中断 %.1f秒 · 累计 %.1f通道秒（允许通道重叠）", float64(s.Summary.LongestMS)/1000, float64(s.Summary.TotalMS)/1000), fmt.Sprintf("待确认空闲 %.1f通道秒 · unknown %.1f通道秒 · %s", float64(unconfirmed)/1000, float64(unknown)/1000, strings.Join(status, " / "))}
	if s.Truncated {
		lines = append(lines, "明细已截断；Run摘要覆盖全部目标，归档保留最长等待前100通道")
	}
	if s.Summary.Confirmed == 0 && !s.Partial && !s.Truncated && s.Summary.Unknown == 0 && unconfirmed == 0 && s.Summary.Valid == s.Summary.Targets {
		lines = append(lines, "约1秒分辨率下未发现确认缺料")
	}
	channels := append([]archive.SupplyChannel(nil), s.Channels...)
	sort.Slice(channels, func(i, j int) bool {
		a, b := channels[i], channels[j]
		av, bv := max(a.Startup.LongestMS, a.Confirmed.LongestMS), max(b.Startup.LongestMS, b.Confirmed.LongestMS)
		if av == bv {
			return a.Key < b.Key
		}
		return av > bv
	})
	for _, c := range channels[:min(5, len(channels))] {
		longest := max(c.Startup.LongestMS, c.Confirmed.LongestMS)
		if longest == 0 {
			continue
		}
		phase := "未记录"
		var phaseMS int64
		for k, v := range c.Stages {
			if v > phaseMS || (v == phaseMS && k < phase) {
				phase, phaseMS = k, v
			}
		}
		signal := ""
		if longest >= 5000 {
			signal = "（≥5秒排查信号）"
		}
		lines = append(lines, fmt.Sprintf("%s：最长 %.1f秒%s；启动 %.1f秒 / 后续 %.1f秒；同期主要生产者阶段 %s %.1f秒", c.Key, float64(longest)/1000, signal, float64(c.Startup.TotalMS)/1000, float64(c.Confirmed.TotalMS)/1000, phase, float64(phaseMS)/1000))
	}
	lines = append(lines, "小于采样间隔的中断可能漏检；同期阶段不证明因果，5秒提示不构成SLA。完整明细见归档。")
	return strings.Join(lines, "\n")
}