package cli

import (
	"fmt"
	"strings"
	"time"

	"gitea.mynodes.xyz/ilker/llmgw/internal/control/federation"
)

// The console's federation view: the other llmgw clusters whose models are
// offered here, whether each is up and how far away, as `llmgw ctl
// federation list` shows them. Peers are added and removed with ctl, which
// needs a key file on this machine that a form here could not check.

func (m consoleModel) federationPanel(pw int) (string, string, string) {
	keys := "→ or Enter open · ↑↓ choose · Q leave"
	if m.inPanel {
		keys = "↑↓ peer · Enter its models · ← back · Q leave"
	}
	v := m.data.federation
	head := "\n  " + sDim.Render("Other llmgw clusters whose models are offered here as PEER/MODEL.")
	if v.Cluster != "" {
		head += "\n  " + sDim.Render("This cluster's id: "+v.Cluster)
	}
	head += "\n\n"
	if len(v.Peers) == 0 {
		return "Federation", head + "  " + sDim.Render("No peers. Add one with: llmgw ctl federation add NAME --url URL --key-file FILE"), keys
	}
	var rows [][]string
	for _, p := range v.Peers {
		health := sOK.Render("up")
		if !p.Up {
			health = sBad.Render("down")
		}
		lat := "-"
		if p.Latency > 0 {
			lat = fmt.Sprintf("%.1fms", p.LatencyMs)
		}
		offered := 0
		for _, md := range p.Models {
			if !md.Withdrawn {
				offered++
			}
		}
		rows = append(rows, []string{p.Name, health, lat, fmt.Sprint(offered), p.URL})
	}
	return "Federation", head + table([]string{"PEER", "HEALTH", "LATENCY", "MODELS", "URL"}, rows, m.row, pw, m.inPanel), keys
}

// peerDialog is one peer whole: how it was last found, and its models.
func peerDialog(p federation.Status) (string, string) {
	var b strings.Builder
	fmt.Fprintf(&b, "%s\n", p.URL)
	if p.Up {
		fmt.Fprintf(&b, "%s, /ready in %.1fms", sOK.Render("up"), p.LatencyMs)
	} else {
		fmt.Fprintf(&b, "%s: %s", sBad.Render("down"), wrap(p.Error, 80, "  "))
	}
	if !p.Checked.IsZero() {
		fmt.Fprintf(&b, ", checked %s ago", time.Since(p.Checked).Round(time.Second))
	}
	tags := "not told who asks"
	if p.SendTags {
		tags = "told this cluster and the project of each request (x-llmgw-tags)"
	}
	fmt.Fprintf(&b, "\ncluster %s, key %s; %s\n\n", p.Cluster, p.KeyFile, tags)
	if len(p.Models) == 0 {
		b.WriteString(sDim.Render("offers this cluster's key no models") + "\n")
	}
	for _, md := range p.Models {
		line := md.Name
		if md.Withdrawn {
			line += sDim.Render("  withdrawn by the peer; kept while a fallback here names it")
		}
		b.WriteString("  " + line + "\n")
	}
	fmt.Fprintf(&b, "\n%s", sDim.Render("llmgw ctl federation sync|remove "+p.Name+" · any key"))
	return p.Name, b.String()
}