package cli

import (
	"strings"
	"testing"

	"time"

	tea "github.com/charmbracelet/bubbletea"

	"gitea.mynodes.xyz/ilker/llmgw/internal/control/adminapi"
	"gitea.mynodes.xyz/ilker/llmgw/internal/onboard"
)

func send(m tea.Model, msgs ...tea.Msg) tea.Model {
	for _, msg := range msgs {
		m, _ = m.Update(msg)
	}
	return m
}

func TestTheNodeScreenFillsInAsStepsFinish(t *testing.T) {
	var m tea.Model = newNodeModel("adding gpu01", func() {})
	m = send(m,
		evMsg{Step: onboard.StepConnect, Level: onboard.Done, Detail: "gpu01 (amd64)"},
		evMsg{Step: onboard.StepCheck, Level: onboard.Warn, Detail: "fabric: nvidia_peermem is not loaded", Fix: "modprobe nvidia_peermem"},
		evMsg{Step: onboard.StepCheck, Level: onboard.Running, Detail: "running llmgw doctor"},
	)
	v := m.View()
	for _, want := range []string{"✓", "gpu01 (amd64)", "nvidia_peermem is not loaded", "→ modprobe nvidia_peermem", "running llmgw doctor", "engines"} {
		if !strings.Contains(v, want) {
			t.Errorf("screen lacks %q:\n%s", want, v)
		}
	}
}

func TestTheFabricQuestionAnswersWithWhatWasTyped(t *testing.T) {
	var m tea.Model = newNodeModel("adding gpu01", func() {})
	reply := make(chan []onboard.Fabric, 1)
	m = send(m, askFabricsMsg{suggested: []onboard.Fabric{
		{Name: "fabric1", HCAs: []string{"mlx5_0", "mlx5_1"}},
		{Name: "fabric2", HCAs: []string{"mlx5_4"}},
	}, reply: reply})
	if v := m.View(); !strings.Contains(v, "Which fabric") || !strings.Contains(v, "mlx5_0, mlx5_1") {
		t.Fatalf("no question on screen:\n%s", m.View())
	}
	// Rename the first to ib-a, empty the second to leave it out.
	for range len("fabric1") {
		m = send(m, tea.KeyMsg{Type: tea.KeyBackspace})
	}
	m = send(m, tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune("ib-a")}, tea.KeyMsg{Type: tea.KeyTab})
	for range len("fabric2") {
		m = send(m, tea.KeyMsg{Type: tea.KeyBackspace})
	}
	m = send(m, tea.KeyMsg{Type: tea.KeyEnter})
	got := <-reply
	if len(got) != 1 || got[0].Name != "ib-a" || strings.Join(got[0].HCAs, ",") != "mlx5_0,mlx5_1" {
		t.Errorf("got %+v", got)
	}
	if strings.Contains(m.View(), "Which fabric") {
		t.Error("the question stayed on screen after it was answered")
	}
}

func TestContinuingPastAProblemIsNoUnlessSaidYes(t *testing.T) {
	var m tea.Model = newNodeModel("adding gpu01", func() {})
	reply := make(chan bool, 1)
	m = send(m, askContinueMsg{fails: 2, reply: reply}, tea.KeyMsg{Type: tea.KeyEnter})
	if <-reply {
		t.Error("enter went on past the problems")
	}
	m = send(m, askContinueMsg{fails: 2, reply: reply}, tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune("y")})
	if !<-reply {
		t.Error("y did not go on")
	}
	_ = m
}

func TestANodeCountsAsJoinedOnlyWhenHeardSinceItsAgentStarted(t *testing.T) {
	start := time.Now().Add(-10 * time.Second)
	cases := []struct {
		state, ago string
		want       bool
	}{
		{"ready", "3s", true},
		{"cordoned", "3s", true}, // added again while cordoned
		{"ready", "30s", false},  // the agent before the restart
		{"unreachable", "3s", false},
		{"ready", "", false},
	}
	for _, c := range cases {
		if got := heardSince(adminapi.NodeView{State: c.state, LastSeenAgo: c.ago}, start); got != c.want {
			t.Errorf("%s seen %q ago: got %v", c.state, c.ago, got)
		}
	}
}

func TestAFabricNamedForOneNodeIsNotAskedAgainForTheNext(t *testing.T) {
	na := &nodeAdd{named: map[string]string{}}
	asked := 0
	ask := func(s []onboard.Fabric) []onboard.Fabric {
		asked++
		return []onboard.Fabric{{Name: "ib-compute", HCAs: s[0].HCAs, Key: s[0].Key}}
	}
	first := na.rememberFabrics(ask)([]onboard.Fabric{{Name: "fabric", HCAs: []string{"mlx5_0"}, Key: "sm:0xa"}})
	second := na.rememberFabrics(ask)([]onboard.Fabric{{Name: "fabric", HCAs: []string{"mlx5_0", "mlx5_1"}, Key: "sm:0xa"}})
	if asked != 1 {
		t.Errorf("asked %d times", asked)
	}
	if len(second) != 1 || second[0].Name != "ib-compute" || len(second[0].HCAs) != 2 || first[0].Name != "ib-compute" {
		t.Errorf("first %+v second %+v", first, second)
	}
	// A fabric not seen before is asked about; in a script nothing is asked.
	if got := na.rememberFabrics(nil)([]onboard.Fabric{{Name: "fabric", Key: "sm:0xb"}}); len(got) != 0 {
		t.Errorf("a script was given a fabric nobody named: %+v", got)
	}
}