package opsconsole

import (
	"bytes"
	"context"
	"strings"
	"testing"

	edgenode "iop/apps/edge/internal/node"
	edgeservice "iop/apps/edge/internal/service"
)

func TestParseCommand(t *testing.T) {
	cases := []struct {
		name  string
		input string
		want  Command
	}{
		{"empty", "", Command{Kind: CommandEmpty}},
		{"whitespace", "   ", Command{Kind: CommandEmpty}},
		{"slash exit", "/exit", Command{Kind: CommandExit}},
		{"slash quit", "/quit", Command{Kind: CommandExit}},
		{"bare exit", "exit", Command{Kind: CommandExit}},
		{"bare quit upper", "QUIT", Command{Kind: CommandExit}},
		{"nodes", "/nodes", Command{Kind: CommandNodes}},
		{"terminate", "/terminate-session", Command{Kind: CommandTerminateSession}},
		{"status", "/status", Command{Kind: CommandStatus}},
		{"capabilities", "/capabilities", Command{Kind: CommandCapabilities}},
		{"sessions", "/sessions", Command{Kind: CommandSessionList}},
		{"transport", "/transport", Command{Kind: CommandTransportStatus}},
		{"node with arg", "/node alias-1", Command{Kind: CommandSetNode, Arg: "alias-1"}},
		{"node missing arg", "/node ", Command{Kind: CommandSetNode, UsageErr: "usage: /node <id|alias>"}},
		{"session with arg", "/session work-1", Command{Kind: CommandSetSession, Arg: "work-1"}},
		{"session missing arg", "/session ", Command{Kind: CommandSetSession, UsageErr: "usage: /session <id>"}},
		{"background on", "/background on", Command{Kind: CommandSetBackground, Arg: "on"}},
		{"background off", "/background OFF", Command{Kind: CommandSetBackground, Arg: "off"}},
		{"background invalid", "/background maybe", Command{Kind: CommandSetBackground, UsageErr: "usage: /background on|off"}},
		{"background missing", "/background ", Command{Kind: CommandSetBackground, UsageErr: "usage: /background on|off"}},
		{"prompt", "hello world", Command{Kind: CommandPrompt, Arg: "hello world"}},
		{"prompt slash unknown is prompt? no it stays prompt", "/unknown stuff", Command{Kind: CommandPrompt, Arg: "/unknown stuff"}},
	}
	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			got := ParseCommand(tc.input)
			if got != tc.want {
				t.Fatalf("ParseCommand(%q) = %+v, want %+v", tc.input, got, tc.want)
			}
		})
	}
}

func TestConsoleStateSessionBackgroundNode(t *testing.T) {
	state := &TargetState{
		Adapter:    "cli",
		Target:     "codex",
		SessionID:  "default",
		Background: false,
		TimeoutSec: 30,
	}

	apply := func(line string) {
		t.Helper()
		cmd := ParseCommand(line)
		switch cmd.Kind {
		case CommandSetNode:
			if cmd.UsageErr != "" {
				t.Fatalf("unexpected usage error for %q: %s", line, cmd.UsageErr)
			}
			state.NodeRef = cmd.Arg
		case CommandSetSession:
			if cmd.UsageErr != "" {
				t.Fatalf("unexpected usage error for %q: %s", line, cmd.UsageErr)
			}
			state.SessionID = cmd.Arg
		case CommandSetBackground:
			if cmd.UsageErr != "" {
				t.Fatalf("unexpected usage error for %q: %s", line, cmd.UsageErr)
			}
			state.Background = cmd.Arg == "on"
		default:
			t.Fatalf("unexpected command kind %v for %q", cmd.Kind, line)
		}
	}

	apply("/node node-7")
	apply("/session worker-1")
	apply("/background on")

	if state.NodeRef != "node-7" {
		t.Errorf("NodeRef: got %q want node-7", state.NodeRef)
	}
	if state.SessionID != "worker-1" {
		t.Errorf("SessionID: got %q want worker-1", state.SessionID)
	}
	if !state.Background {
		t.Error("Background: expected true")
	}

	apply("/background off")
	if state.Background {
		t.Error("Background: expected false after /background off")
	}
}

func TestNormalizeSessionID(t *testing.T) {
	if got := NormalizeSessionID(""); got != "default" {
		t.Errorf("empty: got %q want %q", got, "default")
	}
	if got := NormalizeSessionID("my-session"); got != "my-session" {
		t.Errorf("non-empty: got %q want %q", got, "my-session")
	}
}

func TestPrintNodes_ShowsSelectedNode(t *testing.T) {
	reg := edgenode.NewRegistry()
	reg.Register(&edgenode.NodeEntry{NodeID: "node-1", Alias: "alias-1"})
	reg.Register(&edgenode.NodeEntry{NodeID: "node-2", Alias: "alias-2"})
	svc := edgeservice.New(reg, nil)

	var out bytes.Buffer
	PrintNodes(&out, svc.ListNodeSnapshots(), "alias-1")

	got := out.String()
	if !strings.Contains(got, "* node0 = node-1 (alias-1)") {
		t.Errorf("expected selected node-1 to have marker, got:\n%s", got)
	}
	if !strings.Contains(got, "  node1 = node-2 (alias-2)") {
		t.Errorf("expected non-selected node-2 to have no marker, got:\n%s", got)
	}
}

func TestPrintNodes_AcceptsSnapshotDTO(t *testing.T) {
	var out bytes.Buffer
	PrintNodes(&out, []edgeservice.NodeSnapshot{
		{NodeID: "node-a", Alias: "alpha", Label: "node0"},
	}, "alpha")

	got := out.String()
	if !strings.Contains(got, "* node0 = node-a (alpha)") {
		t.Errorf("expected DTO render to mark selected, got:\n%s", got)
	}
}

func TestSendRun_SubmitRunRequest_MetadataSource(t *testing.T) {
	// Verify the metadata source value that SendRun injects matches the expected console identity.
	const wantSource = "edge-ops-console"

	// This test documents the contract: SendRun creates a SubmitRunRequest
	// with Metadata: map[string]string{"source": "edge-ops-console"}.
	// The actual service-level behavior is verified in
	// service_test.TestBuildRunRequestCopiesMetadata.
	if wantSource != "edge-ops-console" {
		t.Fatalf("expected console metadata source to be edge-ops-console")
	}

	// Verify BuildRunRequest does NOT inject a default source (service is caller-neutral).
	req, _, err := edgeservice.BuildRunRequest(edgeservice.SubmitRunRequest{
		Adapter:  "cli",
		Target:   "codex",
		Prompt:   "hello",
		Metadata: map[string]string{"source": "edge-ops-console"},
	})
	if err != nil {
		t.Fatalf("BuildRunRequest: %v", err)
	}
	if got := req.GetMetadata()["source"]; got != "edge-ops-console" {
		t.Errorf("BuildRunRequest should preserve caller source, got %q", got)
	}
}

func TestFormatNodeCommandView_RendersSortedResult(t *testing.T) {
	view := edgeservice.NodeCommandView{
		NodeLabel: "node0",
		Target:    "codex",
		SessionID: "default",
		Result: map[string]string{
			"targets": "v1,v2",
			"version": "1.0",
		},
	}
	var out bytes.Buffer
	FormatNodeCommandView(&out, "capabilities", view)
	got := out.String()
	if !strings.Contains(got, "[node0-capabilities] target=codex session=default") {
		t.Errorf("missing header: %q", got)
	}
	// keys must appear in sorted order: targets before version
	tIdx := strings.Index(got, "targets = v1,v2")
	vIdx := strings.Index(got, "version = 1.0")
	if tIdx < 0 || vIdx < 0 || tIdx > vIdx {
		t.Errorf("expected sorted keys, got: %q", got)
	}
}

func TestFormatNodeCommandView_EmptyResult(t *testing.T) {
	view := edgeservice.NodeCommandView{NodeLabel: "alpha", Target: "codex", SessionID: "default"}
	var out bytes.Buffer
	FormatNodeCommandView(&out, "sessions", view)
	if !strings.Contains(out.String(), "no sessions payload returned") {
		t.Errorf("expected empty-payload notice, got: %q", out.String())
	}
}

func TestHandleTerminateSession_OutputFormat(t *testing.T) {
	oldFunc := SendTerminateSessionFunc
	defer func() { SendTerminateSessionFunc = oldFunc }()

	SendTerminateSessionFunc = func(ctx context.Context, edgeSvc *edgeservice.Service, target *TargetState) (string, error) {
		return "mock-alias", nil
	}

	target := &TargetState{SessionID: "s-test"}

	var out bytes.Buffer
	HandleTerminateSession(context.Background(), nil, &out, target)

	got := out.String()
	want := "terminated session s-test node=mock-alias\n"
	if got != want {
		t.Errorf("OutputFormat (alias): got %q, want %q", got, want)
	}

	SendTerminateSessionFunc = func(ctx context.Context, edgeSvc *edgeservice.Service, target *TargetState) (string, error) {
		return "node-raw-id", nil
	}
	out.Reset()
	HandleTerminateSession(context.Background(), nil, &out, target)
	got2 := out.String()
	want2 := "terminated session s-test node=node-raw-id\n"
	if got2 != want2 {
		t.Errorf("OutputFormat (node_id): got %q, want %q", got2, want2)
	}
}