package cli

import (
	"testing"

	"github.com/gdamore/tcell/v2"
	api "sneak.berlin/go/neoirc/internal/cli/api"
	"sneak.berlin/go/neoirc/pkg/irc"
)

func TestMemberPrefix(t *testing.T) {
	t.Parallel()

	tests := []struct {
		name   string
		member api.Member
		want   string
	}{
		{
			name:   "operator",
			member: api.Member{Nick: "alice", IsOperator: true},
			want:   "@",
		},
		{
			name:   "voiced member",
			member: api.Member{Nick: "bob", IsVoiced: true},
			want:   "+",
		},
		{
			name: "voiced operator",
			member: api.Member{
				Nick: "Carol", IsOperator: true, IsVoiced: true,
			},
			want: "@",
		},
		{
			name:   "plain member",
			member: api.Member{Nick: "dave"},
			want:   "",
		},
	}

	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			t.Parallel()

			got := memberPrefix(test.member)
			if got != test.want {
				t.Fatalf("got %q, want %q", got, test.want)
			}
		})
	}
}

// TestPartEvent checks that a PART event adds a line to the
// channel's buffer and marks it unread, except for the
// user's own part, which cmdPart has already shown.
func TestPartEvent(t *testing.T) {
	t.Parallel()

	tests := []struct {
		name       string
		from       string
		wantLines  int
		wantUnread int
	}{
		{name: "own part", from: "erin", wantLines: 0, wantUnread: 0},
		{name: "other member", from: "bob", wantLines: 1, wantUnread: 1},
	}

	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			t.Parallel()

			app := &App{ui: NewUI(), nick: "erin"}
			runUI(t, app.ui)

			app.handleServerMessage(&api.Message{
				Command: irc.CmdPart, From: test.from, To: "#chan",
			})

			var lines, unread int

			app.ui.app.QueueUpdate(func() {
				buf := app.ui.getOrCreateBuffer("#chan")
				lines = len(buf.Lines)
				unread = buf.Unread
			})

			if lines != test.wantLines || unread != test.wantUnread {
				t.Fatalf("got %d lines and %d unread, want %d and %d",
					lines, unread, test.wantLines, test.wantUnread)
			}
		})
	}
}

// runUI runs ui on a simulated screen until the test ends.
func runUI(t *testing.T, ui *UI) {
	t.Helper()

	ui.app.SetScreen(tcell.NewSimulationScreen(""))

	done := make(chan error)

	go func() { done <- ui.Run() }()

	t.Cleanup(func() {
		ui.Stop()

		err := <-done
		if err != nil {
			t.Errorf("run ui: %v", err)
		}
	})
}