1 files changed, 124 insertions, 0 deletions
diff --git a/internal/client/ui.go b/internal/client/ui.go
new file mode 100644
index 0000000..839c0cd
--- /dev/null
+++ b/internal/client/ui.go
@@ -0,0 +1,124 @@
+package client
+
+import (
+	"fmt"
+	"log"
+	"strings"
+
+	"github.com/charmbracelet/bubbles/cursor"
+	"github.com/charmbracelet/bubbles/textarea"
+	"github.com/charmbracelet/bubbles/viewport"
+	tea "github.com/charmbracelet/bubbletea"
+	"github.com/charmbracelet/lipgloss"
+
+	"github.com/kyren223/eko/pkg/assert"
+)
+
+func startUI() {
+	p := tea.NewProgram(initialModel(), tea.WithAltScreen())
+	if _, err := p.Run(); err != nil {
+		log.Println("charm ui error:", err)
+	}
+}
+
+type model struct {
+	viewport    viewport.Model
+	messages    []string
+	textarea    textarea.Model
+	senderStyle lipgloss.Style
+	err         error
+}
+
+func initialModel() model {
+	ta := textarea.New()
+	ta.Placeholder = "Send a message..."
+	ta.Focus()
+
+	ta.Prompt = "┃ "
+	ta.CharLimit = 280
+
+	ta.SetWidth(30)
+	ta.SetHeight(3)
+
+	// Remove cursor line styling
+	ta.FocusedStyle.CursorLine = lipgloss.NewStyle()
+
+	ta.ShowLineNumbers = false
+
+	vp := viewport.New(30, 20)
+	vp.SetContent("Welcome to Eko!\n Type a message and press Enter to send.")
+
+	ta.KeyMap.InsertNewline.SetEnabled(false)
+
+	messages, err := getMessages()
+	assert.NoError(err, "TODO HANDLE ERROR")
+	vp.SetContent(strings.Join(messages, "\n"))
+
+	return model{
+		textarea:    ta,
+		messages:    messages,
+		viewport:    vp,
+		senderStyle: lipgloss.NewStyle().Foreground(lipgloss.Color("5")),
+		err:         nil,
+	}
+}
+
+func (m model) Init() tea.Cmd {
+	return textarea.Blink
+}
+
+func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
+	switch msg := msg.(type) {
+	case tea.WindowSizeMsg:
+		m.viewport.Width = msg.Width
+		m.textarea.SetWidth(msg.Width)
+		return m, tea.Printf("%dx%d", msg.Width, msg.Height)
+	case tea.KeyMsg:
+		switch msg.Type {
+		case tea.KeyEsc, tea.KeyCtrlC:
+			// Quit.
+			fmt.Println(m.textarea.Value())
+			return m, tea.Quit
+		case tea.KeyEnter:
+			value := m.textarea.Value()
+
+			content := strings.TrimSpace(value)
+			if content == "" {
+				// Don't send empty messages.
+				return m, nil
+			}
+			assert.NoError(sendMessage(content), "TODO HANDLE ERROR")
+			messages, err := getMessages()
+			assert.NoError(err, "TODO HANDLE ERROR")
+
+			// m.messages = append(m.messages, m.senderStyle.Render("You: ")+content)
+			m.messages = messages
+			m.viewport.SetContent(strings.Join(m.messages, "\n"))
+			m.textarea.Reset()
+			m.viewport.GotoBottom()
+			return m, nil
+		default:
+			// Send all other keypresses to the textarea.
+			var cmd tea.Cmd
+			m.textarea, cmd = m.textarea.Update(msg)
+			return m, cmd
+		}
+
+	case cursor.BlinkMsg:
+		// Textarea should also process cursor blinks.
+		var cmd tea.Cmd
+		m.textarea, cmd = m.textarea.Update(msg)
+		return m, cmd
+
+	default:
+		return m, nil
+	}
+}
+
+func (m model) View() string {
+	return fmt.Sprintf(
+		"%s\n\n%s",
+		m.viewport.View(),
+		m.textarea.View(),
+	) + "\n\n"
+}