feat: nicer ui

5 files changed, 355 insertions, 11 deletions

diff --git a/internal/bot/bot.go b/internal/bot/bot.go
index 31c776d..1c8182d 100644
--- a/internal/bot/bot.go
+++ b/internal/bot/bot.go
@@ -1,12 +1,7 @@
-// Package bot implements Benson's Discord bot, which periodically checks
-// configured Modrinth mods for compatibility and posts reports to a channel.
 package bot
 
 import "fmt"
 
-// Run starts the Discord bot and blocks until it is stopped.
-//
-// TODO: port the Modrinth compatibility checker and Discord integration.
 func Run() error {
 	fmt.Println("benson bot — not yet implemented")
 	return nil
diff --git a/internal/cli/cli.go b/internal/cli/cli.go
index 337cb71..4e394e6 100644
--- a/internal/cli/cli.go
+++ b/internal/cli/cli.go
@@ -1,12 +1,199 @@
-// Package cli implements Benson's interactive server-manager REPL.
 package cli
 
-import "fmt"
+import (
+	"fmt"
+	"strings"
+
+	"github.com/charmbracelet/bubbles/spinner"
+	"github.com/charmbracelet/bubbles/textinput"
+	tea "github.com/charmbracelet/bubbletea"
+	"github.com/charmbracelet/lipgloss"
+
+	"github.com/hachem-wtf/benson/internal/config"
+)
+
+type command struct {
+	name string
+	desc string
+	run  func(m *model) tea.Cmd
+}
+
+type outputMsg struct {
+	text string
+}
+
+type model struct {
+	cfg     *config.Config
+	version string
+
+	input textinput.Model
+	spin  spinner.Model
+
+	commands []command
+	busy     bool
+	quitting bool
+
+	width int
+}
 
-// Run starts the interactive CLI. version is displayed in the banner.
-//
-// TODO: port the REPL and commands (list-mods, check, generate, merge, clean).
 func Run(version string) error {
-	fmt.Printf("benson CLI v%s — not yet implemented\n", version)
+	cfg, err := config.Load()
+	if err != nil {
+		return fmt.Errorf("failed to load %s: %w", config.Path(), err)
+	}
+
+	_, err = tea.NewProgram(newModel(cfg, version)).Run()
+	return err
+}
+
+func newModel(cfg *config.Config, version string) *model {
+	ti := textinput.New()
+	ti.Placeholder = "type a command… (try 'help')"
+	ti.Prompt = ""
+	ti.CharLimit = 128
+	ti.Focus()
+
+	sp := spinner.New()
+	sp.Spinner = spinner.Dot
+	sp.Style = lipgloss.NewStyle().Foreground(colPrimary)
+
+	m := &model{
+		cfg:     cfg,
+		version: version,
+		input:   ti,
+		spin:    sp,
+	}
+	m.commands = defaultCommands()
+	return m
+}
+
+func (m *model) Init() tea.Cmd {
+	return tea.Batch(textinput.Blink, tea.Println(welcomeBlock(m.cfg, m.version)))
+}
+
+func (m *model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
+	switch msg := msg.(type) {
+	case tea.WindowSizeMsg:
+		m.width = msg.Width
+		m.input.Width = max(msg.Width-12, 20)
+		return m, nil
+
+	case tea.KeyMsg:
+		switch msg.Type {
+		case tea.KeyCtrlC, tea.KeyCtrlD:
+			m.quitting = true
+			return m, tea.Quit
+		case tea.KeyTab:
+			if s := m.firstSuggestion(); s != "" {
+				m.input.SetValue(s)
+				m.input.CursorEnd()
+			}
+			return m, nil
+		case tea.KeyEnter:
+			if m.busy {
+				return m, nil
+			}
+			return m, m.submit()
+		}
+
+	case outputMsg:
+		m.busy = false
+		return m, tea.Println(msg.text)
+
+	case spinner.TickMsg:
+		var cmd tea.Cmd
+		m.spin, cmd = m.spin.Update(msg)
+		return m, cmd
+	}
+
+	var cmd tea.Cmd
+	m.input, cmd = m.input.Update(msg)
+	return m, cmd
+}
+
+func (m *model) View() string {
+	if m.quitting {
+		return ""
+	}
+	return "\n" + m.suggestionRow() + "\n" + m.promptLine() + "\n"
+}
+
+func (m *model) submit() tea.Cmd {
+	raw := strings.TrimSpace(m.input.Value())
+	m.input.Reset()
+	if raw == "" {
+		return nil
+	}
+
+	echo := tea.Println(promptStyle.Render("benson ❯ ") + raw)
+
+	name := strings.ToLower(strings.Fields(raw)[0])
+	if name == "?" {
+		name = "help"
+	}
+
+	if isExit(name) {
+		m.quitting = true
+		return tea.Sequence(echo, tea.Println(mutedStyle.Render("Goodbye!")), tea.Quit)
+	}
+
+	if c := m.find(name); c != nil {
+		return tea.Sequence(echo, c.run(m))
+	}
+
+	unknown := tea.Println(errorStyle.Render("Unknown command: "+name) + mutedStyle.Render("  ·  type 'help'"))
+	return tea.Sequence(echo, unknown)
+}
+
+func (m *model) find(name string) *command {
+	for i := range m.commands {
+		if m.commands[i].name == name {
+			return &m.commands[i]
+		}
+	}
 	return nil
 }
+
+func isExit(name string) bool {
+	switch name {
+	case "exit", "quit", "q":
+		return true
+	}
+	return false
+}
+
+func (m *model) promptLine() string {
+	if m.busy {
+		return "  " + m.spin.View() + " " + mutedStyle.Render("working…")
+	}
+	return promptStyle.Render("  benson ❯ ") + m.input.View()
+}
+
+func (m *model) suggestionRow() string {
+	cur := strings.ToLower(strings.TrimSpace(m.input.Value()))
+
+	chips := make([]string, 0, len(m.commands)+1)
+	for _, c := range m.commands {
+		if cur != "" && strings.HasPrefix(c.name, cur) {
+			chips = append(chips, chipActiveStyle.Render(c.name))
+		} else {
+			chips = append(chips, chipStyle.Render(c.name))
+		}
+	}
+	chips = append(chips, chipStyle.Render("exit"))
+
+	return "  " + lipgloss.JoinHorizontal(lipgloss.Left, chips...)
+}
+
+func (m *model) firstSuggestion() string {
+	cur := strings.ToLower(strings.TrimSpace(m.input.Value()))
+	if cur == "" {
+		return ""
+	}
+	for _, c := range m.commands {
+		if c.name != cur && strings.HasPrefix(c.name, cur) {
+			return c.name
+		}
+	}
+	return ""
+}
diff --git a/internal/cli/commands.go b/internal/cli/commands.go
new file mode 100644
index 0000000..1f1f132
--- /dev/null
+++ b/internal/cli/commands.go
@@ -0,0 +1,77 @@
+package cli
+
+import (
+	"fmt"
+	"strings"
+
+	tea "github.com/charmbracelet/bubbletea"
+	"github.com/charmbracelet/lipgloss"
+
+	"github.com/hachem-wtf/benson/internal/config"
+)
+
+func defaultCommands() []command {
+	return []command{
+		{
+			name: "list-mods",
+			desc: "List the configured mods",
+			run: func(m *model) tea.Cmd {
+				return tea.Println(renderModList(m.cfg))
+			},
+		},
+		{
+			name: "help",
+			desc: "Show available commands",
+			run: func(m *model) tea.Cmd {
+				return tea.Println(helpBlock(m.commands))
+			},
+		},
+	}
+}
+
+func welcomeBlock(cfg *config.Config, version string) string {
+	inner := lipgloss.JoinVertical(
+		lipgloss.Left,
+		titleStyle.Render("BENSON"),
+		subtitleStyle.Render("a Minecraft server manager from hell"),
+		"",
+		mutedStyle.Render(fmt.Sprintf("Fabric · MC %s · v%s", cfg.MinecraftVersion, version)),
+	)
+
+	hint := mutedStyle.Render("Type a command below. Tab autocompletes · Ctrl+C quits.")
+
+	return lipgloss.JoinVertical(lipgloss.Left, bannerStyle.Render(inner), "", hint)
+}
+
+func helpBlock(cmds []command) string {
+	rows := []string{headingStyle.Render("Commands"), ""}
+	for _, c := range cmds {
+		rows = append(rows, "  "+bulletStyle.Render(padRight(c.name, 14))+mutedStyle.Render(c.desc))
+	}
+	rows = append(rows, "  "+bulletStyle.Render(padRight("exit", 14))+mutedStyle.Render("Exit Benson"))
+	return lipgloss.JoinVertical(lipgloss.Left, rows...)
+}
+
+func renderModList(cfg *config.Config) string {
+	rows := []string{
+		headingStyle.Render(fmt.Sprintf("Mods for MC %s", cfg.MinecraftVersion)),
+		"",
+	}
+
+	if len(cfg.ModrinthMods) == 0 {
+		rows = append(rows, mutedStyle.Render("  (none configured)"))
+	}
+	for _, slug := range cfg.ModrinthMods {
+		rows = append(rows, "  "+bulletStyle.Render("◆ ")+slug)
+	}
+
+	rows = append(rows, "", mutedStyle.Render(fmt.Sprintf("Total: %d mods", len(cfg.ModrinthMods))))
+	return lipgloss.JoinVertical(lipgloss.Left, rows...)
+}
+
+func padRight(s string, n int) string {
+	if pad := n - len([]rune(s)); pad > 0 {
+		return s + strings.Repeat(" ", pad)
+	}
+	return s
+}
diff --git a/internal/cli/styles.go b/internal/cli/styles.go
new file mode 100644
index 0000000..c0a61e5
--- /dev/null
+++ b/internal/cli/styles.go
@@ -0,0 +1,40 @@
+package cli
+
+import "github.com/charmbracelet/lipgloss"
+
+var (
+	colPrimary = lipgloss.Color("#F97316")
+	colAccent  = lipgloss.Color("#A855F7")
+	colSuccess = lipgloss.Color("#22C55E")
+	colError   = lipgloss.Color("#EF4444")
+	colWarn    = lipgloss.Color("#EAB308")
+	colMuted   = lipgloss.Color("#6B7280")
+	colInk     = lipgloss.Color("#111827")
+
+	bannerStyle = lipgloss.NewStyle().
+			Border(lipgloss.RoundedBorder()).
+			BorderForeground(colPrimary).
+			Padding(0, 3)
+
+	titleStyle    = lipgloss.NewStyle().Bold(true).Foreground(colPrimary)
+	subtitleStyle = lipgloss.NewStyle().Foreground(colMuted)
+
+	promptStyle = lipgloss.NewStyle().Bold(true).Foreground(colAccent)
+
+	chipStyle = lipgloss.NewStyle().
+			Foreground(colMuted).
+			Padding(0, 1)
+
+	chipActiveStyle = lipgloss.NewStyle().
+			Foreground(colInk).
+			Background(colPrimary).
+			Bold(true).
+			Padding(0, 1)
+
+	headingStyle = lipgloss.NewStyle().Bold(true).Foreground(colAccent)
+	bulletStyle  = lipgloss.NewStyle().Foreground(colPrimary)
+	mutedStyle   = lipgloss.NewStyle().Foreground(colMuted)
+	successStyle = lipgloss.NewStyle().Foreground(colSuccess)
+	errorStyle   = lipgloss.NewStyle().Foreground(colError)
+	warnStyle    = lipgloss.NewStyle().Foreground(colWarn)
+)
diff --git a/internal/config/config.go b/internal/config/config.go
new file mode 100644
index 0000000..35842a1
--- /dev/null
+++ b/internal/config/config.go
@@ -0,0 +1,45 @@
+package config
+
+import (
+	"encoding/json"
+	"os"
+	"path/filepath"
+)
+
+type Config struct {
+	ChannelID            string   `json:"channel_id"`
+	CheckIntervalMinutes int      `json:"check_interval_minutes"`
+	MinecraftVersion     string   `json:"minecraft_version"`
+	FabricLoaderVersion  string   `json:"fabric_loader_version"`
+	LoaderMetaVersion    string   `json:"loader_meta_version"`
+	JavaPath             string   `json:"java_path"`
+	ServerLocation       string   `json:"server_location"`
+	BackupLocation       string   `json:"backup_location"`
+	MergePreCommand      string   `json:"merge_pre_command"`
+	MergePostCommand     string   `json:"merge_post_command"`
+	ModrinthMods         []string `json:"modrinth_mods"`
+}
+
+const Dir = "config"
+
+func Path() string {
+	return filepath.Join(Dir, "config.json")
+}
+
+func APIPath() string {
+	return filepath.Join(Dir, "api.json")
+}
+
+func Load() (*Config, error) {
+	data, err := os.ReadFile(Path())
+	if err != nil {
+		return nil, err
+	}
+
+	var c Config
+	if err := json.Unmarshal(data, &c); err != nil {
+		return nil, err
+	}
+
+	return &c, nil
+}