package app

import (
	"context"
	"strings"
	"time"

	tea "charm.land/bubbletea/v2"

	"gitea.oxpoe.qzz.io/oxpoe/tia-love/internal/docker"
	"gitea.oxpoe.qzz.io/oxpoe/tia-love/internal/i18n"
)

// eventMsg — satu event Docker dari stream (volume rendah; 1 event = 1 render).
type eventMsg struct {
	id int64
	ev docker.Event
}
type eventsClosedMsg struct{ id int64 }
type eventsRetryMsg struct{ id int64 }
type refreshTickMsg struct{ gen int64 }

const (
	activityMax      = 20
	refreshDebounce  = 500 * time.Millisecond
	eventsRetryDelay = 5 * time.Second
)

// startEvents — (re)buka stream event daemon. Dipanggil dari New (init), `r`,
// dan retry otomatis saat koneksi putus.
func (m *Model) startEvents() tea.Cmd {
	if m.eventsCancel != nil {
		m.eventsCancel()
		m.eventsCancel = nil
	}
	m.eventsCh = nil
	if m.cl == nil {
		return nil
	}
	m.eventsID++
	ctx, cancel := context.WithCancel(context.Background())
	m.eventsCancel = cancel
	m.eventsCh = m.cl.StreamEvents(ctx)
	return waitEvent(m.eventsID, m.eventsCh)
}

func waitEvent(id int64, ch <-chan docker.Event) tea.Cmd {
	return func() tea.Msg {
		ev, ok := <-ch
		if !ok {
			return eventsClosedMsg{id: id}
		}
		return eventMsg{id: id, ev: ev}
	}
}

func refreshAfter(gen int64) tea.Cmd {
	return tea.Tick(refreshDebounce, func(time.Time) tea.Msg { return refreshTickMsg{gen: gen} })
}

func eventsRetry(id int64) tea.Cmd {
	return tea.Tick(eventsRetryDelay, func(time.Time) tea.Msg { return eventsRetryMsg{id: id} })
}

// evTypeKey — jenis event → kunci katalog bagian (untuk label terjemahan).
func evTypeKey(t string) string {
	switch t {
	case "image":
		return "images"
	case "volume":
		return "volumes"
	case "network":
		return "networks"
	default:
		return "containers"
	}
}

// activityLines — event terbaru di atas (untuk panel Aktivitas di beranda).
func (m Model) activityLines(w, h int) []string {
	if len(m.activity) == 0 {
		return []string{dim(i18n.T("activity.waiting"))}
	}
	out := make([]string, 0, h)
	for i := len(m.activity) - 1; i >= 0 && len(out) < h; i-- {
		ev := m.activity[i]
		label := strings.ToLower(i18n.T("section." + evTypeKey(ev.Type)))
		out = append(out, dim(ev.At.Format("15:04:05"))+" "+
			dim("["+label+"]")+" "+
			text("'"+truncate(ev.Actor, 20)+"'")+" "+
			dim(truncate(ev.Action, 24)))
	}
	return out
}