package main

import (
	_ "embed"
	"fmt"
	"net/http"
	"strconv"

	"github.com/kami/maven/internal/ipc"
)

//go:embed notifications.html
var notificationsHTML string

var notificationsTmpl = parsePage("notifications", notificationsHTML, nil)

// deliveryRow is one outbox line, with every timestamp already formatted so
// the template holds no date logic — same shape as taskRow.
type deliveryRow struct {
	Kind      string
	Target    string
	Channel   string
	Status    string
	Created   string
	Completed string
}

func deliveryRows(as []ipc.DeliveryAttempt) []deliveryRow {
	out := make([]deliveryRow, 0, len(as))
	for _, a := range as {
		target := a.Rule
		if target == "" && a.ReminderID != 0 {
			target = "reminder #" + strconv.FormatInt(a.ReminderID, 10)
		}
		row := deliveryRow{
			Kind:    a.Kind,
			Target:  target,
			Channel: a.Channel,
			Status:  a.Status,
			Created: a.Created.Format("02.01 15:04"),
		}
		if a.Completed != nil {
			row.Completed = a.Completed.Format("15:04")
		}
		out = append(out, row)
	}
	return out
}

func handleNotifications(w http.ResponseWriter, r *http.Request, core ipc.CoreAPI) {
	if !requireCore(w, r, core, "notifications") {
		return
	}
	ctx := r.Context()
	nudges, err := core.RecentNudges(ctx, 50)
	if err != nil {
		writeProblem(w, r, http.StatusBadGateway, problemCoreReadFailed,
			"notifications unavailable", fmt.Errorf("read recent nudges: %w", err))
		return
	}
	// The outbox, on the page that already answers "what did she send".
	// A failed or dropped attempt is why she went quiet, and until now it was
	// recorded and unreadable (Vikunja #390). Filter with ?status=dropped.
	status := r.URL.Query().Get("status")
	attempts, err := core.DeliveryAttempts(ctx, status, 50)
	if err != nil {
		// The nudge list is still worth showing, so this is a note on the page
		// rather than a dead page.
		logProblem(r, http.StatusOK, problemCoreReadFailed,
			"delivery attempts unavailable", fmt.Errorf("read delivery attempts: %w", err))
	}
	renderPage(w, notificationsTmpl, map[string]any{
		"Nudges":   nudges,
		"Attempts": deliveryRows(attempts),
		"Status":   status,
	})
}