package model

import (
	"encoding/json"
	"time"
)

// Broadcast is an announcement shown to every user exactly once.
//
// Deliberately not a notification: it creates no tray rows and no per-user
// records until someone actually dismisses it. The modal is the delivery
// surface; push and the realtime nudge only tell clients to go look.
type Broadcast struct {
	ID    string `json:"id"`
	Title string `json:"title"`
	Body  string `json:"body"`
	// Entities are offset/length formatting spans, the same shape chat uses,
	// so no HTML is ever stored or rendered.
	Entities json.RawMessage `json:"entities"`
	// BannerURL is resolved from the stored R2 key for the client.
	BannerURL *string `json:"banner_url,omitempty"`
	CTALabel  *string `json:"cta_label,omitempty"`
	CTAURL    *string `json:"cta_url,omitempty"`

	PublishedAt *time.Time `json:"published_at,omitempty"`
	ExpiresAt   *time.Time `json:"expires_at,omitempty"`
	CreatedAt   time.Time  `json:"created_at"`

	// SeenCount is filled for the admin list only — how many people have
	// dismissed it so far.
	SeenCount int64 `json:"seen_count,omitempty"`
}

// Live reports whether the broadcast is currently deliverable.
func (b *Broadcast) Live(now time.Time) bool {
	if b.PublishedAt == nil || b.PublishedAt.After(now) {
		return false
	}
	return b.ExpiresAt == nil || b.ExpiresAt.After(now)
}