export function registerKioskFlow(Alpine) {
    Alpine.data('kioskFlow', (config = {}) => ({
        step: 'select',
        queueId: null,
        customerName: '',
        customerPhone: '',
        ticket: null,
        error: null,
        loading: false,
        issueUrl: config.issueUrl,
        csrf: config.csrf,

        selectQueue(id) {
            this.queueId = id;
            this.step = 'details';
        },

        async issue() {
            if (! this.queueId) return;
            this.loading = true;
            this.error = null;
            try {
                const res = await fetch(this.issueUrl, {
                    method: 'POST',
                    headers: {
                        'Content-Type': 'application/json',
                        'Accept': 'application/json',
                        'X-CSRF-TOKEN': this.csrf,
                    },
                    body: JSON.stringify({
                        queue_id: this.queueId,
                        customer_name: this.customerName || null,
                        customer_phone: this.customerPhone || null,
                    }),
                });
                const data = await res.json();
                if (! res.ok) throw new Error(data.message || 'Could not issue ticket');
                this.ticket = data.data;
                this.step = 'ticket';
            } catch (e) {
                this.error = e.message || 'Something went wrong';
            } finally {
                this.loading = false;
            }
        },

        reset() {
            this.step = 'select';
            this.queueId = null;
            this.customerName = '';
            this.customerPhone = '';
            this.ticket = null;
            this.error = null;
        },
    }));

    Alpine.data('displayBoard', (config = {}) => ({
        payload: null,
        announcedIds: {},
        isAnnouncing: false,
        dataUrl: typeof config === 'string' ? config : config.dataUrl,
        playedUrlTemplate: config.playedUrl ?? null,
        pollMs: config.pollMs ?? 1200,
        csrf: config.csrf ?? document.querySelector('meta[name="csrf-token"]')?.content ?? '',

        async poll() {
            try {
                const res = await fetch(this.dataUrl, { headers: { Accept: 'application/json' } });
                this.payload = await res.json();
                this.maybeAnnounce(this.payload?.announcements ?? []);
            } catch (e) {
                console.error('Display poll failed', e);
            }
        },

        maybeAnnounce(announcements) {
            if (! window.speechSynthesis || this.isAnnouncing || ! announcements.length) {
                return;
            }

            const next = announcements.find((item) => item?.id && item?.message && ! this.announcedIds[item.id]);
            if (! next) {
                return;
            }

            this.isAnnouncing = true;
            this.announcedIds[next.id] = true;
            this.speakAnnouncement(next);
        },

        speakAnnouncement(item) {
            const repeats = Math.max(1, Number(item.repeat_count) || 1);
            const volume = Math.min(1, Math.max(0, (Number(item.volume) || 80) / 100));
            let remaining = repeats;

            const finish = () => {
                this.isAnnouncing = false;
                this.ackPlayed(item.id);
                this.maybeAnnounce(this.payload?.announcements ?? []);
            };

            const speakOnce = () => {
                window.speechSynthesis.resume?.();

                const utter = new SpeechSynthesisUtterance(item.message);
                utter.volume = volume;
                utter.lang = item.locale === 'fr' ? 'fr-FR' : item.locale === 'tw' ? 'ak-GH' : 'en-US';
                utter.onend = () => {
                    remaining -= 1;
                    if (remaining > 0) {
                        speakOnce();
                    } else {
                        finish();
                    }
                };
                utter.onerror = () => {
                    delete this.announcedIds[item.id];
                    finish();
                };

                window.speechSynthesis.speak(utter);
            };

            speakOnce();
        },

        async ackPlayed(id) {
            if (! this.playedUrlTemplate) {
                return;
            }

            const url = this.playedUrlTemplate.replace('__ID__', String(id));

            try {
                await fetch(url, {
                    method: 'POST',
                    headers: {
                        Accept: 'application/json',
                        'X-CSRF-TOKEN': this.csrf,
                    },
                });
            } catch (e) {
                console.error('Announcement ack failed', e);
                delete this.announcedIds[id];
            }
        },

        init() {
            this.poll();
            setInterval(() => this.poll(), this.pollMs);
        },
    }));

    Alpine.data('mobileTracker', (pollUrl) => ({
        data: null,
        ahead: 0,
        async poll() {
            try {
                const res = await fetch(pollUrl, { headers: { Accept: 'application/json' } });
                const json = await res.json();
                this.data = json.data;
                this.ahead = json.customers_ahead ?? 0;
            } catch (e) {
                console.error('Tracker poll failed', e);
            }
        },
        init() {
            this.poll();
            setInterval(() => this.poll(), 10000);
        },
    }));
}