// Main Alpine app state for the SOS Care Now dashboard.

const WEEKDAYS = ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"];

// Major US IANA timezones offered in the Settings dropdown.
const US_TIMEZONES = [
    { key: "America/New_York",     label: "Eastern — New York" },
    { key: "America/Chicago",      label: "Central — Chicago" },
    { key: "America/Denver",       label: "Mountain — Denver" },
    { key: "America/Phoenix",      label: "Arizona (no DST) — Phoenix" },
    { key: "America/Los_Angeles",  label: "Pacific — Los Angeles" },
    { key: "America/Anchorage",    label: "Alaska — Anchorage" },
    { key: "Pacific/Honolulu",     label: "Hawaii — Honolulu" },
];

const VISIT_LEVELS_FALLBACK = [
    { key: 1, label: "Level 1", duration_minutes: 45 },
    { key: 2, label: "Level 2", duration_minutes: 60 },
    { key: 3, label: "Level 3", duration_minutes: 90 },
    { key: "Nurse", label: "Nurse Visit", duration_minutes: 60 },
];

function generateTimeOptions() {
    // 08:00 → 23:45 in 15-minute steps. Late slots exist for on-call coverage.
    const out = [];
    for (let h = 8; h < 24; h++) {
        for (let m = 0; m < 60; m += 15) {
            out.push(`${String(h).padStart(2, "0")}:${String(m).padStart(2, "0")}`);
        }
    }
    return out;
}

// Return {year, month, day, hour, minute} for an instant, projected into `tz` (IANA name).
// Falls back to browser local if tz is missing or invalid.
function wallClockIn(instant, tz) {
    try {
        const parts = new Intl.DateTimeFormat("en-US", {
            timeZone: tz,
            year: "numeric", month: "2-digit", day: "2-digit",
            hour: "2-digit", minute: "2-digit", hour12: false,
        }).formatToParts(instant);
        const get = (t) => Number(parts.find(p => p.type === t).value);
        let hour = get("hour");
        if (hour === 24) hour = 0; // Intl quirk: hour12:false sometimes yields "24"
        return { year: get("year"), month: get("month"), day: get("day"), hour, minute: get("minute") };
    } catch (_) {
        return {
            year: instant.getFullYear(), month: instant.getMonth() + 1, day: instant.getDate(),
            hour: instant.getHours(), minute: instant.getMinutes(),
        };
    }
}

// Earliest valid "HH:MM" on `dateStr` that satisfies the configured lead time,
// computed in the platform timezone (so an Eastern user booking Chicago appointments
// sees the floor in Central time, not their browser's local time).
// Returns null if no time on that date works (caller should treat as "no valid options").
function minValidTimeForDate(dateStr, leadHours = 24, tz = null) {
    if (!dateStr) return "08:00";
    const minInstant = new Date(Date.now() + leadHours * 60 * 60 * 1000);
    const wc = wallClockIn(minInstant, tz);
    const [ty, tmo, td] = dateStr.split("-").map(Number);
    // Compare Y/M/D in the platform tz.
    const cmp = (ty - wc.year) || (tmo - wc.month) || (td - wc.day);
    if (cmp > 0) return "08:00";       // target date is after the min-lead day
    if (cmp < 0) return null;          // target date is before the min-lead day
    // Same day in the platform tz: round UP to next 15-minute slot.
    let h = wc.hour, m = wc.minute;
    const rem = m % 15;
    if (rem !== 0) m += 15 - rem;
    if (m === 60) { m = 0; h += 1; }
    if (h >= 24) return null; // past end-of-day window
    if (h < 8) { h = 8; m = 0; } // floor at 08:00
    return `${String(h).padStart(2, "0")}:${String(m).padStart(2, "0")}`;
}

function appState() {
    return {
        // --- Auth ---
        authenticated: false,
        userRole: null,         // "admin" | "provider"
        currentUser: "",
        providerId: null,
        loginMode: "admin",     // "admin" | "provider"
        loginForm: { username: "", password: "" },
        providerLoginForm: { name: "", password: "" },
        providerOptions: [],
        minLeadTimeHours: 24,   // overwritten by /api/schedule/config on init
        platformTimezone: null, // IANA tz (e.g. "America/Chicago") — overwritten by /api/schedule/config
        loginError: "",
        loginBusy: false,

        // --- Navigation ---
        view: "schedule", // schedule | providers | patients | appointments | calendar | audit | portal

        // --- Loading + toast ---
        toast: null,
        loading: false,

        // --- Data caches ---
        providers: [],
        patients: [],
        appointments: [],
        visitLevels: VISIT_LEVELS_FALLBACK,

        // --- Schedule view ---
        sched: {
            phase: "form", // form | matches | booked | error
            patientId: "",
            visitLevel: "1",
            address: "",
            preferredDate: "",
            timeStart: "09:00",
            timeEnd: "12:00",
            timeOptions: generateTimeOptions(),
            error: "",
            threadId: "",
            matches: [],
            selectedIdx: null,
            bookedAppt: null,
            notificationsSent: false,
        },

        // --- Cancel tab ---
        cancel: {
            patientFilter: "All",
            providerFilter: "All",
            selectedId: "",
        },
        scheduleTab: "new", // new | cancel

        // --- Appointments view (admin) ---
        apptView: {
            statusFilter: "All",     // All | scheduled | completed | cancelled
            patientFilter: "All",
            providerFilter: "All",
            list: [],
        },

        // --- Providers view ---
        prov: {
            showAdd: false,
            editingId: null,
            expandedId: null,           // id of the provider whose availability editor is open
            form: this ? null : null,   // placeholder
            confirmDelete: null,
            newOnCallDate: "",
            newBlockType: "All Day",
            newBlock: { title: "", date: "", start_time: "08:00", end_time: "12:00" },
        },
        provForm: {
            name: "", email: "", password: "", address: "", category: "provider",
            work_hours: { start: "08:00", end: "17:00" },
            lunch_break: { start: "12:00", end: "13:00" },
            service_levels: [1, 2, 3],
        },

        // --- Patients view ---
        pat: {
            showAdd: false,
            editingId: null,
            confirmDelete: null,
        },
        patForm: { name: "", email: "", address: "", notes: "" },

        // --- Calendar view ---
        cal: {
            selectedProviderIds: [],
            showUnavailable: true,
            showTravel: true,
            showOnCall: true,
            providerLegend: [],
            instance: null,
            selectedEvent: null,
        },

        // --- Audit log ---
        audit: { search: "", action: "All", entries: [], actionTypes: [] },

        // --- Settings ---
        sett: {
            current: null,
            defaults: null,
            form: null,
            saving: false,
        },

        // --- Provider portal ---
        portal: {
            self: null,
            tab: "availability", // availability | schedule
            editForm: { email: "", address: "", work_hours: { start: "08:00", end: "17:00" }, lunch_break: { start: "12:00", end: "13:00" }, recurring_days_off: [] },
            newBlockType: "All Day",
            newBlock: { title: "", date: "", start_time: "08:00", end_time: "12:00" },
            newOnCallDate: "",
            calendar: null,
            selectedEvent: null,
        },

        // ============================================================
        // INIT
        // ============================================================
        async init() {
            this.sched.preferredDate = fmt.tomorrow();
            this.prov.newBlock.date = fmt.tomorrow();
            this.prov.newOnCallDate = fmt.today();
            this.portal.newBlock.date = fmt.tomorrow();
            this.portal.newOnCallDate = fmt.today();

            await this.loadSchedulingConfig();
            await this.refreshAuth();
            if (!this.authenticated) {
                await this.loadProviderOptions();
            } else {
                await this.afterLogin();
            }

            this.$watch("view", (v) => this.onViewChange(v));
            this.$watch("sched.preferredDate", () => this.enforceLeadTime());
            // Snap to first valid slot on the initial (tomorrow) default.
            this.enforceLeadTime();
        },

        // Restrict sched.timeStart/timeEnd to slots that respect the configured lead time.
        // Called on init and whenever the preferred date changes.
        get validStartTimes() {
            const minT = minValidTimeForDate(this.sched.preferredDate, this.minLeadTimeHours, this.platformTimezone);
            if (!minT) return [];
            return this.sched.timeOptions.filter(t => t >= minT);
        },
        // Earliest selectable date given the current lead time. Tries today first, then tomorrow.
        get minSelectableDate() {
            const today = fmt.today();
            if (minValidTimeForDate(today, this.minLeadTimeHours, this.platformTimezone)) return today;
            return fmt.tomorrow();
        },
        // Latest Start is NOT constrained by lead time — just must be >= timeStart.
        // This lets users widen the window into the evening (on-call still respects lead time per-slot).
        get validEndTimes() {
            const start = this.sched.timeStart;
            if (!start) return [];
            return this.sched.timeOptions.filter(t => t >= start);
        },
        // Friendly label for the platform timezone, e.g. "Central — Chicago" for "America/Chicago".
        // Falls back to the raw IANA name if not in the known list.
        get platformTimezoneLabel() {
            if (!this.platformTimezone) return "";
            const match = US_TIMEZONES.find(t => t.key === this.platformTimezone);
            return match ? match.label : this.platformTimezone;
        },
        // "Now" represented as a Date whose local-time fields equal the current wall-clock
        // in the platform timezone. FullCalendar (with default timeZone:"local") then places
        // the now-indicator at the correct slot for an Eastern user viewing Chicago times.
        platformNow() {
            const tz = this.platformTimezone;
            if (!tz) return new Date();
            const wc = wallClockIn(new Date(), tz);
            return new Date(wc.year, wc.month - 1, wc.day, wc.hour, wc.minute);
        },
        enforceLeadTime() {
            const valid = this.validStartTimes;
            if (valid.length === 0) {
                this.sched.timeStart = "";
                this.sched.timeEnd = "";
                return;
            }
            if (!valid.includes(this.sched.timeStart)) this.sched.timeStart = valid[0];
            const endValid = this.sched.timeOptions.filter(t => t >= this.sched.timeStart);
            if (!endValid.includes(this.sched.timeEnd) || this.sched.timeEnd < this.sched.timeStart) {
                // Default end = 3 hours after start (12 slots) or last available
                const endIdx = Math.min(12, endValid.length - 1);
                this.sched.timeEnd = endValid[endIdx];
            }
        },

        async refreshAuth() {
            try {
                const me = await API.get("/api/auth/me");
                if (me.authenticated) {
                    this.authenticated = true;
                    this.userRole = me.user_role;
                    this.currentUser = me.current_user;
                    this.providerId = me.provider_id || null;
                }
            } catch (e) { /* not logged in */ }
        },

        async loadProviderOptions() {
            try { this.providerOptions = await API.get("/api/auth/provider-names"); }
            catch (e) { this.providerOptions = []; }
        },

        async loadSchedulingConfig() {
            try {
                const cfg = await API.get("/api/schedule/config");
                if (cfg && typeof cfg.min_lead_time_hours === "number") {
                    this.minLeadTimeHours = cfg.min_lead_time_hours;
                }
                if (cfg && typeof cfg.timezone === "string" && cfg.timezone) {
                    this.platformTimezone = cfg.timezone;
                }
            } catch (e) { /* keep defaults */ }
        },

        async afterLogin() {
            // Pick a default view per role
            if (this.userRole === "provider") {
                this.view = "portal";
                await this.loadPortal();
            } else {
                this.view = "schedule";
                await this.loadVisitLevels();
                await this.loadPatients();
            }
        },

        // ============================================================
        // LOGIN
        // ============================================================
        async submitLogin() {
            this.loginError = "";
            this.loginBusy = true;
            try {
                if (this.loginMode === "admin") {
                    const res = await API.post("/api/auth/login", this.loginForm);
                    this.authenticated = true;
                    this.userRole = res.user_role;
                    this.currentUser = res.current_user;
                    this.providerId = null;
                } else {
                    const res = await API.post("/api/auth/provider-login", this.providerLoginForm);
                    this.authenticated = true;
                    this.userRole = res.user_role;
                    this.currentUser = res.current_user;
                    this.providerId = res.provider_id;
                }
                await this.afterLogin();
            } catch (e) {
                this.loginError = e.message || "Login failed";
            } finally {
                this.loginBusy = false;
            }
        },

        async logout() {
            try { await API.post("/api/auth/logout"); } catch (e) {}
            this.authenticated = false;
            this.userRole = null;
            this.currentUser = "";
            this.providerId = null;
            this.loginForm = { username: "", password: "" };
            this.providerLoginForm = { name: "", password: "" };
            await this.loadProviderOptions();
        },

        // ============================================================
        // VIEW NAVIGATION
        // ============================================================
        async onViewChange(v) {
            // Destroy any existing calendar instance
            if (this.cal.instance) { this.cal.instance.destroy(); this.cal.instance = null; }
            if (this.portal.calendar) { this.portal.calendar.destroy(); this.portal.calendar = null; }

            if (v === "schedule")  { await this.loadVisitLevels(); await this.loadPatients(); }
            if (v === "providers") { await this.loadProviders(); }
            if (v === "patients")  { await this.loadPatients(); }
            if (v === "appointments") { await this.loadAppointmentsList(); await this.loadProviders(); await this.loadPatients(); }
            if (v === "calendar")  { await this.loadProviders(); await this.$nextTick(); this.mountCalendar(); }
            if (v === "audit")     { await this.loadAudit(); }
            if (v === "portal")    { await this.loadPortal(); }
            if (v === "settings")  { await this.loadSettings(); }
        },

        // ============================================================
        // SETTINGS
        // ============================================================
        async loadSettings() {
            try {
                const res = await API.get("/api/settings");
                this.sett.current = res.current;
                this.sett.defaults = res.defaults;
                // Build editable form (deep-copy to avoid mutating .current until save)
                this.sett.form = JSON.parse(JSON.stringify(res.current));
            } catch (e) {
                this.showToast(e.message, "error");
            }
        },

        get timezoneOptions() {
            // Surface the saved value even if it's not in the standard US list.
            const current = this.sett.form && this.sett.form.timezone;
            const standardKeys = US_TIMEZONES.map(t => t.key);
            if (current && !standardKeys.includes(current)) {
                return [{ key: current, label: `${current} (current)` }, ...US_TIMEZONES];
            }
            return US_TIMEZONES;
        },

        get visitLevelEntries() {
            // Return [{key, label, duration_minutes}, ...] for stable iteration in the template.
            if (!this.sett.form || !this.sett.form.visit_levels) return [];
            return Object.entries(this.sett.form.visit_levels).map(([k, v]) => ({
                key: k,
                label: v.label || k,
                duration_minutes: v.duration_minutes,
            }));
        },

        updateVisitLevelDuration(key, value) {
            const n = parseInt(value);
            if (isNaN(n)) return;
            this.sett.form.visit_levels[key].duration_minutes = n;
        },

        async saveSettings() {
            if (this.sett.saving) return;
            this.sett.saving = true;
            try {
                const res = await API.put("/api/settings", this.sett.form);
                this.sett.current = res.current;
                this.sett.form = JSON.parse(JSON.stringify(res.current));
                // Refresh the schedule view's visit-level dropdown so changes are visible immediately.
                this.visitLevels = Object.entries(res.current.visit_levels).map(([k, v]) => ({
                    key: (isNaN(parseInt(k)) ? k : parseInt(k)),
                    label: v.label,
                    duration_minutes: v.duration_minutes,
                }));
                if (typeof res.current.min_lead_time_hours === "number") {
                    this.minLeadTimeHours = res.current.min_lead_time_hours;
                    this.enforceLeadTime();
                }
                if (res.changes.length === 0) {
                    this.showToast("No changes to save.", "info");
                } else {
                    this.showToast(`Saved ${res.changes.length} change(s).`, "success");
                }
            } catch (e) {
                this.showToast(e.message, "error");
            } finally {
                this.sett.saving = false;
            }
        },

        async resetSettings() {
            if (!confirm("Reset ALL settings to defaults? This cannot be undone.")) return;
            try {
                const res = await API.post("/api/settings/reset");
                this.sett.current = res.current;
                this.sett.form = JSON.parse(JSON.stringify(res.current));
                this.showToast("Settings reset to defaults.", "success");
            } catch (e) {
                this.showToast(e.message, "error");
            }
        },

        // ============================================================
        // TOAST
        // ============================================================
        showToast(msg, type = "info") {
            this.toast = { msg, type };
            setTimeout(() => { if (this.toast && this.toast.msg === msg) this.toast = null; }, 3500);
        },

        // ============================================================
        // DATA LOADERS
        // ============================================================
        async loadVisitLevels() {
            try { this.visitLevels = await API.get("/api/schedule/visit-levels"); }
            catch (e) { /* keep fallback */ }
        },

        async loadProviders() {
            try { this.providers = await API.get("/api/providers?active_only=false"); }
            catch (e) { this.showToast(e.message, "error"); }
        },

        async loadPatients() {
            try { this.patients = await API.get("/api/patients"); }
            catch (e) { this.showToast(e.message, "error"); }
        },

        // ============================================================
        // SCHEDULE — find matches & book
        // ============================================================
        get selectedPatient() {
            return this.patients.find(p => p.id === this.sched.patientId);
        },

        onPatientChange() {
            const p = this.selectedPatient;
            if (p) this.sched.address = p.address || "";
        },

        async findMatches() {
            if (!this.sched.patientId) { this.showToast("Select a patient", "error"); return; }
            if (!this.sched.address) { this.showToast("Address required", "error"); return; }
            if (!this.sched.timeStart || !this.sched.timeEnd) {
                this.showToast(`No appointment times on this date meet the ${this.minLeadTimeHours}-hour lead time. Pick a later date.`, "error");
                return;
            }
            this.loading = true;
            this.sched.error = "";
            try {
                const vl = isNaN(parseInt(this.sched.visitLevel)) ? this.sched.visitLevel : parseInt(this.sched.visitLevel);
                const res = await API.post("/api/schedule/find-matches", {
                    patient_id: this.sched.patientId,
                    visit_level: vl,
                    visit_address: this.sched.address,
                    preferred_dates: [this.sched.preferredDate],
                    preferred_time_window: { start: this.sched.timeStart, end: this.sched.timeEnd },
                });
                if (res.error) {
                    this.sched.error = res.error;
                    this.sched.phase = "error";
                } else if ((res.ranked_matches || []).length === 0) {
                    this.sched.error = "No matches found. Try different dates or times.";
                    this.sched.phase = "error";
                } else {
                    this.sched.threadId = res.thread_id;
                    this.sched.matches = res.ranked_matches;
                    this.sched.selectedIdx = null;
                    this.sched.phase = "matches";
                }
            } catch (e) {
                this.sched.error = e.message;
                this.sched.phase = "error";
            } finally {
                this.loading = false;
            }
        },

        get groupedMatches() {
            // Group ranked matches by provider, preserving rank order.
            const groups = [];
            const seen = {};
            this.sched.matches.forEach((m, idx) => {
                if (!(m.provider_id in seen)) {
                    seen[m.provider_id] = { provider_id: m.provider_id, name: m.provider_name, min_travel: m.travel_time_minutes, is_oncall: !!m.is_oncall, slots: [] };
                    groups.push(seen[m.provider_id]);
                } else {
                    seen[m.provider_id].is_oncall = seen[m.provider_id].is_oncall || !!m.is_oncall;
                }
                seen[m.provider_id].slots.push({ idx, ...m });
            });
            return groups;
        },

        selectSlot(idx) {
            this.sched.selectedIdx = idx;
        },

        async bookAppointment() {
            if (this.sched.selectedIdx === null) return;
            this.loading = true;
            try {
                const res = await API.post("/api/schedule/book", {
                    thread_id: this.sched.threadId,
                    selection_index: this.sched.selectedIdx,
                });
                if (res.error) {
                    this.sched.error = res.error;
                    this.sched.phase = "error";
                } else {
                    this.sched.bookedAppt = res.booked_appointment;
                    this.sched.notificationsSent = res.notifications_sent;
                    this.sched.phase = "booked";
                }
            } catch (e) {
                this.sched.error = e.message;
                this.sched.phase = "error";
            } finally {
                this.loading = false;
            }
        },

        startOver() {
            this.sched.phase = "form";
            this.sched.error = "";
            this.sched.matches = [];
            this.sched.selectedIdx = null;
            this.sched.bookedAppt = null;
        },

        // Like startOver(), but keeps the form inputs so the user can tweak and re-submit.
        backToForm() {
            this.sched.phase = "form";
            this.sched.error = "";
            this.sched.matches = [];
            this.sched.selectedIdx = null;
        },

        get matchesCount() {
            return this.sched.matches.length;
        },

        // ============================================================
        // CANCEL APPOINTMENT (admin)
        // ============================================================
        async loadFutureAppointments() {
            const all = await API.get("/api/appointments?status=scheduled");
            const today = fmt.today();
            this.appointments = all.filter(a => a.date >= today);
        },

        async openCancelTab() {
            this.scheduleTab = "cancel";
            await this.loadFutureAppointments();
            await this.loadProviders();
            await this.loadPatients();
        },

        get filteredCancelAppts() {
            let list = [...this.appointments];
            if (this.cancel.patientFilter !== "All") {
                const pid = (this.patients.find(p => p.name === this.cancel.patientFilter) || {}).id;
                if (pid) list = list.filter(a => a.patient_id === pid);
            }
            if (this.cancel.providerFilter !== "All") {
                const pid = (this.providers.find(p => p.name === this.cancel.providerFilter) || {}).id;
                if (pid) list = list.filter(a => a.provider_id === pid);
            }
            return list;
        },

        async cancelAppointment() {
            if (!this.cancel.selectedId) { this.showToast("Select an appointment", "error"); return; }
            if (!confirm("Cancel this appointment? Calendar event and notifications will be sent.")) return;
            this.loading = true;
            try {
                await API.del(`/api/appointments/${this.cancel.selectedId}`);
                this.showToast("Appointment cancelled", "success");
                this.cancel.selectedId = "";
                await this.loadFutureAppointments();
            } catch (e) {
                this.showToast(e.message, "error");
            } finally {
                this.loading = false;
            }
        },

        // ============================================================
        // APPOINTMENTS view (admin)
        // ============================================================
        async loadAppointmentsList() {
            this.apptView.list = await API.get("/api/appointments");
        },

        get filteredAppointmentsList() {
            let list = [...this.apptView.list];
            if (this.apptView.statusFilter !== "All") {
                list = list.filter(a => (a.status || "scheduled") === this.apptView.statusFilter);
            }
            if (this.apptView.patientFilter !== "All") {
                const pid = (this.patients.find(p => p.name === this.apptView.patientFilter) || {}).id;
                if (pid) list = list.filter(a => a.patient_id === pid);
            }
            if (this.apptView.providerFilter !== "All") {
                const pid = (this.providers.find(p => p.name === this.apptView.providerFilter) || {}).id;
                if (pid) list = list.filter(a => a.provider_id === pid);
            }
            // Sort: upcoming first (date+time ascending), then completed/cancelled at the bottom.
            const today = fmt.today();
            list.sort((a, b) => {
                const akey = (a.date || "") + "T" + (a.start_time || "");
                const bkey = (b.date || "") + "T" + (b.start_time || "");
                const aFuture = (a.date || "") >= today && (a.status || "scheduled") === "scheduled";
                const bFuture = (b.date || "") >= today && (b.status || "scheduled") === "scheduled";
                if (aFuture !== bFuture) return aFuture ? -1 : 1;
                return akey.localeCompare(bkey);
            });
            return list;
        },

        statusBadgeClass(status) {
            const s = status || "scheduled";
            if (s === "completed") return "badge badge-emerald";
            if (s === "cancelled") return "badge badge-red";
            return "badge badge-blue";
        },

        // True when the appointment's start time has passed in the platform timezone.
        // Used to enable/disable the "Mark Complete" button for providers.
        canCompleteAppointment(a) {
            if (!a || (a.status && a.status !== "scheduled")) return false;
            if (!a.date || !a.start_time) return false;
            const now = this.platformNow();
            const [y, mo, d] = a.date.split("-").map(Number);
            const [h, mi] = a.start_time.split(":").map(Number);
            const startLocal = new Date(y, mo - 1, d, h, mi);
            return now >= startLocal;
        },

        async markAppointmentComplete(appointmentId) {
            if (!appointmentId) return;
            this.loading = true;
            try {
                await API.post(`/api/appointments/${appointmentId}/complete`, {});
                this.showToast("Marked complete", "success");
                // Refresh whichever view we're on
                if (this.view === "portal" && this.portal.calendar) this.portal.calendar.refetchEvents();
                if (this.view === "appointments") await this.loadAppointmentsList();
                this.portal.selectedEvent = null;
            } catch (e) {
                this.showToast(e.message, "error");
            } finally {
                this.loading = false;
            }
        },

        // ============================================================
        // PROVIDERS view
        // ============================================================
        openAddProvider() {
            this.prov.editingId = null;
            this.provForm = {
                name: "", email: "", password: "", address: "", category: "provider",
                work_hours: { start: "08:00", end: "17:00" },
                lunch_break: { start: "12:00", end: "13:00" },
                service_levels: [1, 2, 3],
            };
            this.prov.showAdd = true;
        },

        openEditProvider(p) {
            this.prov.editingId = p.id;
            this.provForm = {
                name: p.name || "",
                email: p.email || "",
                password: p.password || "",
                address: p.address || "",
                category: p.category || "provider",
                work_hours: { ...(p.work_hours || { start: "08:00", end: "17:00" }) },
                lunch_break: { ...(p.lunch_break || { start: "12:00", end: "13:00" }) },
                service_levels: [...(p.service_levels || [])],
            };
            this.prov.showAdd = true;
        },

        toggleServiceLevel(level) {
            const idx = this.provForm.service_levels.findIndex(x => x == level);
            if (idx >= 0) this.provForm.service_levels.splice(idx, 1);
            else this.provForm.service_levels.push(level);
        },

        async saveProvider() {
            this.loading = true;
            try {
                if (this.prov.editingId) {
                    await API.put(`/api/providers/${this.prov.editingId}`, this.provForm);
                    this.showToast("Provider updated", "success");
                } else {
                    await API.post("/api/providers", this.provForm);
                    this.showToast("Provider added", "success");
                }
                this.prov.showAdd = false;
                await this.loadProviders();
            } catch (e) {
                this.showToast(e.message, "error");
            } finally {
                this.loading = false;
            }
        },

        async deleteProvider(id) {
            try {
                await API.del(`/api/providers/${id}`);
                this.showToast("Provider deleted", "success");
                this.prov.confirmDelete = null;
                await this.loadProviders();
            } catch (e) {
                this.showToast(e.message, "error");
            }
        },

        async saveRecurringDaysOff(provider) {
            try {
                await API.put(`/api/providers/${provider.id}/recurring-days-off`, { recurring_days_off: provider.recurring_days_off || [] });
                this.showToast("Standing days off updated", "success");
                await this.loadProviders();
            } catch (e) {
                this.showToast(e.message, "error");
            }
        },

        toggleRecurringDay(provider, day) {
            const list = provider.recurring_days_off || [];
            const idx = list.indexOf(day);
            if (idx >= 0) list.splice(idx, 1);
            else list.push(day);
            provider.recurring_days_off = list;
        },

        async addBlock(provider) {
            const b = this.prov.newBlock;
            const payload = {
                date: b.date,
                all_day: this.prov.newBlockType === "All Day",
                start_time: this.prov.newBlockType === "Specific Time" ? b.start_time : null,
                end_time: this.prov.newBlockType === "Specific Time" ? b.end_time : null,
                title: b.title || "Unavailable",
            };
            try {
                await API.post(`/api/providers/${provider.id}/days-off`, payload);
                this.showToast("Unavailable block added", "success");
                this.prov.newBlock = { title: "", date: b.date, start_time: "08:00", end_time: "12:00" };
                await this.loadProviders();
            } catch (e) {
                this.showToast(e.message, "error");
            }
        },

        async removeBlock(providerId, index) {
            try {
                await API.del(`/api/providers/${providerId}/days-off/${index}`);
                this.showToast("Block removed", "success");
                await this.loadProviders();
            } catch (e) {
                this.showToast(e.message, "error");
            }
        },

        async addOnCall(provider) {
            if (!this.prov.newOnCallDate) return;
            try {
                await API.post(`/api/providers/${provider.id}/on-call`, { date: this.prov.newOnCallDate });
                this.showToast("On-call day added", "success");
                await this.loadProviders();
            } catch (e) {
                this.showToast(e.message, "error");
            }
        },

        async toggleOnCallDate(provider, date) {
            const isOn = (provider.on_call || []).includes(date);
            try {
                await API.post(`/api/providers/${provider.id}/on-call/toggle`, { date, on_call: !isOn });
                this.showToast(isOn ? "On-call removed" : "On-call set", "success");
                await this.loadProviders();
            } catch (e) {
                this.showToast(e.message, "error");
            }
        },

        async removeOnCall(providerId, date) {
            try {
                await API.del(`/api/providers/${providerId}/on-call/${date}`);
                this.showToast("On-call day removed", "success");
                await this.loadProviders();
            } catch (e) {
                this.showToast(e.message, "error");
            }
        },

        formatBlock(off) {
            if (typeof off === "string") return `${off} — All Day`;
            if (off.all_day) return `${off.date} — All Day — ${off.title || "Unavailable"}`;
            return `${off.date} ${off.start_time}–${off.end_time} — ${off.title || "Unavailable"}`;
        },

        // Compact summary like "May 30" (all day) or "May 30 9:00 AM–12:00 PM".
        formatBlockShort(off) {
            if (typeof off === "string") return fmt.dateShort(off);
            const d = fmt.dateShort(off.date);
            if (off.all_day) return d;
            return `${d} ${fmt.time(off.start_time)}–${fmt.time(off.end_time)}`;
        },

        // Returns {block, originalIndex} pairs for blocks whose date is today or later.
        // Preserves original index so removeBlock still targets the right sheet row.
        upcomingBlocks(provider) {
            const today = fmt.today();
            const out = [];
            (provider.days_off || []).forEach((off, i) => {
                const d = typeof off === "string" ? off : off?.date;
                if (d && d >= today) out.push({ block: off, originalIndex: i });
            });
            return out;
        },

        // ============================================================
        // PATIENTS view
        // ============================================================
        openAddPatient() {
            this.pat.editingId = null;
            this.patForm = { name: "", email: "", address: "", notes: "" };
            this.pat.showAdd = true;
        },

        openEditPatient(p) {
            this.pat.editingId = p.id;
            this.patForm = { name: p.name || "", email: p.email || "", address: p.address || "", notes: p.notes || "" };
            this.pat.showAdd = true;
        },

        async savePatient() {
            this.loading = true;
            try {
                if (this.pat.editingId) {
                    await API.put(`/api/patients/${this.pat.editingId}`, this.patForm);
                    this.showToast("Patient updated", "success");
                } else {
                    await API.post("/api/patients", this.patForm);
                    this.showToast("Patient added", "success");
                }
                this.pat.showAdd = false;
                await this.loadPatients();
            } catch (e) {
                this.showToast(e.message, "error");
            } finally {
                this.loading = false;
            }
        },

        async deletePatient(id) {
            try {
                await API.del(`/api/patients/${id}`);
                this.showToast("Patient deleted", "success");
                this.pat.confirmDelete = null;
                await this.loadPatients();
            } catch (e) {
                this.showToast(e.message, "error");
            }
        },

        // ============================================================
        // CALENDAR view
        // ============================================================
        async mountCalendar() {
            const el = document.getElementById("calendar-root");
            if (!el || typeof FullCalendar === "undefined") return;
            this.cal.providerLegend = this.providers.map(p => ({ id: p.id, name: p.name }));
            if (this.cal.selectedProviderIds.length === 0) {
                this.cal.selectedProviderIds = this.providers.map(p => p.id);
            }
            this.cal.instance = new FullCalendar.Calendar(el, {
                initialView: "timeGridWeek",
                headerToolbar: { left: "prev,next today", center: "title", right: "dayGridMonth,timeGridWeek,timeGridDay,listWeek" },
                height: 720,
                slotMinTime: "00:00:00",
                slotMaxTime: "24:00:00",
                scrollTime: "07:00:00",
                nowIndicator: true,
                now: () => this.platformNow(),
                events: (info, success, failure) => this.fetchCalEvents(info, success, failure),
                eventClick: (info) => {
                    const p = info.event.extendedProps;
                    if (p.type === "appointment" || p.type === "days_off" || p.type === "on_call") {
                        this.cal.selectedEvent = { ...p, eventStart: info.event.start, eventEnd: info.event.end, title: info.event.title };
                    }
                },
            });
            this.cal.instance.render();
        },

        async fetchCalEvents(info, success, failure) {
            try {
                const params = new URLSearchParams({
                    start: info.startStr,
                    end: info.endStr,
                    show_unavailable: this.cal.showUnavailable ? "true" : "false",
                    show_travel: this.cal.showTravel ? "true" : "false",
                    show_oncall: this.cal.showOnCall ? "true" : "false",
                });
                if (this.cal.selectedProviderIds.length) params.set("provider_ids", this.cal.selectedProviderIds.join(","));
                const res = await API.get(`/api/calendar/events?${params.toString()}`);
                this.cal.providerLegend = res.providers || [];
                success(res.events || []);
            } catch (e) {
                failure(e);
                this.showToast(e.message, "error");
            }
        },

        toggleCalProvider(id) {
            const i = this.cal.selectedProviderIds.indexOf(id);
            if (i >= 0) this.cal.selectedProviderIds.splice(i, 1);
            else this.cal.selectedProviderIds.push(id);
            if (this.cal.instance) this.cal.instance.refetchEvents();
        },

        toggleAllProviders() {
            if (this.cal.selectedProviderIds.length === this.providers.length) {
                this.cal.selectedProviderIds = [];
            } else {
                this.cal.selectedProviderIds = this.providers.map(p => p.id);
            }
            if (this.cal.instance) this.cal.instance.refetchEvents();
        },

        refetchCalendar() {
            if (this.cal.instance) this.cal.instance.refetchEvents();
        },

        // ============================================================
        // AUDIT
        // ============================================================
        async loadAudit() {
            try {
                this.audit.actionTypes = await API.get("/api/audit/actions");
            } catch (e) {}
            await this.refreshAudit();
        },

        async refreshAudit() {
            try {
                const params = new URLSearchParams();
                if (this.audit.search) params.set("search", this.audit.search);
                if (this.audit.action && this.audit.action !== "All") params.set("action", this.audit.action);
                this.audit.entries = await API.get(`/api/audit?${params.toString()}`);
            } catch (e) {
                this.showToast(e.message, "error");
            }
        },

        // ============================================================
        // PROVIDER PORTAL
        // ============================================================
        async loadPortal() {
            if (!this.providerId) return;
            try {
                this.portal.self = await API.get(`/api/providers/${this.providerId}`);
                this.portal.editForm = {
                    email: this.portal.self.email || "",
                    address: this.portal.self.address || "",
                    work_hours: { ...(this.portal.self.work_hours || { start: "08:00", end: "17:00" }) },
                    lunch_break: { ...(this.portal.self.lunch_break || { start: "12:00", end: "13:00" }) },
                    recurring_days_off: [...(this.portal.self.recurring_days_off || [])],
                };
                if (this.portal.tab === "schedule") {
                    await this.$nextTick();
                    this.mountPortalCalendar();
                }
            } catch (e) {
                this.showToast(e.message, "error");
            }
        },

        async savePortalProfile() {
            if (!this.providerId) return;
            try {
                await API.put(`/api/providers/${this.providerId}`, {
                    email: this.portal.editForm.email,
                    address: this.portal.editForm.address,
                    work_hours: this.portal.editForm.work_hours,
                    lunch_break: this.portal.editForm.lunch_break,
                });
                this.showToast("Profile updated", "success");
                await this.loadPortal();
            } catch (e) {
                this.showToast(e.message, "error");
            }
        },

        togglePortalRecurringDay(day) {
            const list = this.portal.editForm.recurring_days_off;
            const i = list.indexOf(day);
            if (i >= 0) list.splice(i, 1);
            else list.push(day);
        },

        async savePortalRecurring() {
            try {
                await API.put(`/api/providers/${this.providerId}/recurring-days-off`, { recurring_days_off: this.portal.editForm.recurring_days_off });
                this.showToast("Standing days off updated", "success");
                await this.loadPortal();
            } catch (e) {
                this.showToast(e.message, "error");
            }
        },

        async addPortalBlock() {
            const b = this.portal.newBlock;
            const payload = {
                date: b.date,
                all_day: this.portal.newBlockType === "All Day",
                start_time: this.portal.newBlockType === "Specific Time" ? b.start_time : null,
                end_time: this.portal.newBlockType === "Specific Time" ? b.end_time : null,
                title: b.title || "Unavailable",
            };
            try {
                await API.post(`/api/providers/${this.providerId}/days-off`, payload);
                this.showToast("Block added", "success");
                this.portal.newBlock = { title: "", date: b.date, start_time: "08:00", end_time: "12:00" };
                await this.loadPortal();
            } catch (e) {
                this.showToast(e.message, "error");
            }
        },

        async removePortalBlock(index) {
            try {
                await API.del(`/api/providers/${this.providerId}/days-off/${index}`);
                this.showToast("Block removed", "success");
                await this.loadPortal();
            } catch (e) {
                this.showToast(e.message, "error");
            }
        },

        async addPortalOnCall() {
            if (!this.portal.newOnCallDate) return;
            try {
                await API.post(`/api/providers/${this.providerId}/on-call`, { date: this.portal.newOnCallDate });
                this.showToast("On-call day added", "success");
                await this.loadPortal();
            } catch (e) {
                this.showToast(e.message, "error");
            }
        },

        async togglePortalOnCall(date) {
            const isOn = (this.portal.self?.on_call || []).includes(date);
            try {
                await API.post(`/api/providers/${this.providerId}/on-call/toggle`, { date, on_call: !isOn });
                this.showToast(isOn ? "On-call removed" : "On-call set", "success");
                await this.loadPortal();
            } catch (e) {
                this.showToast(e.message, "error");
            }
        },

        async removePortalOnCall(date) {
            try {
                await API.del(`/api/providers/${this.providerId}/on-call/${date}`);
                this.showToast("Removed", "success");
                await this.loadPortal();
            } catch (e) {
                this.showToast(e.message, "error");
            }
        },

        async switchPortalTab(tab) {
            this.portal.tab = tab;
            if (this.portal.calendar) { this.portal.calendar.destroy(); this.portal.calendar = null; }
            if (tab === "schedule") {
                await this.$nextTick();
                this.mountPortalCalendar();
            }
        },

        mountPortalCalendar() {
            const el = document.getElementById("portal-calendar-root");
            if (!el || typeof FullCalendar === "undefined") return;
            this.portal.calendar = new FullCalendar.Calendar(el, {
                initialView: "timeGridWeek",
                headerToolbar: { left: "prev,next today", center: "title", right: "dayGridMonth,timeGridWeek,timeGridDay,listWeek" },
                height: 720,
                slotMinTime: "00:00:00",
                slotMaxTime: "24:00:00",
                scrollTime: "07:00:00",
                nowIndicator: true,
                now: () => this.platformNow(),
                events: async (info, success, failure) => {
                    try {
                        const params = new URLSearchParams({ start: info.startStr, end: info.endStr, show_unavailable: "true", show_travel: "true" });
                        const res = await API.get(`/api/calendar/events?${params.toString()}`);
                        success(res.events || []);
                    } catch (e) { failure(e); }
                },
                eventClick: (info) => {
                    const p = info.event.extendedProps;
                    this.portal.selectedEvent = { ...p, eventStart: info.event.start, eventEnd: info.event.end, title: info.event.title };
                },
            });
            this.portal.calendar.render();
        },

        formatTime: (t) => fmt.time(t),
        formatDate: (d) => fmt.date(d),
        formatDateShort: (d) => fmt.dateShort(d),
        formatTs(ts) {
            if (!ts) return "";
            const d = new Date(ts);
            return d.toLocaleString();
        },
    };
}

window.appState = appState;