import {
    ArchiveBoxIcon,
    ArrowLeftOnRectangleIcon,
    ArrowsRightLeftIcon,
    BanknotesIcon,
    BuildingOffice2Icon,
    CalendarDaysIcon,
    ChartBarIcon,
    ChatBubbleLeftEllipsisIcon,
    ChevronDownIcon,
    ClipboardDocumentCheckIcon,
    Cog6ToothIcon,
    CreditCardIcon,
    DevicePhoneMobileIcon,
    DocumentTextIcon,
    FolderOpenIcon,
    HeartIcon,
    KeyIcon,
    LockClosedIcon,
    PlusIcon,
    ShieldCheckIcon,
    StarIcon,
    TagIcon,
    UserCircleIcon,
    UserGroupIcon,
    UsersIcon,
    WrenchScrewdriverIcon,
} from "@heroicons/react/24/outline";
import { useState } from "react";
import { NavLink, useLocation, useNavigate } from "react-router-dom";
import { useSubscription } from "../../hooks/useSubscription";
import { usePermissions } from "../../hooks/usePermissions";
import { useAuthStore } from "../../stores/authStore";
import { useUiStore } from "../../stores/uiStore";

type SubItem = { to: string; label: string; icon?: React.ElementType };
type SectionItem = {
    to: string;
    icon: React.ElementType;
    label: string;
    feature?: string;
    /** وقتی مقدار داشته باشد، آیتم به یک منوی بازشونده تبدیل می‌شود. */
    children?: SubItem[];
};
type Section = { label: string; items: SectionItem[] };

/** زیرمنوهای مشترکِ «نوبت‌ها» (نوبت‌های تأییدشده + افزودن نوبت). */
const APPOINTMENTS_CHILDREN: SubItem[] = [
    { to: "/admin/appointments", label: "نوبت ها", icon: CalendarDaysIcon },
    { to: "/admin/appointments/new", label: "افزودن نوبت", icon: PlusIcon },
];

/**
 * همان زیرمنوها + «رزرو نوبت». برای نقش‌هایی که مالک برنامهٔ نوبت‌دهی‌اند
 * (ادمین/کلینیک/پزشک) تا همهٔ عملیات نوبت زیر یک بخش جمع شود. پزشکِ مهمانِ کلینیک
 * از نسخهٔ بدون رزرو (`APPOINTMENTS_CHILDREN`) استفاده می‌کند.
 */
const APPOINTMENTS_CHILDREN_WITH_RESERVE: SubItem[] = [
    ...APPOINTMENTS_CHILDREN,
    { to: "/admin/appointments/reserve", label: "رزرو نوبت", icon: ArchiveBoxIcon },
];

function buildSections(
    primaryRole: string | null,
    dbUuid: string | null,
    scope: string | null,
    can: (resource: string, action: string) => boolean,
): Section[] {
    // پزشکِ مهمان در محیط کلینیک (scope=clinic): منو از روی مجوزهایی که کلینیک
    // برایش تعیین کرده ساخته می‌شود، نه به‌صورت hardcode.
    if (primaryRole === "doctor" && scope === "clinic") {
        const items: SectionItem[] = [
            { to: "/admin/dashboard", icon: ChartBarIcon, label: "داشبورد" },
        ];
        if (can("appointments", "view")) {
            items.push({
                to: "/admin/appointments",
                icon: CalendarDaysIcon,
                label: "نوبت‌های من",
                children: APPOINTMENTS_CHILDREN,
            });
        }
        if (can("patients", "view")) {
            items.push({
                to: "/admin/patients",
                icon: FolderOpenIcon,
                label: "پرونده بیماران",
                feature: "patient_records",
            });
        }

        return [{ label: "عمومی", items }];
    }

    if (primaryRole === "admin") {
        return [
            {
                label: "عمومی",
                items: [
                    {
                        to: "/admin/dashboard",
                        icon: ChartBarIcon,
                        label: "داشبورد",
                    },
                    {
                        to: "/admin/users",
                        icon: UserGroupIcon,
                        label: "کاربران",
                    },
                    { to: "/admin/doctors", icon: HeartIcon, label: "پزشکان" },
                    {
                        to: "/admin/doctor-claims",
                        icon: HeartIcon,
                        label: "تصاحب پروفایل",
                    },
                    {
                        to: "/admin/clinics",
                        icon: BuildingOffice2Icon,
                        label: "کلینیک‌ها",
                    },
                ],
            },
            {
                label: "مدیریت",
                items: [
                    {
                        to: "/admin/appointments",
                        icon: CalendarDaysIcon,
                        label: "نوبت‌ها",
                        children: APPOINTMENTS_CHILDREN_WITH_RESERVE,
                    },
                    {
                        to: "/admin/payments",
                        icon: CreditCardIcon,
                        label: "پرداخت‌ها",
                    },
                    {
                        to: "/admin/settlements",
                        icon: BanknotesIcon,
                        label: "تسویه‌حساب",
                    },
                    {
                        to: "/admin/financial-report",
                        icon: BanknotesIcon,
                        label: "گزارش مالی",
                    },
                    {
                        to: "/admin/pre-registrations",
                        icon: ClipboardDocumentCheckIcon,
                        label: "درخواست‌های ثبت‌نام",
                    },
                ],
            },
            {
                label: "محتوا",
                items: [
                    {
                        to: "/admin/comments",
                        icon: ChatBubbleLeftEllipsisIcon,
                        label: "نظرات",
                    },
                    { to: "/admin/ratings", icon: StarIcon, label: "امتیازها" },
                    {
                        to: "/admin/blogs",
                        icon: DocumentTextIcon,
                        label: "بلاگ",
                    },
                    {
                        to: "/admin/sms",
                        icon: DevicePhoneMobileIcon,
                        label: "پیامک",
                    },
                ],
            },
            {
                label: "سیستم",
                items: [
                    {
                        to: "/admin/logs",
                        icon: ClipboardDocumentCheckIcon,
                        label: "لاگ‌ها",
                    },
                    {
                        to: "/admin/categories",
                        icon: TagIcon,
                        label: "دسته‌بندی‌ها",
                    },
                    {
                        to: "/admin/representations",
                        icon: UsersIcon,
                        label: "نمایندگان",
                    },
                    {
                        to: "/admin/secretaries",
                        icon: KeyIcon,
                        label: "منشی‌ها",
                    },
                    {
                        to: "/admin/admin-subscription",
                        icon: CreditCardIcon,
                        label: "اشتراک‌ها",
                    },
                    {
                        to: "/admin/settings",
                        icon: Cog6ToothIcon,
                        label: "تنظیمات",
                    },
                ],
            },
        ];
    }

    if (primaryRole === "clinic") {
        const clinicTo = dbUuid
            ? `/admin/clinics/${dbUuid}`
            : "/admin/settings/clinic-doctors";
        return [
            {
                label: "عمومی",
                items: [
                    {
                        to: "/admin/dashboard",
                        icon: ChartBarIcon,
                        label: "داشبورد",
                    },
                    {
                        to: clinicTo,
                        icon: BuildingOffice2Icon,
                        label: "کلینیک من",
                    },
                ],
            },
            {
                label: "مدیریت",
                items: [
                    {
                        to: "/admin/appointments",
                        icon: CalendarDaysIcon,
                        label: "نوبت‌ها",
                        children: APPOINTMENTS_CHILDREN_WITH_RESERVE,
                    },
                    {
                        to: "/admin/patients",
                        icon: FolderOpenIcon,
                        label: "پرونده بیماران",
                        feature: "patient_records",
                    },
                    {
                        to: "/admin/my-payments",
                        icon: CreditCardIcon,
                        label: "پرداخت‌ها",
                    },
                    {
                        to: "/admin/claims",
                        icon: DocumentTextIcon,
                        label: "مطالبات بیمه",
                        feature: "insurance",
                    },
                    {
                        to: "/admin/inventory",
                        icon: ArchiveBoxIcon,
                        label: "انبارداری",
                    },
                    {
                        to: "/admin/clinic-services",
                        icon: WrenchScrewdriverIcon,
                        label: "سرویس ها",
                    },
                ],
            },
            {
                // مدیریت بیمه / کیف پول پیامک زیر همین «تنظیمات» است
                // (منوی داخل صفحهٔ اشتراک)، نه در سایدبار اصلی.
                label: "تنظیمات",
                items: [
                    {
                        to: "/admin/subscription",
                        icon: Cog6ToothIcon,
                        label: "تنظیمات",
                    },
                ],
            },
        ];
    }

    if (primaryRole === "doctor") {
        return [
            {
                label: "عمومی",
                items: [
                    {
                        to: "/admin/dashboard",
                        icon: ChartBarIcon,
                        label: "داشبورد",
                    },
                ],
            },
            {
                label: "پروفایل",
                items: [
                    {
                        to: "/admin/profile",
                        icon: UserCircleIcon,
                        label: "پروفایل من",
                    },
                ],
            },
            {
                label: "مدیریت",
                items: [
                    {
                        to: "/admin/appointments",
                        icon: CalendarDaysIcon,
                        label: "نوبت‌های من",
                        children: APPOINTMENTS_CHILDREN,
                    },
                    {
                        to: "/admin/patients",
                        icon: FolderOpenIcon,
                        label: "پرونده بیماران",
                        feature: "patient_records",
                    },
                    {
                        to: "/admin/my-payments",
                        icon: CreditCardIcon,
                        label: "پرداخت‌ها",
                    },
                    {
                        to: "/admin/claims",
                        icon: DocumentTextIcon,
                        label: "مطالبات بیمه",
                        feature: "insurance",
                    },
                    {
                        to: "/admin/inventory",
                        icon: ArchiveBoxIcon,
                        label: "انبارداری",
                    },
                    {
                        to: "/admin/clinic-services",
                        icon: WrenchScrewdriverIcon,
                        label: "سرویس ها",
                    },
                ],
            },
            {
                // مدیریت بیمه / کیف پول پیامک زیر همین «تنظیمات» است
                // (منوی داخل صفحهٔ اشتراک)، نه در سایدبار اصلی.
                label: "تنظیمات",
                items: [
                    {
                        to: "/admin/subscription",
                        icon: Cog6ToothIcon,
                        label: "تنظیمات",
                    },
                ],
            },
        ];
    }

    if (primaryRole === "secretary") {
        // منو از روی مجوزهای همان منشی ساخته می‌شود: آیتمی که مجوز مشاهده‌اش را
        // ندارد اصلاً نمایش داده نمی‌شود (هم‌راستا با enforcement سمت API).
        const items: SectionItem[] = [];
        if (can("appointments", "view")) {
            items.push({
                to: "/admin/appointments",
                icon: CalendarDaysIcon,
                label: "نوبت‌ها",
                children: APPOINTMENTS_CHILDREN_WITH_RESERVE,
            });
        }
        if (can("patients", "view")) {
            items.push({
                to: "/admin/patients",
                icon: FolderOpenIcon,
                label: "پرونده بیماران",
                feature: "patient_records",
            });
        }
        if (can("payments", "view")) {
            items.push({
                to: "/admin/my-payments",
                icon: CreditCardIcon,
                label: "پرداخت‌ها",
            });
        }
        if (can("insurances", "view")) {
            items.push(
                {
                    to: "/admin/insurance-pricing",
                    icon: ShieldCheckIcon,
                    label: "قیمت‌گذاری بیمه",
                    feature: "insurance",
                },
                {
                    to: "/admin/claims",
                    icon: DocumentTextIcon,
                    label: "مطالبات بیمه",
                    feature: "insurance",
                },
            );
        }
        if (can("services", "view")) {
            items.push({
                to: "/admin/clinic-services",
                icon: WrenchScrewdriverIcon,
                label: "سرویس ها",
            });
        }
        if (can("inventory", "view")) {
            items.push({
                to: "/admin/inventory",
                icon: ArchiveBoxIcon,
                label: "انبارداری",
            });
        }

        // منابعِ زیرمجموعهٔ «تنظیمات» (staff/discounts/sms/tags/appointment_settings/
        // clinic_doctors) در سایدبار اصلی نمی‌آیند — دقیقاً مثل پزشک/کلینیک، فقط داخل
        // صفحهٔ «تنظیمات» با منویِ permission-aware نمایش داده می‌شوند.
        return [
            {
                label: "عمومی",
                items: [{ to: "/admin/dashboard", icon: ChartBarIcon, label: "داشبورد" }],
            },
            { label: "مدیریت", items },
            {
                label: "تنظیمات",
                items: [
                    {
                        // لندینگِ تنظیمات؛ حساب کاربری همیشه باز است و منویِ کناری
                        // بقیهٔ بخش‌های مجاز را بر اساس permission نشان می‌دهد.
                        to: "/admin/account-settings",
                        icon: Cog6ToothIcon,
                        label: "تنظیمات",
                    },
                ],
            },
        ];
    }

    if (primaryRole === "representation") {
        return [
            {
                label: "عمومی",
                items: [
                    {
                        to: "/admin/dashboard",
                        icon: ChartBarIcon,
                        label: "داشبورد",
                    },
                ],
            },
            {
                label: "مدیریت",
                items: [
                    { to: "/admin/doctors", icon: HeartIcon, label: "پزشکان" },
                    {
                        to: "/admin/clinics",
                        icon: BuildingOffice2Icon,
                        label: "کلینیک‌ها",
                    },
                ],
            },
            {
                label: "مالی",
                items: [
                    {
                        to: "/admin/representation-finance",
                        icon: CreditCardIcon,
                        label: "گزارش مالی",
                    },
                    {
                        to: "/admin/representation-settlement",
                        icon: BanknotesIcon,
                        label: "تسویه حساب",
                    },
                ],
            },
            {
                label: "حساب",
                items: [
                    {
                        to: "/admin/representation-profile",
                        icon: UserCircleIcon,
                        label: "پروفایل",
                    },
                ],
            },
        ];
    }

    return [
        {
            label: "عمومی",
            items: [
                {
                    to: "/admin/dashboard",
                    icon: ChartBarIcon,
                    label: "داشبورد",
                },
            ],
        },
    ];
}

const ROLE_LABELS: Record<string, string> = {
    admin: "مدیر کل",
    clinic: "مالک کلینیک",
    doctor: "پزشک",
    secretary: "منشی",
    representation: "نماینده",
    user: "کاربر",
};

const HUES = [256, 205, 162, 295, 272];

function avatarBg(name: string): string {
    const hue = HUES[(name.charCodeAt(0) ?? 0) % HUES.length];
    return `linear-gradient(145deg, oklch(0.62 0.15 ${hue}), oklch(0.48 0.16 ${hue}))`;
}

interface Props {
    mobileOpen?: boolean;
    onMobileClose?: () => void;
}

/**
 * یک آیتم سایدبار: منوی ساده (NavLink) یا منوی بازشونده با زیرمنو.
 * منوی بازشونده وقتی یکی از زیرمنوهایش فعال است به‌صورت خودکار باز می‌شود.
 */
function NavItem({
    item,
    sidebarOpen,
    isLocked,
}: {
    item: SectionItem;
    sidebarOpen: boolean;
    isLocked: boolean;
}) {
    const { icon: Icon, label, to, children } = item;
    const location = useLocation();
    const childActive = !!children?.some((c) => location.pathname === c.to);
    // منوی «نوبت‌ها» همیشه باز می‌ماند و جمع نمی‌شود.
    const alwaysOpen = !!children?.some((c) =>
        c.to.startsWith("/admin/appointments"),
    );
    const [openState, setOpen] = useState(childActive);
    const open = alwaysOpen || openState;

    // منوی ساده — رفتار قبلی بدون تغییر.
    if (!children || children.length === 0) {
        const dest = isLocked ? "/admin/subscription" : to;
        return (
            <NavLink
                to={dest}
                title={
                    isLocked
                        ? "نیاز به ارتقاء پنل"
                        : !sidebarOpen
                          ? label
                          : undefined
                }
                className={({ isActive }) =>
                    `nav-item${isActive && !isLocked ? " active" : ""}${isLocked ? " locked" : ""}`
                }
                style={isLocked ? { opacity: 0.55 } : undefined}
            >
                <Icon style={{ width: 19, height: 19, flexShrink: 0 }} />
                <span>{label}</span>
                {isLocked && (
                    <LockClosedIcon
                        style={{
                            width: 12,
                            height: 12,
                            marginRight: "auto",
                            flexShrink: 0,
                        }}
                    />
                )}
            </NavLink>
        );
    }

    // منوی بازشونده.
    return (
        <div className="nav-parent">
            <button
                type="button"
                className={`nav-item${childActive ? " active" : ""}`}
                aria-expanded={open}
                title={!sidebarOpen ? label : undefined}
                onClick={() => !alwaysOpen && setOpen((o) => !o)}
                style={{
                    width: "100%",
                    background: "none",
                    border: "none",
                    cursor: "pointer",
                    font: "inherit",
                }}
            >
                <Icon style={{ width: 19, height: 19, flexShrink: 0 }} />
                <span>{label}</span>
                <ChevronDownIcon
                    style={{
                        width: 15,
                        height: 15,
                        marginRight: "auto",
                        flexShrink: 0,
                        transition: "transform .2s var(--ease)",
                        transform: open ? "rotate(180deg)" : "none",
                    }}
                />
            </button>
            {open && (
                <div style={{ paddingInlineStart: 14 }}>
                    {children.map((c) => {
                        const CIcon = c.icon;
                        return (
                            <NavLink
                                key={c.to + c.label}
                                to={c.to}
                                end
                                title={!sidebarOpen ? c.label : undefined}
                                className={({ isActive }) =>
                                    `nav-item nav-subitem${isActive ? " active" : ""}`
                                }
                            >
                                {CIcon ? (
                                    <CIcon
                                        style={{
                                            width: 16,
                                            height: 16,
                                            flexShrink: 0,
                                        }}
                                    />
                                ) : (
                                    <span
                                        style={{ width: 16, flexShrink: 0 }}
                                    />
                                )}
                                <span>{c.label}</span>
                            </NavLink>
                        );
                    })}
                </div>
            )}
        </div>
    );
}

export default function Sidebar({ mobileOpen: _m, onMobileClose: _c }: Props) {
    const sidebarOpen = useUiStore((s) => s.sidebarOpen);
    const {
        logout,
        primaryRole,
        userName,
        availableContexts,
        dbUuid,
        context,
    } = useAuthStore();
    const { hasFeature } = useSubscription();
    const navigate = useNavigate();

    const { can } = usePermissions();
    const sections = buildSections(primaryRole, dbUuid, context?.scope ?? null, can);
    const initials = (userName ?? "U").charAt(0).toUpperCase();

    return (
        <aside className="sidebar">
            {/* Brand */}
            <div className="sidebar-brand">
                <div className="brand-logo">
                    <img
                        src="/logo.svg"
                        alt="Clinic Pro"
                        className="brand-img"
                    />
                </div>
                <div className="brand-text">
                    <b>ClinicPro</b>
                    <span>پنل مدیریت</span>
                </div>
            </div>

            {/* Navigation */}
            <nav className="nav">
                {sections.map((section) => (
                    <div className="nav-group" key={section.label}>
                        <span className="nav-label">{section.label}</span>
                        {section.items.map((item) => (
                            <NavItem
                                key={item.to + item.label}
                                item={item}
                                sidebarOpen={sidebarOpen}
                                isLocked={
                                    item.feature
                                        ? !hasFeature(item.feature)
                                        : false
                                }
                            />
                        ))}
                    </div>
                ))}

                {/* تغییر محیط کاری — فقط اگر چند context دارد */}
                {availableContexts.length > 1 && (
                    <div className="nav-group">
                        <span className="nav-label">محیط کاری</span>
                        <NavLink
                            to="/admin/select-context"
                            title={!sidebarOpen ? "تغییر محیط" : undefined}
                            className={({ isActive }) =>
                                `nav-item${isActive ? " active" : ""}`
                            }
                        >
                            <ArrowsRightLeftIcon
                                style={{ width: 19, height: 19, flexShrink: 0 }}
                            />
                            <span>تغییر محیط</span>
                        </NavLink>
                    </div>
                )}
            </nav>

            {/* User footer */}
            <div className="sidebar-foot">
                <div
                    className="user-chip"
                    onClick={() => {
                        logout();
                        navigate("/admin/login");
                    }}
                    title="خروج از سیستم"
                >
                    <div
                        className="avatar sm"
                        style={{
                            background: avatarBg(userName ?? "U"),
                            flexShrink: 0,
                        }}
                    >
                        {initials}
                    </div>
                    <div className="user-meta">
                        <b>{userName ?? "کاربر"}</b>
                        <span>
                            {ROLE_LABELS[primaryRole ?? ""] ??
                                primaryRole ??
                                ""}
                        </span>
                    </div>
                    <ArrowLeftOnRectangleIcon
                        style={{
                            width: 16,
                            height: 16,
                            flexShrink: 0,
                            color: "var(--text-3)",
                        }}
                    />
                </div>
            </div>
        </aside>
    );
}