import { AlertTriangle, ArrowDown, ArrowUp, CheckCircle2, CircleDot, CirclePause, Flag, Minus } from "lucide-react";

import { Badge } from "@/components/ui/badge";
import { cn } from "@/lib/utils";

export type ZammadStateFilter = "all" | "none" | "2" | "3" | "4" | "7";
export type ZammadPriorityFilter = "all" | "none" | "1" | "2" | "3";

export const zammadStateFilterOptions: Array<{ value: ZammadStateFilter; label: string }> = [
  { value: "all", label: "Alle Zammad-Status" },
  { value: "2", label: "Offen" },
  { value: "3", label: "Wartend" },
  { value: "4", label: "Geschlossen" },
  { value: "7", label: "Abschluss" },
  { value: "none", label: "Ohne Zammad-Status" }
];

export const zammadPriorityFilterOptions: Array<{ value: ZammadPriorityFilter; label: string }> = [
  { value: "all", label: "Alle Prioritäten" },
  { value: "1", label: "Niedrig" },
  { value: "2", label: "Normal" },
  { value: "3", label: "Hoch" },
  { value: "none", label: "Ohne Priorität" }
];

const zammadStateMeta = {
  "2": {
    label: "Offen",
    order: 10,
    className: "border-emerald-500/30 bg-emerald-500/10 text-emerald-700 dark:text-emerald-300",
    Icon: CircleDot
  },
  "3": {
    label: "Wartend",
    order: 20,
    className: "border-blue-500/30 bg-blue-500/10 text-blue-700 dark:text-blue-300",
    Icon: CirclePause
  },
  "7": {
    label: "Abschluss",
    order: 30,
    className: "border-amber-500/30 bg-amber-500/10 text-amber-700 dark:text-amber-300",
    Icon: Flag
  },
  "4": {
    label: "Geschlossen",
    order: 40,
    className: "border-slate-500/30 bg-slate-500/10 text-slate-700 dark:text-slate-300",
    Icon: CheckCircle2
  }
};

const zammadPriorityMeta = {
  "1": {
    label: "Niedrig",
    order: 10,
    className: "border-blue-500/30 bg-blue-500/10 text-blue-700 dark:text-blue-300",
    Icon: ArrowDown
  },
  "2": {
    label: "Normal",
    order: 20,
    className: "border-emerald-500/30 bg-emerald-500/10 text-emerald-700 dark:text-emerald-300",
    Icon: Minus
  },
  "3": {
    label: "Hoch",
    order: 30,
    className: "border-red-500/30 bg-red-500/10 text-red-700 dark:text-red-300",
    Icon: ArrowUp
  }
};

export function zammadId(value: unknown) {
  if (value === null || value === undefined || value === "") {
    return null;
  }

  const normalized = String(value).trim();
  return /^\d+$/.test(normalized) ? normalized.replace(/^0+(?=\d)/, "") : normalized || null;
}

export function zammadStateLabel(value: unknown) {
  const id = zammadId(value);
  return id ? zammadStateMeta[id as keyof typeof zammadStateMeta]?.label ?? `Status ${id}` : "-";
}

export function zammadPriorityLabel(value: unknown) {
  const id = zammadId(value);
  return id ? zammadPriorityMeta[id as keyof typeof zammadPriorityMeta]?.label ?? `Priorität ${id}` : "-";
}

export function zammadStateSortRank(value: unknown) {
  const id = zammadId(value);
  const fallback = id ? Number(id) : Number.NaN;
  return id ? zammadStateMeta[id as keyof typeof zammadStateMeta]?.order ?? (Number.isFinite(fallback) ? 900 + fallback : 999) : 999;
}

export function zammadPrioritySortRank(value: unknown) {
  const id = zammadId(value);
  const fallback = id ? Number(id) : Number.NaN;
  return id ? zammadPriorityMeta[id as keyof typeof zammadPriorityMeta]?.order ?? (Number.isFinite(fallback) ? 900 + fallback : 999) : 999;
}

export function matchesZammadStateFilter(value: unknown, filter: ZammadStateFilter) {
  const id = zammadId(value);
  return filter === "all" || (filter === "none" ? !id : id === filter);
}

export function matchesZammadPriorityFilter(value: unknown, filter: ZammadPriorityFilter) {
  const id = zammadId(value);
  return filter === "all" || (filter === "none" ? !id : id === filter);
}

export function ZammadStateBadge({ stateId, className }: { stateId: unknown; className?: string }) {
  const id = zammadId(stateId);

  if (!id) {
    return null;
  }

  const meta = zammadStateMeta[id as keyof typeof zammadStateMeta];
  const Icon = meta?.Icon ?? AlertTriangle;

  return (
    <Badge variant="outline" className={cn(meta?.className ?? "border-border bg-muted/40 text-muted-foreground", className)}>
      <Icon className="size-3" />
      {meta?.label ?? `Status ${id}`}
    </Badge>
  );
}

export function ZammadPriorityBadge({ priorityId, className }: { priorityId: unknown; className?: string }) {
  const id = zammadId(priorityId);

  if (!id) {
    return null;
  }

  const meta = zammadPriorityMeta[id as keyof typeof zammadPriorityMeta];
  const Icon = meta?.Icon ?? AlertTriangle;

  return (
    <Badge variant="outline" className={cn(meta?.className ?? "border-border bg-muted/40 text-muted-foreground", className)}>
      <Icon className="size-3" />
      {meta?.label ?? `Priorität ${id}`}
    </Badge>
  );
}