"use client";
import { useEffect, useRef, useState } from "react";
import { Bookmark, ChevronDown, Gem, Star, MinusCircle, Package, Check } from "lucide-react";
import { cn } from "@/lib/utils";
import type { FilterCriteria, MarkOption } from "@/lib/filters";

const OPTIONS: Array<{
  value: MarkOption;
  label: string;
  Icon: React.ComponentType<{ className?: string }>;
  tint: "cyan" | "amber" | "violet" | "muted";
}> = [
  { value: "vip",      label: "VIP",      Icon: Gem,         tint: "cyan" },
  { value: "favorite", label: "Favorite", Icon: Star,        tint: "amber" },
  { value: "owned",    label: "Owned",    Icon: Package,     tint: "violet" },
  { value: "unmarked", label: "Unmarked", Icon: MinusCircle, tint: "muted" },
];

export function MarkPopover({
  criteria,
  onChange,
}: {
  criteria: FilterCriteria;
  onChange: (next: FilterCriteria) => void;
}) {
  const [open, setOpen] = useState(false);
  const wrapRef = useRef<HTMLDivElement>(null);
  const active = criteria.marks.length > 0;

  useEffect(() => {
    if (!open) return;
    const onDoc = (e: MouseEvent) => {
      if (!wrapRef.current?.contains(e.target as Node)) setOpen(false);
    };
    document.addEventListener("mousedown", onDoc);
    return () => document.removeEventListener("mousedown", onDoc);
  }, [open]);

  useEffect(() => {
    if (!open) return;
    const onKey = (e: KeyboardEvent) => { if (e.key === "Escape") setOpen(false); };
    window.addEventListener("keydown", onKey);
    return () => window.removeEventListener("keydown", onKey);
  }, [open]);

  function toggle(value: MarkOption) {
    const has = criteria.marks.includes(value);
    const next = has ? criteria.marks.filter((m) => m !== value) : [...criteria.marks, value];
    onChange({ ...criteria, marks: next });
  }

  function selectAll() { onChange({ ...criteria, marks: [] }); }

  return (
    <div className="relative" ref={wrapRef}>
      <button
        type="button"
        onClick={() => setOpen((v) => !v)}
        className={cn(
          "flex items-center gap-1.5 px-3 py-1.5 rounded-full border text-sm transition-colors min-w-[140px] justify-between",
          active
            ? "bg-[var(--color-violet)]/12 border-[var(--color-violet)]/40 text-[var(--color-violet)]"
            : "glass glass-hover text-[var(--color-fg-dim)]",
        )}
      >
        <Bookmark className="w-3.5 h-3.5" />
        Filter
        <span
          className={cn(
            "inline-flex items-center justify-center min-w-[18px] h-[18px] px-1 rounded-full bg-[var(--color-violet)] text-black text-[10px] font-mono font-bold tabular-nums",
            !active && "invisible",
          )}
        >
          {criteria.marks.length || 0}
        </span>
        <ChevronDown className="w-3 h-3 opacity-70" />
      </button>

      {open && (
        <div
          className="absolute left-0 top-[calc(100%+6px)] z-30 bg-[var(--color-bg-0)] border border-[var(--color-glass-border-strong)] rounded-xl shadow-2xl p-2 w-60"
          onClick={(e) => e.stopPropagation()}
        >
          <button
            type="button"
            onClick={selectAll}
            className={cn(
              "w-full flex items-center gap-2.5 px-2 py-1.5 rounded-md text-sm text-left transition-colors",
              !active
                ? "bg-[var(--color-glass-strong)] text-[var(--color-fg)]"
                : "text-[var(--color-fg-dim)] hover:text-[var(--color-fg)] hover:bg-[var(--color-glass)]",
            )}
          >
            <span className={cn(
              "w-4 h-4 rounded border flex items-center justify-center shrink-0",
              !active ? "bg-[var(--color-fg)]/20 border-[var(--color-fg-dim)]" : "border-[var(--color-glass-border-strong)]",
            )}>
              {!active && <span className="w-1.5 h-1.5 rounded-full bg-[var(--color-fg)]" />}
            </span>
            <span className="flex-1">All (clear filter)</span>
          </button>

          <div className="h-px bg-[var(--color-glass-border)] my-1" />

          {OPTIONS.map(({ value, label, Icon, tint }) => {
            const on = criteria.marks.includes(value);
            return (
              <button
                key={value}
                type="button"
                onClick={() => toggle(value)}
                className={cn(
                  "w-full flex items-center gap-2.5 px-2 py-1.5 rounded-md text-sm text-left transition-colors",
                  on
                    ? tint === "cyan"   ? "bg-[var(--color-cyan)]/15 text-[var(--color-cyan)]"
                    : tint === "amber"  ? "text-amber-200"
                    : tint === "violet" ? "bg-[var(--color-violet)]/15 text-[var(--color-violet)]"
                    : "bg-[var(--color-glass-strong)] text-[var(--color-fg)]"
                    : "text-[var(--color-fg-dim)] hover:text-[var(--color-fg)] hover:bg-[var(--color-glass)]",
                )}
                style={on && tint === "amber" ? { background: "rgba(251,191,36,0.15)" } : undefined}
              >
                <span className={cn(
                  "w-4 h-4 rounded border flex items-center justify-center shrink-0",
                  on
                    ? tint === "cyan"   ? "bg-[var(--color-cyan)]/30 border-[var(--color-cyan)]"
                    : tint === "amber"  ? "border-amber-400"
                    : tint === "violet" ? "bg-[var(--color-violet)]/30 border-[var(--color-violet)]"
                    : "bg-[var(--color-fg-dim)]/30 border-[var(--color-fg-dim)]"
                    : "border-[var(--color-glass-border-strong)]",
                )}
                style={on && tint === "amber" ? { background: "rgba(251,191,36,0.25)" } : undefined}>
                  {on && (
                    <Check
                      className="w-3 h-3"
                      strokeWidth={3}
                      style={{
                        color: tint === "cyan" ? "var(--color-cyan)"
                          : tint === "amber" ? "#fbbf24"
                          : tint === "violet" ? "var(--color-violet)"
                          : "var(--color-fg)",
                      }}
                    />
                  )}
                </span>
                <span
                  className="inline-flex items-center"
                  style={{
                    color: tint === "cyan" ? "var(--color-cyan)"
                      : tint === "amber" ? "#fbbf24"
                      : tint === "violet" ? "var(--color-violet)"
                      : "var(--color-fg-muted)",
                  }}
                >
                  <Icon className={cn("w-3.5 h-3.5", on && tint === "amber" && "fill-amber-300")} />
                </span>
                <span className="flex-1">{label}</span>
              </button>
            );
          })}
        </div>
      )}
    </div>
  );
}