'use client';

import { useState } from 'react';
import { useTranslations } from 'next-intl';
import {
  Settings,
  RotateCcw,
  Bookmark,
  Film,
  Share2,
  Camera,
  MessageSquare,
  LayoutGrid,
  ChevronDown,
  ChevronUp,
  Eye,
  EyeOff,
} from 'lucide-react';
import { dynastyColors, categoryIcons } from '@/data/relics';

export interface LayerState {
  dynasties: Record<string, boolean>;
  categories: Record<string, boolean>;
  clusters: boolean;
  labels: boolean;
}

interface LayerPanelProps {
  state: LayerState;
  onChange: (state: LayerState) => void;
  onReset: () => void;
}

export function LayerPanel({ state, onChange, onReset }: LayerPanelProps) {
  const t = useTranslations();
  const [dynastyOpen, setDynastyOpen] = useState(true);
  const [categoryOpen, setCategoryOpen] = useState(true);
  const [displayOpen, setDisplayOpen] = useState(false);

  const allDynastiesVisible = Object.values(state.dynasties).every(Boolean);
  const allCategoriesVisible = Object.values(state.categories).every(Boolean);

  const toggleDynasty = (dyn: string) => {
    onChange({
      ...state,
      dynasties: { ...state.dynasties, [dyn]: !state.dynasties[dyn] },
    });
  };

  const toggleAllDynasties = () => {
    const next = !allDynastiesVisible;
    onChange({
      ...state,
      dynasties: Object.fromEntries(Object.keys(state.dynasties).map((k) => [k, next])),
    });
  };

  const toggleCategory = (cat: string) => {
    onChange({
      ...state,
      categories: { ...state.categories, [cat]: !state.categories[cat] },
    });
  };

  const toggleAllCategories = () => {
    const next = !allCategoriesVisible;
    onChange({
      ...state,
      categories: Object.fromEntries(Object.keys(state.categories).map((k) => [k, next])),
    });
  };

  const dynastyName = (dyn: string) => {
    try {
      return t(`dynasty.${dyn}`);
    } catch {
      return dyn;
    }
  };

  const categoryName = (cat: string) => {
    try {
      return t(`category.${cat}`);
    } catch {
      return cat;
    }
  };

  return (
    <div className="absolute top-16 right-4 bottom-4 z-10 w-72 flex flex-col gap-2 pointer-events-none">
      {/* Main panel */}
      <div className="bg-[#06060c]/95 backdrop-blur-md border border-[var(--map-border)] rounded-xl shadow-2xl overflow-hidden flex flex-col pointer-events-auto">
        {/* Header */}
        <div className="flex items-center justify-between px-3 py-2 border-b border-[var(--map-border)]">
          <div className="flex items-center gap-2">
            <span className="px-1.5 py-0.5 text-[10px] font-bold uppercase tracking-wider rounded bg-blue-600/20 text-blue-400 border border-blue-600/30">
              Beta
            </span>
            <h2 className="text-sm font-semibold text-[var(--map-text)]">{t('sidebar.operatingRelics')}</h2>
          </div>
          <button
            onClick={() => setDisplayOpen(!displayOpen)}
            className="w-7 h-7 flex items-center justify-center rounded-md hover:bg-white/10 text-[var(--map-text-muted)] hover:text-white transition-colors"
            aria-label="Display settings"
          >
            <Settings className="w-4 h-4" />
          </button>
        </div>

        {/* Display settings dropdown */}
        {displayOpen && (
          <div className="px-3 py-2 border-b border-[var(--map-border)] bg-white/5">
            <p className="text-xs text-[var(--map-text-muted)] leading-relaxed">
              {t('sidebar.displayHint')}
            </p>
          </div>
        )}

        {/* Scrollable sections */}
        <div className="flex-1 overflow-y-auto p-2 space-y-1">
          {/* Dynasty section */}
          <div className="rounded-lg border border-[var(--map-border)] overflow-hidden">
            <div className="w-full flex items-center justify-between px-3 py-2 bg-white/5">
              <div className="flex items-center gap-2">
                <button
                  onClick={toggleAllDynasties}
                  className={`w-6 h-6 rounded flex items-center justify-center text-xs transition-colors ${
                    allDynastiesVisible ? 'bg-blue-600 text-white' : 'bg-[var(--map-panel)] text-[var(--map-text-muted)]'
                  }`}
                  aria-label={allDynastiesVisible ? 'Hide all dynasties' : 'Show all dynasties'}
                >
                  {allDynastiesVisible ? <Eye className="w-3 h-3" /> : <EyeOff className="w-3 h-3" />}
                </button>
                <span className="text-sm font-medium text-[var(--map-text)]">{t('filter.dynasty')}</span>
              </div>
              <button
                onClick={() => setDynastyOpen(!dynastyOpen)}
                className="w-7 h-7 flex items-center justify-center rounded-md hover:bg-white/10 transition-colors"
                aria-label={dynastyOpen ? 'Collapse dynasty section' : 'Expand dynasty section'}
              >
                {dynastyOpen ? <ChevronUp className="w-4 h-4 text-[var(--map-text-muted)]" /> : <ChevronDown className="w-4 h-4 text-[var(--map-text-muted)]" />}
              </button>
            </div>

            {dynastyOpen && (
              <div className="px-2 py-2 grid grid-cols-2 gap-1">
                {Object.entries(dynastyColors).map(([dyn, color]) => (
                  <button
                    key={dyn}
                    onClick={() => toggleDynasty(dyn)}
                    className={`flex items-center gap-2 px-2 py-1.5 rounded-md text-xs transition-colors ${
                      state.dynasties[dyn] ? 'bg-white/10 text-white' : 'text-[var(--map-text-muted)] hover:bg-white/5'
                    }`}
                  >
                    <span className="w-2.5 h-2.5 rounded-full" style={{ backgroundColor: color }} />
                    <span className="truncate">{dynastyName(dyn)}</span>
                  </button>
                ))}
              </div>
            )}
          </div>

          {/* Category section */}
          <div className="rounded-lg border border-[var(--map-border)] overflow-hidden">
            <div className="w-full flex items-center justify-between px-3 py-2 bg-white/5">
              <div className="flex items-center gap-2">
                <button
                  onClick={toggleAllCategories}
                  className={`w-6 h-6 rounded flex items-center justify-center text-xs transition-colors ${
                    allCategoriesVisible ? 'bg-blue-600 text-white' : 'bg-[var(--map-panel)] text-[var(--map-text-muted)]'
                  }`}
                  aria-label={allCategoriesVisible ? 'Hide all categories' : 'Show all categories'}
                >
                  {allCategoriesVisible ? <Eye className="w-3 h-3" /> : <EyeOff className="w-3 h-3" />}
                </button>
                <span className="text-sm font-medium text-[var(--map-text)]">{t('filter.category')}</span>
              </div>
              <button
                onClick={() => setCategoryOpen(!categoryOpen)}
                className="w-7 h-7 flex items-center justify-center rounded-md hover:bg-white/10 transition-colors"
                aria-label={categoryOpen ? 'Collapse category section' : 'Expand category section'}
              >
                {categoryOpen ? <ChevronUp className="w-4 h-4 text-[var(--map-text-muted)]" /> : <ChevronDown className="w-4 h-4 text-[var(--map-text-muted)]" />}
              </button>
            </div>

            {categoryOpen && (
              <div className="px-2 py-2 grid grid-cols-2 gap-1">
                {Object.entries(categoryIcons).map(([cat, icon]) => (
                  <button
                    key={cat}
                    onClick={() => toggleCategory(cat)}
                    className={`flex items-center gap-2 px-2 py-1.5 rounded-md text-xs transition-colors ${
                      state.categories[cat] ? 'bg-white/10 text-white' : 'text-[var(--map-text-muted)] hover:bg-white/5'
                    }`}
                  >
                    <span className="w-2.5 h-2.5 flex items-center justify-center text-[10px]">{icon}</span>
                    <span className="truncate">{categoryName(cat)}</span>
                  </button>
                ))}
              </div>
            )}
          </div>

          {/* Clusters toggle */}
          <button
            onClick={() => onChange({ ...state, clusters: !state.clusters })}
            className={`w-full flex items-center justify-between px-3 py-2 rounded-lg border border-[var(--map-border)] transition-colors ${
              state.clusters ? 'bg-white/10 text-white' : 'bg-white/5 text-[var(--map-text-muted)] hover:bg-white/10'
            }`}
          >
            <span className="text-sm font-medium">{t('sidebar.clustering')}</span>
            <span className="text-xs">{state.clusters ? t('sidebar.on') : t('sidebar.off')}</span>
          </button>

          {/* Labels toggle */}
          <button
            onClick={() => onChange({ ...state, labels: !state.labels })}
            className={`w-full flex items-center justify-between px-3 py-2 rounded-lg border border-[var(--map-border)] transition-colors ${
              state.labels ? 'bg-white/10 text-white' : 'bg-white/5 text-[var(--map-text-muted)] hover:bg-white/10'
            }`}
          >
            <span className="text-sm font-medium">{t('sidebar.labels')}</span>
            <span className="text-xs">{state.labels ? t('sidebar.on') : t('sidebar.off')}</span>
          </button>
        </div>

        {/* Bottom actions */}
        <div className="border-t border-[var(--map-border)] p-2 grid grid-cols-2 gap-1.5">
          <ActionButton icon={<RotateCcw className="w-3.5 h-3.5" />} label={t('map.reset')} onClick={onReset} />
          <ActionButton icon={<Bookmark className="w-3.5 h-3.5" />} label={t('sidebar.savedViews')} />
          <ActionButton icon={<Film className="w-3.5 h-3.5" />} label={t('sidebar.cinematic')} />
          <ActionButton icon={<Share2 className="w-3.5 h-3.5" />} label={t('sidebar.share')} />
          <ActionButton icon={<Camera className="w-3.5 h-3.5" />} label={t('sidebar.screenshot')} />
          <ActionButton icon={<MessageSquare className="w-3.5 h-3.5" />} label={t('sidebar.feedback')} />
        </div>
      </div>

      {/* Cards panel toggle */}
      <button className="self-end flex items-center gap-2 px-3 py-2 rounded-lg bg-[#0b0f1e]/90 backdrop-blur-md border border-[var(--map-border)] text-sm text-[var(--map-text-muted)] hover:text-white hover:bg-white/10 transition-colors pointer-events-auto">
        <LayoutGrid className="w-4 h-4" />
        <span>{t('sidebar.cards')}</span>
      </button>
    </div>
  );
}

function ActionButton({
  icon,
  label,
  onClick,
  disabled,
}: {
  icon: React.ReactNode;
  label: string;
  onClick?: () => void;
  disabled?: boolean;
}) {
  return (
    <button
      onClick={onClick}
      disabled={disabled}
      className="flex items-center justify-center gap-1.5 px-2 py-1.5 rounded-md bg-[var(--map-panel)] hover:bg-[var(--map-panel-hover)] border border-[var(--map-border)] text-xs text-[var(--map-text-muted)] hover:text-white transition-colors disabled:opacity-50 disabled:cursor-not-allowed"
    >
      {icon}
      <span className="truncate">{label}</span>
    </button>
  );
}