'use client';

import { useState, useMemo } from 'react';
import { Button } from '@/components/ui/button';
import { Progress } from '@/components/ui/progress';
import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
import { Badge } from '@/components/ui/badge';
import { ScrollArea } from '@/components/ui/scroll-area';
import { Separator } from '@/components/ui/separator';
import { Anvil, FlaskConical, Hammer, Package, Sparkles, Sword } from 'lucide-react';
import { MaterialRecipeCard } from './MaterialRecipeCard';
import { FABRICATOR_RECIPES, MATERIAL_RECIPES, canCraftRecipe } from '@/lib/game/data/fabricator-recipes';
import { MANA_TYPE_LABELS } from '@/lib/game/data/fabricator-recipe-types';
import { LOOT_DROPS, LOOT_RARITY_COLORS } from '@/lib/game/data/loot-drops';
import { useCraftingStore, useManaStore } from '@/lib/game/stores';
import type { FabricatorRecipe } from '@/lib/game/data/fabricator-recipes';
import { DebugName } from '@/components/game/debug/debug-context';
import { getCraftingCostReduction, applyCostReduction } from '@/lib/game/crafting-fabricator';

const BRANCH_RECIPE_IDS = new Set([
  'oakStaff', 'arcanistStaff', 'battlestaff', 'arcanistCirclet', 'arcanistRobe',
  'voidCatalyst', 'arcanistPendant',
  'crystalBlade', 'arcanistBlade', 'voidBlade', 'battleHelm', 'battleRobe',
  'battleBoots', 'combatGauntlets',
]);

function isWizardBranch(recipe: FabricatorRecipe): boolean {
  return ['oakStaff', 'arcanistStaff', 'battlestaff', 'arcanistCirclet',
    'arcanistRobe', 'voidCatalyst', 'arcanistPendant'].includes(recipe.id);
}

function isPhysicalBranch(recipe: FabricatorRecipe): boolean {
  return ['crystalBlade', 'arcanistBlade', 'voidBlade', 'battleHelm',
    'battleRobe', 'battleBoots', 'combatGauntlets'].includes(recipe.id);
}

function RecipeCard({
  recipe,
  materials,
  rawMana,
  elementalMana,
  onCraft,
  isCrafting,
  costReduction,
}: {
  recipe: FabricatorRecipe;
  materials: Record<string, number>;
  rawMana: number;
  elementalMana: Record<string, { current: number; max: number; unlocked: boolean }>;
  onCraft: (recipe: FabricatorRecipe) => void;
  isCrafting: boolean;
  costReduction: number;
}) {
  const pool = recipe.manaType === 'raw'
    ? rawMana
    : (elementalMana[recipe.manaType]?.current ?? 0);
  const { canCraft } = canCraftRecipe(
    recipe,
    materials,
    pool,
    recipe.manaType,
    costReduction,
  );
  const rarityStyle = LOOT_RARITY_COLORS[recipe.rarity];

  return (
    <div
      className="p-3 rounded border bg-gray-800/50"
      style={{ borderColor: rarityStyle?.color }}
    >
      <div className="flex justify-between items-start mb-2">
        <div>
          <div className="font-semibold" style={{ color: rarityStyle?.color }}>
            {recipe.name}
          </div>
          <div className="text-xs text-gray-400 capitalize">{recipe.rarity}</div>
        </div>
        <Badge variant="outline" className="text-xs">
          {MANA_TYPE_LABELS[recipe.manaType] ?? recipe.manaType}
        </Badge>
      </div>

      <div className="text-xs text-gray-400 mb-2">{recipe.description}</div>
      <div className="text-xs text-amber-400/80 italic mb-2">{recipe.gearTrait}</div>

      <Separator className="bg-gray-700 my-2" />

      <div className="text-xs space-y-1">
        <div className="text-gray-500 flex justify-between">
          <span>Materials:</span>
          {costReduction > 0 && (
            <span className="text-cyan-400">-{costReduction}% cost</span>
          )}
        </div>
        {Object.entries(recipe.materials).map(([matId, rawAmount]) => {
          const reducedAmount = applyCostReduction(rawAmount, costReduction);
          const available = materials[matId] || 0;
          const hasEnough = available >= reducedAmount;
          const matDrop = LOOT_DROPS[matId];

          return (
            <div key={matId} className="flex justify-between">
              <span>{matDrop?.name ?? matId}</span>
              <span className={hasEnough ? 'text-green-400' : 'text-red-400'}>
                {available} / {reducedAmount}
                {costReduction > 0 && rawAmount !== reducedAmount && (
                  <span className="text-gray-500 ml-1">(was {rawAmount})</span>
                )}
              </span>
            </div>
          );
        })}

        <div className="flex justify-between mt-2">
          <span>{MANA_TYPE_LABELS[recipe.manaType]?.split(' ')[1] ?? recipe.manaType} Mana:</span>
          <span className={pool >= recipe.manaCost ? 'text-green-400' : 'text-red-400'}>
            {pool} / {recipe.manaCost}
          </span>
        </div>

        <div className="flex justify-between">
          <span>Craft Time:</span>
          <span>{recipe.craftTime}h</span>
        </div>
      </div>

      <Button
        className="w-full mt-3"
        size="sm"
        disabled={!canCraft || isCrafting}
        onClick={() => onCraft(recipe)}
      >
        {canCraft ? 'Craft' : 'Missing Resources'}
      </Button>
    </div>
  );
}

type BranchFilter = 'all' | 'elemental' | 'wizard' | 'physical';

export function FabricatorSubTab() {
  const [selectedManaType, setSelectedManaType] = useState<string>('earth');
  const [activeSection, setActiveSection] = useState<'equipment' | 'materials'>('equipment');
  const [branchFilter, setBranchFilter] = useState<BranchFilter>('all');

  const lootInventory = useCraftingStore((s) => s.lootInventory);
  const unlockedRecipes = useCraftingStore((s) => s.unlockedRecipes);
  const equipmentCraftingProgress = useCraftingStore((s) => s.equipmentCraftingProgress);
  const rawMana = useManaStore((s) => s.rawMana);
  const elements = useManaStore((s) => s.elements);
  const startFabricatorCrafting = useCraftingStore((s) => s.startFabricatorCrafting);
  const craftMaterial = useCraftingStore((s) => s.craftMaterial);
  const cancelEquipmentCrafting = useCraftingStore((s) => s.cancelEquipmentCrafting);

  const availableManaTypes = useMemo(() => {
    return [...new Set(FABRICATOR_RECIPES.map((r) => r.manaType))];
  }, []);

  const filteredRecipes = useMemo(() => {
    let recipes = FABRICATOR_RECIPES;
    if (branchFilter === 'elemental') {
      recipes = recipes.filter(r => !BRANCH_RECIPE_IDS.has(r.id));
    } else if (branchFilter === 'wizard') {
      recipes = recipes.filter(r => isWizardBranch(r));
    } else if (branchFilter === 'physical') {
      recipes = recipes.filter(r => isPhysicalBranch(r));
    }
    return recipes.filter(r => r.manaType === selectedManaType && unlockedRecipes.includes(r.id));
  }, [selectedManaType, branchFilter, unlockedRecipes]);

  const isCrafting = equipmentCraftingProgress !== null;
  const costReduction = getCraftingCostReduction();

  const materialRecipes = useMemo(() => MATERIAL_RECIPES, []);

  const handleCraft = (recipe: FabricatorRecipe) => {
    if (recipe.recipeType === 'material') {
      craftMaterial(recipe.id);
    } else {
      startFabricatorCrafting(recipe.id);
    }
  };

  return (
    <DebugName name="FabricatorSubTab">
    <div className="space-y-4">
      {/* Section toggle: Equipment vs Materials */}
      <div className="flex gap-2">
        <Button
          variant={activeSection === 'equipment' ? 'default' : 'outline'}
          size="sm"
          onClick={() => setActiveSection('equipment')}
        >
          <Hammer className="w-3 h-3 mr-1" />
          Equipment
        </Button>
        <Button
          variant={activeSection === 'materials' ? 'default' : 'outline'}
          size="sm"
          onClick={() => setActiveSection('materials')}
        >
          <FlaskConical className="w-3 h-3 mr-1" />
          Materials
        </Button>
      </div>

      {/* Branch filter — only for equipment */}
      {activeSection === 'equipment' && (
        <>
          <div className="flex gap-2 flex-wrap">
            <Button
              variant={branchFilter === 'all' ? 'default' : 'outline'}
              size="sm"
              onClick={() => setBranchFilter('all')}
            >
              <Anvil className="w-3 h-3 mr-1" />
              All
            </Button>
            <Button
              variant={branchFilter === 'elemental' ? 'default' : 'outline'}
              size="sm"
              onClick={() => setBranchFilter('elemental')}
            >
              <Anvil className="w-3 h-3 mr-1" />
              Elemental
            </Button>
            <Button
              variant={branchFilter === 'wizard' ? 'default' : 'outline'}
              size="sm"
              onClick={() => setBranchFilter('wizard')}
            >
              <Sparkles className="w-3 h-3 mr-1" />
              Wizard
            </Button>
            <Button
              variant={branchFilter === 'physical' ? 'default' : 'outline'}
              size="sm"
              onClick={() => setBranchFilter('physical')}
            >
              <Sword className="w-3 h-3 mr-1" />
              Physical
            </Button>
          </div>

          {/* Mana type filter */}
          <div className="flex gap-2 flex-wrap">
            {availableManaTypes.map((mt) => (
              <Button
                key={mt}
                variant={selectedManaType === mt ? 'default' : 'outline'}
                size="sm"
                onClick={() => setSelectedManaType(mt)}
              >
                {MANA_TYPE_LABELS[mt] ?? mt}
              </Button>
            ))}
          </div>
        </>
      )}

      <div className="grid grid-cols-1 lg:grid-cols-2 gap-4">
        {/* Recipe list */}
        <Card className="bg-gray-900/80 border-gray-700">
          <CardHeader className="pb-2">
            <CardTitle className="text-amber-400 text-sm flex items-center gap-2">
              {activeSection === 'equipment' ? (
                <><Hammer className="w-4 h-4" />{MANA_TYPE_LABELS[selectedManaType] ?? selectedManaType} Recipes</>
              ) : (
                <><FlaskConical className="w-4 h-4" />Material Recipes</>
              )}
            </CardTitle>
          </CardHeader>
          <CardContent>
            {isCrafting ? (
              <div className="space-y-3">
                <div className="text-sm text-gray-400">
                  Crafting: {equipmentCraftingProgress.blueprintId}
                </div>
                <Progress
                  value={
                    (equipmentCraftingProgress.progress /
                      equipmentCraftingProgress.required) *
                    100
                  }
                  className="h-3"
                />
                <div className="flex justify-between text-xs text-gray-400">
                  <span>
                    {equipmentCraftingProgress.progress.toFixed(1)}h /{' '}
                    {equipmentCraftingProgress.required.toFixed(1)}h
                  </span>
                  <span>Mana spent: {equipmentCraftingProgress.manaSpent}</span>
                </div>
                <Button size="sm" variant="outline" onClick={cancelEquipmentCrafting}>
                  Cancel
                </Button>
              </div>
            ) : (
              <ScrollArea className="h-80">
                <div className="space-y-2">
                  {activeSection === 'equipment' ? (
                    filteredRecipes.length === 0 ? (
                      <div className="text-center text-gray-400 py-4">
                        <Anvil className="w-12 h-12 mx-auto mb-2 opacity-50" />
                        <p>No recipes for this mana type yet.</p>
                      </div>
                    ) : (
                      filteredRecipes.map((recipe) => (
                        <RecipeCard
                          key={recipe.id}
                          recipe={recipe}
                          materials={lootInventory.materials}
                          rawMana={rawMana}
                          elementalMana={elements}
                          onCraft={handleCraft}
                          isCrafting={isCrafting}
                          costReduction={costReduction}
                        />
                      ))
                    )
                  ) : (
                    materialRecipes.length === 0 ? (
                      <div className="text-center text-gray-400 py-4">
                        <FlaskConical className="w-12 h-12 mx-auto mb-2 opacity-50" />
                        <p>No material recipes available.</p>
                      </div>
                    ) : (
                      materialRecipes.map((recipe) => (
                        <MaterialRecipeCard
                          key={recipe.id}
                          recipe={recipe}
                          materials={lootInventory.materials}
                          rawMana={rawMana}
                          elementalMana={elements}
                          onCraft={handleCraft}
                          costReduction={costReduction}
                        />
                      ))
                    )
                  )}
                </div>
              </ScrollArea>
            )}
          </CardContent>
        </Card>

        {/* Materials inventory */}
        <Card className="bg-gray-900/80 border-gray-700">
          <CardHeader className="pb-2">
            <CardTitle className="text-amber-400 text-sm flex items-center gap-2">
              <Package className="w-4 h-4" />
              Materials ({Object.values(lootInventory.materials).reduce((a, b) => a + b, 0)})
            </CardTitle>
          </CardHeader>
          <CardContent>
            <ScrollArea className="h-80">
              {Object.keys(lootInventory.materials).length === 0 ? (
                <div className="text-center text-gray-400 py-4">
                  <Package className="w-12 h-12 mx-auto mb-2 opacity-50" />
                  <p>No materials collected yet.</p>
                  <p className="text-xs mt-1">Defeat floors to gather materials!</p>
                </div>
              ) : (
                <div className="grid grid-cols-2 gap-2">
                  {Object.entries(lootInventory.materials).map(([matId, count]) => {
                    if (count <= 0) return null;
                    const drop = LOOT_DROPS[matId];
                    if (!drop) return null;

                    const rarityStyle = LOOT_RARITY_COLORS[drop.rarity];

                    return (
                      <div
                        key={matId}
                        className="p-2 rounded border bg-gray-800/50"
                        style={{ borderColor: rarityStyle?.color }}
                      >
                        <div className="text-sm font-semibold" style={{ color: rarityStyle?.color }}>
                          {drop.name}
                        </div>
                        <div className="text-xs text-gray-400">x{count}</div>
                      </div>
                    );
                  })}
                </div>
              )}
            </ScrollArea>
          </CardContent>
        </Card>
      </div>
    </div>
    </DebugName>
  );
}

FabricatorSubTab.displayName = 'FabricatorSubTab';