<?php

namespace Modules\MaterialLogistics\Http\Controllers;

use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
use Inertia\Inertia;
use Modules\MaterialLogistics\Models\InventoryMovement;
use Modules\MaterialLogistics\Models\Warehouse;
use Modules\ProjectManagement\Models\Project;

class WarehouseController extends Controller
{
    public function index(Request $request)
    {
        $query = Warehouse::whereIn('id', $this->visibleWarehouseIdsQuery());

        if ($search = $request->search) {
            $query->where(function ($q) use ($search) {
                $q->where('name', 'like', "%{$search}%")
                  ->orWhere('code', 'like', "%{$search}%");
            });
        }

        $warehouses = $query->withCount('stock')
            ->latest()
            ->paginate(15)
            ->withQueryString()
            ->through(fn ($w) => $w->append(['total_value', 'item_count']));

        return Inertia::render('MaterialLogistics::Warehouses/Index', [
            'warehouses' => $warehouses,
            'filters' => $request->only(['search']),
        ]);
    }

    public function create()
    {
        return Inertia::render('MaterialLogistics::Warehouses/Form');
    }

    public function show(Request $request, Warehouse $warehouse)
    {
        abort_unless($this->visibleWarehouseIdsQuery()->where('warehouses.id', $warehouse->id)->exists(), 403);

        // Paginated stock with search & category filter
        $stockQuery = $warehouse->stock()->with([
            'material:id,ulid,name,sku,unit,category,type',
            'material.components.component:id,name,unit'
        ]);

        if ($search = $request->search) {
            $stockQuery->whereHas('material', fn ($q) =>
                $q->where('name', 'like', "%{$search}%")
                  ->orWhere('sku', 'like', "%{$search}%")
            );
        }
        if ($category = $request->category) {
            $stockQuery->whereHas('material', fn ($q) => $q->where('category', $category));
        }

        $stock = $stockQuery->paginate(25)->withQueryString();

        // Append is_low_stock to each stock item
        $stock->getCollection()->each(fn ($s) => $s->append('is_low_stock'));

        // Summary stats from full warehouse stock (not filtered)
        $allStock = $warehouse->stock()->with('material:id,category')->get();
        $summary = [
            'total_items'     => $allStock->count(),
            'total_value'     => $allStock->sum(fn ($s) => (float) $s->quantity * (float) $s->unit_cost),
            'categories'      => $allStock->pluck('material.category')->filter()->unique()->count(),
            'low_stock_count' => $allStock->filter(fn ($s) => $s->is_low_stock)->count(),
        ];

        // Distinct categories for filter dropdown
        $categories = $allStock->pluck('material.category')
            ->filter()
            ->unique()
            ->sort()
            ->values();

        // Recent movements for this warehouse
        $movements = InventoryMovement::forWarehouse($warehouse->id)
            ->with(['material:id,ulid,name,sku,unit', 'performer:id,name'])
            ->latest()
            ->paginate(15, ['*'], 'movements_page')
            ->withQueryString();

        return Inertia::render('MaterialLogistics::Warehouses/Show', [
            'warehouse'  => $warehouse,
            'stock'      => $stock,
            'summary'    => $summary,
            'categories' => $categories,
            'movements'  => $movements,
            'filters'    => $request->only(['search', 'category']),
        ]);
    }

    private function visibleWarehouseIdsQuery()
    {
        return Warehouse::query()
            ->whereIn('project_id', Project::query()->select('projects.id'))
            ->select('warehouses.id');
    }

    public function store(Request $request)
    {
        $validated = $request->validate([
            'name' => 'required|string|max:255',
            'code' => 'required|string|max:20|unique:warehouses',
            'address' => 'nullable|string',
            'type' => 'required|in:main,yard,staging',
        ]);

        Warehouse::create($validated);

        return redirect()->route('warehouses.index')->with('success', 'Warehouse created.');
    }

    public function edit(Warehouse $warehouse)
    {
        return Inertia::render('MaterialLogistics::Warehouses/Form', [
            'warehouse' => $warehouse,
        ]);
    }

    public function update(Request $request, Warehouse $warehouse)
    {
        $validated = $request->validate([
            'name' => 'required|string|max:255',
            'code' => "required|string|max:20|unique:warehouses,code,{$warehouse->id}",
            'address' => 'nullable|string',
            'type' => 'required|in:main,yard,staging',
            'status' => 'nullable|in:active,inactive',
        ]);

        $warehouse->update($validated);

        return redirect()->route('warehouses.index')->with('success', 'Warehouse updated.');
    }

    /**
     * JSON API: warehouse stock for selects and dispatching.
     */
    public function stockSummary(Request $request)
    {
        $request->validate([
            'warehouse_ulid' => 'required|string',
        ]);

        $warehouse = Warehouse::where('ulid', $request->warehouse_ulid)->firstOrFail();

        $stock = $warehouse->stock()
            ->with([
                'material:id,ulid,name,sku,unit,category,type',
                'material.components.component:id,name,unit'
            ])
            ->where('quantity', '>', 0)
            ->get()
            ->map(fn ($s) => [
                'material' => $s->material,
                'quantity' => $s->quantity,
                'reserved_qty' => $s->reserved_qty,
                'available_qty' => $s->available_qty,
                'unit_cost' => $s->unit_cost,
            ]);

        return response()->json($stock);
    }
}