<?php

namespace Modules\MaterialsCatalog\Http\Controllers;

use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
use Inertia\Inertia;
use Modules\MasterData\Models\Material;

class KitController extends Controller
{
    /**
     * Display a listing of the resource.
     */
    public function index(Request $request)
    {
        $query = Material::with('components.component')
            ->where(function ($q) {
                $q->where('type', 'kit')
                  ->orWhere('type', 'assembly');
            });

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

        $kits = $query->latest()
            ->paginate(15)
            ->withQueryString();

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

    private function ensureCanManageCatalog(): void
    {
        $user = auth()->user();
        if ($user && $user->hasAnyRole(['Site Technical', 'Construction Supervisor', 'Site Operations', 'Site Engineer', 'Site Supervisor', 'Field Engineer', 'Safety Officer', 'Quality Inspector', 'Warehouse Staff'])) {
            abort(403, 'Unauthorized action. Site Operations roles are restricted from modifying catalog kits.');
        }
    }

    /**
     * Show the form for creating a new resource.
     */
    public function create()
    {
        $this->ensureCanManageCatalog();
        $rawMaterials = Material::where('type', 'single')->get(['id', 'name', 'sku', 'unit', 'unit_cost']);

        return Inertia::render('MaterialsCatalog::MaterialsCatalog/Form', [
            'kit' => null,
            'rawMaterials' => $rawMaterials
        ]);
    }

    /**
     * Store a newly created resource in storage.
     */
    public function store(Request $request)
    {
        $this->ensureCanManageCatalog();
        $validated = $request->validate([
            'name' => 'required|string|max:255',
            'sku' => 'nullable|string|unique:materials,sku',
            'category' => 'nullable|string',
            'description' => 'nullable|string',
            'components' => 'required|array|min:1',
            'components.*.component_id' => 'required|exists:materials,id',
            'components.*.quantity' => 'required|numeric|min:0.001',
        ]);

        $calculatedUnitCost = 0;
        foreach ($validated['components'] as $comp) {
            $mat = Material::find($comp['component_id']);
            if ($mat) {
                $calculatedUnitCost += ($mat->unit_cost * (float)$comp['quantity']);
            }
        }

        $kit = Material::create([
            'name' => $validated['name'],
            'sku' => $validated['sku'],
            'category' => $validated['category'] ?? 'Kit',
            'description' => $validated['description'],
            'unit' => 'kit',
            'type' => 'kit',
            'unit_cost' => $calculatedUnitCost,
        ]);

        $components = [];
        foreach ($validated['components'] as $comp) {
            $components[] = new \Modules\MasterData\Models\MaterialComponent([
                'component_id' => $comp['component_id'],
                'quantity' => $comp['quantity'],
            ]);
        }

        $kit->components()->saveMany($components);

        return redirect()->route('materials-catalog.kits.index')
            ->with('success', 'Kit created successfully.');
    }

    /**
     * Show the specified resource.
     */
    public function show(string $id)
    {
        return redirect()->back(); // Or render a separate show page if needed
    }

    /**
     * Show the form for editing the specified resource.
     */
    public function edit(string $id)
    {
        $this->ensureCanManageCatalog();
        $kit = Material::with('components')->findOrFail($id);
        $rawMaterials = Material::where('type', 'single')->get(['id', 'name', 'sku', 'unit', 'unit_cost']);

        return Inertia::render('MaterialsCatalog::MaterialsCatalog/Form', [
            'kit' => $kit,
            'rawMaterials' => $rawMaterials
        ]);
    }

    /**
     * Update the specified resource in storage.
     */
    public function update(Request $request, string $id)
    {
        $this->ensureCanManageCatalog();
        $kit = Material::findOrFail($id);

        $validated = $request->validate([
            'name' => 'required|string|max:255',
            'sku' => 'nullable|string|unique:materials,sku,' . $kit->id,
            'category' => 'nullable|string',
            'description' => 'nullable|string',
            'components' => 'required|array|min:1',
            'components.*.component_id' => 'required|exists:materials,id',
            'components.*.quantity' => 'required|numeric|min:0.001',
        ]);

        $calculatedUnitCost = 0;
        foreach ($validated['components'] as $comp) {
            $mat = Material::find($comp['component_id']);
            if ($mat) {
                $calculatedUnitCost += ($mat->unit_cost * (float)$comp['quantity']);
            }
        }

        $kit->update([
            'name' => $validated['name'],
            'sku' => $validated['sku'],
            'category' => $validated['category'] ?? 'Kit',
            'description' => $validated['description'],
            'unit_cost' => $calculatedUnitCost,
        ]);

        $kit->components()->delete(); // Clear old components
        
        $components = [];
        foreach ($validated['components'] as $comp) {
            $components[] = new \Modules\MasterData\Models\MaterialComponent([
                'component_id' => $comp['component_id'],
                'quantity' => $comp['quantity'],
            ]);
        }

        $kit->components()->saveMany($components);

        return redirect()->route('materials-catalog.kits.index')
            ->with('success', 'Kit updated successfully.');
    }

    /**
     * Remove the specified resource from storage.
     */
    public function destroy(string $id)
    {
        $this->ensureCanManageCatalog();
        $kit = Material::findOrFail($id);
        $kit->delete();

        return back()->with('success', 'Kit deleted successfully.');
    }
}