<?php

namespace App\Infrastructure\Http\Controllers\API\CalendarSlot;

use App\Domain\CalendarSlot\Policies\CalendarSlotPolicy;
use App\Infrastructure\Http\Controllers\Controller;
use App\Models\CalendarSlot;
use App\Models\Trip;
use App\Models\PlannedItem;
use Illuminate\Http\Request;
use Illuminate\Http\JsonResponse;

class CalendarSlotController extends Controller
{
    public function __construct(
        private CalendarSlotPolicy $policy
    ) {}
    public function index(Trip $trip): JsonResponse
    {
        if (!$this->policy->viewAny(auth()->user(), $trip)) {
            return response()->json(['message' => 'Forbidden'], 403);
        }

        $calendarSlots = $trip->calendarSlots()
            ->with(['plannedItems.plannableItem'])
            ->orderBy('slot_date')
            ->orderBy('datetime_start')
            ->get();

        return response()->json(['data' => $calendarSlots]);
    }

    public function update(Request $request, CalendarSlot $calendarSlot): JsonResponse
    {
        if (!$this->policy->update(auth()->user(), $calendarSlot)) {
            return response()->json(['message' => 'Forbidden'], 403);
        }

        $validated = $request->validate([
            'name' => 'sometimes|required|string|max:255',
        ]);

        $calendarSlot->update($validated);

        return response()->json(['data' => $calendarSlot]);
    }

    public function reorder(Request $request, CalendarSlot $calendarSlot): JsonResponse
    {
        if (!$this->policy->reorder(auth()->user(), $calendarSlot)) {
            return response()->json(['message' => 'Forbidden'], 403);
        }

        $validated = $request->validate([
            'items' => 'required|array',
            'items.*.plannable_item_id' => 'required|exists:plannable_items,id',
            'items.*.sort_order' => 'required|integer',
        ]);

        // Validate all plannable items belong to the same trip
        $trip = $calendarSlot->trip;
        $validPlannableItemIds = $trip->plannableItems()->pluck('id')->toArray();

        foreach ($validated['items'] as $item) {
            if (!in_array($item['plannable_item_id'], $validPlannableItemIds)) {
                return response()->json(['message' => 'Invalid plannable item for this trip'], 422);
            }
        }

        // Update sort orders in transaction
        \DB::transaction(function () use ($validated, $calendarSlot) {
            foreach ($validated['items'] as $item) {
                PlannedItem::where('calendar_slot_id', $calendarSlot->id)
                    ->where('plannable_item_id', $item['plannable_item_id'])
                    ->update(['sort_order' => $item['sort_order']]);
            }
        });

        return response()->json(['message' => 'Items reordered successfully']);
    }
}