<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
use App\Models\User;
use App\Models\Worker;
use App\Models\Review;
use Illuminate\Support\Facades\Validator;

class EmployerReviewController extends Controller
{
    /**
     * Add a new review for a worker.
     * POST /api/employers/reviews
     */
    public function addReview(Request $request)
    {
        /** @var User $employer */
        $employer = $request->attributes->get('employer');

        $validator = Validator::make($request->all(), [
            'worker_id' => 'required|exists:workers,id',
            'rating' => 'required|integer|min:1|max:5',
            'comment' => 'nullable|string|max:1000',
        ]);

        if ($validator->fails()) {
            return response()->json([
                'success' => false,
                'message' => 'Validation error.',
                'errors' => $validator->errors()
            ], 422);
        }

        try {
            // 1. Validate confirmed hire and completed joining, and review eligibility period
            $hasConfirmedHire = false;
            $joiningDate = null;

            // Check standard JobApplication where the job belongs to this employer and worker matches
            $app = \App\Models\JobApplication::where('worker_id', $request->worker_id)
                ->where('status', 'hired')
                ->whereNotNull('joining_confirmed_at')
                ->whereHas('jobPost', function ($query) use ($employer) {
                    $query->where('employer_id', $employer->id);
                })
                ->first();

            if ($app) {
                $hasConfirmedHire = true;
                $joiningDate = \Carbon\Carbon::parse($app->joining_confirmed_at);
            } else {
                // Check direct JobOffer
                $offer = \App\Models\JobOffer::where('worker_id', $request->worker_id)
                    ->where('employer_id', $employer->id)
                    ->where('status', 'accepted')
                    ->first();

                if ($offer) {
                    $hasConfirmedHire = true;
                    $joiningDate = $offer->work_date ? \Carbon\Carbon::parse($offer->work_date) : $offer->updated_at;
                }
            }

            if (!$hasConfirmedHire) {
                return response()->json([
                    'success' => false,
                    'message' => 'You can only review workers with a confirmed hire and completed joining.'
                ], 403);
            }

            // Verify if completed configured period from joining date
            $eligibilityMinutes = config('reminders.review_eligibility_minutes');
            if ($eligibilityMinutes !== null && $eligibilityMinutes > 0) {
                if ($joiningDate->diffInMinutes(now(), false) < $eligibilityMinutes) {
                    return response()->json([
                        'success' => false,
                        'message' => "You can write a review only after {$eligibilityMinutes} minutes from the joining date."
                    ], 403);
                }
            } else {
                $eligibilityMonths = (int) config('reminders.review_eligibility_months', 3);
                if ($joiningDate->startOfDay()->diffInMonths(now()->startOfDay(), false) < $eligibilityMonths) {
                    return response()->json([
                        'success' => false,
                        'message' => "You can write a review only after {$eligibilityMonths} months from the joining date."
                    ], 403);
                }
            }

            // Check if employer has already reviewed this worker
            $existingReview = Review::where('employer_id', $employer->id)
                ->where('worker_id', $request->worker_id)
                ->first();

            if ($existingReview) {
                // Check if the edit window has expired
                $editPeriodDays = (int) config('reminders.review_edit_period_days', 7);
                if ($existingReview->created_at->addDays($editPeriodDays)->isPast()) {
                    return response()->json([
                        'success' => false,
                        'message' => "The {$editPeriodDays}-day edit window for this review has expired."
                    ], 403);
                }

                // If they already have a review, we can update it or direct them to the edit endpoint.
                // To be robust, let's update it directly and inform them it was updated (acting as an edit).
                $existingReview->update([
                    'rating' => $request->rating,
                    'comment' => $request->comment,
                ]);

                return response()->json([
                    'success' => true,
                    'message' => 'Review updated successfully (existing review updated).',
                    'data' => [
                        'review' => $existingReview
                    ]
                ], 200);
            }

            // Create new review
            $review = Review::create([
                'employer_id' => $employer->id,
                'worker_id' => $request->worker_id,
                'rating' => $request->rating,
                'comment' => $request->comment,
            ]);

            return response()->json([
                'success' => true,
                'message' => 'Review added successfully.',
                'data' => [
                    'review' => $review
                ]
            ], 201);

        } catch (\Exception $e) {
            logger()->error('Mobile API Add Review Failure: ' . $e->getMessage());

            return response()->json([
                'success' => false,
                'message' => 'An error occurred while adding the review.',
                'error' => app()->environment('local') ? $e->getMessage() : 'Internal Server Error'
            ], 500);
        }
    }

    /**
     * Edit/update an existing review.
     * PUT /api/employers/reviews/{id}
     */
    public function editReview(Request $request, $id)
    {
        /** @var User $employer */
        $employer = $request->attributes->get('employer');

        $validator = Validator::make($request->all(), [
            'rating' => 'required|integer|min:1|max:5',
            'comment' => 'nullable|string|max:1000',
        ]);

        if ($validator->fails()) {
            return response()->json([
                'success' => false,
                'message' => 'Validation error.',
                'errors' => $validator->errors()
            ], 422);
        }

        try {
            $review = Review::where('id', $id)
                ->where('employer_id', $employer->id)
                ->first();

            if (!$review) {
                return response()->json([
                    'success' => false,
                    'message' => 'Review not found or unauthorized.'
                ], 404);
            }

            // Check if the edit window has expired
            $editPeriodDays = (int) config('reminders.review_edit_period_days', 7);
            if ($review->created_at->addDays($editPeriodDays)->isPast()) {
                return response()->json([
                    'success' => false,
                    'message' => "The {$editPeriodDays}-day edit window for this review has expired."
                ], 403);
            }

            $review->update([
                'rating' => $request->rating,
                'comment' => $request->comment,
            ]);

            return response()->json([
                'success' => true,
                'message' => 'Review edited successfully.',
                'data' => [
                    'review' => $review
                ]
            ], 200);

        } catch (\Exception $e) {
            logger()->error('Mobile API Edit Review Failure: ' . $e->getMessage());

            return response()->json([
                'success' => false,
                'message' => 'An error occurred while updating the review.',
                'error' => app()->environment('local') ? $e->getMessage() : 'Internal Server Error'
            ], 500);
        }
     }

    /**
     * Get reviews posted by this employer.
     * GET /api/employers/reviews
     */
    public function getReviews(Request $request)
    {
        /** @var User $employer */
        $employer = $request->attributes->get('employer');

        try {
            $page = (int)$request->input('page', 1);
            $perPage = (int)$request->input('per_page', 15);

            $query = Review::where('employer_id', $employer->id)
                ->with('worker')
                ->latest();

            $total = $query->count();
            $offset = ($page - 1) * $perPage;

            $reviews = $query->skip($offset)->take($perPage)->get()
                ->map(function ($rev) {
                    return [
                        'id' => $rev->id,
                        'worker_id' => $rev->worker_id,
                        'worker_name' => $rev->worker->name ?? 'Worker',
                        'rating' => $rev->rating,
                        'comment' => $rev->comment,
                        'created_at' => $rev->created_at->toISOString(),
                        'time_ago' => $rev->created_at->diffForHumans(),
                    ];
                });

            return response()->json([
                'success' => true,
                'data' => [
                    'reviews' => $reviews,
                    'pagination' => [
                        'total' => $total,
                        'per_page' => $perPage,
                        'current_page' => $page,
                        'last_page' => max(1, (int)ceil($total / $perPage)),
                    ]
                ]
            ], 200);

        } catch (\Exception $e) {
            logger()->error('Mobile API Get Employer Reviews Failure: ' . $e->getMessage());

            return response()->json([
                'success' => false,
                'message' => 'An error occurred while fetching reviews.',
                'error' => app()->environment('local') ? $e->getMessage() : 'Internal Server Error'
            ], 500);
        }
    }
}