<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use App\Models\Announcement;
use App\Models\Sponsor;
use Illuminate\Http\Request;

class SponsorController extends Controller
{
    /**
     * GET /api/sponsors/dashboard
     *
     * Returns the sponsor's profile summary and unread charity event count.
     */
    public function getDashboard(Request $request)
    {
        /** @var Sponsor $sponsor */
        $sponsor = $request->attributes->get('sponsor');
        $sponsorId = $sponsor ? $sponsor->id : null;

        try {
            // Recent charity/update announcements for the dashboard preview
            $recentEvents = Announcement::where(function ($q) use ($sponsorId) {
                    $q->where('status', 'approved');
                    if ($sponsorId) {
                        $q->orWhere('sponsor_id', $sponsorId);
                    }
                })
                ->latest()
                ->limit(5)
                ->get()
                ->map(function ($event) {
                    $content = $event->body;
                    if (strpos($event->body, '{"type":"Charity"') === 0) {
                        $decoded = json_decode($event->body, true);
                        if ($decoded) {
                            $content = $decoded['content'] ?? $event->body;
                        }
                    }
                    return [
                        'id'         => $event->id,
                        'title'      => $event->title,
                        'body'       => $content,
                        'type'       => strtolower($event->type),
                        'status'     => $event->status ?? 'pending',
                        'created_at' => $event->created_at->toIso8601String(),
                        'time_ago'   => $event->created_at->diffForHumans(),
                    ];
                });

            return response()->json([
                'success' => true,
                'data'    => [
                    'sponsor'            => [
                        'id'                => $sponsor->id,
                        'full_name'         => $sponsor->full_name,
                        'organization_name' => $sponsor->organization_name,
                        'mobile'            => $sponsor->mobile,
                        'email'             => $sponsor->email,
                        'city'              => $sponsor->city,
                        'nationality'       => $sponsor->nationality,
                        'is_verified'       => $sponsor->is_verified,
                        'status'            => $sponsor->status,
                        'license_file'      => $sponsor->license_file ? asset($sponsor->license_file) : null,
                        'emirates_id_file'  => $sponsor->emirates_id_file ? asset($sponsor->emirates_id_file) : null,
                        'license_expiry'    => $sponsor->license_expiry ? $sponsor->license_expiry->toDateString() : null,
                        'validity'          => $sponsor->license_expiry ? ($sponsor->license_expiry->isFuture() ? 'Valid' : 'Expired') : 'Pending Review',
                        'joined_at'         => $sponsor->created_at->toIso8601String(),
                    ],
                    'recent_charity_events' => $recentEvents,
                    'total_events'          => Announcement::where(function ($q) use ($sponsorId) {
                        $q->where('status', 'approved');
                        if ($sponsorId) {
                            $q->orWhere('sponsor_id', $sponsorId);
                        }
                    })->count(),
                    'employer_stats'        => [
                        'total'  => \App\Models\User::where('role', 'employer')->count(),
                        'active' => \App\Models\User::where('role', 'employer')->where('subscription_status', 'active')->count(),
                    ],
                    'worker_stats'          => [
                        'total'  => \App\Models\Worker::count(),
                        'active' => \App\Models\Worker::where('status', 'active')->count(),
                    ],
                ]
            ], 200);

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

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

    /**
     * GET /api/sponsors/charity-events
     *
     * Returns a paginated list of all charity/announcement events.
     */
    public function getCharityEvents(Request $request)
    {
        try {
            $page    = (int) $request->input('page', 1);
            $perPage = (int) $request->input('per_page', 15);
            $type    = $request->input('type'); // optional filter: 'charity', 'update', etc.

            /** @var Sponsor $sponsor */
            $sponsor = $request->attributes->get('sponsor');
            $sponsorId = $sponsor ? $sponsor->id : null;

            $query = Announcement::with(['employer.employerProfile', 'sponsor'])
                ->where(function ($q) use ($sponsorId) {
                    $q->where('status', 'approved');
                    if ($sponsorId) {
                        $q->orWhere('sponsor_id', $sponsorId);
                    }
                })
                ->latest();

            if ($type) {
                if (strtolower($type) === 'charity') {
                    $query->whereIn('type', ['charity', 'Charity']);
                } else {
                    $query->where('type', $type);
                }
            }

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

            $events = $query->skip($offset)->take($perPage)->get()
                ->map(function ($event) {
                    $postedBy = 'System';
                    $organization = 'Migrant Support';

                    if ($event->sponsor_id) {
                        $postedBy = $event->sponsor->full_name;
                        $organization = $event->sponsor->organization_name;
                    } elseif ($event->employer_id) {
                        $postedBy = $event->employer->name;
                        $organization = optional($event->employer)->employerProfile->company_name ?? 'Migrant Support';
                    }

                    // Decode charity details if they exist in json
                    $charityDetails = null;
                    $content = $event->body;
                    if (strpos($event->body, '{"type":"Charity"') === 0) {
                        $decoded = json_decode($event->body, true);
                        if ($decoded) {
                            $charityDetails = $decoded;
                            $content = $decoded['content'] ?? $event->body;
                        }
                    }

                    return [
                        'id'              => $event->id,
                        'title'           => $event->title,
                        'body'            => $content,
                        'type'            => strtolower($event->type),
                        'status'          => $event->status ?? 'pending',
                        'remarks'         => $event->remarks,
                        'posted_by'       => $postedBy,
                        'organization'    => $organization,
                        'created_at'      => $event->created_at->toIso8601String(),
                        'time_ago'        => $event->created_at->diffForHumans(),
                        'charity_details' => $charityDetails,
                    ];
                });

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

        } catch (\Exception $e) {
            logger()->error('Sponsor Charity Events API Failure: ' . $e->getMessage());

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

    /**
     * POST /api/sponsors/charity-events
     *
     * Creates/Posts a new charity event for the authenticated sponsor.
     */
    public function postCharityEvent(Request $request)
    {
        /** @var Sponsor $sponsor */
        $sponsor = $request->attributes->get('sponsor');

        if (!$sponsor) {
            return response()->json([
                'success' => false,
                'message' => 'Unauthorized.'
            ], 401);
        }

        $validator = \Illuminate\Support\Facades\Validator::make($request->all(), [
            'title'            => 'required|string|max:255',
            'body'             => 'required|string',
            'type'             => 'nullable|string|in:charity,info,warning,success',
            'event_date'       => 'required|string',
            'start_time'       => 'required|string',
            'end_time'         => 'required|string',
            'provided_items'   => 'required|string',
            'location_details' => 'required|string',
            'location_pin'     => 'required|string|url',
        ]);

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

        try {
            $eventTime = $request->start_time . ' - ' . $request->end_time;

            $bodyJson = json_encode([
                'type'             => 'Charity',
                'provided_items'   => $request->provided_items,
                'event_date'       => $request->event_date,
                'event_time'       => $eventTime,
                'location_details' => $request->location_details,
                'location_pin'     => $request->location_pin,
                'content'          => $request->body,
            ]);

            $event = Announcement::create([
                'title'      => $request->title,
                'body'       => $bodyJson,
                'type'       => $request->type ?? 'charity',
                'sponsor_id' => $sponsor->id,
                'status'     => 'pending',
            ]);

            // Decode charity details for the response representation
            $charityDetails = null;
            $content = $event->body;
            if (strpos($event->body, '{"type":"Charity"') === 0) {
                $decoded = json_decode($event->body, true);
                if ($decoded) {
                    $charityDetails = $decoded;
                    $content = $decoded['content'] ?? $event->body;
                }
            }

            return response()->json([
                'success' => true,
                'message' => 'Charity event posted successfully.',
                'data'    => [
                    'id'              => $event->id,
                    'title'           => $event->title,
                    'body'            => $content,
                    'type'            => strtolower($event->type),
                    'posted_by'       => $sponsor->full_name,
                    'organization'    => $sponsor->organization_name,
                    'created_at'      => $event->created_at->toIso8601String(),
                    'charity_details' => $charityDetails,
                ]
            ], 201);

        } catch (\Exception $e) {
            logger()->error('Sponsor Post Charity Event API Failure: ' . $e->getMessage());

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

    /**
     * GET /api/sponsors/profile
     *
     * Returns the authenticated sponsor's full profile.
     */
    public function getProfile(Request $request)
    {
        /** @var Sponsor $sponsor */
        $sponsor = $request->attributes->get('sponsor');

        return response()->json([
            'success' => true,
            'data'    => [
                'sponsor' => [
                    'id'                => $sponsor->id,
                    'full_name'         => $sponsor->full_name,
                    'organization_name' => $sponsor->organization_name,
                    'mobile'            => $sponsor->mobile,
                    'email'             => $sponsor->email,
                    'nationality'       => $sponsor->nationality,
                    'city'              => $sponsor->city,
                    'address'           => $sponsor->address,
                    'country_code'      => $sponsor->country_code,
                    'is_verified'       => $sponsor->is_verified,
                    'status'            => $sponsor->status,
                    'license_file'      => $sponsor->license_file ? asset($sponsor->license_file) : null,
                    'emirates_id_file'  => $sponsor->emirates_id_file ? asset($sponsor->emirates_id_file) : null,
                    'license_expiry'    => $sponsor->license_expiry ? $sponsor->license_expiry->toDateString() : null,
                    'validity'          => $sponsor->license_expiry ? ($sponsor->license_expiry->isFuture() ? 'Valid' : 'Expired') : 'Pending Review',
                    'joined_at'         => $sponsor->created_at->toIso8601String(),
                ]
            ]
        ], 200);
    }
}