<?php

namespace App\Http\Controllers;

use App\Events\MessageSent;
use App\Events\MutationCreated;
use App\Events\MutationUpdated;
use App\Http\Requests\StoreMutationRequest;
use App\Models\Dynamic;
use App\Models\Ledger;
use App\Models\Mutation;
use App\Notifications\NewActivityNotification;
use Illuminate\Foundation\Auth\Access\AuthorizesRequests;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Notification;

class MutationController extends Controller
{
    use AuthorizesRequests;

    public function store(StoreMutationRequest $request, Dynamic $dynamic, Ledger $ledger)
    {
        $this->authorize('create', [Mutation::class, $ledger]);

        $status = $request->user()->can('update', $ledger) ? 'approved' : 'pending';

        $mutation = DB::transaction(function () use ($request, $ledger, $status) {
            $predefinedId = null;
            if ($request->filled('predefined_mutation_id')) {
                $predefinedId = \App\Models\PredefinedMutation::where('uuid', $request->input('predefined_mutation_id'))->value('id');
            }

            $mutation = $ledger->mutations()->create([
                ...$request->except(['media', 'type', 'status', 'predefined_mutation_id']),
                'predefined_mutation_id' => $predefinedId,
                'user_id' => $request->user()->id,
                'type' => $request->input('type', $request->input('amount') >= 0 ? 'addition' : 'subtraction'),
                'status' => $status,
            ]);

            if ($request->hasFile('media')) {
                foreach ($request->file('media') as $file) {
                    $path = $file->store('media', 'public');
                    $mutation->media()->create([
                        'file_path' => $path,
                        'file_name' => $file->getClientOriginalName(),
                        'mime_type' => $file->getMimeType(),
                    ]);
                }
            }

            if ($status === 'approved') {
                $ledger->increment('score', $request->validated('amount'));
            }

            return $mutation;
        });

        $recipients = $dynamic->participants()->where('users.id', '!=', $request->user()->id)->get();
        $message = $status === 'approved'
            ? "{$request->user()->name} added a new entry: \"{$mutation->description}\"."
            : "{$request->user()->name} suggested a new entry: \"{$mutation->description}\".";

        if ($recipients->isNotEmpty()) {
            Notification::send($recipients, new NewActivityNotification([
                'content' => $message,
                'url' => route('dynamics.ledgers.show', [$dynamic, $ledger]),
            ]));
        }

        return redirect()->route('dynamics.ledgers.show', [$dynamic, $ledger]);
    }

    public function show(Request $request, Dynamic $dynamic, Ledger $ledger, Mutation $mutation)
    {
        $this->authorize('view', $mutation);

        $mutation->load('user', 'ledger', 'media', 'chat.messages.user');
        $dynamic = $mutation->ledger->dynamic;

        $dynamic->load('participants');

        return inertia('Mutations/Show', [
            'mutation' => $mutation,
            'dynamic' => $dynamic,
        ]);
    }

    public function update(Request $request, Dynamic $dynamic, Ledger $ledger, Mutation $mutation)
    {
        $this->authorize('update', $mutation);

        $request->validate(['status' => ['required', 'string', 'in:approved,rejected']]);

        $oldStatus = $mutation->status;
        $newStatus = $request->input('status');

        DB::transaction(function () use ($mutation, $ledger, $oldStatus, $newStatus) {
            $mutation->update(['status' => $newStatus]);

            if ($oldStatus !== 'approved' && $newStatus === 'approved') {
                $ledger->increment('score', $mutation->amount);
            } elseif ($oldStatus === 'approved' && $newStatus !== 'approved') {
                $ledger->decrement('score', $mutation->amount);
            }
        });

        $user = $request->user();
        $statusText = strtoupper($newStatus);

        // Notify the suggester
        $suggester = $mutation->user;
        if ($suggester && $suggester->id !== $user->id) {
            Notification::send($suggester, new NewActivityNotification([
                'content' => "Your suggestion \"{$mutation->description}\" was {$statusText} by {$user->name}.",
                'url' => route('dynamics.ledgers.show', [$dynamic, $ledger]),
            ]));
        }

        return redirect()->back();
    }

    public function void(Request $request, Dynamic $dynamic, Ledger $ledger, Mutation $mutation)
    {
        $this->authorize('void', $mutation);

        DB::transaction(function() use ($mutation, $ledger) {
            if ($mutation->status === 'approved') {
                $ledger->decrement('score', $mutation->amount);
            }
            $mutation->update(['status' => 'voided']);
        });

        $recipients = $dynamic->participants()->where('users.id', '!=', $request->user()->id)->get();
        if ($recipients->isNotEmpty()) {
            Notification::send($recipients, new NewActivityNotification([
                'content' => "{$request->user()->name} voided an entry: \"{$mutation->description}\".",
                'url' => route('dynamics.ledgers.show', [$dynamic, $ledger]),
            ]));
        }

        return redirect()->route('dynamics.ledgers.show', [$dynamic, $ledger]);
    }
}