<?php namespace App\Http\Controllers;

use Auth;
use Session;
use Utils;
use View;
use Input;
use Cache;
use Redirect;
use DB;
use Event;
use URL;
use Datatable;
use Request;
use DropdownButton;
use App\Models\Invoice;
use App\Models\Client;
use App\Models\Account;
use App\Models\Product;
use App\Models\TaxRate;
use App\Models\InvoiceDesign;
use App\Models\Activity;
use App\Ninja\Mailers\ContactMailer as Mailer;
use App\Ninja\Repositories\InvoiceRepository;
use App\Ninja\Repositories\ClientRepository;
use App\Services\InvoiceService;
use App\Services\RecurringInvoiceService;
use App\Http\Requests\SaveInvoiceWithClientRequest;

class InvoiceController extends BaseController
{
    protected $mailer;
    protected $invoiceRepo;
    protected $clientRepo;
    protected $invoiceService;
    protected $recurringInvoiceService;

    public function __construct(Mailer $mailer, InvoiceRepository $invoiceRepo, ClientRepository $clientRepo, InvoiceService $invoiceService, RecurringInvoiceService $recurringInvoiceService)
    {
        parent::__construct();

        $this->mailer = $mailer;
        $this->invoiceRepo = $invoiceRepo;
        $this->clientRepo = $clientRepo;
        $this->invoiceService = $invoiceService;
        $this->recurringInvoiceService = $recurringInvoiceService;
    }

    public function index()
    {
        $data = [
            'title' => trans('texts.invoices'),
            'entityType' => ENTITY_INVOICE,
            'columns' => Utils::trans([
                'checkbox',
                'invoice_number',
                'client',
                'invoice_date',
                'invoice_total',
                'balance_due',
                'due_date',
                'status',
                ''
            ]),
        ];

        return response()->view('list', $data);
    }

    public function getDatatable($clientPublicId = null)
    {
        $accountId = Auth::user()->account_id;
        $search = Input::get('sSearch');

        return $this->invoiceService->getDatatable($accountId, $clientPublicId, ENTITY_INVOICE, $search);
    }

    public function getRecurringDatatable($clientPublicId = null)
    {
        $accountId = Auth::user()->account_id;
        $search = Input::get('sSearch');

        return $this->recurringInvoiceService->getDatatable($accountId, $clientPublicId, ENTITY_RECURRING_INVOICE, $search);
    }

    public function edit($publicId, $clone = false)
    {
        $account = Auth::user()->account;
        $invoice = Invoice::scope($publicId)
                        ->with('invitations', 'account.country', 'client.contacts', 'client.country', 'invoice_items')
                        ->withTrashed()
                        ->firstOrFail();
        $entityType = $invoice->getEntityType();

        $contactIds = DB::table('invitations')
            ->join('contacts', 'contacts.id', '=', 'invitations.contact_id')
            ->where('invitations.invoice_id', '=', $invoice->id)
            ->where('invitations.account_id', '=', Auth::user()->account_id)
            ->where('invitations.deleted_at', '=', null)
            ->select('contacts.public_id')->lists('public_id');

        if ($clone) {
            $invoice->id = $invoice->public_id = null;
            $invoice->invoice_number = $account->getNextInvoiceNumber($invoice);
            $invoice->balance = $invoice->amount;
            $invoice->invoice_status_id = 0;
            $invoice->invoice_date = date_create()->format('Y-m-d');
            $method = 'POST';
            $url = "{$entityType}s";
        } else {
            Utils::trackViewed($invoice->getDisplayName().' - '.$invoice->client->getDisplayName(), $invoice->getEntityType());
            $method = 'PUT';
            $url = "{$entityType}s/{$publicId}";
        }

        $invoice->invoice_date = Utils::fromSqlDate($invoice->invoice_date);
        $invoice->recurring_due_date = $invoice->due_date;// Keep in SQL form
        $invoice->due_date = Utils::fromSqlDate($invoice->due_date);
        $invoice->start_date = Utils::fromSqlDate($invoice->start_date);
        $invoice->end_date = Utils::fromSqlDate($invoice->end_date);
        $invoice->last_sent_date = Utils::fromSqlDate($invoice->last_sent_date);
        $invoice->is_pro = Auth::user()->isPro();

        $actions = [
            ['url' => 'javascript:onCloneClick()', 'label' => trans("texts.clone_{$entityType}")],
            ['url' => URL::to("{$entityType}s/{$entityType}_history/{$invoice->public_id}"), 'label' => trans("texts.view_history")],
            DropdownButton::DIVIDER
        ];

        if ($invoice->invoice_status_id < INVOICE_STATUS_SENT && !$invoice->is_recurring) {
            $actions[] = ['url' => 'javascript:onMarkClick()', 'label' => trans("texts.mark_sent")];
        }

        if ($entityType == ENTITY_QUOTE) {
            if ($invoice->quote_invoice_id) {
                $actions[] = ['url' => URL::to("invoices/{$invoice->quote_invoice_id}/edit"), 'label' => trans("texts.view_invoice")];
            } else {
                $actions[] = ['url' => 'javascript:onConvertClick()', 'label' => trans("texts.convert_to_invoice")];
            }
        } elseif ($entityType == ENTITY_INVOICE) {
            if ($invoice->quote_id) {
                $actions[] = ['url' => URL::to("quotes/{$invoice->quote_id}/edit"), 'label' => trans("texts.view_quote")];
            }

            if (!$invoice->is_recurring && $invoice->balance > 0) {
                $actions[] = ['url' => 'javascript:onPaymentClick()', 'label' => trans('texts.enter_payment')];
            }
        }

        if (count($actions) > 3) {
            $actions[] = DropdownButton::DIVIDER;
        }

        $actions[] = ['url' => 'javascript:onArchiveClick()', 'label' => trans("texts.archive_{$entityType}")];
        $actions[] = ['url' => 'javascript:onDeleteClick()', 'label' => trans("texts.delete_{$entityType}")];

        $lastSent = ($invoice->is_recurring && $invoice->last_sent_date) ? $invoice->recurring_invoices->last() : null;

        $data = array(
                'clients' => Client::scope()->withTrashed()->with('contacts', 'country')->whereId($invoice->client_id)->get(),
                'entityType' => $entityType,
                'showBreadcrumbs' => $clone,
                'invoice' => $invoice,
                'method' => $method,
                'invitationContactIds' => $contactIds,
                'url' => $url,
                'title' => trans("texts.edit_{$entityType}"),
                'client' => $invoice->client,
                'isRecurring' => $invoice->is_recurring,
                'actions' => $actions,
                'lastSent' => $lastSent);
        $data = array_merge($data, self::getViewModel());

        if ($clone) {
            $data['formIsChanged'] = true;
        }

        // Set the invitation data on the client's contacts
        if (!$clone) {
            $clients = $data['clients'];
            foreach ($clients as $client) {
                if ($client->id != $invoice->client->id) {
                    continue;
                }

                foreach ($invoice->invitations as $invitation) {
                    foreach ($client->contacts as $contact) {
                        if ($invitation->contact_id == $contact->id) {
                            $contact->email_error = $invitation->email_error;
                            $contact->invitation_link = $invitation->getLink();
                            $contact->invitation_viewed = $invitation->viewed_date && $invitation->viewed_date != '0000-00-00 00:00:00' ? $invitation->viewed_date : false;
                            $contact->invitation_status = $contact->email_error ? false : $invitation->getStatus();
                        }
                    }
                }

                break;
            }
        }

        return View::make('invoices.edit', $data);
    }

    public function create($clientPublicId = 0, $isRecurring = false)
    {
        $account = Auth::user()->account;
        $entityType = $isRecurring ? ENTITY_RECURRING_INVOICE : ENTITY_INVOICE;
        $clientId = null;

        if ($clientPublicId) {
            $clientId = Client::getPrivateId($clientPublicId);
        }

        $invoice = $account->createInvoice($entityType, $clientId);
        $invoice->public_id = 0;

        $data = [
            'clients' => Client::scope()->with('contacts', 'country')->orderBy('name')->get(),
            'entityType' => $invoice->getEntityType(),
            'invoice' => $invoice,
            'method' => 'POST',
            'url' => 'invoices',
            'title' => trans('texts.new_invoice'),
        ];
        $data = array_merge($data, self::getViewModel());

        return View::make('invoices.edit', $data);
    }

    public function createRecurring($clientPublicId = 0)
    {
        return self::create($clientPublicId, true);
    }

    private static function getViewModel()
    {
        $recurringHelp = '';
        foreach (preg_split("/((\r?\n)|(\r\n?))/", trans('texts.recurring_help')) as $line) {
            $parts = explode("=>", $line);
            if (count($parts) > 1) {
                $line = $parts[0].' => '.Utils::processVariables($parts[0]);
                $recurringHelp .= '<li>'.strip_tags($line).'</li>';
            } else {
                $recurringHelp .= $line;
            }
        }

        $recurringDueDateHelp = '';
        foreach (preg_split("/((\r?\n)|(\r\n?))/", trans('texts.recurring_due_date_help')) as $line) {
            $parts = explode("=>", $line);
            if (count($parts) > 1) {
                $line = $parts[0].' => '.Utils::processVariables($parts[0]);
                $recurringDueDateHelp .= '<li>'.strip_tags($line).'</li>';
            } else {
                $recurringDueDateHelp .= $line;
            }
        }

        // Create due date options
        $recurringDueDates = array(
            trans('texts.use_client_terms') => array('value' => '', 'class' => 'monthly weekly'),
        );

        $ends = array('th','st','nd','rd','th','th','th','th','th','th');
        for($i = 1; $i < 31; $i++){
            if ($i >= 11 && $i <= 13) $ordinal = $i. 'th';
            else $ordinal = $i . $ends[$i % 10];

            $dayStr = str_pad($i, 2, '0', STR_PAD_LEFT);
            $str = trans('texts.day_of_month', array('ordinal'=>$ordinal));

            $recurringDueDates[$str] = array('value' => "1998-01-$dayStr", 'data-num' => $i, 'class' => 'monthly');
        }
        $recurringDueDates[trans('texts.last_day_of_month')] = array('value' => "1998-01-31", 'data-num' => 31, 'class' => 'monthly');


        $daysOfWeek = array(
            trans('texts.sunday'),
            trans('texts.monday'),
            trans('texts.tuesday'),
            trans('texts.wednesday'),
            trans('texts.thursday'),
            trans('texts.friday'),
            trans('texts.saturday'),
        );
        foreach(array('1st','2nd','3rd','4th') as $i=>$ordinal){
            foreach($daysOfWeek as $j=>$dayOfWeek){
                $str = trans('texts.day_of_week_after', array('ordinal' => $ordinal, 'day' => $dayOfWeek));

                $day = $i * 7 + $j  + 1;
                $dayStr = str_pad($day, 2, '0', STR_PAD_LEFT);
                $recurringDueDates[$str] = array('value' => "1998-02-$dayStr", 'data-num' => $day, 'class' => 'weekly');
            }
        }

        return [
            'data' => Input::old('data'),
            'account' => Auth::user()->account->load('country'),
            'products' => Product::scope()->with('default_tax_rate')->orderBy('id')->get(),
            'taxRates' => TaxRate::scope()->orderBy('name')->get(),
            'currencies' => Cache::get('currencies'),
            'languages' => Cache::get('languages'),
            'sizes' => Cache::get('sizes'),
            'paymentTerms' => Cache::get('paymentTerms'),
            'industries' => Cache::get('industries'),
            'invoiceDesigns' => InvoiceDesign::getDesigns(),
            'invoiceFonts' => Cache::get('fonts'),
            'frequencies' => array(
                1 => 'Weekly',
                2 => 'Two weeks',
                3 => 'Four weeks',
                4 => 'Monthly',
                5 => 'Three months',
                6 => 'Six months',
                7 => 'Annually',
            ),
            'recurringDueDates' => $recurringDueDates,
            'recurringHelp' => $recurringHelp,
            'recurringDueDateHelp' => $recurringDueDateHelp,
            'invoiceLabels' => Auth::user()->account->getInvoiceLabels(),
            'tasks' => Session::get('tasks') ? json_encode(Session::get('tasks')) : null,
            'expenses' => Session::get('expenses') ? json_encode(Session::get('expenses')) : null,
        ];

    }

    /**
     * Store a newly created resource in storage.
     *
     * @return Response
     */
    public function store(SaveInvoiceWithClientRequest $request)
    {
        $action = Input::get('action');
        $entityType = Input::get('entityType');
        
        $invoice = $this->invoiceService->save($request->input());
        $entityType = $invoice->getEntityType();
        $message = trans("texts.created_{$entityType}");

        // check if we created a new client with the invoice
        // TODO: replace with HistoryListener
        $input = $request->input();
        $clientPublicId = isset($input['client']['public_id']) ? $input['client']['public_id'] : false;
        if ($clientPublicId == '-1') {
            $message = $message.' '.trans('texts.and_created_client');
            $trackUrl = URL::to('clients/' . $invoice->client->public_id);
            Utils::trackViewed($invoice->client->getDisplayName(), ENTITY_CLIENT, $trackUrl);
        }

        Session::flash('message', $message);

        if ($action == 'email') {
            return $this->emailInvoice($invoice, Input::get('pdfupload'));
        }

        return redirect()->to($invoice->getRoute());
    }

    /**
     * Update the specified resource in storage.
     *
     * @param  int      $id
     * @return Response
     */
    public function update(SaveInvoiceWithClientRequest $request)
    {
        $action = Input::get('action');
        $entityType = Input::get('entityType');

        $invoice = $this->invoiceService->save($request->input());
        $entityType = $invoice->getEntityType();
        $message = trans("texts.updated_{$entityType}");
        Session::flash('message', $message);

        if ($action == 'clone') {
            return $this->cloneInvoice($invoice->public_id);
        } elseif ($action == 'convert') {
            return $this->convertQuote($invoice->public_id);
        } elseif ($action == 'email') {
            return $this->emailInvoice($invoice, Input::get('pdfupload'));
        }

        return redirect()->to($invoice->getRoute());
    }


    private function emailInvoice($invoice, $pdfUpload)
    {
        $entityType = $invoice->getEntityType();
        $pdfUpload = Utils::decodePDF($pdfUpload);

        if (!Auth::user()->confirmed) {
            $errorMessage = trans(Auth::user()->registered ? 'texts.confirmation_required' : 'texts.registration_required');
            Session::flash('error', $errorMessage);
            return Redirect::to('invoices/'.$invoice->public_id.'/edit');
        }

        if ($invoice->is_recurring) {
            $response = $this->emailRecurringInvoice($invoice);
        } else {
            $response = $this->mailer->sendInvoice($invoice, false, $pdfUpload);
        }

        if ($response === true) {
            $message = trans("texts.emailed_{$entityType}");
            Session::flash('message', $message);
        } else {
            Session::flash('error', $response);
        }

        return Redirect::to("{$entityType}s/{$invoice->public_id}/edit");
    }

    private function emailRecurringInvoice(&$invoice)
    {
        if (!$invoice->shouldSendToday()) {
            if ($date = $invoice->getNextSendDate()) {
                $date = $invoice->account->formatDate($date);
                $date .= ' ' . DEFAULT_SEND_RECURRING_HOUR . ':00 am ' . $invoice->account->getTimezone();
                return trans('texts.recurring_too_soon', ['date' => $date]);
            } else {
                return trans('texts.no_longer_running');
            }
        }

        // switch from the recurring invoice to the generated invoice
        $invoice = $this->invoiceRepo->createRecurringInvoice($invoice);

        // in case auto-bill is enabled then a receipt has been sent
        if ($invoice->isPaid()) {
            return true;
        } else {
            return $this->mailer->sendInvoice($invoice);
        }
    }

    /**
     * Display the specified resource.
     *
     * @param  int      $id
     * @return Response
     */
    public function show($publicId)
    {
        Session::reflash();

        return Redirect::to("invoices/{$publicId}/edit");
    }

    /**
     * Remove the specified resource from storage.
     *
     * @param  int      $id
     * @return Response
     */
    public function bulk($entityType = ENTITY_INVOICE)
    {
        $action = Input::get('bulk_action') ?: Input::get('action');;
        $ids = Input::get('bulk_public_id') ?: (Input::get('public_id') ?: Input::get('ids'));
        $count = $this->invoiceService->bulk($ids, $action);

        if ($count > 0) {
            $key = $action == 'markSent' ? "updated_{$entityType}" : "{$action}d_{$entityType}";
            $message = Utils::pluralize($key, $count);
            Session::flash('message', $message);
        }

        if ($action == 'restore' && $count == 1) {
            return Redirect::to("{$entityType}s/".Utils::getFirst($ids));
        } else {
            return Redirect::to("{$entityType}s");
        }
    }

    public function convertQuote($publicId)
    {
        $invoice = Invoice::with('invoice_items')->scope($publicId)->firstOrFail();
        $clone = $this->invoiceService->convertQuote($invoice);

        Session::flash('message', trans('texts.converted_to_invoice'));
        return Redirect::to('invoices/'.$clone->public_id);
    }

    public function cloneInvoice($publicId)
    {
        return self::edit($publicId, true);
    }

    public function invoiceHistory($publicId)
    {
        $invoice = Invoice::withTrashed()->scope($publicId)->firstOrFail();
        $invoice->load('user', 'invoice_items', 'account.country', 'client.contacts', 'client.country');
        $invoice->invoice_date = Utils::fromSqlDate($invoice->invoice_date);
        $invoice->due_date = Utils::fromSqlDate($invoice->due_date);
        $invoice->is_pro = Auth::user()->isPro();
        $invoice->is_quote = intval($invoice->is_quote);

        $activityTypeId = $invoice->is_quote ? ACTIVITY_TYPE_UPDATE_QUOTE : ACTIVITY_TYPE_UPDATE_INVOICE;
        $activities = Activity::scope(false, $invoice->account_id)
                        ->where('activity_type_id', '=', $activityTypeId)
                        ->where('invoice_id', '=', $invoice->id)
                        ->orderBy('id', 'desc')
                        ->get(['id', 'created_at', 'user_id', 'json_backup']);

        $versionsJson = [];
        $versionsSelect = [];
        $lastId = false;

        foreach ($activities as $activity) {
            $backup = json_decode($activity->json_backup);
            $backup->invoice_date = Utils::fromSqlDate($backup->invoice_date);
            $backup->due_date = Utils::fromSqlDate($backup->due_date);
            $backup->is_pro = Auth::user()->isPro();
            $backup->is_quote = isset($backup->is_quote) && intval($backup->is_quote);
            $backup->account = $invoice->account->toArray();

            $versionsJson[$activity->id] = $backup;
            $key = Utils::timestampToDateTimeString(strtotime($activity->created_at)) . ' - ' . $activity->user->getDisplayName();
            $versionsSelect[$lastId ? $lastId : 0] = $key;
            $lastId = $activity->id;
        }

        $versionsSelect[$lastId] = Utils::timestampToDateTimeString(strtotime($invoice->created_at)) . ' - ' . $invoice->user->getDisplayName();

        $data = [
            'invoice' => $invoice,
            'versionsJson' => json_encode($versionsJson),
            'versionsSelect' => $versionsSelect,
            'invoiceDesigns' => InvoiceDesign::getDesigns(),
            'invoiceFonts' => Cache::get('fonts'),
        ];

        return View::make('invoices.history', $data);
    }
}