<?php


namespace App\Http\Controllers;

use App\Models\Row;
use App\Models\Table;
use App\Models\User;
use App\Tables\Changeset;
use App\Tables\Column;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Input;

class TableEditController extends Controller
{
    /**
     * Initialize the session-stored changeset, if not set yet
     *
     * @param Table $table
     * @return Changeset
     */
    private function getChangeset(Table $table)
    {
        $session_key = "proposal_{$table->id}";

        if (Input::has('reset')) {
            session()->forget($session_key);
        }

        /** @var Changeset $changeset */
        return session()->remember($session_key, function () use ($table) {
            $changeset = new Changeset();
            $changeset->table = $table;
            $changeset->revision = $table->revision;
            return $changeset;
        });
    }

    private function storeChangeset(Changeset $chs)
    {
        $session_key = "proposal_{$chs->table->id}";

        session()->put($session_key, $chs);
        session()->save();
    }

    public function draft(User $user, string $table, $tab = null)
    {
        /** @var Table $tableModel */
        $tableModel = $user->tables()->where('name', $table)->first();
        if ($tableModel === null) abort(404, "No such table.");

        if ($tab == null) $tab = 'edit-rows';
        $tabs = ['edit-rows', 'add-rows', 'manage-columns', 'review'];
        if (!in_array($tab, $tabs)) abort(404, "No such tab: $tab");

        $changeset = $this->getChangeset($tableModel);

        if (Input::has('dump')) {
            dd($changeset);
        }

        return $this->{camel_case($tab)}($changeset);
    }

    /** @noinspection PhpUnusedPrivateMethodInspection */
    private function editRows(Changeset $changeset)
    {
        $revision = $changeset->revision;
        $columns = $changeset->fetchAndTransformColumns();
        $rows = $revision->rowsData($columns, true, false)->paginate(25, []);

        return view('table.propose.edit-rows', [
            'changeset' => $changeset,
            'table' => $changeset->table,
            'columns' => collect($columns),
            'rows' => $rows,
        ]);
    }

    // TODO other tab handlers

    public function draftUpdate(User $user, string $table, Request $request)
    {
        /** @var Table $tableModel */
        $tableModel = $user->tables()->where('name', $table)->first();
        if ($tableModel === null) abort(404, "No such table.");

        $changeset = $this->getChangeset($tableModel);

        $input = objBag($request->all(), false);

        $code = 200;
        switch ($input->action) {
            case 'row.update':
                $data = (object)$input->data;
                $changeset->rowUpdate($data);

                $resp = $changeset->fetchAndTransformRow($data->_id);
                break;

            case 'row.remove':
                $changeset->rowRemove($input->id);
                $resp = $changeset->fetchAndTransformRow($input->id);
                break;

            case 'row.restore':
                $changeset->rowRestore($input->id);
                $resp = $changeset->fetchAndTransformRow($input->id);
                break;

            default:
                $resp = "Bad Action";
                $code = 400;
                break;
        }

        $this->storeChangeset($changeset);

        return $this->jsonResponse($resp, $code);
    }
}