<?php
/**
 * Displays the import page for minilesson.
 *
 * @package mod_minilesson
 * @author  Justin Hunt - poodll.com
 */

use \mod_minilesson\constants;
use \mod_minilesson\utils;
use \mod_minilesson\local\importform\baseimportform;


require_once(__DIR__ . '/../../config.php');
require_once($CFG->libdir . '/csvlib.class.php');

$cmid = optional_param('id', 0, PARAM_INT); // course_module ID, or
$n = optional_param('n', 0, PARAM_INT);  // minilesson instance ID
$leftover_rows = optional_param('leftover_rows', '', PARAM_TEXT);
$action = optional_param('action', null, PARAM_ALPHA);
$iid = optional_param('iid', '', PARAM_INT);


if ($cmid) {
    $cm = get_coursemodule_from_id('minilesson', $cmid, 0, false, MUST_EXIST);
    $course = $DB->get_record('course', array('id' => $cm->course), '*', MUST_EXIST);
    $moduleinstance = $DB->get_record('minilesson', array('id' => $cm->instance), '*', MUST_EXIST);
} elseif ($n) {
    $moduleinstance = $DB->get_record('minilesson', array('id' => $n), '*', MUST_EXIST);
    $course = $DB->get_record('course', array('id' => $moduleinstance->course), '*', MUST_EXIST);
    $cm = get_coursemodule_from_instance('minilesson', $moduleinstance->id, $course->id, false, MUST_EXIST);
} else {
    print_error('You must specify a course_module ID or an instance ID');
}


require_login($course, true, $cm);
$modulecontext = context_module::instance($cm->id);
require_capability('mod/minilesson:manage', $modulecontext);

$pagetitle = format_string($moduleinstance->name, true, $course->id);
$pagetitle .= ': ' . get_string('import', constants::M_COMPONENT);
$baseurl = new moodle_url('/mod/minilesson/import.php', ['id' => $cmid]);
$formurl = new moodle_url($baseurl);
$term = null;

$PAGE->set_url($baseurl);
$PAGE->navbar->add($pagetitle, $PAGE->url);
$PAGE->set_heading(format_string($course->fullname, true, $course->id));
$PAGE->set_title($pagetitle);
$mode = 'import';

//Get admin settings
$config = get_config(constants::M_COMPONENT);
if ($config->enablesetuptab) {
    $PAGE->set_pagelayout('popup');
} else {
    $PAGE->set_pagelayout('incourse');
}

$renderer = $PAGE->get_renderer(constants::M_COMPONENT);
$form = new baseimportform($formurl->out(false), ['leftover_rows' => $leftover_rows]);

if ($data = $form->get_data()) {
    $errormessage = '';
    $content = $form->get_file_content('importfile');
    $theimport = new \mod_minilesson\import($moduleinstance, $modulecontext, $course, $cm);

    //temporarily raise memory limit
    raise_memory_limit(MEMORY_HUGE);

    $isjson = utils::is_json($content);
    if ($isjson) {
        if (!utils::is_json($content)) {
            $errormessage = get_string('error:invalidjson', constants::M_COMPONENT);
        } else {
            $importdata = json_decode($content);
            if (!isset($importdata->items)) {
                $errormessage = get_string('error:noitemsinjson', constants::M_COMPONENT);
            } else {
                $theimport->set_reader($importdata, $isjson);
            }
        }
    } else {
        $iid = csv_import_reader::get_new_iid('importminilessonitems');
        $cir = new csv_import_reader($iid, 'importminilessonitems');
        $readcount = $cir->load_csv_content($content, $data->encoding, $data->delimiter_name);
        $csvloaderror = $cir->get_error();
        $theimport->set_reader($cir, $isjson);

        if (!is_null($csvloaderror)) {
            $errormessage = get_string('error:csvloaderror', constants::M_COMPONENT);
            //print_error('csvloaderror', '', $baseurl, $csvloaderror);
        }
        unset($content);
    }


    echo $renderer->header($moduleinstance, $cm, $mode, null, get_string('importing', constants::M_COMPONENT));
    echo $renderer->heading($pagetitle);
    echo $renderer->box(get_string('importresults', constants::M_COMPONENT), 'generalbox minilesson_importintro', 'intro');
    if (empty($errormessage)) {
        $theimport->import_process();
    } else {
        echo $renderer->box($errormessage, 'generalbox minilesson_importintro', 'intro');
    }
    echo $renderer->back_to_import_button($cm);
    echo $renderer->footer();
    die;
}




echo $renderer->header($moduleinstance, $cm, $mode, null, get_string('import', constants::M_COMPONENT));
echo $renderer->heading($pagetitle);
//Import form and instructions
echo $renderer->heading(get_string('importheading', constants::M_COMPONENT), 4);
echo $renderer->box(
    get_string('importinstructions', constants::M_COMPONENT),
    'generalbox minilesson_importintro',
    'intro'
);
$form->display();

//Export form and instructions
echo $renderer->heading(get_string('exportheading', constants::M_COMPONENT), 4);
echo $renderer->box(
    get_string('exportinstructions', constants::M_COMPONENT),
    'generalbox minilesson_importintro',
    'intro'
);
$exporturl = moodle_url::make_pluginfile_url($modulecontext->id, constants::M_COMPONENT, 'exportjson', 0, "/", 'exportitems.json', true);
echo html_writer::link($exporturl, get_string('exportitems', constants::M_COMPONENT), ["class" => "btn btn-primary"]);
echo $renderer->footer();
