<?php

namespace SilverStripe\CMS\Reports;

use SilverStripe\CMS\Controllers\CMSPageEditController;
use SilverStripe\CMS\Model\RedirectorPage;
use SilverStripe\CMS\Model\SiteTree;
use SilverStripe\CMS\Model\VirtualPage;
use SilverStripe\Control\Controller;
use SilverStripe\Forms\DropdownField;
use SilverStripe\Forms\FieldList;
use SilverStripe\Subsites\Model\Subsite;
use SilverStripe\ORM\ArrayList;
use SilverStripe\ORM\DataObject;
use SilverStripe\Reports\Report;
use SilverStripe\Versioned\Versioned;

/**
 * Content side-report listing pages with broken links
 */
class BrokenLinksReport extends Report
{

    public function title()
    {
        return _t(__CLASS__ . '.BROKENLINKS', 'Broken links report');
    }

    public function sourceRecords($params, $sort, $limit)
    {
        $sitetreeTbl = DataObject::singleton(SiteTree::class)->baseTable();

        $join = '';
        $sortBrokenReason = false;
        if ($sort) {
            $parts = explode(' ', $sort);
            $field = $parts[0];
            $direction = $parts[1];

            if ($field === 'AbsoluteLink') {
                $sort = 'URLSegment ' . $direction;
            } elseif ($field == 'Subsite.Title') {
                $subSiteTbl = DataObject::singleton(Subsite::class)->baseTable();
                $join = sprintf(
                    'LEFT JOIN "%s" ON "%s"."ID" = "%s"."SubsiteID"',
                    $subSiteTbl,
                    $subSiteTbl,
                    $sitetreeTbl
                );
            } elseif ($field == 'BrokenReason') {
                $sortBrokenReason = true;
                $sort = '';
            }
        }
        $brokenFilter = [
            sprintf('"%s"."HasBrokenLink" = ? OR "%s"."HasBrokenFile" = ?', $sitetreeTbl, $sitetreeTbl) => [true, true]
        ];
        $isLive = !isset($params['CheckSite']) || $params['CheckSite'] === 'Published';
        if ($isLive) {
            $ret = Versioned::get_by_stage(SiteTree::class, Versioned::LIVE, $brokenFilter, $sort, $join, $limit);
        } else {
            $ret = DataObject::get(SiteTree::class, $brokenFilter, $sort, $join, $limit);
        }

        $returnSet = ArrayList::create();
        if ($ret) {
            foreach ($ret as $record) {
                $reason = false;
                $isRedirectorPage = $record instanceof RedirectorPage;
                $isVirtualPage = $record instanceof VirtualPage;
                $reasonCodes = [];
                if ($isVirtualPage) {
                    if ($record->HasBrokenLink) {
                        $reason = _t(__CLASS__ . '.VirtualPageNonExistent', 'virtual page pointing to non-existent page');
                        $reasonCodes = ['VPBROKENLINK'];
                    }
                } elseif ($isRedirectorPage) {
                    if ($record->HasBrokenLink) {
                        $reason = _t(__CLASS__ . '.RedirectorNonExistent', 'redirector page pointing to non-existent page');
                        $reasonCodes = ['RPBROKENLINK'];
                    }
                } else {
                    if ($record->HasBrokenLink && $record->HasBrokenFile) {
                        $reason = _t(__CLASS__ . '.HasBrokenLinkAndFile', 'has broken link and file');
                        $reasonCodes = ['BROKENFILE', 'BROKENLINK'];
                    } elseif ($record->HasBrokenLink && !$record->HasBrokenFile) {
                        $reason = _t(__CLASS__ . '.HasBrokenLink', 'has broken link');
                        $reasonCodes = ['BROKENLINK'];
                    } elseif (!$record->HasBrokenLink && $record->HasBrokenFile) {
                        $reason = _t(__CLASS__ . '.HasBrokenFile', 'has broken file');
                        $reasonCodes = ['BROKENFILE'];
                    }
                }

                if ($reason) {
                    if (isset($params['Reason']) && $params['Reason'] && !in_array($params['Reason'], $reasonCodes)) {
                        continue;
                    }
                    $record->BrokenReason = $reason;
                    $returnSet->push($record);
                }
            }
        }

        if ($sortBrokenReason) {
            $returnSet = $returnSet->sort('BrokenReason', $direction);
        }

        return $returnSet;
    }
    public function columns()
    {
        if (isset($_REQUEST['filters']['CheckSite']) && $_REQUEST['filters']['CheckSite'] == 'Draft') {
            $dateTitle = _t(__CLASS__ . '.ColumnDateLastModified', 'Date last modified');
        } else {
            $dateTitle = _t(__CLASS__ . '.ColumnDateLastPublished', 'Date last published');
        }

        $linkBase = CMSPageEditController::singleton()->Link('show');
        $fields = [
            'Title' => [
                'title' => _t(__CLASS__ . '.PageName', 'Page name'),
                'formatting' => function ($value, $item) use ($linkBase) {
                    return sprintf(
                        '<a href="%s" title="%s">%s</a>',
                        Controller::join_links($linkBase, $item->ID),
                        _t(__CLASS__ . '.HoverTitleEditPage', 'Edit page'),
                        $value
                    );
                }
            ],
            'LastEdited' => [
                'title' => $dateTitle,
                'casting' => 'DBDatetime->Full'
            ],
            'BrokenReason' => [
                'title' => _t(__CLASS__ . '.ColumnProblemType', 'Problem type')
            ],
            'AbsoluteLink' => [
                'title' => _t(__CLASS__ . '.ColumnURL', 'URL'),
                'formatting' => function ($value, $item) {
                    /** @var SiteTree $item */
                    $liveLink = $item->AbsoluteLiveLink;
                    $stageLink = $item->AbsoluteLink();
                    return sprintf(
                        '%s <a href="%s">%s</a>',
                        $stageLink,
                        $liveLink ? $liveLink : Controller::join_links($stageLink, '?stage=Stage'),
                        $liveLink ? '(live)' : '(draft)'
                    );
                }
            ],
        ];

        return $fields;
    }
    public function parameterFields()
    {
        return FieldList::create(
            DropdownField::create('CheckSite', _t(__CLASS__ . '.CheckSite', 'Check site'), [
                'Published' => _t(__CLASS__ . '.CheckSiteDropdownPublished', 'Published Site'),
                'Draft' => _t(__CLASS__ . '.CheckSiteDropdownDraft', 'Draft Site')
            ]),
            DropdownField::create(
                'Reason',
                _t(__CLASS__ . '.ReasonDropdown', 'Problem to check'),
                [
                    '' => _t(__CLASS__ . '.Any', 'Any'),
                    'BROKENFILE' => _t(__CLASS__ . '.ReasonDropdownBROKENFILE', 'Broken file'),
                    'BROKENLINK' => _t(__CLASS__ . '.ReasonDropdownBROKENLINK', 'Broken link'),
                    'VPBROKENLINK' => _t(__CLASS__ . '.ReasonDropdownVPBROKENLINK', 'Virtual page pointing to non-existent page'),
                    'RPBROKENLINK' => _t(__CLASS__ . '.ReasonDropdownRPBROKENLINK', 'Redirector page pointing to non-existent page'),
                ]
            )
        );
    }
}