<?php
namespace Misuzu;

use stdClass;
use InvalidArgumentException;
use RuntimeException;
use Index\ByteFormat;
use Index\DateTime;
use Misuzu\Parsers\Parser;
use Misuzu\Users\User;
use Misuzu\Users\Assets\UserAvatarAsset;
use Misuzu\Users\Assets\UserBackgroundAsset;

$userId = !empty($_GET['u']) && is_string($_GET['u']) ? trim($_GET['u']) : 0;
$profileMode = !empty($_GET['m']) && is_string($_GET['m']) ? (string)$_GET['m'] : '';
$isEditing = !empty($_GET['edit']) && is_string($_GET['edit']) ? (bool)$_GET['edit'] : !empty($_POST) && is_array($_POST);

$urls = $msz->getURLs();
$usersCtx = $msz->getUsersContext();
$users = $usersCtx->getUsers();
$forumCtx = $msz->getForumContext();
$forumCategories = $forumCtx->getCategories();
$forumTopics = $forumCtx->getTopics();
$forumPosts = $forumCtx->getPosts();

$authInfo = $msz->getAuthInfo();
$viewerInfo = $authInfo->getUserInfo();
$viewingAsGuest = $viewerInfo === null;
$viewerId = $viewingAsGuest ? '0' : $viewerInfo->getId();

try {
    $userInfo = $usersCtx->getUserInfo($userId, 'profile');
} catch(RuntimeException $ex) {
    http_response_code(404);
    Template::render('profile.index', [
        'profile_is_guest' => $viewingAsGuest,
        'profile_is_deleted' => true,
        'profile_is_banned' => false,
    ]);
    return;
}

if($userInfo->isDeleted()) {
    http_response_code(404);
    Template::render('profile.index', [
        'profile_is_guest' => $viewingAsGuest,
        'profile_is_deleted' => true,
        'profile_is_banned' => false,
    ]);
    return;
}

switch($profileMode) {
    default:
        Template::throwError(404);

    case 'forum-topics':
        Tools::redirect($urls->format('search-query', ['query' => sprintf('type:forum:topic author:%s', $userInfo->getName()), 'section' => 'topics']));
        return;

    case 'forum-posts':
        Tools::redirect($urls->format('search-query', ['query' => sprintf('type:forum:post author:%s', $userInfo->getName()), 'section' => 'posts']));
        return;

    case '':
        break;
}

$notices = [];

$userRank = $usersCtx->getUserRank($userInfo);
$viewerRank = $usersCtx->getUserRank($viewerInfo);

$viewerPermsGlobal = $authInfo->getPerms('global');
$viewerPermsUser = $authInfo->getPerms('user');

$activeBanInfo = $usersCtx->tryGetActiveBan($userInfo);
$isBanned = $activeBanInfo !== null;
$profileFields = $msz->getProfileFields();
$viewingOwnProfile = (string)$viewerId === $userInfo->getId();
$canManageWarnings = $viewerPermsUser->check(Perm::U_WARNINGS_MANAGE);
$canEdit = !$viewingAsGuest && ((!$isBanned && $viewingOwnProfile) || $viewerInfo->isSuperUser() || (
    $viewerPermsUser->check(Perm::U_USERS_MANAGE) && ($viewingOwnProfile || $viewerRank > $userRank)
));
$avatarInfo = new UserAvatarAsset($userInfo);
$backgroundInfo = new UserBackgroundAsset($userInfo);

if($isEditing) {
    if(!$canEdit)
        Template::throwError(403);

    $perms = $viewerPermsUser->checkMany([
        'edit_profile' => Perm::U_PROFILE_EDIT,
        'edit_avatar' => Perm::U_AVATAR_CHANGE,
        'edit_background' => PERM::U_PROFILE_BACKGROUND_CHANGE,
        'edit_about' => Perm::U_PROFILE_ABOUT_EDIT,
        'edit_birthdate' => Perm::U_PROFILE_BIRTHDATE_EDIT,
        'edit_signature' => Perm::U_FORUM_SIGNATURE_EDIT,
    ]);

    Template::set([
        'perms' => $perms,
        'background_attachments' => UserBackgroundAsset::getAttachmentStringOptions(),
    ]);

    if(!empty($_POST) && is_array($_POST)) {
        if(!CSRF::validateRequest()) {
            $notices[] = 'Couldn\'t verify you, please refresh the page and retry.';
        } else {
            $profileFieldsSubmit = filter_input(INPUT_POST, 'profile', FILTER_DEFAULT, FILTER_REQUIRE_ARRAY);

            if(!empty($profileFieldsSubmit)) {
                if(!$perms->edit_profile) {
                    $notices[] = 'You\'re not allowed to edit your profile';
                } else {
                    $profileFieldInfos = iterator_to_array($profileFields->getFields());
                    $profileFieldsSetInfos = [];
                    $profileFieldsSetValues = [];
                    $profileFieldsRemove = [];

                    foreach($profileFieldInfos as $fieldInfo) {
                        $fieldName = $fieldInfo->getName();
                        $fieldValue = empty($profileFieldsSubmit[$fieldName]) ? '' : (string)filter_var($profileFieldsSubmit[$fieldName]);

                        if(empty($profileFieldsSubmit[$fieldName])) {
                            $profileFieldsRemove[] = $fieldInfo;
                            continue;
                        }

                        if($fieldInfo->checkValue($fieldValue)) {
                            $profileFieldsSetInfos[] = $fieldInfo;
                            $profileFieldsSetValues[] = $fieldValue;
                        } else
                            $notices[] = sprintf('%s isn\'t properly formatted.', $fieldInfo->getTitle());

                        unset($fieldName, $fieldValue, $fieldInfo);
                    }

                    if(!empty($profileFieldsRemove))
                        $profileFields->removeFieldValues($userInfo, $profileFieldsRemove);
                    if(!empty($profileFieldsSetInfos))
                        $profileFields->setFieldValues($userInfo, $profileFieldsSetInfos, $profileFieldsSetValues);
                }
            }

            if(!empty($_POST['about']) && is_array($_POST['about'])) {
                if(!$perms->edit_about) {
                    $notices[] = 'You\'re not allowed to edit your about page.';
                } else {
                    $aboutText  = (string)($_POST['about']['text'] ?? '');
                    $aboutParse = (int)($_POST['about']['parser'] ?? Parser::PLAIN);
                    $aboutValid = $users->validateProfileAbout($aboutParse, $aboutText);

                    if($aboutValid === '')
                        $users->updateUser($userInfo, aboutContent: $aboutText, aboutParser: $aboutParse);
                    else
                        $notices[] = $users->validateProfileAboutText($aboutValid);
                }
            }

            if(!empty($_POST['signature']) && is_array($_POST['signature'])) {
                if(!$perms->edit_signature) {
                    $notices[] = 'You\'re not allowed to edit your forum signature.';
                } else {
                    $sigText  = (string)($_POST['signature']['text'] ?? '');
                    $sigParse = (int)($_POST['signature']['parser'] ?? Parser::PLAIN);
                    $sigValid = $users->validateForumSignature($sigParse, $sigText);

                    if($sigValid === '')
                        $users->updateUser($userInfo, signatureContent: $sigText, signatureParser: $sigParse);
                    else
                        $notices[] = $users->validateForumSignatureText($sigValid);
                }
            }

            if(!empty($_POST['birthdate']) && is_array($_POST['birthdate'])) {
                if(!$perms->edit_birthdate) {
                    $notices[] = "You aren't allow to change your birthdate.";
                } else {
                    $birthYear  = (int)($_POST['birthdate']['year'] ?? 0);
                    $birthMonth = (int)($_POST['birthdate']['month'] ?? 0);
                    $birthDay   = (int)($_POST['birthdate']['day'] ?? 0);
                    $birthValid = $users->validateBirthdate($birthYear, $birthMonth, $birthDay);

                    if($birthValid === '')
                        $users->updateUser($userInfo, birthYear: $birthYear, birthMonth: $birthMonth, birthDay: $birthDay);
                    else
                        $notices[] = $users->validateBirthdateText($birthValid);
                }
            }

            if(!empty($_FILES['avatar'])) {
                if(!empty($_POST['avatar']['delete'])) {
                    $avatarInfo->delete();
                } else {
                    if(!$perms->edit_avatar) {
                        $notices[] = 'You aren\'t allow to change your avatar.';
                    } elseif(!empty($_FILES['avatar'])
                        && is_array($_FILES['avatar'])
                        && !empty($_FILES['avatar']['name']['file'])) {
                        if($_FILES['avatar']['error']['file'] !== UPLOAD_ERR_OK) {
                            switch($_FILES['avatar']['error']['file']) {
                                case UPLOAD_ERR_NO_FILE:
                                    $notices[] = 'Select a file before hitting upload!';
                                    break;
                                case UPLOAD_ERR_PARTIAL:
                                    $notices[] = 'The upload was interrupted, please try again!';
                                    break;
                                case UPLOAD_ERR_INI_SIZE:
                                case UPLOAD_ERR_FORM_SIZE:
                                    $notices[] = sprintf('Your avatar is not allowed to be larger in file size than %s!', ByteFormat::format($avatarInfo->getMaxBytes()));
                                    break;
                                default:
                                    $notices[] = 'Unable to save your avatar, contact an administator!';
                                    break;
                            }
                        } else {
                            try {
                                $avatarInfo->setFromPath($_FILES['avatar']['tmp_name']['file']);
                            } catch(InvalidArgumentException $ex) {
                                $exMessage = $ex->getMessage();
                                $notices[] = match($exMessage) {
                                    '$path is not a valid image.' => 'The file you uploaded was not an image!',
                                    '$path is not an allowed image file.' => 'This type of image is not supported, keep to PNG, JPG or GIF!',
                                    'Dimensions of $path are too large.' => sprintf('Your avatar can\'t be larger than %dx%d!', $avatarInfo->getMaxWidth(), $avatarInfo->getMaxHeight()),
                                    'File size of $path is too large.' => sprintf('Your avatar is not allowed to be larger in file size than %s!', ByteFormat::format($avatarInfo->getMaxBytes())),
                                    default => $exMessage,
                                };
                            } catch(RuntimeException $ex) {
                                $notices[] = 'Unable to save your avatar, contact an administator!';
                            }
                        }
                    }
                }
            }

            if(!empty($_FILES['background'])) {
                if((int)($_POST['background']['attach'] ?? -1) === 0) {
                    $backgroundInfo->delete();
                } else {
                    if(!$perms->edit_background) {
                        $notices[] = 'You aren\'t allow to change your background.';
                    } elseif(!empty($_FILES['background']) && is_array($_FILES['background'])) {
                        if(!empty($_FILES['background']['name']['file'])) {
                            if($_FILES['background']['error']['file'] !== UPLOAD_ERR_OK) {
                                switch($_FILES['background']['error']['file']) {
                                    case UPLOAD_ERR_NO_FILE:
                                        $notices[] = 'Select a file before hitting upload!';
                                        break;
                                    case UPLOAD_ERR_PARTIAL:
                                        $notices[] = 'The upload was interrupted, please try again!';
                                        break;
                                    case UPLOAD_ERR_INI_SIZE:
                                    case UPLOAD_ERR_FORM_SIZE:
                                        $notices[] = sprintf('Your background is not allowed to be larger in file size than %s!', ByteFormat::format($backgroundProps['max_size']));
                                        break;
                                    default:
                                        $notices[] = 'Unable to save your background, contact an administator!';
                                        break;
                                }
                            } else {
                                try {
                                    $backgroundInfo->setFromPath($_FILES['background']['tmp_name']['file']);
                                } catch(InvalidArgumentException $ex) {
                                    $exMessage = $ex->getMessage();
                                    $notices[] = match($exMessage) {
                                        '$path is not a valid image.' => 'The file you uploaded was not an image!',
                                        '$path is not an allowed image file.' => 'This type of image is not supported, keep to PNG, JPG or GIF!',
                                        'Dimensions of $path are too large.' => sprintf('Your background can\'t be larger than %dx%d!', $backgroundInfo->getMaxWidth(), $backgroundInfo->getMaxHeight()),
                                        'File size of $path is too large.' => sprintf('Your background is not allowed to be larger in file size than %2$s!', ByteFormat::format($backgroundInfo->getMaxBytes())),
                                        default => $exMessage,
                                    };
                                } catch(RuntimeException $ex) {
                                    $notices[] = 'Unable to save your background, contact an administator!';
                                }
                            }
                        }

                        $backgroundInfo->setAttachment((int)($_POST['background']['attach'] ?? 0))
                            ->setBlend(!empty($_POST['background']['attr']['blend']))
                            ->setSlide(!empty($_POST['background']['attr']['slide']));
                    }
                }

                $users->updateUser($userInfo, backgroundSettings: $backgroundInfo->getSettings());
            }
        }

        // Unset $isEditing and hope the user doesn't refresh their profile!
        if(empty($notices))
            $isEditing = false;
    }
}

// TODO: create user counters so these can be statically kept
$profileStats = new stdClass;
$profileStats->forum_topic_count = $forumCtx->countTotalUserTopics($userInfo);
$profileStats->forum_post_count = $forumCtx->countTotalUserPosts($userInfo);
$profileStats->comments_count = $msz->getComments()->countPosts(userInfo: $userInfo, deleted: false);

if(!$viewingAsGuest) {
    Template::set('profile_warnings', iterator_to_array($usersCtx->getWarnings()->getWarningsWithDefaultBacklog($userInfo)));

    if((!$isBanned || $canEdit)) {
        $unranked = $cfg->getValues([
            'forum_leader.unranked.forum:a',
            'forum_leader.unranked.topic:a',
        ]);

        $activeCategoryStats = $forumCategories->getMostActiveCategoryInfo(
            $userInfo,
            $unranked['forum_leader.unranked.forum'],
            $unranked['forum_leader.unranked.topic'],
            deleted: false
        );
        $activeCategoryInfo = $activeCategoryStats->success ? $forumCategories->getCategory(categoryId: $activeCategoryStats->categoryId) : null;

        $activeTopicStats = $forumTopics->getMostActiveTopicInfo(
            $userInfo,
            $unranked['forum_leader.unranked.forum'],
            $unranked['forum_leader.unranked.topic'],
            deleted: false
        );
        $activeTopicInfo = $activeTopicStats->success ? $forumTopics->getTopic(topicId: $activeTopicStats->topicId) : null;

        $profileFieldValues = iterator_to_array($profileFields->getFieldValues($userInfo));
        $profileFieldInfos = $profileFieldInfos ?? iterator_to_array($profileFields->getFields(fieldValueInfos: $isEditing ? null : $profileFieldValues));
        $profileFieldFormats = iterator_to_array($profileFields->getFieldFormats(fieldValueInfos: $profileFieldValues));

        $profileFieldRawValues = [];
        $profileFieldLinkValues = [];
        $profileFieldDisplayValues = [];

        // using field infos as the basis for now, uses the correct ordering
        foreach($profileFieldInfos as $fieldInfo) {
            unset($fieldValue);

            foreach($profileFieldValues as $fieldValueTest)
                if($fieldValueTest->getFieldId() === $fieldInfo->getId()) {
                    $fieldValue = $fieldValueTest;
                    break;
                }

            $fieldName = $fieldInfo->getName();

            if(isset($fieldValue)) {
                foreach($profileFieldFormats as $fieldFormatTest)
                    if($fieldFormatTest->getId() === $fieldValue->getFormatId()) {
                        $fieldFormat = $fieldFormatTest;
                        break;
                    }

                $profileFieldRawValues[$fieldName] = $fieldValue->getValue();
                $profileFieldDisplayValues[$fieldName] = $fieldFormat->formatDisplay($fieldValue->getValue());
                if($fieldFormat->hasLinkFormat())
                    $profileFieldLinkValues[$fieldName] = $fieldFormat->formatLink($fieldValue->getValue());
            }
        }

        Template::set([
            'profile_active_category_stats' => $activeCategoryStats,
            'profile_active_category_info' => $activeCategoryInfo,
            'profile_active_topic_stats' => $activeTopicStats,
            'profile_active_topic_info' => $activeTopicInfo,
            'profile_fields_infos' => $profileFieldInfos,
            'profile_fields_raw_values' => $profileFieldRawValues,
            'profile_fields_display_values' => $profileFieldDisplayValues,
            'profile_fields_link_values' => $profileFieldLinkValues,
        ]);
    }
}

Template::render('profile.index', [
    'profile_viewer' => $viewerInfo,
    'profile_user' => $userInfo,
    'profile_colour' => $usersCtx->getUserColour($userInfo),
    'profile_stats' => $profileStats,
    'profile_mode' => $profileMode,
    'profile_notices' => $notices,
    'profile_can_edit' => $canEdit,
    'profile_is_editing' => $isEditing,
    'profile_is_banned' => $isBanned,
    'profile_is_guest' => $viewingAsGuest,
    'profile_is_deleted' => false,
    'profile_ban_info' => $activeBanInfo,
    'profile_avatar_info' => $avatarInfo,
    'profile_background_info' => $backgroundInfo,
    'profile_can_send_messages' => $viewerPermsGlobal->check(Perm::G_MESSAGES_SEND),
]);