<?php
/**
 * @package AKSRT
 */

namespace AKSRT\Admin;

defined('ABSPATH') || exit;

trait UserControllerReportOperations {

    public function get_report_list(\WP_REST_Request $request): \WP_REST_Response {
        if (!class_exists('\AKSRT\Messages\ReportCenter')) {
            return $this->success([
                'data' => [
                    'items'   => [],
                    'reports' => [],
                    'counts'  => ['pending' => 0, 'reviewing' => 0, 'resolved' => 0, 'dismissed' => 0, 'total' => 0],
                    'total'   => 0,
                    'page'    => 1,
                    'options' => [
                        'statuses' => $this->get_report_status_options(),
                    ],
                ],
            ]);
        }

        global $wpdb;

        $table = \AKSRT\Core\DBMigrator::table('report');
        if (!$table) {
            return $this->success([
                'data' => [
                    'items'   => [],
                    'reports' => [],
                    'counts'  => ['pending' => 0, 'reviewing' => 0, 'resolved' => 0, 'dismissed' => 0, 'total' => 0],
                    'total'   => 0,
                    'page'    => 1,
                    'options' => [
                        'statuses' => $this->get_report_status_options(),
                    ],
                ],
            ]);
        }

        $page        = max(1, (int) ($request->get_param('page') ?: 1));
        $per_page    = max(1, min(100, (int) ($request->get_param('per_page') ?: $request->get_param('limit') ?: 20)));
        $status      = sanitize_key((string) $request->get_param('status'));
        $category    = sanitize_key((string) $request->get_param('category'));
        $target_type = sanitize_key((string) $request->get_param('target_type'));
        $keyword     = trim(sanitize_text_field((string) $request->get_param('keyword')));
        $date_from   = sanitize_text_field((string) $request->get_param('date_from'));
        $date_to     = sanitize_text_field((string) $request->get_param('date_to'));

        $where  = [];
        $params = [];

        if ($status !== '') {
            $where[]  = 'status = %s';
            $params[] = $status;
        }
        if ($category !== '') {
            $where[]  = 'category = %s';
            $params[] = $category;
        }
        if ($target_type !== '') {
            $where[]  = 'target_type = %s';
            $params[] = $target_type;
        }
        if ($date_from !== '') {
            $where[]  = 'created_at >= %s';
            $params[] = $date_from . ' 00:00:00';
        }
        if ($date_to !== '') {
            $where[]  = 'created_at <= %s';
            $params[] = $date_to . ' 23:59:59';
        }

        $where_sql = $where ? 'WHERE ' . implode(' AND ', $where) : '';
        $sql       = "SELECT * FROM {$table} {$where_sql} ORDER BY created_at DESC LIMIT 500";
        $rows      = $params ? $wpdb->get_results($wpdb->prepare($sql, $params), ARRAY_A) : $wpdb->get_results($sql, ARRAY_A);

        $items = [];
        foreach ((array) $rows as $row) {
            $item = $this->build_report_admin_item($row);
            if ($keyword !== '' && !$this->report_matches_keyword($item, $keyword)) {
                continue;
            }
            $items[] = $item;
        }

        $total      = count($items);
        $offset     = ($page - 1) * $per_page;
        $paged      = array_slice($items, $offset, $per_page);
        $counts     = \AKSRT\Messages\ReportCenter::get_instance()->get_status_counts();
        $categories = [];
        foreach ((array) $rows as $row) {
            $cat = sanitize_key((string) ($row['category'] ?? ''));
            if ($cat !== '') {
                $categories[$cat] = $cat;
            }
        }

        return $this->success([
            'data' => [
                'items'    => array_values($paged),
                'reports'  => array_values($paged),
                'total'    => $total,
                'page'     => $page,
                'per_page' => $per_page,
                'counts'   => $counts,
                'options'  => [
                    'statuses'   => $this->get_report_status_options(),
                    'actions'    => $this->get_report_action_options(),
                    'targets'    => $this->get_report_target_type_options(),
                    'categories' => array_map(static function ($item) {
                        return ['label' => $item, 'value' => $item];
                    }, array_values($categories)),
                ],
            ],
        ]);
    }

    public function get_report_detail(\WP_REST_Request $request): \WP_REST_Response {
        global $wpdb;

        $report_id = (int) $request->get_param('id');
        $table     = \AKSRT\Core\DBMigrator::table('report');

        if ($report_id <= 0 || !$table) {
            return $this->error(__('举报工单不存在', 'aksrt'), 404);
        }

        $row = $wpdb->get_row($wpdb->prepare("SELECT * FROM {$table} WHERE id = %d", $report_id), ARRAY_A);
        if (!$row) {
            return $this->error(__('举报工单不存在', 'aksrt'), 404);
        }

        $related = (int) $wpdb->get_var($wpdb->prepare(
            "SELECT COUNT(*) FROM {$table} WHERE target_type = %s AND target_id = %d",
            sanitize_key((string) $row['target_type']),
            (int) $row['target_id']
        ));

        return $this->success([
            'data' => [
                'report'  => $this->build_report_admin_item($row),
                'related' => ['same_target_count' => $related],
                'options' => [
                    'statuses' => $this->get_report_status_options(),
                    'actions'  => $this->get_report_action_options(sanitize_key((string) $row['target_type'])),
                ],
            ],
        ]);
    }

    public function process_report(\WP_REST_Request $request): \WP_REST_Response {
        $report_id = (int) $request->get_param('id');
        if ($report_id <= 0) {
            return $this->error(__('参数无效', 'aksrt'));
        }

        return $this->handle_report_process($report_id, $this->get_json_params($request));
    }

    private function handle_report_process(int $report_id, array $payload): \WP_REST_Response {
        global $wpdb;

        $table = \AKSRT\Core\DBMigrator::table('report');
        if (!$table) {
            return $this->error(__('举报系统未启用', 'aksrt'));
        }

        $status       = sanitize_key((string) ($payload['status'] ?? ''));
        $action_taken = sanitize_key((string) ($payload['action_taken'] ?? 'none'));
        $note         = sanitize_textarea_field((string) ($payload['note'] ?? ''));

        $valid_statuses = array_column($this->get_report_status_options(), 'value');
        $valid_actions  = array_column($this->get_report_action_options(), 'value');

        if ($status === '' || !in_array($status, $valid_statuses, true)) {
            return $this->error(__('处理状态无效', 'aksrt'));
        }
        if (!in_array($action_taken, $valid_actions, true)) {
            $action_taken = 'none';
        }

        $row = $wpdb->get_row($wpdb->prepare("SELECT * FROM {$table} WHERE id = %d", $report_id), ARRAY_A);
        if (!$row) {
            return $this->error(__('举报工单不存在', 'aksrt'), 404);
        }

        $effect = $this->apply_report_action(
            sanitize_key((string) $row['target_type']),
            (int) $row['target_id'],
            $action_taken,
            (string) ($row['reason'] ?? '')
        );

        $notes = json_decode((string) ($row['notes_json'] ?? '[]'), true);
        if (!is_array($notes)) {
            $notes = [];
        }
        $notes[] = [
            'note'         => $note,
            'status'       => $status,
            'action_taken' => $action_taken,
            'operator'     => get_current_user_id(),
            'timestamp'    => current_time('mysql'),
            'effect'       => $effect,
        ];

        $updated = $wpdb->update(
            $table,
            [
                'status'     => $status,
                'updated_at' => current_time('mysql'),
                'notes_json' => wp_json_encode($notes),
            ],
            ['id' => $report_id],
            ['%s', '%s', '%s'],
            ['%d']
        );

        if ($updated === false) {
            return $this->error(__('处理失败', 'aksrt'));
        }

        return $this->success([
            'message' => __('举报工单已处理', 'aksrt'),
        ]);
    }

    private function build_report_admin_item(array $row): array {
        $reporter = get_userdata((int) ($row['reporter_id'] ?? 0));
        $notes    = json_decode((string) ($row['notes_json'] ?? '[]'), true);
        if (!is_array($notes)) {
            $notes = [];
        }

        $normalized_notes = [];
        foreach ($notes as $entry) {
            $operator_id   = (int) ($entry['operator'] ?? 0);
            $operator_user = $operator_id > 0 ? get_userdata($operator_id) : null;
            $normalized_notes[] = [
                'note'          => (string) ($entry['note'] ?? ''),
                'status'        => sanitize_key((string) ($entry['status'] ?? '')),
                'action_taken'  => sanitize_key((string) ($entry['action_taken'] ?? 'none')),
                'operator'      => $operator_id,
                'operator_name' => $operator_user ? $operator_user->display_name : '',
                'timestamp'     => (string) ($entry['timestamp'] ?? ''),
                'effect'        => (string) ($entry['effect'] ?? ''),
            ];
        }

        $last_note = !empty($normalized_notes) ? $normalized_notes[count($normalized_notes) - 1] : null;

        return [
            'id'          => (int) ($row['id'] ?? 0),
            'target_type' => sanitize_key((string) ($row['target_type'] ?? '')),
            'target_id'   => (int) ($row['target_id'] ?? 0),
            'reason'      => (string) ($row['reason'] ?? ''),
            'category'    => sanitize_key((string) ($row['category'] ?? '')),
            'status'      => sanitize_key((string) ($row['status'] ?? 'pending')),
            'created_at'  => (string) ($row['created_at'] ?? ''),
            'updated_at'  => (string) ($row['updated_at'] ?? ''),
            'reporter'    => $this->build_admin_user_summary($reporter ? (int) $reporter->ID : 0, $reporter),
            'target'      => $this->build_report_target_summary(
                sanitize_key((string) ($row['target_type'] ?? '')),
                (int) ($row['target_id'] ?? 0)
            ),
            'notes'       => $normalized_notes,
            'note_count'  => count($normalized_notes),
            'last_note'   => $last_note,
        ];
    }

    private function report_matches_keyword(array $item, string $keyword): bool {
        $haystack = implode(' ', array_filter([
            (string) ($item['reason'] ?? ''),
            (string) ($item['category'] ?? ''),
            (string) ($item['reporter']['display_name'] ?? ''),
            (string) ($item['reporter']['email'] ?? ''),
            (string) ($item['target']['title'] ?? ''),
            (string) ($item['target']['display_name'] ?? ''),
            (string) ($item['target']['excerpt'] ?? ''),
            (string) ($item['target_id'] ?? ''),
        ]));

        return mb_stripos($haystack, $keyword) !== false;
    }

    private function build_report_target_summary(string $target_type, int $target_id): array {
        $summary = [
            'type'         => $target_type,
            'id'           => $target_id,
            'title'        => '',
            'excerpt'      => '',
            'display_name' => '',
            'status'       => '',
            'url'          => '',
            'ban_state'    => '',
        ];

        if ($target_type === 'post') {
            $post = get_post($target_id);
            if ($post instanceof \WP_Post) {
                $summary['title']  = get_the_title($post);
                $summary['status'] = (string) $post->post_status;
                $summary['url']    = get_permalink($post);
            }
        } elseif ($target_type === 'comment') {
            $comment = get_comment($target_id);
            if ($comment instanceof \WP_Comment) {
                $summary['display_name'] = (string) $comment->comment_author;
                $summary['excerpt']      = wp_trim_words(wp_strip_all_tags((string) $comment->comment_content), 24);
                $summary['status']       = $comment->comment_approved === '1' ? 'approved' : (string) $comment->comment_approved;
                $summary['url']          = get_comment_link($comment);
                if (!empty($comment->comment_post_ID)) {
                    $summary['title'] = get_the_title((int) $comment->comment_post_ID);
                }
            }
        } elseif ($target_type === 'user') {
            $user = get_userdata($target_id);
            if ($user instanceof \WP_User) {
                $summary['display_name'] = $user->display_name;
                $summary['title']        = $user->display_name;
                $summary['url']          = function_exists('aksrt_get_user_home_url') ? aksrt_get_user_home_url($target_id) : '';
                $summary['ban_state']    = $this->get_user_restriction_state($target_id);
            }
        }

        return $summary;
    }

    /**
     * 用户当前限制状态摘要（banned|restricted|muted|空），与 Restriction 表实时同步。
     */
    private function get_user_restriction_state(int $user_id): string {
        if ($user_id <= 0 || !class_exists('\AKSRT\User\Restriction')) {
            return '';
        }
        $svc = \AKSRT\User\Restriction::get_instance();
        if ($svc->is_banned($user_id)) {
            return 'banned';
        }
        if ($svc->is_restricted($user_id, \AKSRT\User\Restriction::TYPE_SUSPEND)) {
            return 'restricted';
        }
        if ($svc->is_restricted($user_id, \AKSRT\User\Restriction::TYPE_MUTE)) {
            return 'muted';
        }
        return '';
    }

    private function apply_report_action(string $target_type, int $target_id, string $action_taken, string $reason = ''): string {
        if (!class_exists('\AKSRT\Messages\ReportCenter')) {
            return '';
        }
        return \AKSRT\Messages\ReportCenter::get_instance()->apply_action($target_type, $target_id, $action_taken, $reason);
    }

    private function get_report_status_options(): array {
        return [
            ['label' => __('待处理', 'aksrt'), 'value' => 'pending'],
            ['label' => __('处理中', 'aksrt'), 'value' => 'reviewing'],
            ['label' => __('已解决', 'aksrt'), 'value' => 'resolved'],
            ['label' => __('已驳回', 'aksrt'), 'value' => 'dismissed'],
        ];
    }

    private function get_report_target_type_options(): array {
        return [
            ['label' => __('文章', 'aksrt'), 'value' => 'post'],
            ['label' => __('评论', 'aksrt'), 'value' => 'comment'],
            ['label' => __('用户', 'aksrt'), 'value' => 'user'],
        ];
    }

    private function get_report_action_options(string $target_type = ''): array {
        $common = [
            ['label' => __('仅更新状态', 'aksrt'), 'value' => 'none'],
            ['label' => __('升级人工处理', 'aksrt'), 'value' => 'escalated'],
        ];

        if ($target_type === 'user' || $target_type === '') {
            $common = array_merge($common, [
                ['label' => __('发送警告', 'aksrt'), 'value' => 'warn'],
                ['label' => __('禁言', 'aksrt'), 'value' => 'mute'],
                ['label' => __('停权', 'aksrt'), 'value' => 'suspend'],
                ['label' => __('封禁账号', 'aksrt'), 'value' => 'ban'],
                ['label' => __('解除限制', 'aksrt'), 'value' => 'clear'],
            ]);
        }

        if ($target_type === 'post' || $target_type === 'comment' || $target_type === '') {
            $common[] = ['label' => __('转为待审内容', 'aksrt'), 'value' => 'content_removed'];
        }

        return $common;
    }

    /**
     * POST /report/submit — 前台举报提交（登录用户）
     */
    public function submit_report(\WP_REST_Request $request): \WP_REST_Response {
        if (!class_exists('\AKSRT\Messages\ReportCenter')) {
            return $this->error('举报系统未启用', 500);
        }

        $params = $this->get_json_params($request);
        $target_type = sanitize_key((string) ($params['target_type'] ?? ''));
        $target_id   = (int) ($params['target_id'] ?? 0);
        $reason      = sanitize_textarea_field((string) ($params['reason'] ?? ''));
        $category    = sanitize_key((string) ($params['category'] ?? ''));

        if ($target_type === '' || $target_id <= 0 || $reason === '') {
            return $this->error('请填写完整的举报信息');
        }

        $valid_types = ['post', 'comment', 'user'];
        if (!in_array($target_type, $valid_types, true)) {
            return $this->error('无效的举报类型');
        }

        $reporter_id = get_current_user_id();
        if ($reporter_id <= 0) {
            return $this->error(__('请先登录', 'aksrt'), 401);
        }

        // 同一人对同一目标的待处理工单只允许存在一条
        if (\AKSRT\Messages\ReportCenter::get_instance()->has_pending_report($reporter_id, $target_type, $target_id)) {
            return $this->error(__('你已提交过相同的举报，请等待处理结果', 'aksrt'), 409);
        }
        if ($target_type === 'user') {
            if ($target_id === $reporter_id) {
                return $this->error(__('不能举报自己', 'aksrt'), 400);
            }
            if (!function_exists('aksrt_user_can') || !aksrt_user_can('user_report', $reporter_id, $target_id)) {
                return $this->error(__('当前账号没有举报用户的权限', 'aksrt'), 403);
            }
        }

        $report_id = \AKSRT\Messages\ReportCenter::get_instance()->submit(
            $reporter_id,
            $target_type,
            $target_id,
            $reason,
            $category
        );

        if ($report_id > 0) {
            return $this->success([
                'message' => __('举报已提交，我们会尽快处理', 'aksrt'),
                'data'    => ['report_id' => $report_id],
            ]);
        }

        return $this->error(__('举报提交失败', 'aksrt'));
    }
}