<?php
if ( ! defined( 'ABSPATH' ) ) exit;

class VV_GDPR {

    public function __construct() {
        add_filter( 'wp_privacy_personal_data_exporters', [ $this, 'register_exporter' ] );
        add_filter( 'wp_privacy_personal_data_erasers',   [ $this, 'register_eraser' ] );
    }

    public function register_exporter( $exporters ) {
        $exporters['vendorverse'] = [
            'exporter_friendly_name' => __( 'VendorVerse Vendor Data', 'vendorverse' ),
            'callback'               => [ $this, 'export_vendor_data' ],
        ];
        return $exporters;
    }

    public function register_eraser( $erasers ) {
        $erasers['vendorverse'] = [
            'eraser_friendly_name' => __( 'VendorVerse Vendor Data', 'vendorverse' ),
            'callback'             => [ $this, 'erase_vendor_data' ],
        ];
        return $erasers;
    }

    public function export_vendor_data( $email, $page = 1 ) {
        global $wpdb;
        $user = get_user_by( 'email', $email );
        if ( ! $user ) return [ 'data' => [], 'done' => true ];

        $uid  = $user->ID;
        $data = [];

        // Transactions
        $txns = $wpdb->get_results( $wpdb->prepare(
            "SELECT * FROM {$wpdb->prefix}vv_wallet_transactions WHERE user_id=%d", $uid
        ) );
        foreach ( $txns as $t ) {
            $data[] = [
                'group_id'   => 'vv_transactions',
                'group_label'=> __( 'VendorVerse Transactions', 'vendorverse' ),
                'item_id'    => 'txn-' . $t->id,
                'data'       => [
                    [ 'name' => 'Date',        'value' => $t->created_at ],
                    [ 'name' => 'Amount',      'value' => $t->amount ],
                    [ 'name' => 'Type',        'value' => $t->type ],
                    [ 'name' => 'Description', 'value' => $t->description ],
                ],
            ];
        }

        // Withdrawals
        $withdrawals = $wpdb->get_results( $wpdb->prepare(
            "SELECT * FROM {$wpdb->prefix}vv_withdrawals WHERE vendor_id=%d", $uid
        ) );
        foreach ( $withdrawals as $w ) {
            $data[] = [
                'group_id'   => 'vv_withdrawals',
                'group_label'=> __( 'VendorVerse Withdrawals', 'vendorverse' ),
                'item_id'    => 'withdrawal-' . $w->id,
                'data'       => [
                    [ 'name' => 'Amount',  'value' => $w->amount ],
                    [ 'name' => 'Method',  'value' => $w->method ],
                    [ 'name' => 'Status',  'value' => $w->status ],
                    [ 'name' => 'Created', 'value' => $w->created_at ],
                ],
            ];
        }

        // Bank details
        $bank_fields = [ 'vv_bank_account_name', 'vv_bank_account', 'vv_name_of_bank', 'vv_ifsc_code', 'vv_iban', 'vv_bic' ];
        $bank_data = [];
        foreach ( $bank_fields as $f ) {
            $val = get_user_meta( $uid, $f, true );
            if ( $val ) $bank_data[] = [ 'name' => ucwords( str_replace( '_', ' ', str_replace( 'vv_', '', $f ) ) ), 'value' => $val ];
        }
        if ( $bank_data ) {
            $data[] = [
                'group_id'   => 'vv_bank',
                'group_label'=> __( 'VendorVerse Bank Details', 'vendorverse' ),
                'item_id'    => 'bank-' . $uid,
                'data'       => $bank_data,
            ];
        }

        return [ 'data' => $data, 'done' => true ];
    }

    public function erase_vendor_data( $email, $page = 1 ) {
        global $wpdb;
        $user = get_user_by( 'email', $email );
        if ( ! $user ) return [ 'items_removed' => false, 'items_retained' => false, 'messages' => [], 'done' => true ];

        $uid = $user->ID;
        $removed = 0;

        $removed += $wpdb->delete( "{$wpdb->prefix}vv_wallet_transactions", [ 'user_id' => $uid ], [ '%d' ] );
        $removed += $wpdb->delete( "{$wpdb->prefix}vv_withdrawals",         [ 'vendor_id' => $uid ], [ '%d' ] );
        $removed += $wpdb->delete( "{$wpdb->prefix}vv_messages",            [ 'sender_id' => $uid ], [ '%d' ] );
        $removed += $wpdb->delete( "{$wpdb->prefix}vv_followers",           [ 'vendor_id' => $uid ], [ '%d' ] );
        $removed += $wpdb->delete( "{$wpdb->prefix}vv_followers",           [ 'customer_id' => $uid ], [ '%d' ] );

        $bank_fields = [ 'vv_bank_account_name', 'vv_bank_account', 'vv_name_of_bank', 'vv_ifsc_code', 'vv_iban', 'vv_bic', 'vv_lock_bank' ];
        foreach ( $bank_fields as $f ) delete_user_meta( $uid, $f );

        return [
            'items_removed'  => $removed > 0,
            'items_retained' => false,
            'messages'       => [ sprintf( __( '%d VendorVerse records removed.', 'vendorverse' ), $removed ) ],
            'done'           => true,
        ];
    }
}