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

namespace AKSRT\Admin;

defined('ABSPATH') || exit;

trait ShopControllerFulfillmentOperations {

    /**
     * GET /shop/after-sale — 售后工单列表
     */
    public function get_after_sale_list(\WP_REST_Request $request): \WP_REST_Response {
        if (!class_exists('\AKSRT\Payment\AfterSale')) {
            return $this->success(['data' => ['items' => [], 'total' => 0, 'page' => 1, 'max_pages' => 1]]);
        }

        $page      = max(1, (int) $request->get_param('page'));
        $per_page  = max(1, min(100, (int) $request->get_param('per_page'))) ?: 20;
        $status    = sanitize_key((string) $request->get_param('status'));
        $stage     = sanitize_key((string) $request->get_param('stage'));
        $order     = sanitize_text_field((string) $request->get_param('order_number'));
        $type      = sanitize_key((string) $request->get_param('type'));
        $date_from = sanitize_text_field((string) $request->get_param('date_from'));
        $date_to   = sanitize_text_field((string) $request->get_param('date_to'));

        $result = \AKSRT\Payment\AfterSale::get_instance()->get_list([
            'limit'                 => $per_page,
            'offset'                => ($page - 1) * $per_page,
            'status'                => $status,
            'stage'                 => $stage,
            'order_number'          => $order,
            'type'                  => $type,
            'date_from'             => $date_from,
            'date_to'               => $date_to,
            'include_order_context' => true,
        ]);

        $stats = \AKSRT\Payment\AfterSale::get_instance()->get_stats();

        return $this->success(['data' => array_merge($result, [
            'stats' => $stats,
            'filters' => [
                'status'       => $status,
                'stage'        => $stage,
                'order_number' => $order,
                'type'         => $type,
                'date_from'    => $date_from,
                'date_to'      => $date_to,
            ],
            'options' => [
                'status' => \AKSRT\Payment\AfterSale::get_status_options(),
                'stage'  => \AKSRT\Payment\AfterSale::get_stage_options(),
                'type'   => \AKSRT\Payment\AfterSale::get_type_options(),
            ],
        ])]);
    }

    /**
     * POST /shop/after-sale — 创建售后工单
     */
    public function create_after_sale(\WP_REST_Request $request): \WP_REST_Response {
        if (!class_exists('\AKSRT\Payment\AfterSale')) {
            return $this->error('售后系统未启用', 500);
        }

        $params = $this->get_json_params($request);
        $order_number = sanitize_text_field((string) ($params['order_number'] ?? ''));
        $reason       = sanitize_textarea_field((string) ($params['reason'] ?? ''));

        if ($order_number === '' || $reason === '') {
            return $this->error('订单号和原因不能为空');
        }

        $order = class_exists('\AKSRT\Payment\OrderRepository')
            ? \AKSRT\Payment\OrderRepository::get_instance()->get($order_number)
            : null;

        if (!$order) {
            return $this->error(__('订单不存在', 'aksrt'), 404);
        }

        unset($params['user_id'], $params['applicant_user_id']);
        $id = \AKSRT\Payment\AfterSale::get_instance()->create($params);

        if (is_wp_error($id)) {
            return $this->error($id->get_error_message(), 422);
        }
        if ($id > 0) {
            return $this->success([
                'message' => __('售后工单已创建', 'aksrt'),
                'data'    => ['id' => $id],
            ], 201);
        }

        return $this->error(__('创建失败', 'aksrt'));
    }

    /**
     * POST /shop/after-sale/{id}/update-status — 更新售后工单状态
     */
    public function update_after_sale_status(\WP_REST_Request $request): \WP_REST_Response {
        if (!class_exists('\AKSRT\Payment\AfterSale')) {
            return $this->error('售后系统未启用', 500);
        }

        $id         = (int) $request->get_param('id');
        $params     = $this->get_json_params($request);
        $new_status = sanitize_key((string) ($params['status'] ?? ''));
        $note       = sanitize_textarea_field((string) ($params['operator_note'] ?? ''));

        if ($id <= 0 || $new_status === '') {
            return $this->error('参数无效');
        }

        $success = \AKSRT\Payment\AfterSale::get_instance()->update_status(
            $id,
            $new_status,
            get_current_user_id(),
            $note
        );

        if ($success) {
            return $this->success(['message' => __('状态已更新', 'aksrt')]);
        }
        return $this->error(__('更新失败', 'aksrt'));
    }

    /**
     * GET /shop/shipping — 发货记录列表
     */
    public function get_shipping_list(\WP_REST_Request $request): \WP_REST_Response {
        if (!class_exists('\AKSRT\Payment\Shipping')) {
            return $this->success(['data' => ['items' => [], 'total' => 0, 'page' => 1, 'max_pages' => 1]]);
        }

        $page        = max(1, (int) $request->get_param('page'));
        $per_page    = max(1, min(100, (int) $request->get_param('per_page'))) ?: 20;
        $status      = sanitize_key((string) $request->get_param('status'));
        $order       = sanitize_text_field((string) $request->get_param('order_number'));
        $date_from   = sanitize_text_field((string) $request->get_param('date_from'));
        $date_to     = sanitize_text_field((string) $request->get_param('date_to'));
        $tracking_no = sanitize_text_field((string) $request->get_param('tracking_no'));

        $result = \AKSRT\Payment\Shipping::get_instance()->get_list([
            'limit'                 => $per_page,
            'offset'                => ($page - 1) * $per_page,
            'status'                => $status,
            'order_number'          => $order,
            'date_from'             => $date_from,
            'date_to'               => $date_to,
            'tracking_no'           => $tracking_no,
            'include_order_context' => true,
        ]);

        $stats = \AKSRT\Payment\Shipping::get_instance()->get_stats();

        return $this->success(['data' => array_merge($result, [
            'stats' => $stats,
            'filters' => [
                'status'       => $status,
                'order_number' => $order,
                'date_from'    => $date_from,
                'date_to'      => $date_to,
                'tracking_no'  => $tracking_no,
            ],
            'options' => [
                'status'  => \AKSRT\Payment\Shipping::get_status_options(),
                'carrier' => \AKSRT\Payment\Shipping::get_carrier_options(),
            ],
        ])]);
    }

    /**
     * POST /shop/shipping — 创建发货记录
     */
    public function create_shipping(\WP_REST_Request $request): \WP_REST_Response {
        if (!class_exists('\AKSRT\Payment\Shipping')) {
            return $this->error('物流系统未启用', 500);
        }

        $params = $this->get_json_params($request);
        $order_number = sanitize_text_field((string) ($params['order_number'] ?? ''));
        $carrier      = sanitize_text_field((string) ($params['carrier'] ?? ''));
        $tracking_no  = sanitize_text_field((string) ($params['tracking_no'] ?? ''));

        if ($order_number === '' || $carrier === '' || $tracking_no === '') {
            return $this->error('订单号、快递公司和物流单号不能为空');
        }

        $order = class_exists('\AKSRT\Payment\OrderRepository')
            ? \AKSRT\Payment\OrderRepository::get_instance()->get($order_number)
            : null;

        if (!$order) {
            return $this->error(__('订单不存在', 'aksrt'), 404);
        }

        $params['operator_id'] = get_current_user_id();

        $id = \AKSRT\Payment\Shipping::get_instance()->create($params);

        if ($id > 0) {
            return $this->success([
                'message' => __('发货记录已创建', 'aksrt'),
                'data'    => ['id' => $id],
            ], 201);
        }

        return $this->error(__('创建失败', 'aksrt'));
    }

    /**
     * POST /shop/shipping/{id}/update-status — 更新发货状态
     */
    public function update_shipping_status(\WP_REST_Request $request): \WP_REST_Response {
        if (!class_exists('\AKSRT\Payment\Shipping')) {
            return $this->error('物流系统未启用', 500);
        }

        $id         = (int) $request->get_param('id');
        $params     = $this->get_json_params($request);
        $new_status = sanitize_key((string) ($params['status'] ?? ''));
        $note       = sanitize_textarea_field((string) ($params['note'] ?? ''));

        if ($id <= 0 || $new_status === '') {
            return $this->error('参数无效');
        }

        $success = \AKSRT\Payment\Shipping::get_instance()->update_status($id, $new_status, $note, get_current_user_id());

        if ($success) {
            return $this->success(['message' => __('状态已更新', 'aksrt')]);
        }
        return $this->error(__('更新失败', 'aksrt'));
    }

    public function get_after_sale_detail(\WP_REST_Request $request): \WP_REST_Response {
        if (!class_exists('\AKSRT\Payment\AfterSale')) {
            return $this->error('售后系统未启用', 500);
        }

        $id = (int) $request->get_param('id');
        if ($id <= 0) {
            return $this->error('参数无效');
        }

        $record = \AKSRT\Payment\AfterSale::get_instance()->get_with_order_context($id);
        if (!$record) {
            return $this->error(__('售后工单不存在', 'aksrt'), 404);
        }

        return $this->success([
            'data' => [
                'record'   => $record,
                'timeline' => $this->build_after_sale_timeline($record),
            ],
        ]);
    }

    public function get_shipping_detail(\WP_REST_Request $request): \WP_REST_Response {
        if (!class_exists('\AKSRT\Payment\Shipping')) {
            return $this->error('物流系统未启用', 500);
        }

        $id = (int) $request->get_param('id');
        if ($id <= 0) {
            return $this->error('参数无效');
        }

        $record = \AKSRT\Payment\Shipping::get_instance()->get_with_order_context($id);
        if (!$record) {
            return $this->error(__('发货记录不存在', 'aksrt'), 404);
        }

        return $this->success([
            'data' => [
                'record'   => $record,
                'timeline' => $this->build_shipping_timeline($record),
            ],
        ]);
    }

    public function batch_update_shipping_status(\WP_REST_Request $request): \WP_REST_Response {
        if (!class_exists('\AKSRT\Payment\Shipping')) {
            return $this->error('物流系统未启用', 500);
        }

        $params = $this->get_json_params($request);
        $ids = is_array($params['ids'] ?? null) ? $params['ids'] : [];
        $status = sanitize_key((string) ($params['status'] ?? ''));
        $note = sanitize_textarea_field((string) ($params['note'] ?? ''));

        if (empty($ids) || $status === '') {
            return $this->error('参数无效');
        }

        $result = \AKSRT\Payment\Shipping::get_instance()->batch_update_status($ids, $status, $note, get_current_user_id());

        return $this->success([
            'message' => __('批量状态更新已执行', 'aksrt'),
            'data' => $result,
        ]);
    }

    private function build_shipping_timeline(array $record): array {
        $timeline = [];

        foreach ([
            'created_at'   => __('创建发货记录', 'aksrt'),
            'updated_at'   => __('更新物流状态', 'aksrt'),
            'delivered_at' => __('确认签收', 'aksrt'),
        ] as $field => $label) {
            if (!empty($record[$field])) {
                $timeline[] = [
                    'time'  => (string) $record[$field],
                    'label' => $label,
                ];
            }
        }

        usort($timeline, static function ($a, $b) {
            return strcmp((string) ($a['time'] ?? ''), (string) ($b['time'] ?? ''));
        });

        return $timeline;
    }

    private function build_after_sale_timeline(array $record): array {
        $timeline = [];

        foreach ([
            'created_at'  => __('提交售后申请', 'aksrt'),
            'updated_at'  => __('更新售后状态', 'aksrt'),
            'resolved_at' => __('售后处理结束', 'aksrt'),
        ] as $field => $label) {
            if (!empty($record[$field])) {
                $timeline[] = [
                    'time'  => (string) $record[$field],
                    'label' => $label,
                ];
            }
        }

        usort($timeline, static function ($a, $b) {
            return strcmp((string) ($a['time'] ?? ''), (string) ($b['time'] ?? ''));
        });

        return $timeline;
    }
}