<?php

namespace app\api\controller;

use think\Db;

class Country extends Base
{
    public function __construct(\think\Request $request = null)
    {
        parent::__construct($request);
    }

    /**
     * 国家列表（支持筛选 + 分页）
     *
     * 参数:
     *   keyword    - 搜索中文名/英文名/code
     *   is_hot     - 0/1 筛选热门
     *   partition  - 分区 1/2/3
     *   page       - 页码（默认1）
     *   per_page   - 每页条数（默认20，最大100）
     */
    public function getList()
    {
        $keyword   = trim($this->request->param('keyword', ''));
        $isHot     = $this->request->param('is_hot', '');
        $partition = $this->request->param('partition', '');
        $page      = max(1, intval($this->request->param('page', 1)));
        $perPage   = max(1, min(intval($this->request->param('per_page', 20)), 100));

        $query = Db::name('country');

        if ($keyword !== '') {
            $query->where('zh_name|en_name|code', 'like', '%' . $keyword . '%');
        }
        if ($isHot !== '' && $isHot !== '-1') {
            $query->where('is_hot', intval($isHot));
        }
        if ($partition !== '' && $partition !== '-1') {
            $query->where('partition', intval($partition));
        }

        $total = (clone $query)->count();

        $list = $query
            ->order('is_hot desc, zh_name asc')
            ->page($page, $perPage)
            ->select();

        return jsonSuccess([
            'list'        => $list,
            'total'       => $total,
            'page'        => $page,
            'per_page'    => $perPage,
            'total_pages' => $total > 0 ? ceil($total / $perPage) : 0,
        ]);
    }

    /**
     * 国家下拉选项（不分页，用于筛选器）
     *
     * 参数:
     *   hot_only  - 1 则只返回热门国家
     *   partition - 按分区筛选
     */
    public function getOptions()
    {
        $hotOnly   = intval($this->request->param('hot_only', 0));
        $partition = $this->request->param('partition', '');

        $query = Db::name('country');

        if ($hotOnly) {
            $query->where('is_hot', 1);
        }
        if ($partition !== '' && $partition !== '-1') {
            $query->where('partition', intval($partition));
        }

        $list = $query
            ->field('country_id, zh_name, en_name, code, is_hot, partition')
            ->order('is_hot desc, zh_name asc')
            ->select();

        return jsonSuccess($list);
    }

    /**
     * 国家详情
     */
    public function getDetail()
    {
        $id = intval($this->request->param('country_id', 0));
        if (!$id) {
            return jsonError('country_id is required');
        }

        $row = Db::name('country')->where('country_id', $id)->find();
        if (!$row) {
            return jsonError('Country not found');
        }

        return jsonSuccess($row);
    }

    /**
     * 新增国家
     */
    public function add()
    {
        $data = $this->request->post();

        $zhName  = trim(isset($data['zh_name']) ? $data['zh_name'] : '');
        $enName  = trim(isset($data['en_name']) ? $data['en_name'] : '');
        $code    = strtoupper(trim(isset($data['code']) ? $data['code'] : ''));

        if ($zhName === '' && $enName === '') {
            return jsonError('zh_name 或 en_name 至少填一个');
        }

        if ($code !== '') {
            $exists = Db::name('country')->where('code', $code)->find();
            if ($exists) {
                return jsonError('code 已存在: ' . $code);
            }
        }

        $id = Db::name('country')->insertGetId([
            'zh_name'   => mb_substr($zhName, 0, 32),
            'en_name'   => mb_substr($enName, 0, 256),
            'code'      => mb_substr($code, 0, 32),
            'is_hot'    => intval(isset($data['is_hot']) ? $data['is_hot'] : 0),
            'partition' => intval(isset($data['partition']) ? $data['partition'] : 2),
        ]);

        return jsonSuccess(['country_id' => $id]);
    }

    /**
     * 编辑国家
     */
    public function edit()
    {
        $data = $this->request->post();
        $id   = intval(isset($data['country_id']) ? $data['country_id'] : 0);
        if (!$id) {
            return jsonError('country_id is required');
        }

        $row = Db::name('country')->where('country_id', $id)->find();
        if (!$row) {
            return jsonError('Country not found');
        }

        $update = [];

        if (isset($data['zh_name'])) {
            $update['zh_name'] = mb_substr(trim($data['zh_name']), 0, 32);
        }
        if (isset($data['en_name'])) {
            $update['en_name'] = mb_substr(trim($data['en_name']), 0, 256);
        }
        if (isset($data['code'])) {
            $code = strtoupper(trim($data['code']));
            $dup = Db::name('country')->where('code', $code)->where('country_id', '<>', $id)->find();
            if ($dup) {
                return jsonError('code 已被其他国家使用: ' . $code);
            }
            $update['code'] = mb_substr($code, 0, 32);
        }
        if (isset($data['is_hot'])) {
            $update['is_hot'] = intval($data['is_hot']);
        }
        if (isset($data['partition'])) {
            $update['partition'] = intval($data['partition']);
        }

        if (empty($update)) {
            return jsonError('没有可更新的字段');
        }

        Db::name('country')->where('country_id', $id)->update($update);

        return jsonSuccess([]);
    }

    /**
     * 删除国家
     */
    public function delete()
    {
        $id = intval($this->request->param('country_id', 0));
        if (!$id) {
            return jsonError('country_id is required');
        }

        $used = Db::name('expert')->where('country_id', $id)->count();
        if ($used > 0) {
            return jsonError('该国家下有 ' . $used . ' 位专家关联，无法删除');
        }

        Db::name('country')->where('country_id', $id)->delete();

        return jsonSuccess([]);
    }

    /**
     * 批量设置热门
     */
    public function setHot()
    {
        $ids   = $this->request->param('country_ids', '');
        $isHot = intval($this->request->param('is_hot', 1));

        if (empty($ids)) {
            return jsonError('country_ids is required');
        }

        $idArr = array_map('intval', explode(',', $ids));
        $count = Db::name('country')->where('country_id', 'in', $idArr)->update(['is_hot' => $isHot]);

        return jsonSuccess(['affected' => $count]);
    }

    /**
     * 批量设置分区
     */
    public function setPartition()
    {
        $ids       = $this->request->param('country_ids', '');
        $partition = intval($this->request->param('partition', 2));

        if (empty($ids)) {
            return jsonError('country_ids is required');
        }

        $idArr = array_map('intval', explode(',', $ids));
        $count = Db::name('country')->where('country_id', 'in', $idArr)->update(['partition' => $partition]);

        return jsonSuccess(['affected' => $count]);
    }
}