<?php
// +----------------------------------------------------------------------
// | YwxApp [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2026-2036 http://ywxapp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Author: ywxapp<admin@ywxapp.cn>
// +----------------------------------------------------------------------
declare(strict_types=1);

namespace addon\iot\controller\backend;

use think\facade\Db;
use think\facade\View;
use ywxapp\controller\BackendBase;
use addon\iot\service\OtaService;

/**
 * OTA 固件控制器（P4：固件上传 / 下发升级指令 / 进度上报）
 */
class Ota extends BackendBase
{
    /**
     * OTA 管理页（固件列表 + 设备多选下发）
     */
    public function ota()
    {
        $devices = Db::name('iot_device')
            ->field('uuid,title,model')->order('id', 'desc')->select()->toArray();
        // 先做 JSON_HEX_* 转义（<>&'"→\uXXXX）再注入模板，避免模板默认 htmlentities
        // 对 json 中的引号做二次转义导致 JS 字面量失效（SyntaxError: Unexpected token '&'）
        View::assign('devicesJson', (string) json_encode($devices, JSON_UNESCAPED_UNICODE
            | JSON_HEX_TAG | JSON_HEX_AMP | JSON_HEX_APOS | JSON_HEX_QUOT));
        return View::fetch('admin/ota');
    }

    /**
     * 固件列表（JSON，支持按型号过滤）
     */
    public function otaList()
    {
        $model = trim((string) input('get.model', ''));
        $this->result->success(['list' => OtaService::list($model)]);
    }

    /**
     * 固件列表（layui.table 分页版，按型号过滤）
     */
    public function otaTable()
    {
        $model = trim((string) input('get.model', ''));
        $page  = max(1, (int) input('get.page', 1));
        $limit = (int) input('get.limit', 10);
        if ($limit < 1 || $limit > 100) {
            $limit = 10;
        }
        OtaService::ensureTable();
        $q = Db::name('iot_ota');
        if ($model !== '') {
            $q->where('model', $model);
        }
        $count = (clone $q)->count();
        $rows  = $q->order('id', 'desc')->page($page, $limit)->select()->toArray();
        $this->result->success(['list' => $rows, 'count' => $count]);
    }

    /**
     * 上传并登记固件（保存到 public/upload/ota，自动计算 SHA256）
     */
    public function saveOta()
    {
        $model   = trim((string) input('post.model', ''));
        $version = trim((string) input('post.version', ''));
        $remark  = trim((string) input('post.remark', ''));
        $status  = (int) input('post.status', 1);
        if ($model === '' || $version === '') {
            $this->result->error('设备型号与版本号必填');
        }
        $file = $this->request->file('file');
        if (empty($file)) {
            // 常见原因：文件超过 php upload_max_filesize / post_max_size 时 $_FILES 为空或仅有错误码
            $this->result->error('未收到固件文件（请确认文件未超过服务器上传大小限制）');
        }
        $ext = strtolower((string) pathinfo($file->getOriginalName(), PATHINFO_EXTENSION));
        if (!in_array($ext, ['bin', 'zip', 'hex'], true)) {
            $this->result->error('仅支持 bin / zip / hex 格式固件');
        }
        $hash = hash_file('sha256', $file->getRealPath());
        if (!$hash) {
            $this->result->error('固件文件读取失败');
        }
        $dir = root_path() . 'public' . DIRECTORY_SEPARATOR . 'upload' . DIRECTORY_SEPARATOR . 'ota';
        if (!is_dir($dir)) {
            @mkdir($dir, 0755, true);
        }
        $saveName = substr($hash, 0, 16) . '_' . preg_replace('/[^\w.\-]+/', '_', $version)
            . '_' . preg_replace('/[^\w.\-]+/', '_', $file->getOriginalName());
        try {
            $file->move($dir, $saveName);
        } catch (\Throwable $e) {
            $this->result->error('固件保存失败：' . $e->getMessage()
                . '（若提示超限，请调大 upload_max_filesize / post_max_size）');
        }
        $abs = realpath($dir . DIRECTORY_SEPARATOR . $saveName);
        if (!$abs || !is_file($abs)) {
            $this->result->error('固件保存失败');
        }
        try {
            $id = OtaService::add([
                'model'     => $model,
                'version'   => $version,
                'filename'  => $file->getOriginalName(),
                'file_hash' => hash_file('sha256', $abs),
                'size'      => (int) filesize($abs),
                'url'       => rtrim((string) $this->request->domain(), '/') . '/upload/ota/' . rawurlencode($saveName),
                'remark'    => $remark,
                'status'    => $status,
            ]);
        } catch (\Throwable $e) {
            @unlink($abs);
            $this->result->error('登记失败：' . $e->getMessage());
        }
        $this->result->success(['id' => $id]);
    }

    /**
     * 删除固件（连带删除本地上传文件）
     */
    public function deleteOta()
    {
        $id  = (int) input('post.id', 0);
        $ota = Db::name('iot_ota')->where('id', $id)->find();
        if ($ota) {
            OtaService::remove($id);
            if (preg_match('#/upload/ota/([^/]+)$#', (string) $ota['url'], $m)) {
                $abs = root_path() . 'public' . DIRECTORY_SEPARATOR . 'upload' . DIRECTORY_SEPARATOR . 'ota'
                    . DIRECTORY_SEPARATOR . rawurldecode($m[1]);
                if (is_file($abs)) {
                    @unlink($abs);
                }
            }
        }
        $this->result->success('已删除');
    }

    /**
     * 启停固件（停用后不可再下发）
     */
    public function toggleOta()
    {
        $id      = (int) input('post.id', 0);
        $enabled = (int) input('post.enabled', 1);
        Db::name('iot_ota')->where('id', $id)->update(['status' => $enabled ? 1 : 0]);
        $this->result->success('已更新');
    }

    /**
     * 向选中的设备下发升级指令（离线设备待上线后由 outbox 补发）
     */
    public function publishOta()
    {
        $otaId = (int) input('post.ota_id', 0);
        $uuids = input('post.uuids/a', []);
        if (!$otaId) {
            $this->result->error('固件不能为空');
        }
        $uuids = array_values(array_filter((array) $uuids, fn($v) => trim((string) $v) !== ''));
        if (!$uuids) {
            $this->result->error('请选择目标设备');
        }
        try {
            $n = OtaService::publish($otaId, $uuids);
        } catch (\Throwable $e) {
            $this->result->error($e->getMessage());
        }
        $this->result->success("已向 {$n} 台设备下发升级指令（离线设备上线后自动补发）");
    }
}