<?php

namespace app\service;

use app\model\User;
use app\model\Company;
use app\util\FeishuUtil;
use app\util\HttpClient;
use Exception;

/**
 * 飞书通知服务
 * 提供多种卡片类型的消息通知功能
 */
class FeishuNotificationService
{
    private ?int $companyId = null;
    private ?int $appId = null;

    /**
     * 设置当前操作的公司
     */
    public function setCompany(int $companyId): self
    {
        $this->companyId = $companyId;
        return $this;
    }

    /**
     * 设置飞书应用ID（必须指定）
     */
    public function setApp(int $appId): self
    {
        $this->appId = $appId;
        return $this;
    }

    /**
     * 根据用户ID自动设置其最后登录的应用
     */
    public function setAppByUser(int $userId): self
    {
        $user = \app\model\User::find($userId);
        if (!$user) {
            throw new Exception('用户不存在');
        }

        $this->setCompany($user->company_id);

        // 使用用户最后登录的应用
        if ($user->feishu_app_id) {
            $this->appId = $user->feishu_app_id;
        } else {
            throw new Exception('用户未绑定飞书应用，请先通过飞书登录');
        }

        return $this;
    }

    /**
     * 获取飞书应用配置（必须先通过 setApp 或 setAppByUser 指定）
     */
    private function getAppConfig(): array
    {
        if (!$this->companyId) {
            throw new Exception('未设置公司ID');
        }

        if (!$this->appId) {
            throw new Exception('未指定飞书应用，请通过 setApp() 或 setAppByUser() 指定');
        }

        $app = \app\model\CompanyFeishuApp::where('company_id', $this->companyId)
            ->where('id', $this->appId)
            ->where('status', 1)
            ->first();

        if (!$app) {
            throw new Exception('指定的飞书应用不存在或未启用');
        }

        return $app->toArray();
    }

    /**
     * 获取 access_token
     */
    private function getAccessToken(): string
    {
        $app = $this->getAppConfig();
        return FeishuUtil::getAppAccessToken($app['id']);
    }

    /**
     * 获取用户在指定飞书应用下的 feishu_user_id
     */
    private function getFeishuUserId(int $userId, int $companyId): ?string
    {
        if (!$this->appId) {
            throw new Exception('未指定飞书应用，请先调用 setApp() 或 setAppByUser()');
        }

        $binding = \app\model\UserFeishuApp::where('user_id', $userId)
            ->where('company_id', $companyId)
            ->where('feishu_app_id', $this->appId)
            ->first();

        return $binding ? $binding->feishu_user_id : null;
    }

    /**
     * 发送审批通知
     *
     * @param array $params
     *   - user_id: 接收人ID
     *   - title: 通知标题
     *   - applicant: 申请人姓名
     *   - type: 申请类型
     *   - content: 申请内容摘要
     *   - url: 详情链接
     *   - order_id: 审批单ID（用于构建审批操作按钮）
     * @return bool
     */
    public function sendApprovalNotification(array $params): bool
    {
        $userId = $params['user_id'] ?? null;
        $applicantId = $params['applicant_id'] ?? null;

        error_log("📧 sendApprovalNotification 被调用: user_id={$userId}, applicant_id=" . ($applicantId ?? 'null'));

        if (!$userId) {
            error_log('❌ sendApprovalNotification: 缺少 user_id');
            return false;
        }

        try {
            $user = User::find($userId);
            if (!$user) {
                error_log("❌ sendApprovalNotification: 用户不存在, user_id={$userId}");
                return false;
            }

            // 从 user_feishu_apps 获取指定应用下的 feishu_user_id
            $feishuUserId = $this->getFeishuUserId($userId, $user->company_id);
            if (!$feishuUserId) {
                error_log("❌ sendApprovalNotification: 用户未绑定飞书应用, user_id={$userId}");
                return false;
            }

            // 检查是否是申请人自己 - 发送文本消息而不是卡片
            error_log("🔍 自审批检查前: applicant_id=" . var_export($applicantId, true) . ", user_id=" . var_export($userId, true));

            if ($applicantId && (int)$applicantId === (int)$userId) {
                error_log("🔄 检测到自审批，发送文本通知而不是卡片");
                return $this->sendTextNotification($feishuUserId, $params);
            }

            error_log("📨 发送卡片消息: 不是自审批");
            $card = $this->buildApprovalCard($params, $user->company_id);
            return $this->sendMessage($feishuUserId, $card);
        } catch (Exception $e) {
            error_log('❌ sendApprovalNotification 失败: ' . $e->getMessage());
            return false;
        }
    }

    /**
     * 发送系统通知
     *
     * @param array $params
     *   - user_ids: 接收人ID数组
     *   - title: 通知标题
     *   - content: 通知内容
     *   - url: 跳转链接（可选）
     * @return array 返回每个用户的发送结果
     */
    public function sendSystemNotification(array $params): array
    {
        $userIds = $params['user_ids'] ?? [];
        if (empty($userIds)) {
            error_log('❌ sendSystemNotification: 缺少 user_ids');
            return [];
        }

        $results = [];
        foreach ($userIds as $userId) {
            try {
                $user = User::find($userId);
                if (!$user) {
                    $results[$userId] = false;
                    continue;
                }

                // 从 user_feishu_apps 获取指定应用下的 feishu_user_id
                $feishuUserId = $this->getFeishuUserId($userId, $user->company_id);
                if (!$feishuUserId) {
                    $results[$userId] = false;
                    continue;
                }

                $card = $this->buildSystemCard($params, $user->company_id);
                $results[$userId] = $this->sendMessage($feishuUserId, $card);
            } catch (Exception $e) {
                error_log("❌ sendSystemNotification 失败: user_id={$userId}, error=" . $e->getMessage());
                $results[$userId] = false;
            }
        }

        return $results;
    }

    /**
     * 发送提醒通知
     *
     * @param array $params
     *   - user_id: 接收人ID
     *   - title: 提醒标题
     *   - content: 提醒内容
     *   - level: 提醒级别 (info/warning/urgent)
     *   - url: 跳转链接（可选）
     * @return bool
     */
    public function sendReminderNotification(array $params): bool
    {
        $userId = $params['user_id'] ?? null;
        if (!$userId) {
            error_log('❌ sendReminderNotification: 缺少 user_id');
            return false;
        }

        try {
            $user = User::find($userId);
            if (!$user) {
                error_log("❌ sendReminderNotification: 用户不存在, user_id={$userId}");
                return false;
            }

            // 从 user_feishu_apps 获取指定应用下的 feishu_user_id
            $feishuUserId = $this->getFeishuUserId($userId, $user->company_id);
            if (!$feishuUserId) {
                error_log("❌ sendReminderNotification: 用户未绑定飞书应用, user_id={$userId}");
                return false;
            }

            $card = $this->buildReminderCard($params, $user->company_id);
            return $this->sendMessage($feishuUserId, $card);
        } catch (Exception $e) {
            error_log('❌ sendReminderNotification 失败: ' . $e->getMessage());
            return false;
        }
    }

    /**
     * 批量发送通知
     *
     * @param array $params
     *   - user_ids: 接收人ID数组
     *   - type: 通知类型 (approval/system/reminder)
     *   - 其他参数根据类型不同而不同
     * @return array
     */
    public function sendBatchNotification(array $params): array
    {
        $userIds = $params['user_ids'] ?? [];
        $type = $params['type'] ?? 'system';

        $results = [];
        foreach ($userIds as $userId) {
            $notifyParams = array_merge($params, ['user_id' => $userId]);
            unset($notifyParams['user_ids']);

            switch ($type) {
                case 'approval':
                    $results[$userId] = $this->sendApprovalNotification($notifyParams);
                    break;
                case 'reminder':
                    $results[$userId] = $this->sendReminderNotification($notifyParams);
                    break;
                case 'system':
                default:
                    $results[$userId] = $this->sendSystemNotification(['user_ids' => [$userId]] + $params)[$userId] ?? false;
                    break;
            }
        }

        return $results;
    }

    /**
     * 构建审批通知卡片
     */
    private function buildApprovalCard(array $params, int $recipientCompanyId): array
    {
        $title = $params['title'] ?? '新的审批申请';
        $applicant = $params['applicant'] ?? '未知';
        $type = $params['type'] ?? '申请';
        $content = $params['content'] ?? '';
        $url = $params['url'] ?? '';
        $orderId = $params['order_id'] ?? null;

        // 构建卡片元素
        $elements = [];

        // 内容区域
        if ($content) {
            $elements[] = [
                'tag' => 'div',
                'text' => [
                    'content' => "**申请人**: {$applicant}\n**申请类型**: {$type}\n\n{$content}",
                    'tag' => 'lark_md',
                ],
            ];
        } else {
            $elements[] = [
                'tag' => 'div',
                'text' => [
                    'content' => "**申请人**: {$applicant}\n**申请类型**: {$type}",
                    'tag' => 'lark_md',
                ],
            ];
        }

        // 提示信息（如需备注请去详情页）
        if ($orderId) {
            $elements[] = [
                'tag' => 'div',
                'text' => [
                    'content' => "_如需添加备注，请点击「查看详情」进入详情页操作_",
                    'tag' => 'lark_md',
                ],
            ];
        }

        // 按钮区域：三个按钮在一行
        $buttonActions = [];

        // 通过按钮
        if ($orderId) {
            $buttonActions[] = [
                'tag' => 'button',
                'text' => [
                    'content' => '通过',
                    'tag' => 'plain_text',
                ],
                'type' => 'primary',
                'size' => 'medium',
                'value' => [
                    'action_type' => 'approve',
                    'order_id' => (int)$orderId,
                ],
            ];

            // 拒绝按钮
            $buttonActions[] = [
                'tag' => 'button',
                'text' => [
                    'content' => '拒绝',
                    'tag' => 'plain_text',
                ],
                'type' => 'danger',
                'size' => 'medium',
                'value' => [
                    'action_type' => 'reject',
                    'order_id' => (int)$orderId,
                ],
            ];
        }

        // 查看详情按钮（跳转链接）
        if ($url) {
            $separator = strpos($url, '?') !== false ? '&' : '?';
            $urlWithCompany = $url . $separator . 'company=' . $recipientCompanyId;

            $buttonActions[] = [
                'tag' => 'button',
                'text' => [
                    'content' => '查看详情',
                    'tag' => 'plain_text',
                ],
                'type' => 'default',
                'size' => 'medium',
                'url' => $urlWithCompany,
            ];
        }

        // 将所有按钮放在一个 action 元素中（会横向排列）
        if (!empty($buttonActions)) {
            $elements[] = [
                'tag' => 'action',
                'actions' => $buttonActions,
            ];
        }

        return [
            'config' => [
                'wide_screen_mode' => false,
            ],
            'header' => [
                'title' => [
                    'content' => "📋 {$title}",
                    'tag' => 'plain_text',
                ],
                'template' => 'blue',
            ],
            'elements' => $elements,
        ];
    }

    /**
     * 构建系统通知卡片
     */
    private function buildSystemCard(array $params, int $recipientCompanyId): array
    {
        $title = $params['title'] ?? '系统通知';
        $content = $params['content'] ?? '';
        $url = $params['url'] ?? '';

        $elements = [];

        if ($content) {
            $elements[] = [
                'tag' => 'div',
                'text' => [
                    'content' => $content,
                    'tag' => 'lark_md',
                ],
            ];
        }

        if ($url) {
            // 在 URL 后面添加公司参数
            $separator = strpos($url, '?') !== false ? '&' : '?';
            $urlWithCompany = $url . $separator . 'company=' . $recipientCompanyId;

            $elements[] = [
                'tag' => 'action',
                'actions' => [
                    [
                        'tag' => 'button',
                        'text' => [
                            'content' => '查看详情',
                            'tag' => 'plain_text',
                        ],
                        'type' => 'default',
                        'url' => $urlWithCompany,
                    ],
                ],
            ];
        }

        return [
            'config' => [
                'wide_screen_mode' => false,
            ],
            'header' => [
                'title' => [
                    'content' => "🔔 {$title}",
                    'tag' => 'plain_text',
                ],
                'template' => 'gray',
            ],
            'elements' => $elements,
        ];
    }

    /**
     * 构建提醒通知卡片
     */
    private function buildReminderCard(array $params, int $recipientCompanyId): array
    {
        $title = $params['title'] ?? '提醒';
        $content = $params['content'] ?? '';
        $level = $params['level'] ?? 'info'; // info, warning, urgent
        $url = $params['url'] ?? '';

        // 根据级别选择模板颜色
        $templateMap = [
            'info' => 'blue',
            'warning' => 'orange',
            'urgent' => 'red',
        ];
        $template = $templateMap[$level] ?? 'blue';

        // 根据级别选择图标
        $iconMap = [
            'info' => '💡',
            'warning' => '⚠️',
            'urgent' => '🚨',
        ];
        $icon = $iconMap[$level] ?? '💡';

        $elements = [];

        if ($content) {
            $elements[] = [
                'tag' => 'div',
                'text' => [
                    'content' => $content,
                    'tag' => 'plain_text',
                ],
            ];
        }

        if ($url) {
            // 在 URL 后面添加公司参数
            $separator = strpos($url, '?') !== false ? '&' : '?';
            $urlWithCompany = $url . $separator . 'company=' . $recipientCompanyId;

            $elements[] = [
                'tag' => 'action',
                'actions' => [
                    [
                        'tag' => 'button',
                        'text' => [
                            'content' => '查看',
                            'tag' => 'plain_text',
                        ],
                        'type' => 'primary',
                        'url' => $urlWithCompany,
                    ],
                ],
            ];
        }

        return [
            'config' => [
                'wide_screen_mode' => false,
            ],
            'header' => [
                'title' => [
                    'content' => "{$icon} {$title}",
                    'tag' => 'plain_text',
                ],
                'template' => $template,
            ],
            'elements' => $elements,
        ];
    }

    /**
     * 发送消息到飞书
     */
    private function sendMessage(string $feishuUserId, array $card): bool
    {
        try {
            $app = $this->getAppConfig();
            $token = $this->getAccessToken();

            $body = [
                'receive_id_type' => 'user_id',
                'receive_id' => $feishuUserId,
                'msg_type' => 'interactive',
                'content' => json_encode(['card' => $card]),
            ];

            error_log('📤 发送飞书消息: app_id=' . $app['app_id'] . ', feishu_user_id=' . $feishuUserId);
            error_log('📦 消息卡片: ' . json_encode($card, JSON_UNESCAPED_UNICODE));

            $content = json_encode($card);
            error_log('📤 发送的content: ' . $content);

            $response = HttpClient::httpPost(
                "https://open.feishu.cn/open-apis/im/v1/messages?receive_id_type=user_id",
                [
                    'receive_id' => $feishuUserId,
                    'msg_type' => 'interactive',
                    'content' => $content,
                ],
                [
                    'Authorization: Bearer ' . $token,
                ]
            );

            $code = $response['code'] ?? -1;
            error_log('📥 飞书响应: code=' . $code . ', msg=' . ($response['msg'] ?? 'null'));

            if ($code !== 0) {
                error_log('❌ 飞书消息发送失败: ' . json_encode($response));
            } else {
                error_log('✅ 飞书消息发送成功');
            }

            return $code === 0;
        } catch (Exception $e) {
            error_log('❌ sendMessage 异常: ' . $e->getMessage());
            return false;
        }
    }

    /**
     * 发送文本消息（用于自审批场景）
     */
    private function sendTextNotification(string $feishuUserId, array $params): bool
    {
        try {
            $title = $params['title'] ?? '审批申请';
            $type = $params['type'] ?? '申请';
            $content = $params['content'] ?? '';
            $url = $params['url'] ?? '';

            // 构建文本内容
            $text = "【{$title}】\n";
            $text .= "申请类型：{$type}\n";

            if ($content) {
                // 清理 markdown 格式，转为纯文本
                $content = preg_replace('/\*\*(.*?)\*\*/', '$1', $content);
                $content = str_replace('**', '', $content);
                $text .= "\n{$content}\n";
            }

            if ($url) {
                $text .= "\n👉 点击查看详情：{$url}";
            }

            // 发送文本消息
            return $this->sendText($feishuUserId, $text);
        } catch (Exception $e) {
            error_log('❌ sendTextNotification 异常: ' . $e->getMessage());
            return false;
        }
    }

    /**
     * 发送纯文本消息
     */
    private function sendText(string $feishuUserId, string $text): bool
    {
        try {
            $accessToken = $this->getAccessToken();
            if (!$accessToken) {
                error_log('❌ sendText: 获取 access_token 失败');
                return false;
            }

            $apiUrl = "https://open.feishu.cn/open-apis/im/v1/messages?receive_id_type=user_id";

            $requestData = [
                'receive_id' => $feishuUserId,
                'msg_type' => 'text',
                'content' => json_encode(['text' => $text]),
            ];

            error_log('📤 发送文本消息: feishu_user_id=' . $feishuUserId . ', text=' . substr($text, 0, 100));

            $response = \app\util\HttpClient::httpPost($apiUrl, $requestData, [
                'Authorization: Bearer ' . $accessToken,
            ]);

            $responseData = json_decode($response, true);
            $code = $responseData['code'] ?? -1;

            if ($code !== 0) {
                error_log('❌ 发送文本消息失败: ' . json_encode($responseData));
            } else {
                error_log('✅ 文本消息发送成功');
            }

            return $code === 0;
        } catch (Exception $e) {
            error_log('❌ sendText 异常: ' . $e->getMessage());
            return false;
        }
    }
}