import { IIntegrationProvider, FindingPayload } from '../../domain/ports/IIntegrationProvider';

const SEVERITY_COLORS: Record<string, string> = {
  critical: '#dc2626',
  high: '#ea580c',
  medium: '#ca8a04',
  low: '#2563eb',
};

export class SlackProvider implements IIntegrationProvider {
  constructor(private readonly webhookUrl: string) {}

  async sendFinding(finding: FindingPayload): Promise<void> {
    const color = SEVERITY_COLORS[finding.severity] ?? '#6b7280';
    const payload = {
      blocks: [
        {
          type: 'header',
          text: { type: 'plain_text', text: `ABE Finding: ${finding.title}`, emoji: true },
        },
        {
          type: 'section',
          fields: [
            { type: 'mrkdwn', text: `*Severity:*\n${finding.severity.toUpperCase()}` },
            { type: 'mrkdwn', text: `*Type:*\n${finding.type}` },
          ],
        },
        {
          type: 'section',
          text: { type: 'mrkdwn', text: `*Description:*\n${finding.description}` },
        },
        {
          type: 'context',
          elements: [
            { type: 'mrkdwn', text: `Session: ${finding.sessionId}` },
          ],
        },
      ],
      attachments: [{ color, fallback: `${finding.severity.toUpperCase()} finding: ${finding.description}` }],
    };

    const res = await fetch(this.webhookUrl, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify(payload),
      signal: AbortSignal.timeout(10_000),
    });

    if (!res.ok) {
      throw new Error(`Slack webhook failed: ${res.status} ${await res.text()}`);
    }
  }
}