/*
 *  exporters.ts
 *  Zyquo Cloud Web
 *
 *  Author: Simon-Pierre Boucher
 *  Mail: contact@spboucher.ai
 *
 *  Single-conversation exports (Markdown / JSON) and the all-data backup
 *  download — client-side file downloads, no server.
 */

import { exportAll } from '../storage/backup'
import type { Conversation } from '../types'

function download(filename: string, content: string, type: string): void {
  const blob = new Blob([content], { type })
  const url = URL.createObjectURL(blob)
  const a = document.createElement('a')
  a.href = url
  a.download = filename
  a.click()
  URL.revokeObjectURL(url)
}

function safeName(title: string): string {
  return title.replace(/[/\\:*?"<>|]/g, '-').slice(0, 80)
}

export function exportConversationMarkdown(conversation: Conversation): void {
  const lines: string[] = [`# ${conversation.title}`, '']
  lines.push(`*Model: ${conversation.modelID} (${conversation.provider})*`, '')
  if (conversation.systemPrompt) {
    lines.push(`> **System:** ${conversation.systemPrompt}`, '')
  }
  for (const message of conversation.messages) {
    const label = message.role === 'user' ? '**You**' : `**Assistant** (${message.modelID ?? ''})`
    lines.push(`${label}:`, '', message.text, '')
    if (message.citations && message.citations.length > 0) {
      lines.push(
        ...message.citations.map((c) => `[${c.index}]: ${c.url}${c.title ? ` "${c.title}"` : ''}`),
        ''
      )
    }
  }
  download(`${safeName(conversation.title)}.md`, lines.join('\n'), 'text/markdown')
}

export function exportConversationJSON(conversation: Conversation): void {
  download(
    `${safeName(conversation.title)}.json`,
    JSON.stringify(conversation, null, 2),
    'application/json'
  )
}

export async function downloadBackup(includeKeys: boolean): Promise<void> {
  const data = await exportAll(includeKeys)
  const stamp = new Date().toISOString().slice(0, 10)
  download(`zyquo-cloud-backup-${stamp}.json`, JSON.stringify(data, null, 2), 'application/json')
}