import { BibleHighlight } from '@/types'
import { getAllHighlights, addHighlight, updateHighlight } from './highlight-manager'
import { mergeHighlights } from './sync-conflict-resolver'

export async function pullAndMergeHighlights(): Promise<BibleHighlight[]> {
  try {
    // Fetch all highlights from server
    const response = await fetch('/api/highlights/all')

    if (!response.ok) {
      console.error('Failed to pull highlights:', response.status)
      return []
    }

    const { highlights: serverHighlights } = await response.json()

    // Get local highlights
    const clientHighlights = await getAllHighlights()

    // Merge with conflict resolution
    const merged = mergeHighlights(clientHighlights, serverHighlights)

    // Update local storage with merged version
    for (const highlight of merged) {
      const existing = clientHighlights.find(h => h.id === highlight.id)
      if (existing) {
        // Update if different
        if (JSON.stringify(existing) !== JSON.stringify(highlight)) {
          await updateHighlight(highlight)
        }
      } else {
        // Add new highlights from server
        await addHighlight(highlight)
      }
    }

    return merged
  } catch (error) {
    console.error('Error pulling highlights:', error)
    return []
  }
}