import { getSermonNote, getSermonBySlug, getUserByUsername, getDatabase } from '~/server/utils/database'
import { getSessionUsername } from '~/server/utils/auth'
import { sendSermonNotesEmail } from '~/server/utils/email'

export default defineEventHandler(async (event) => {
  const username = await getSessionUsername(event)
  
  if (!username) {
    throw createError({
      statusCode: 401,
      message: 'Unauthorized'
    })
  }

  const sermonId = parseInt(event.context.params?.sermonId || '')
  
  if (!sermonId) {
    throw createError({
      statusCode: 400,
      message: 'Invalid sermon ID'
    })
  }

  // Get user info
  const user = getUserByUsername(username)
  if (!user || !user.email) {
    throw createError({
      statusCode: 400,
      message: 'User email not found'
    })
  }

  // Get sermon info
  const db = getDatabase()
  const sermon = db.prepare('SELECT * FROM sermons WHERE id = ?').get(sermonId) as any
  
  if (!sermon) {
    throw createError({
      statusCode: 404,
      message: 'Sermon not found'
    })
  }

  // Get user's notes (already stored as HTML from rich text editor)
  const noteRecord = getSermonNote(user.id!, sermonId)
  let userNotes = noteRecord?.notes || '<p>No notes taken</p>'

  // Convert Tiptap HTML to email-friendly HTML with inline styles
  // Email clients don't support <style> blocks well, so we need inline styles
  userNotes = userNotes
    // Convert <mark> to <span> with inline background color (email clients often don't support <mark>)
    // Using bright highlighter yellow (#FFEB3B) that stands out against the light yellow notes background
    .replace(/<mark>/gi, '<span style="background-color: #FFEB3B; padding: 2px 4px; border-radius: 2px;">')
    .replace(/<\/mark>/gi, '</span>')
    // Add inline styles to other elements
    .replace(/<strong>/gi, '<strong style="font-weight: 700;">')
    .replace(/<em>/gi, '<em style="font-style: italic;">')
    .replace(/<u>/gi, '<u style="text-decoration: underline;">')
    .replace(/<s>/gi, '<s style="text-decoration: line-through;">')
    .replace(/<h2>/gi, '<h2 style="font-size: 1.5em; font-weight: 700; margin: 1em 0 0.5em; color: #333;">')
    .replace(/<h3>/gi, '<h3 style="font-size: 1.25em; font-weight: 600; margin: 0.75em 0 0.5em; color: #333;">')
    .replace(/<ul>/gi, '<ul style="padding-left: 1.5em; margin: 0.5em 0;">')
    .replace(/<ol>/gi, '<ol style="padding-left: 1.5em; margin: 0.5em 0;">')
    .replace(/<li>/gi, '<li style="margin: 0.25em 0;">')
    .replace(/<p>/gi, '<p style="margin: 0.5em 0;">')

  // Format bible references for HTML email
  let bibleReferencesText = ''
  try {
    const refs = JSON.parse(sermon.bible_references)
    bibleReferencesText = refs.map((ref: any) => 
      `<div style="margin-bottom: 15px;">
        <div style="font-weight: bold; margin-bottom: 5px;">${ref.reference} (${ref.version})</div>
        <div>${ref.text}</div>
      </div>`
    ).join('')
  } catch {
    bibleReferencesText = sermon.bible_references
  }

  // Format date
  const formatDate = (dateString: string) => {
    const date = new Date(dateString + 'T00:00:00')
    return date.toLocaleDateString('en-US', { 
      year: 'numeric', 
      month: 'long', 
      day: 'numeric' 
    })
  }

  const dates = [sermon.date]
  if (sermon.dates) {
    try {
      const additionalDates = JSON.parse(sermon.dates)
      dates.push(...additionalDates)
    } catch {}
  }
  const sermonDate = dates.map(formatDate).join(' - ')

  // Send email
  try {
    await sendSermonNotesEmail(
      user.email,
      user.first_name || user.username,
      sermon.title,
      sermonDate,
      bibleReferencesText,
      sermon.personal_appliance,
      sermon.pastors_challenge,
      userNotes,
      event
    )

    return {
      success: true,
      message: 'Notes emailed successfully'
    }
  } catch (error) {
    console.error('Failed to send email:', error)
    throw createError({
      statusCode: 500,
      message: 'Failed to send email'
    })
  }
})