import { REQUIRED_TEXTURES } from './constants'
import type { FileChange } from './types'

/**
 * Build a formatted commit message based on the upload context.
 *
 * Symbols:
 * - ✅ = new file
 * - 🔄 = modified file
 * - ❌ = missing texture (new upload) or deleted file (update)
 * - Unchanged files are omitted entirely
 */
export function buildCommitMessage(
  folderName: string,
  destination: string,
  modelFilename: string,
  textureNames: string[],
  compressed: boolean,
  isReplace: boolean,
  fileChanges: Map<string, FileChange>,
  deletedFileNames: string[],
): string {
  const title = isReplace
    ? `update: upload-gltf update -> ${destination}/${folderName}`
    : `update: upload-gltf add a new model -> ${destination}/${folderName}`

  const lines: string[] = [title, '']

  // Model section — only show if changed or new
  const modelChange = fileChanges.get(modelFilename.toLowerCase())
  if (modelChange === 'new') {
    lines.push('📦 Model')
    lines.push(`  ✅ ${modelFilename}${compressed ? ' (compressed)' : ''}`)
  } else if (modelChange === 'changed') {
    lines.push('📦 Model')
    lines.push(`  🔄 ${modelFilename}${compressed ? ' (compressed)' : ''}`)
  }

  // Textures section — only show lines that have changes
  const foundTextures = new Set(
    textureNames.map((t) => t.toLowerCase().replace(/\.[^.]+$/, '')),
  )

  const textureLines: string[] = []

  for (const tex of REQUIRED_TEXTURES) {
    if (foundTextures.has(tex)) {
      const actual = textureNames.find(
        (t) => t.toLowerCase().replace(/\.[^.]+$/, '') === tex,
      )!
      const change = fileChanges.get(actual.toLowerCase())
      if (change === 'new') {
        textureLines.push(`  ✅ ${actual}`)
      } else if (change === 'changed') {
        textureLines.push(`  🔄 ${actual}`)
      }
    } else if (!isReplace) {
      textureLines.push(`  ❌ ${tex} (manquant)`)
    }
  }

  for (const name of deletedFileNames) {
    textureLines.push(`  ❌ ${name} (supprime)`)
  }

  if (textureLines.length > 0) {
    lines.push('🎨 Textures')
    lines.push(...textureLines)
  }

  return lines.join('\n')
}