import { defineConfig } from 'vite'
import { cardArtRoot, scanCardCatalog, writeCardCatalog } from './scripts/card-catalog.mjs'

function cardCatalogPlugin() {
  return {
    name: 'card-catalog',
    async buildStart() {
      const catalog = await writeCardCatalog()
      if (!catalog.cards.length || catalog.errors.length) {
        this.error(`Invalid card catalog:\n${catalog.errors.join('\n') || 'No valid card pairs found'}`)
      }
    },
    configureServer(server) {
      server.middlewares.use('/__card_catalog', async (_request, response) => {
        try {
          const catalog = await scanCardCatalog()
          response.statusCode = 200
          response.setHeader('Content-Type', 'application/json')
          response.setHeader('Cache-Control', 'no-store')
          response.end(JSON.stringify(catalog))
        } catch (error) {
          response.statusCode = 500
          response.setHeader('Content-Type', 'application/json')
          response.end(JSON.stringify({
            error: error instanceof Error ? error.message : String(error),
          }))
        }
      })
      server.watcher.add(cardArtRoot)
      server.watcher.on('all', (_event, path) => {
        if (path.startsWith(cardArtRoot) && path.toLowerCase().endsWith('.png')) {
          server.ws.send({ type: 'custom', event: 'card-catalog:update' })
        }
      })
    },
  }
}

export default defineConfig({
  plugins: [cardCatalogPlugin()],
})