import type { HookParameters } from '@astrojs/starlight/types'
import type { AstroIntegrationLogger } from 'astro'

export function overrideComponents(
  starlightConfig: StarlightUserConfig,
  overrides: ComponentOverride[],
  logger: AstroIntegrationLogger,
): StarlightUserConfig['components'] {
  const components = { ...starlightConfig.components }
  for (const override of overrides) {
    if (starlightConfig.components?.[override]) {
      const fallback = `starlight-theme-rapide/overrides/${override}.astro`

      logger.warn(`A \`<${override}>\` component override is already defined in your Starlight configuration.`)
      logger.warn(
        `To use \`starlight-theme-rapide\`, either remove this override or manually render the content from \`${fallback}\`.`,
      )
      continue
    }
    components[override] = `starlight-theme-rapide/overrides/${override}.astro`
  }

  return components
}

type StarlightUserConfig = HookParameters<'config:setup'>['config']
type ComponentOverride = keyof NonNullable<StarlightUserConfig['components']>