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 = `@openscript-ch/starlight-theme/overrides/${override}.astro`;

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

  return components;
}

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