import {
  CodeGenerator,
  type ConfigPlugin,
  withPodfile,
  withXcodeProject,
} from "expo/config-plugins";

import type { MapLibrePluginProps } from "./MapLibrePluginProps";

const { mergeContents, removeGeneratedContents } = CodeGenerator;

const TAG_PREFIX = `@maplibre/maplibre-react-native`;

/**
 * Only the post-install block is required, the post installer block is used for
 * SPM (Swift Package Manager) which Expo doesn't currently support.
 */
export function applyPodfilePostInstall(contents: string): string {
  const result = mergeContents({
    tag: `${TAG_PREFIX}:post-install`,
    src: contents,
    newSrc: `    $MLRN.post_install(installer)`,
    anchor: /post_install do \|installer\|/,
    offset: 1,
    comment: "#",
  });

  if (result.didMerge || result.didClear) {
    return result.contents;
  }

  return contents;
}

const withPodfilePostInstall: ConfigPlugin = (config) => {
  return withPodfile(config, (c) => {
    c.modResults.contents = applyPodfilePostInstall(c.modResults.contents);

    return c;
  });
};

export const applyPodfileGlobalVariables = (
  contents: string,
  props: MapLibrePluginProps,
): string => {
  const tag = `${TAG_PREFIX}:global-variables`;

  const globalVariables = [];

  if (props?.ios?.nativeVersion) {
    globalVariables.push(`$MLRN_NATIVE_VERSION = "${props.ios.nativeVersion}"`);
  }

  if (props?.ios?.spmSpec) {
    globalVariables.push(`$MLRN_SPM_SPEC = ${props.ios.spmSpec}`);
  }

  if (globalVariables.length > 0) {
    return mergeContents({
      tag,
      src: contents,
      newSrc: globalVariables.join("\n"),
      anchor: /target .+ do/,
      offset: 0,
      comment: "#",
    }).contents;
  }

  const modified = removeGeneratedContents(contents, tag);

  return modified ?? contents;
};

export const withPodfileGlobalVariables: ConfigPlugin<MapLibrePluginProps> = (
  config,
  props,
) => {
  return withPodfile(config, (c) => {
    c.modResults.contents = applyPodfileGlobalVariables(
      c.modResults.contents,
      props,
    );

    return c;
  });
};

/**
 * Set the Debug Information Format to DWARF with dSYM File during EAS Build for
 * Managed App https://github.com/expo/eas-cli/issues/968
 *
 * Set `artifactPath` in `eas.json`:
 *
 * ```json
 * "ios": {
 *    "artifactPath": "ios/build/*"
 *  }
 * ```
 */
const withDwarfDsym: ConfigPlugin = (config) => {
  return withXcodeProject(config, (c) => {
    c.modResults.debugInformationFormat = "dwarf-with-dsym";

    return c;
  });
};

export const ios = {
  withPodfilePostInstall,
  withPodfileGlobalVariables,
  withDwarfDsym,
};