// SEE for the reference https://github.com/renovatebot/renovate/blob/c3e9e572b225085448d94aa121c7ec81c14d3955/lib/platform/bitbucket/utils.js
import { isNonEmptyString } from '@sindresorhus/is';
import { CONFIG_GIT_URL_UNAVAILABLE } from '../../../constants/error-messages.ts';
import { logger } from '../../../logger/index.ts';
import type { GitOptions, GitProtocol } from '../../../types/git.ts';
import type { HostRule } from '../../../types/index.ts';
import { coerceArray } from '../../../util/array.ts';
import * as git from '../../../util/git/index.ts';
import { regEx } from '../../../util/regex.ts';
import { ensureTrailingSlash, parseUrl } from '../../../util/url.ts';
import { getPrBodyStruct } from '../pr-body.ts';
import type { GitUrlOption } from '../types.ts';
import type { BbsPr, BbsRestPr, BbsRestRepo, BitbucketError } from './types.ts';

export const BITBUCKET_INVALID_REVIEWERS_EXCEPTION =
  'com.atlassian.bitbucket.pull.InvalidPullRequestReviewersException';

// https://docs.atlassian.com/bitbucket-server/rest/6.0.0/bitbucket-rest.html#idp250
const prStateMapping: any = {
  MERGED: 'merged',
  DECLINED: 'closed',
  OPEN: 'open',
};

export function prInfo(pr: BbsRestPr): BbsPr {
  return {
    version: pr.version,
    number: pr.id,
    bodyStruct: getPrBodyStruct(pr.description),
    sourceBranch: pr.fromRef.displayId,
    targetBranch: pr.toRef.displayId,
    title: pr.title,
    state: prStateMapping[pr.state],
    createdAt: pr.createdDate,
  };
}

export function isInvalidReviewersResponse(err: BitbucketError): boolean {
  const errors = coerceArray(err?.response?.body?.errors);
  return (
    errors.length > 0 &&
    errors.every(
      (error) => error.exceptionName === BITBUCKET_INVALID_REVIEWERS_EXCEPTION,
    )
  );
}

export function getInvalidReviewers(err: BitbucketError): string[] {
  const errors = coerceArray(err?.response?.body?.errors);
  let invalidReviewers: string[] = [];
  for (const error of errors) {
    // v8 ignore else -- TODO: add test #40625
    if (error.exceptionName === BITBUCKET_INVALID_REVIEWERS_EXCEPTION) {
      invalidReviewers = invalidReviewers.concat(
        coerceArray(
          error.reviewerErrors
            ?.map(({ context }) => context)
            .filter(isNonEmptyString),
        ),
      );
    }
  }

  return invalidReviewers;
}

function generateUrlFromEndpoint(
  defaultEndpoint: string,
  opts: HostRule,
  repository: string,
): string {
  const url = parseUrl(defaultEndpoint);
  if (!url) {
    throw new Error(`Invalid Bitbucket Server endpoint: ${defaultEndpoint}`);
  }
  const authString =
    opts.username && opts.password
      ? `${opts.username}:${opts.password}`
      : (opts.username ?? '');

  const generatedUrl = git.getUrl({
    protocol: url.protocol as GitProtocol,
    // TODO: types (#22198)
    auth: authString,
    host: `${url.host}${ensureTrailingSlash(url.pathname)}scm`,
    repository,
  });
  logger.debug(`Using generated endpoint URL: ${generatedUrl}`);
  return generatedUrl;
}

function injectAuth(url: string, opts: HostRule): string {
  const repoUrl = parseUrl(url);
  if (!repoUrl) {
    logger.debug(`Invalid url: ${url}`);
    throw new Error(CONFIG_GIT_URL_UNAVAILABLE);
  }
  // v8 ignore else -- TODO: add test #40625
  if (!opts.token && opts.username && opts.password) {
    repoUrl.username = opts.username;
    repoUrl.password = opts.password;
  }
  return repoUrl.toString();
}

export function getRepoGitUrl(
  repository: string,
  defaultEndpoint: string,
  gitUrl: GitUrlOption | undefined,
  info: BbsRestRepo,
  opts: HostRule,
): string {
  switch (gitUrl) {
    case 'endpoint': {
      const generatedUrl = generateUrlFromEndpoint(
        defaultEndpoint,
        opts,
        repository,
      );
      logger.debug(`Using endpoint URL: ${generatedUrl}`);
      return generatedUrl;
    }
    case 'ssh': {
      const sshUrl = info.links.clone?.find(({ name }) => name === 'ssh');
      if (sshUrl === undefined) {
        throw new Error(CONFIG_GIT_URL_UNAVAILABLE);
      }
      logger.debug(`Using ssh URL: ${sshUrl.href}`);
      return sshUrl.href;
    }
    case undefined:
    case 'default': {
      let cloneUrl = info.links.clone?.find(({ name }) => name === 'http');
      if (cloneUrl) {
        // Inject auth into the API provided URL
        return injectAuth(cloneUrl.href, opts);
      }
      // Http access might be disabled, try to find ssh url in this case
      cloneUrl = info.links.clone?.find(({ name }) => name === 'ssh');
      if (cloneUrl) {
        return cloneUrl.href;
      }
      // SSH urls can be used directly
      return generateUrlFromEndpoint(defaultEndpoint, opts, repository);
    }
  }
}

export function getExtraCloneOpts(opts: HostRule): GitOptions {
  if (opts.token) {
    return {
      '-c': `http.extraHeader=Authorization: Bearer ${opts.token}`,
    };
  }
  return {};
}

export function splitEscapedSpaces(str: string): string[] {
  const parts = str.split(' ');
  const result: string[] = [];
  let last: string | undefined;

  for (const part of parts) {
    if (last?.endsWith('\\\\')) {
      result[result.length - 1] = `${last.slice(0, -2)} ${part}`;
    } else {
      result.push(part);
    }
    last = result.at(-1);
  }

  return result;
}

export function parseModifier(value: string): number | null {
  const match = regEx('^random(?:\\((\\d+)\\))?$').exec(value);
  if (!match) {
    return null;
  }
  return parseInt(match[1] ?? '1', 10);
}