/*
 * Copyright (C) 2011 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * 1. Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY GOOGLE INC. AND ITS CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GOOGLE INC.
 * OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
/**
 * @implements {Search.SearchScope}
 */
Sources.SourcesSearchScope = class {
  constructor() {
    // FIXME: Add title once it is used by search controller.
    this._searchId = 0;
    /** @type {!Array<!Workspace.UISourceCode>} */
    this._searchResultCandidates = [];
    /** @type {?function(!Search.SearchResult)} */
    this._searchResultCallback = null;
    /** @type {?function(boolean)} */
    this._searchFinishedCallback = null;
    /** @type {?Workspace.ProjectSearchConfig} */
    this._searchConfig = null;
  }

  /**
   * @param {!Workspace.UISourceCode} uiSourceCode1
   * @param {!Workspace.UISourceCode} uiSourceCode2
   * @return {number}
   */
  static _filesComparator(uiSourceCode1, uiSourceCode2) {
    if (uiSourceCode1.isDirty() && !uiSourceCode2.isDirty()) {
      return -1;
    }
    if (!uiSourceCode1.isDirty() && uiSourceCode2.isDirty()) {
      return 1;
    }
    const isFileSystem1 = uiSourceCode1.project().type() === Workspace.projectTypes.FileSystem &&
        !Persistence.persistence.binding(uiSourceCode1);
    const isFileSystem2 = uiSourceCode2.project().type() === Workspace.projectTypes.FileSystem &&
        !Persistence.persistence.binding(uiSourceCode2);
    if (isFileSystem1 !== isFileSystem2) {
      return isFileSystem1 ? 1 : -1;
    }
    const url1 = uiSourceCode1.url();
    const url2 = uiSourceCode2.url();
    if (url1 && !url2) {
      return -1;
    }
    if (!url1 && url2) {
      return 1;
    }
    return String.naturalOrderComparator(uiSourceCode1.fullDisplayName(), uiSourceCode2.fullDisplayName());
  }

  /**
   * @override
   * @param {!Common.Progress} progress
   */
  performIndexing(progress) {
    this.stopSearch();

    const projects = this._projects();
    const compositeProgress = new Common.CompositeProgress(progress);
    for (let i = 0; i < projects.length; ++i) {
      const project = projects[i];
      const projectProgress = compositeProgress.createSubProgress(project.uiSourceCodes().length);
      project.indexContent(projectProgress);
    }
  }

  /**
   * @return {!Array.<!Workspace.Project>}
   */
  _projects() {
    const searchInAnonymousAndContentScripts = Common.moduleSetting('searchInAnonymousAndContentScripts').get();

    return Workspace.workspace.projects().filter(project => {
      if (project.type() === Workspace.projectTypes.Service) {
        return false;
      }
      if (!searchInAnonymousAndContentScripts && project.isServiceProject()) {
        return false;
      }
      if (!searchInAnonymousAndContentScripts && project.type() === Workspace.projectTypes.ContentScripts) {
        return false;
      }
      return true;
    });
  }

  /**
   * @override
   * @param {!Workspace.ProjectSearchConfig} searchConfig
   * @param {!Common.Progress} progress
   * @param {function(!Search.SearchResult)} searchResultCallback
   * @param {function(boolean)} searchFinishedCallback
   */
  performSearch(searchConfig, progress, searchResultCallback, searchFinishedCallback) {
    this.stopSearch();
    this._searchResultCandidates = [];
    this._searchResultCallback = searchResultCallback;
    this._searchFinishedCallback = searchFinishedCallback;
    this._searchConfig = searchConfig;

    const promises = [];
    const compositeProgress = new Common.CompositeProgress(progress);
    const searchContentProgress = compositeProgress.createSubProgress();
    const findMatchingFilesProgress = new Common.CompositeProgress(compositeProgress.createSubProgress());
    for (const project of this._projects()) {
      const weight = project.uiSourceCodes().length;
      const findMatchingFilesInProjectProgress = findMatchingFilesProgress.createSubProgress(weight);
      const filesMathingFileQuery = this._projectFilesMatchingFileQuery(project, searchConfig);
      const promise =
          project
              .findFilesMatchingSearchRequest(searchConfig, filesMathingFileQuery, findMatchingFilesInProjectProgress)
              .then(this._processMatchingFilesForProject.bind(
                  this, this._searchId, project, searchConfig, filesMathingFileQuery));
      promises.push(promise);
    }

    Promise.all(promises).then(this._processMatchingFiles.bind(
        this, this._searchId, searchContentProgress, this._searchFinishedCallback.bind(this, true)));
  }

  /**
   * @param {!Workspace.Project} project
   * @param {!Workspace.ProjectSearchConfig} searchConfig
   * @param {boolean=} dirtyOnly
   * @return {!Array.<string>}
   */
  _projectFilesMatchingFileQuery(project, searchConfig, dirtyOnly) {
    const result = [];
    const uiSourceCodes = project.uiSourceCodes();
    for (let i = 0; i < uiSourceCodes.length; ++i) {
      const uiSourceCode = uiSourceCodes[i];
      if (!uiSourceCode.contentType().isTextType()) {
        continue;
      }
      const binding = Persistence.persistence.binding(uiSourceCode);
      if (binding && binding.network === uiSourceCode) {
        continue;
      }
      if (dirtyOnly && !uiSourceCode.isDirty()) {
        continue;
      }
      if (searchConfig.filePathMatchesFileQuery(uiSourceCode.fullDisplayName())) {
        result.push(uiSourceCode.url());
      }
    }
    result.sort(String.naturalOrderComparator);
    return result;
  }

  /**
   * @param {number} searchId
   * @param {!Workspace.Project} project
   * @param {!Workspace.ProjectSearchConfig} searchConfig
   * @param {!Array<string>} filesMathingFileQuery
   * @param {!Array<string>} files
   */
  _processMatchingFilesForProject(searchId, project, searchConfig, filesMathingFileQuery, files) {
    if (searchId !== this._searchId) {
      this._searchFinishedCallback(false);
      return;
    }

    files.sort(String.naturalOrderComparator);
    files = files.intersectOrdered(filesMathingFileQuery, String.naturalOrderComparator);
    const dirtyFiles = this._projectFilesMatchingFileQuery(project, searchConfig, true);
    files = files.mergeOrdered(dirtyFiles, String.naturalOrderComparator);

    const uiSourceCodes = [];
    for (const file of files) {
      const uiSourceCode = project.uiSourceCodeForURL(file);
      if (!uiSourceCode) {
        continue;
      }
      const script = Bindings.DefaultScriptMapping.scriptForUISourceCode(uiSourceCode);
      if (script && !script.isAnonymousScript()) {
        continue;
      }
      uiSourceCodes.push(uiSourceCode);
    }
    uiSourceCodes.sort(Sources.SourcesSearchScope._filesComparator);
    this._searchResultCandidates =
        this._searchResultCandidates.mergeOrdered(uiSourceCodes, Sources.SourcesSearchScope._filesComparator);
  }

  /**
   * @param {number} searchId
   * @param {!Common.Progress} progress
   * @param {function()} callback
   */
  _processMatchingFiles(searchId, progress, callback) {
    if (searchId !== this._searchId) {
      this._searchFinishedCallback(false);
      return;
    }

    const files = this._searchResultCandidates;
    if (!files.length) {
      progress.done();
      callback();
      return;
    }

    progress.setTotalWork(files.length);

    let fileIndex = 0;
    const maxFileContentRequests = 20;
    let callbacksLeft = 0;

    for (let i = 0; i < maxFileContentRequests && i < files.length; ++i) {
      scheduleSearchInNextFileOrFinish.call(this);
    }

    /**
     * @param {!Workspace.UISourceCode} uiSourceCode
     * @this {Sources.SourcesSearchScope}
     */
    function searchInNextFile(uiSourceCode) {
      if (uiSourceCode.isDirty()) {
        contentLoaded.call(this, uiSourceCode, uiSourceCode.workingCopy());
      } else {
        uiSourceCode.requestContent().then(deferredContent => {
          contentLoaded.call(this, uiSourceCode, deferredContent.content || '');
        });
      }
    }

    /**
     * @this {Sources.SourcesSearchScope}
     */
    function scheduleSearchInNextFileOrFinish() {
      if (fileIndex >= files.length) {
        if (!callbacksLeft) {
          progress.done();
          callback();
          return;
        }
        return;
      }

      ++callbacksLeft;
      const uiSourceCode = files[fileIndex++];
      setTimeout(searchInNextFile.bind(this, uiSourceCode), 0);
    }

    /**
     * @param {!Workspace.UISourceCode} uiSourceCode
     * @param {string} content
     * @this {Sources.SourcesSearchScope}
     */
    function contentLoaded(uiSourceCode, content) {
      /**
       * @param {!Common.ContentProvider.SearchMatch} a
       * @param {!Common.ContentProvider.SearchMatch} b
       */
      function matchesComparator(a, b) {
        return a.lineNumber - b.lineNumber;
      }

      progress.worked(1);
      let matches = [];
      const queries = this._searchConfig.queries();
      if (content !== null) {
        for (let i = 0; i < queries.length; ++i) {
          const nextMatches = Common.ContentProvider.performSearchInContent(
              content, queries[i], !this._searchConfig.ignoreCase(), this._searchConfig.isRegex());
          matches = matches.mergeOrdered(nextMatches, matchesComparator);
        }
      }
      if (matches) {
        const searchResult = new Sources.FileBasedSearchResult(uiSourceCode, matches);
        this._searchResultCallback(searchResult);
      }

      --callbacksLeft;
      scheduleSearchInNextFileOrFinish.call(this);
    }
  }

  /**
   * @override
   */
  stopSearch() {
    ++this._searchId;
  }
};


/**
 * @implements {Search.SearchResult}
 */
Sources.FileBasedSearchResult = class {
  /**
   * @param {!Workspace.UISourceCode} uiSourceCode
   * @param {!Array.<!Common.ContentProvider.SearchMatch>} searchMatches
   */
  constructor(uiSourceCode, searchMatches) {
    this._uiSourceCode = uiSourceCode;
    this._searchMatches = searchMatches;
  }

  /**
   * @override
   * @return {string}
   */
  label() {
    return this._uiSourceCode.displayName();
  }

  /**
   * @override
   * @return {string}
   */
  description() {
    return this._uiSourceCode.fullDisplayName();
  }

  /**
   * @override
   * @return {number}
   */
  matchesCount() {
    return this._searchMatches.length;
  }

  /**
   * @override
   * @param {number} index
   * @return {string}
   */
  matchLineContent(index) {
    return this._searchMatches[index].lineContent;
  }

  /**
   * @override
   * @param {number} index
   * @return {!Object}
   */
  matchRevealable(index) {
    const match = this._searchMatches[index];
    return this._uiSourceCode.uiLocation(match.lineNumber, undefined);
  }

  /**
   * @override
   * @param {number} index
   * @return {?}
   */
  matchLabel(index) {
    return this._searchMatches[index].lineNumber + 1;
  }
};