/*
 * SonarQube
 * Copyright (C) 2009-2024 SonarSource SA
 * mailto:info AT sonarsource DOT com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
import styled from '@emotion/styled';
import classNames from 'classnames';
import { FlagMessage, IssueMessageHighlighting, LineFinding, themeColor } from 'design-system';
import * as React from 'react';
import { FormattedMessage } from 'react-intl';
import { getBranchLikeQuery } from '~sonar-aligned/helpers/branch-like';
import { getSources } from '../../../api/components';
import getCoverageStatus from '../../../components/SourceViewer/helpers/getCoverageStatus';
import { locationsByLine } from '../../../components/SourceViewer/helpers/indexing';
import { translate } from '../../../helpers/l10n';
import { BranchLike } from '../../../types/branch-like';
import { isFile } from '../../../types/component';
import { IssueDeprecatedStatus } from '../../../types/issues';
import {
  Dict,
  Duplication,
  ExpandDirection,
  FlowLocation,
  IssuesByLine,
  Snippet,
  SnippetGroup,
  SourceLine,
  SourceViewerFile,
  Issue as TypeIssue,
} from '../../../types/types';
import { IssueSourceViewerScrollContext } from '../components/IssueSourceViewerScrollContext';
import { IssueSourceViewerHeader } from './IssueSourceViewerHeader';
import SnippetViewer from './SnippetViewer';
import {
  EXPAND_BY_LINES,
  MERGE_DISTANCE,
  createSnippets,
  expandSnippet,
  getPrimaryLocation,
  linesForSnippets,
} from './utils';

interface Props {
  branchLike: BranchLike | undefined;
  duplications?: Duplication[];
  duplicationsByLine?: { [line: number]: number[] };
  highlightedLocationMessage: { index: number; text: string | undefined } | undefined;
  isLastOccurenceOfPrimaryComponent: boolean;
  issue: TypeIssue;
  issuesByLine: IssuesByLine;
  loadDuplications: (component: string, line: SourceLine) => void;
  locations: FlowLocation[];
  onIssueSelect: (issueKey: string) => void;
  onLocationSelect: (index: number) => void;
  renderDuplicationPopup: (
    component: SourceViewerFile,
    index: number,
    line: number,
  ) => React.ReactNode;
  snippetGroup: SnippetGroup;
}

interface State {
  additionalLines: { [line: number]: SourceLine };
  highlightedSymbols: string[];
  loading: boolean;
  snippets: Snippet[];
}

export default class ComponentSourceSnippetGroupViewer extends React.PureComponent<
  Readonly<Props>,
  State
> {
  mounted = false;

  constructor(props: Readonly<Props>) {
    super(props);
    this.state = {
      additionalLines: {},
      highlightedSymbols: [],
      loading: false,
      snippets: [],
    };
  }

  componentDidMount() {
    this.mounted = true;
    this.createSnippetsFromProps();
  }

  componentWillUnmount() {
    this.mounted = false;
  }

  createSnippetsFromProps() {
    const { issue, snippetGroup } = this.props;

    const locations = [...snippetGroup.locations];

    // Add primary location if the component matches
    if (issue.component === snippetGroup.component.key) {
      locations.unshift(getPrimaryLocation(issue));
    }

    const snippets = createSnippets({
      component: snippetGroup.component.key,
      issue,
      locations,
    });

    this.setState({ snippets });
  }

  expandBlock = (snippetIndex: number, direction: ExpandDirection): Promise<void> => {
    const { branchLike, snippetGroup } = this.props;
    const { key } = snippetGroup.component;
    const { snippets } = this.state;
    const snippet = snippets.find((s) => s.index === snippetIndex);
    if (!snippet) {
      return Promise.reject();
    }
    // Extend by EXPAND_BY_LINES and add buffer for merging snippets
    const extension = EXPAND_BY_LINES + MERGE_DISTANCE - 1;
    const range =
      direction === 'up'
        ? {
            from: Math.max(1, snippet.start - extension),
            to: snippet.start - 1,
          }
        : {
            from: snippet.end + 1,
            to: snippet.end + extension,
          };
    return getSources({
      key,
      ...range,
      ...getBranchLikeQuery(branchLike),
    })
      .then((lines) =>
        lines.reduce((lineMap: Dict<SourceLine>, line) => {
          line.coverageStatus = getCoverageStatus(line);
          lineMap[line.line] = line;
          return lineMap;
        }, {}),
      )
      .then((newLinesMapped) => {
        const newSnippets = expandSnippet({
          direction,
          snippetIndex,
          snippets,
        });

        this.setState(({ additionalLines }) => {
          const combinedLines = { ...additionalLines, ...newLinesMapped };
          return {
            additionalLines: combinedLines,
            snippets: newSnippets.filter((s) => !s.toDelete),
          };
        });
      });
  };

  expandComponent = () => {
    const { branchLike, snippetGroup } = this.props;
    const { key } = snippetGroup.component;

    this.setState({ loading: true });

    getSources({ key, ...getBranchLikeQuery(branchLike) }).then(
      (lines) => {
        if (this.mounted) {
          this.setState(({ additionalLines }) => {
            const combinedLines = { ...additionalLines, ...lines };
            return {
              additionalLines: combinedLines,
              loading: false,
              snippets: [{ start: 0, end: lines[lines.length - 1].line, index: -1 }],
            };
          });
        }
      },
      () => {
        if (this.mounted) {
          this.setState({ loading: false });
        }
      },
    );
  };

  handleSymbolClick = (clickedSymbols: string[]) => {
    this.setState(({ highlightedSymbols }) => {
      const newHighlightedSymbols = clickedSymbols.filter(
        (symb) => !highlightedSymbols.includes(symb),
      );
      return { highlightedSymbols: newHighlightedSymbols };
    });
  };

  loadDuplications = (line: SourceLine) => {
    this.props.loadDuplications(this.props.snippetGroup.component.key, line);
  };

  renderDuplicationPopup = (index: number, line: number) => {
    return this.props.renderDuplicationPopup(this.props.snippetGroup.component, index, line);
  };

  renderIssuesList = (line: SourceLine) => {
    const { isLastOccurenceOfPrimaryComponent, issue, issuesByLine, snippetGroup } = this.props;
    const locations =
      issue.component === snippetGroup.component.key && issue.textRange !== undefined
        ? locationsByLine([issue])
        : {};

    const isFlow = issue.secondaryLocations.length === 0;
    const includeIssueLocation = isFlow ? isLastOccurenceOfPrimaryComponent : true;
    const issueLocations = includeIssueLocation ? locations[line.line] : [];
    const issuesForLine = (issuesByLine[line.line] || []).filter(
      (issueForline) =>
        issue.key !== issueForline.key ||
        (issue.key === issueForline.key && issueLocations.length > 0),
    );

    return (
      issuesForLine.length > 0 && (
        <div>
          {issuesForLine.map((issueToDisplay) => {
            const isSelectedIssue = issueToDisplay.key === issue.key;
            return (
              <IssueSourceViewerScrollContext.Consumer key={issueToDisplay.key}>
                {(ctx) => (
                  <LineFinding
                    issueKey={issueToDisplay.key}
                    message={
                      <IssueMessageHighlighting
                        message={issueToDisplay.message}
                        messageFormattings={issueToDisplay.messageFormattings}
                      />
                    }
                    selected={isSelectedIssue}
                    ref={isSelectedIssue ? ctx?.registerPrimaryLocationRef : undefined}
                    onIssueSelect={this.props.onIssueSelect}
                  />
                )}
              </IssueSourceViewerScrollContext.Consumer>
            );
          })}
        </div>
      )
    );
  };

  render() {
    const { isLastOccurenceOfPrimaryComponent, issue, snippetGroup } = this.props;
    const { additionalLines, loading, snippets } = this.state;

    const snippetLines = linesForSnippets(snippets, {
      ...snippetGroup.sources,
      ...additionalLines,
    });

    const issueIsClosed = issue.status === IssueDeprecatedStatus.Closed;
    const issueIsFileLevel = isFile(issue.componentQualifier) && issue.componentEnabled;
    const closedIssueMessageKey = issueIsFileLevel
      ? 'issue.closed.file_level'
      : 'issue.closed.project_level';

    const hideLocationIndex = issue.secondaryLocations.length !== 0;

    return (
      <>
        {issueIsClosed && (
          <FlagMessage className="sw-mb-2 sw-flex" variant="success">
            <div className="sw-block">
              <FormattedMessage
                id={closedIssueMessageKey}
                defaultMessage={translate(closedIssueMessageKey)}
                values={{
                  status: (
                    <strong>
                      {translate('issue.status', issue.status)} (
                      {issue.resolution ? translate('issue.resolution', issue.resolution) : '-'})
                    </strong>
                  ),
                }}
              />
            </div>
          </FlagMessage>
        )}

        <IssueSourceViewerHeader
          className={issueIsClosed && !issueIsFileLevel ? 'sw-mb-0' : ''}
          expandable={isExpandable(snippets, snippetGroup)}
          issueKey={issue.key}
          loading={loading}
          onExpand={this.expandComponent}
          sourceViewerFile={snippetGroup.component}
        />

        {issue.component === snippetGroup.component.key &&
          issue.textRange === undefined &&
          !issueIsClosed && (
            <FileLevelIssueStyle className="sw-py-2">
              <IssueSourceViewerScrollContext.Consumer>
                {(ctx) => (
                  <LineFinding
                    issueKey={issue.key}
                    message={
                      <IssueMessageHighlighting
                        message={issue.message}
                        messageFormattings={issue.messageFormattings}
                      />
                    }
                    selected
                    ref={ctx?.registerPrimaryLocationRef}
                    onIssueSelect={this.props.onIssueSelect}
                    className="sw-m-0 sw-cursor-default"
                  />
                )}
              </IssueSourceViewerScrollContext.Consumer>
            </FileLevelIssueStyle>
          )}

        {snippetLines.map(({ snippet, sourcesMap }, index) => (
          <SnippetViewer
            key={snippets[index].index}
            renderAdditionalChildInLine={this.renderIssuesList}
            component={this.props.snippetGroup.component}
            duplications={this.props.duplications}
            duplicationsByLine={this.props.duplicationsByLine}
            expandBlock={this.expandBlock}
            handleSymbolClick={this.handleSymbolClick}
            highlightedLocationMessage={this.props.highlightedLocationMessage}
            highlightedSymbols={this.state.highlightedSymbols}
            index={snippets[index].index}
            loadDuplications={this.loadDuplications}
            locations={this.props.locations}
            locationsByLine={getLocationsByLine(
              issue,
              snippetGroup,
              isLastOccurenceOfPrimaryComponent,
            )}
            onLocationSelect={this.props.onLocationSelect}
            renderDuplicationPopup={this.renderDuplicationPopup}
            snippet={snippet}
            className={classNames({ 'sw-mt-2': index !== 0 })}
            snippetSourcesMap={sourcesMap}
            hideLocationIndex={hideLocationIndex}
          />
        ))}
      </>
    );
  }
}

function getLocationsByLine(
  issue: TypeIssue,
  snippetGroup: SnippetGroup,
  isLastOccurenceOfPrimaryComponent: boolean,
) {
  const isFlow = issue.secondaryLocations.length === 0;
  const includeIssueLocation = isFlow ? isLastOccurenceOfPrimaryComponent : true;

  return includeIssueLocation &&
    issue.component === snippetGroup.component.key &&
    issue.textRange !== undefined
    ? locationsByLine([issue])
    : {};
}

function isExpandable(snippets: Snippet[], snippetGroup: SnippetGroup) {
  const fullyShown =
    snippets.length === 1 &&
    snippetGroup.component.measures &&
    snippets[0].end - snippets[0].start ===
      parseInt(snippetGroup.component.measures.lines ?? '', 10);

  return !fullyShown && isFile(snippetGroup.component.q);
}

const FileLevelIssueStyle = styled.div`
  border: 1px solid ${themeColor('codeLineBorder')};
`;