import LokiLanguageProvider from '../../../LanguageProvider';
import { LokiDatasource } from '../../../datasource';
import { createLokiDatasource } from '../../../mocks';

import { CompletionDataProvider } from './CompletionDataProvider';
import { getCompletions } from './completions';
import { Label, Situation } from './situation';

jest.mock('../../../querybuilder/operations', () => ({
  explainOperator: () => 'Operator docs',
}));

const history = [
  {
    ts: 12345678,
    query: {
      refId: 'test-1',
      expr: '{test: unit}',
    },
  },
  {
    ts: 87654321,
    query: {
      refId: 'test-1',
      expr: '{test: unit}',
    },
  },
];

const labelNames = ['place', 'source'];
const labelValues = ['moon', 'luna', 'server\\1'];
// Source is duplicated to test handling duplicated labels
const extractedLabelKeys = ['extracted', 'place', 'source'];
const unwrapLabelKeys = ['unwrap', 'labels'];
const otherLabels: Label[] = [
  {
    name: 'place',
    value: 'luna',
    op: '=',
  },
];
const afterSelectorCompletions = [
  {
    documentation: 'Operator docs',
    insertText: '|= "$0"',
    isSnippet: true,
    label: '|= ""',
    type: 'LINE_FILTER',
  },
  {
    documentation: 'Operator docs',
    insertText: '!= "$0"',
    isSnippet: true,
    label: '!= ""',
    type: 'LINE_FILTER',
  },
  {
    documentation: 'Operator docs',
    insertText: '|~ "$0"',
    isSnippet: true,
    label: '|~ ""',
    type: 'LINE_FILTER',
  },
  {
    documentation: 'Operator docs',
    insertText: '!~ "$0"',
    isSnippet: true,
    label: '!~ ""',
    type: 'LINE_FILTER',
  },
  {
    documentation: 'Operator docs',
    insertText: '',
    label: '// Placeholder for the detected parser',
    type: 'DETECTED_PARSER_PLACEHOLDER',
  },
  {
    documentation: 'Operator docs',
    insertText: '',
    label: '// Placeholder for logfmt or json',
    type: 'OPPOSITE_PARSER_PLACEHOLDER',
  },
  {
    documentation: 'Operator docs',
    insertText: '| pattern',
    label: 'pattern',
    type: 'PARSER',
  },
  {
    documentation: 'Operator docs',
    insertText: '| regexp',
    label: 'regexp',
    type: 'PARSER',
  },
  {
    documentation: 'Operator docs',
    insertText: '| unpack',
    label: 'unpack',
    type: 'PARSER',
  },
  {
    insertText: '| unwrap extracted',
    label: 'unwrap extracted',
    type: 'PIPE_OPERATION',
  },
  {
    insertText: '| unwrap place',
    label: 'unwrap place',
    type: 'PIPE_OPERATION',
  },
  {
    insertText: '| unwrap source',
    label: 'unwrap source',
    type: 'PIPE_OPERATION',
  },
  {
    insertText: '| unwrap',
    label: 'unwrap',
    type: 'PIPE_OPERATION',
    documentation: 'Operator docs',
  },
  {
    insertText: '| line_format "{{.$0}}"',
    isSnippet: true,
    label: 'line_format',
    type: 'PIPE_OPERATION',
    documentation: 'Operator docs',
  },
  {
    insertText: '| label_format',
    isSnippet: true,
    label: 'label_format',
    type: 'PIPE_OPERATION',
    documentation: 'Operator docs',
  },
];

function buildAfterSelectorCompletions(
  detectedParser: string,
  otherParser: string,
  afterPipe: boolean,
  hasSpace: boolean
) {
  const explanation = '(detected)';
  let expectedCompletions = afterSelectorCompletions.map((completion) => {
    if (completion.type === 'DETECTED_PARSER_PLACEHOLDER') {
      return {
        ...completion,
        type: 'PARSER',
        label: `${detectedParser} ${explanation}`,
        insertText: `| ${detectedParser}`,
      };
    } else if (completion.type === 'OPPOSITE_PARSER_PLACEHOLDER') {
      return {
        ...completion,
        type: 'PARSER',
        label: otherParser,
        insertText: `| ${otherParser}`,
      };
    }

    return { ...completion };
  });

  if (afterPipe) {
    // Remove pipe
    expectedCompletions = expectedCompletions
      .map((completion) => {
        completion.insertText = completion.insertText.replace('|', '').trimStart();
        return completion;
      })
      // Remove != and !~
      .filter((completion) => !completion.insertText.startsWith('!'))
      .filter((completion) => (hasSpace ? completion.type !== 'LINE_FILTER' : true));
  }

  expectedCompletions.forEach((completion) => {
    if (completion.type !== 'LINE_FILTER') {
      completion.insertText = hasSpace ? completion.insertText.trimStart() : ` ${completion.insertText}`;
    }
  });

  return expectedCompletions;
}

describe('getCompletions', () => {
  let completionProvider: CompletionDataProvider, languageProvider: LokiLanguageProvider, datasource: LokiDatasource;
  beforeEach(() => {
    datasource = createLokiDatasource();
    languageProvider = new LokiLanguageProvider(datasource);
    completionProvider = new CompletionDataProvider(languageProvider, {
      current: history,
    });

    jest.spyOn(completionProvider, 'getLabelNames').mockResolvedValue(labelNames);
    jest.spyOn(completionProvider, 'getLabelValues').mockResolvedValue(labelValues);
    jest.spyOn(completionProvider, 'getParserAndLabelKeys').mockResolvedValue({
      extractedLabelKeys,
      unwrapLabelKeys,
      hasJSON: false,
      hasLogfmt: false,
    });
  });

  test.each(['EMPTY', 'AT_ROOT'])(`Returns completion options when the situation is %s`, async (type) => {
    const situation = { type } as Situation;
    const completions = await getCompletions(situation, completionProvider);

    expect(completions).toHaveLength(24);
  });

  test('Returns completion options when the situation is IN_RANGE', async () => {
    const situation: Situation = { type: 'IN_RANGE' };
    const completions = await getCompletions(situation, completionProvider);

    expect(completions).toEqual([
      { insertText: '$__interval', label: '$__interval', type: 'DURATION' },
      { insertText: '$__range', label: '$__range', type: 'DURATION' },
      { insertText: '1m', label: '1m', type: 'DURATION' },
      { insertText: '5m', label: '5m', type: 'DURATION' },
      { insertText: '10m', label: '10m', type: 'DURATION' },
      { insertText: '30m', label: '30m', type: 'DURATION' },
      { insertText: '1h', label: '1h', type: 'DURATION' },
      { insertText: '1d', label: '1d', type: 'DURATION' },
    ]);
  });

  test('Returns completion options when the situation is IN_GROUPING', async () => {
    const situation: Situation = { type: 'IN_GROUPING', logQuery: '' };
    const completions = await getCompletions(situation, completionProvider);

    expect(completions).toEqual([
      {
        insertText: 'extracted',
        label: 'extracted',
        triggerOnInsert: false,
        type: 'LABEL_NAME',
      },
      {
        insertText: 'place',
        label: 'place',
        triggerOnInsert: false,
        type: 'LABEL_NAME',
      },
      {
        insertText: 'source',
        label: 'source',
        triggerOnInsert: false,
        type: 'LABEL_NAME',
      },
    ]);
  });

  test('Returns completion options when the situation is IN_LABEL_SELECTOR_NO_LABEL_NAME', async () => {
    const situation: Situation = { type: 'IN_LABEL_SELECTOR_NO_LABEL_NAME', otherLabels };
    const completions = await getCompletions(situation, completionProvider);

    expect(completions).toEqual([
      {
        insertText: 'place=',
        label: 'place',
        triggerOnInsert: true,
        type: 'LABEL_NAME',
      },
      {
        insertText: 'source=',
        label: 'source',
        triggerOnInsert: true,
        type: 'LABEL_NAME',
      },
    ]);
  });

  test('Returns completion options when the situation is IN_LABEL_SELECTOR_WITH_LABEL_NAME', async () => {
    const situation: Situation = {
      type: 'IN_LABEL_SELECTOR_WITH_LABEL_NAME',
      otherLabels,
      labelName: '',
      betweenQuotes: false,
    };
    let completions = await getCompletions(situation, completionProvider);

    expect(completions).toEqual([
      {
        insertText: '"moon"',
        label: 'moon',
        type: 'LABEL_VALUE',
      },
      {
        insertText: '"luna"',
        label: 'luna',
        type: 'LABEL_VALUE',
      },
      {
        insertText: '"server\\\\1"',
        label: 'server\\1',
        type: 'LABEL_VALUE',
      },
    ]);

    completions = await getCompletions({ ...situation, betweenQuotes: true }, completionProvider);

    expect(completions).toEqual([
      {
        insertText: 'moon',
        label: 'moon',
        type: 'LABEL_VALUE',
      },
      {
        insertText: 'luna',
        label: 'luna',
        type: 'LABEL_VALUE',
      },
      {
        insertText: 'server\\\\1',
        label: 'server\\1',
        type: 'LABEL_VALUE',
      },
    ]);
  });

  test.each([
    [true, true],
    [false, true],
    [true, false],
    [false, false],
  ])(
    'Returns completion options when the situation is AFTER_SELECTOR, detected JSON parser, afterPipe %s, and hasSpace: %s',
    async (afterPipe: boolean, hasSpace: boolean) => {
      jest.spyOn(completionProvider, 'getParserAndLabelKeys').mockResolvedValue({
        extractedLabelKeys,
        unwrapLabelKeys,
        hasJSON: true,
        hasLogfmt: false,
      });
      const situation: Situation = { type: 'AFTER_SELECTOR', logQuery: '', afterPipe, hasSpace };
      const completions = await getCompletions(situation, completionProvider);

      const expected = buildAfterSelectorCompletions('json', 'logfmt', afterPipe, hasSpace);
      expect(completions).toEqual(expected);
    }
  );

  test.each([true, false])(
    'Returns completion options when the situation is AFTER_SELECTOR, detected Logfmt parser, afterPipe %s, and hasSpace: %s',
    async (afterPipe: boolean) => {
      jest.spyOn(completionProvider, 'getParserAndLabelKeys').mockResolvedValue({
        extractedLabelKeys,
        unwrapLabelKeys,
        hasJSON: false,
        hasLogfmt: true,
      });
      const situation: Situation = { type: 'AFTER_SELECTOR', logQuery: '', afterPipe, hasSpace: true };
      const completions = await getCompletions(situation, completionProvider);

      const expected = buildAfterSelectorCompletions('logfmt', 'json', afterPipe, true);
      expect(completions).toEqual(expected);
    }
  );

  test('Returns completion options when the situation is IN_AGGREGATION', async () => {
    const situation: Situation = { type: 'IN_AGGREGATION' };
    const completions = await getCompletions(situation, completionProvider);

    expect(completions).toHaveLength(22);
  });

  test('Returns completion options when the situation is AFTER_UNWRAP', async () => {
    const situation: Situation = { type: 'AFTER_UNWRAP', logQuery: '' };
    const completions = await getCompletions(situation, completionProvider);

    const extractedCompletions = completions.filter((completion) => completion.type === 'LABEL_NAME');
    const functionCompletions = completions.filter((completion) => completion.type === 'FUNCTION');

    expect(extractedCompletions).toEqual([
      {
        insertText: 'unwrap',
        label: 'unwrap',
        triggerOnInsert: false,
        type: 'LABEL_NAME',
      },
      {
        insertText: 'labels',
        label: 'labels',
        triggerOnInsert: false,
        type: 'LABEL_NAME',
      },
    ]);
    expect(functionCompletions).toHaveLength(3);
  });
});
