import { mapPanelToViewModel, normalizeQueryResponseData } from '~/monitoring/stores/utils';
import { panelTypes, metricStates } from '~/monitoring/constants';

const initTime = 1435781451.781;

const makeValue = val => [initTime, val];
const makeValues = vals => vals.map((val, i) => [initTime + 15 * i, val]);

// Normalized Prometheus Responses

const scalarResult = ({ value = '1' } = {}) =>
  normalizeQueryResponseData({
    resultType: 'scalar',
    result: makeValue(value),
  });

const vectorResult = ({ value1 = '1', value2 = '2' } = {}) =>
  normalizeQueryResponseData({
    resultType: 'vector',
    result: [
      {
        metric: {
          __name__: 'up',
          job: 'prometheus',
          instance: 'localhost:9090',
        },
        value: makeValue(value1),
      },
      {
        metric: {
          __name__: 'up',
          job: 'node',
          instance: 'localhost:9100',
        },
        value: makeValue(value2),
      },
    ],
  });

const matrixSingleResult = ({ values = ['1', '2', '3'] } = {}) =>
  normalizeQueryResponseData({
    resultType: 'matrix',
    result: [
      {
        metric: {},
        values: makeValues(values),
      },
    ],
  });

const matrixMultiResult = ({ values1 = ['1', '2', '3'], values2 = ['4', '5', '6'] } = {}) =>
  normalizeQueryResponseData({
    resultType: 'matrix',
    result: [
      {
        metric: {
          __name__: 'up',
          job: 'prometheus',
          instance: 'localhost:9090',
        },
        values: makeValues(values1),
      },
      {
        metric: {
          __name__: 'up',
          job: 'node',
          instance: 'localhost:9091',
        },
        values: makeValues(values2),
      },
    ],
  });

// GraphData factory

/**
 * Generate mock graph data according to options
 *
 * @param {Object} panelOptions - Panel options as in YML.
 * @param {Object} dataOptions
 * @param {Object} dataOptions.metricCount
 * @param {Object} dataOptions.isMultiSeries
 */
export const timeSeriesGraphData = (panelOptions = {}, dataOptions = {}) => {
  const { metricCount = 1, isMultiSeries = false } = dataOptions;

  return mapPanelToViewModel({
    title: 'Time Series Panel',
    type: panelTypes.LINE_CHART,
    x_label: 'X Axis',
    y_label: 'Y Axis',
    metrics: Array.from(Array(metricCount), (_, i) => ({
      label: `Metric ${i + 1}`,
      state: metricStates.OK,
      result: isMultiSeries ? matrixMultiResult() : matrixSingleResult(),
    })),
    ...panelOptions,
  });
};

/**
 * Generate mock graph data according to options
 *
 * @param {Object} panelOptions - Panel options as in YML.
 * @param {Object} dataOptions
 * @param {Object} dataOptions.unit
 * @param {Object} dataOptions.value
 * @param {Object} dataOptions.isVector
 */
export const singleStatGraphData = (panelOptions = {}, dataOptions = {}) => {
  const { unit, value = '1', isVector = false } = dataOptions;

  return mapPanelToViewModel({
    title: 'Single Stat Panel',
    type: panelTypes.SINGLE_STAT,
    metrics: [
      {
        label: 'Metric Label',
        state: metricStates.OK,
        result: isVector ? vectorResult({ value }) : scalarResult({ value }),
        unit,
      },
    ],
    ...panelOptions,
  });
};

/**
 * Generate mock graph data according to options
 *
 * @param {Object} panelOptions - Panel options as in YML.
 * @param {Object} dataOptions
 * @param {Array} dataOptions.values - Metric values
 * @param {Array} dataOptions.upper - Upper boundary values
 * @param {Array} dataOptions.lower - Lower boundary values
 */
export const anomalyGraphData = (panelOptions = {}, dataOptions = {}) => {
  const { values, upper, lower } = dataOptions;

  return mapPanelToViewModel({
    title: 'Anomaly Panel',
    type: panelTypes.ANOMALY_CHART,
    x_label: 'X Axis',
    y_label: 'Y Axis',
    metrics: [
      {
        label: `Metric`,
        state: metricStates.OK,
        result: matrixSingleResult({ values }),
      },
      {
        label: `Upper boundary`,
        state: metricStates.OK,
        result: matrixSingleResult({ values: upper }),
      },
      {
        label: `Lower boundary`,
        state: metricStates.OK,
        result: matrixSingleResult({ values: lower }),
      },
    ],
    ...panelOptions,
  });
};