import { Checkbox, DirectionalHint, Link, Stack, Text, TextField, TooltipHost } from "@fluentui/react";
import { useDatabases } from "Explorer/useDatabases";
import React, { FunctionComponent, useEffect, useState } from "react";
import * as Constants from "../../../Common/Constants";
import { InfoTooltip } from "../../../Common/Tooltip/InfoTooltip";
import * as SharedConstants from "../../../Shared/Constants";
import { userContext } from "../../../UserContext";
import { getCollectionName } from "../../../Utils/APITypeUtils";
import * as AutoPilotUtils from "../../../Utils/AutoPilotUtils";
import * as PricingUtils from "../../../Utils/PricingUtils";
import { CostEstimateText } from "./CostEstimateText/CostEstimateText";
import "./ThroughputInput.less";

export interface ThroughputInputProps {
  isDatabase: boolean;
  isSharded: boolean;
  showFreeTierExceedThroughputTooltip: boolean;
  setThroughputValue: (throughput: number) => void;
  setIsAutoscale: (isAutoscale: boolean) => void;
  setIsThroughputCapExceeded: (isThroughputCapExceeded: boolean) => void;
  onCostAcknowledgeChange: (isAcknowledged: boolean) => void;
}

export const ThroughputInput: FunctionComponent<ThroughputInputProps> = ({
  isDatabase,
  showFreeTierExceedThroughputTooltip,
  setThroughputValue,
  setIsAutoscale,
  setIsThroughputCapExceeded,
  isSharded,
  onCostAcknowledgeChange,
}: ThroughputInputProps) => {
  const [isAutoscaleSelected, setIsAutoScaleSelected] = useState<boolean>(true);
  const [throughput, setThroughput] = useState<number>(AutoPilotUtils.minAutoPilotThroughput);
  const [isCostAcknowledged, setIsCostAcknowledged] = useState<boolean>(false);
  const [throughputError, setThroughputError] = useState<string>("");
  const [totalThroughputUsed, setTotalThroughputUsed] = useState<number>(0);

  setIsAutoscale(isAutoscaleSelected);
  setThroughputValue(throughput);

  const throughputCap = userContext.databaseAccount?.properties.capacity?.totalThroughputLimit;

  useEffect(() => {
    // throughput cap check for the initial state
    let totalThroughput = 0;
    (useDatabases.getState().databases || []).forEach((database) => {
      if (database.offer()) {
        const dbThroughput = database.offer().autoscaleMaxThroughput || database.offer().manualThroughput;
        totalThroughput += dbThroughput;
      }

      (database.collections() || []).forEach((collection) => {
        if (collection.offer()) {
          const colThroughput = collection.offer().autoscaleMaxThroughput || collection.offer().manualThroughput;
          totalThroughput += colThroughput;
        }
      });
    });
    setTotalThroughputUsed(totalThroughput);

    if (throughputCap && throughputCap - totalThroughput < throughput) {
      setThroughputError(
        `Your account is currently configured with a total throughput limit of ${throughputCap} RU/s. This update isn't possible because it would increase the total throughput to ${
          totalThroughputUsed + throughput
        } RU/s. Change total throughput limit in cost management.`
      );

      setIsThroughputCapExceeded(true);
    }
  }, []);

  const checkThroughputCap = (newThroughput: number): boolean => {
    if (throughputCap && throughputCap - totalThroughputUsed < newThroughput) {
      setThroughputError(
        `Your account is currently configured with a total throughput limit of ${throughputCap} RU/s. This update isn't possible because it would increase the total throughput to ${
          totalThroughputUsed + newThroughput
        } RU/s. Change total throughput limit in cost management.`
      );
      setIsThroughputCapExceeded(true);
      return false;
    }

    setThroughputError("");
    setIsThroughputCapExceeded(false);
    return true;
  };

  const getThroughputLabelText = (): string => {
    let throughputHeaderText: string;
    if (isAutoscaleSelected) {
      throughputHeaderText = AutoPilotUtils.getAutoPilotHeaderText().toLocaleLowerCase();
    } else {
      const minRU: string = SharedConstants.CollectionCreation.DefaultCollectionRUs400.toLocaleString();

      let maxRU: string;
      if (userContext.isTryCosmosDBSubscription) {
        maxRU = Constants.TryCosmosExperience.maxRU.toLocaleString();
      } else if (!isSharded) {
        maxRU = "10000";
      } else {
        maxRU = "unlimited";
      }

      throughputHeaderText = `throughput (${minRU} - ${maxRU} RU/s)`;
    }
    return `${isDatabase ? "Database" : getCollectionName()} ${throughputHeaderText}`;
  };

  const onThroughputValueChange = (newInput: string): void => {
    const newThroughput = parseInt(newInput);
    setThroughput(newThroughput);
    setThroughputValue(newThroughput);

    if (!isSharded && newThroughput > 10000) {
      setThroughputError("Unsharded collections support up to 10,000 RUs");
      return;
    }

    if (!checkThroughputCap(newThroughput)) {
      return;
    }

    setThroughputError("");
  };

  const getAutoScaleTooltip = (): string => {
    const collectionName = getCollectionName().toLocaleLowerCase();
    return `Set the max RU/s to the highest RU/s you want your ${collectionName} to scale to. The ${collectionName} will scale between 10% of max RU/s to the max RU/s based on usage.`;
  };

  const getCostAcknowledgeText = (): string => {
    const databaseAccount = userContext.databaseAccount;
    if (!databaseAccount || !databaseAccount.properties) {
      return "";
    }

    const numberOfRegions: number = databaseAccount.properties.readLocations?.length || 1;
    const multimasterEnabled: boolean = databaseAccount.properties.enableMultipleWriteLocations;

    return PricingUtils.getEstimatedSpendAcknowledgeString(
      throughput,
      userContext.portalEnv,
      numberOfRegions,
      multimasterEnabled,
      isAutoscaleSelected
    );
  };

  const handleOnChangeMode = (event: React.ChangeEvent<HTMLInputElement>, mode: string): void => {
    if (mode === "Autoscale") {
      setThroughput(AutoPilotUtils.minAutoPilotThroughput);
      setIsAutoScaleSelected(true);
      setThroughputValue(AutoPilotUtils.minAutoPilotThroughput);
      setIsAutoscale(true);
      checkThroughputCap(AutoPilotUtils.minAutoPilotThroughput);
    } else {
      setThroughput(SharedConstants.CollectionCreation.DefaultCollectionRUs400);
      setIsAutoScaleSelected(false);
      setThroughputValue(SharedConstants.CollectionCreation.DefaultCollectionRUs400);
      setIsAutoscale(false);
      checkThroughputCap(SharedConstants.CollectionCreation.DefaultCollectionRUs400);
    }
  };

  return (
    <div className="throughputInputContainer throughputInputSpacing">
      <Stack horizontal>
        <span className="mandatoryStar">*&nbsp;</span>
        <Text aria-label="Throughput header" variant="small" style={{ lineHeight: "20px", fontWeight: 600 }}>
          {getThroughputLabelText()}
        </Text>
        <InfoTooltip>{PricingUtils.getRuToolTipText()}</InfoTooltip>
      </Stack>

      <Stack horizontal verticalAlign="center">
        <input
          className="throughputInputRadioBtn"
          aria-label="Autoscale mode"
          aria-required={true}
          checked={isAutoscaleSelected}
          type="radio"
          role="radio"
          tabIndex={0}
          onChange={(e) => handleOnChangeMode(e, "Autoscale")}
        />
        <span className="throughputInputRadioBtnLabel">Autoscale</span>

        <input
          className="throughputInputRadioBtn"
          aria-label="Manual mode"
          checked={!isAutoscaleSelected}
          type="radio"
          aria-required={true}
          role="radio"
          tabIndex={0}
          onChange={(e) => handleOnChangeMode(e, "Manual")}
        />
        <span className="throughputInputRadioBtnLabel">Manual</span>
      </Stack>

      {isAutoscaleSelected && (
        <Stack className="throughputInputSpacing">
          <Text variant="small" aria-label="ruDescription">
            Estimate your required RU/s with{" "}
            <Link target="_blank" href="https://cosmos.azure.com/capacitycalculator/" aria-label="ruDescription">
              capacity calculator
            </Link>
            .
          </Text>

          <Stack horizontal>
            <Text variant="small" style={{ lineHeight: "20px", fontWeight: 600 }} aria-label="maxRUDescription">
              {isDatabase ? "Database" : getCollectionName()} Max RU/s
            </Text>
            <InfoTooltip>{getAutoScaleTooltip()}</InfoTooltip>
          </Stack>

          <TextField
            type="number"
            styles={{
              fieldGroup: { width: 300, height: 27 },
              field: { fontSize: 12 },
            }}
            onChange={(event, newInput?: string) => onThroughputValueChange(newInput)}
            step={AutoPilotUtils.autoPilotIncrementStep}
            min={AutoPilotUtils.minAutoPilotThroughput}
            value={throughput.toString()}
            aria-label="Max request units per second"
            required={true}
            errorMessage={throughputError}
          />

          <Text variant="small">
            Your {isDatabase ? "database" : getCollectionName().toLocaleLowerCase()} throughput will automatically scale
            from{" "}
            <b>
              {AutoPilotUtils.getMinRUsBasedOnUserInput(throughput)} RU/s (10% of max RU/s) - {throughput} RU/s
            </b>{" "}
            based on usage.
          </Text>
        </Stack>
      )}

      {!isAutoscaleSelected && (
        <Stack className="throughputInputSpacing">
          <Text variant="small" aria-label="ruDescription">
            Estimate your required RU/s with&nbsp;
            <Link target="_blank" href="https://cosmos.azure.com/capacitycalculator/" aria-label="capacityLink">
              capacity calculator
            </Link>
            .
          </Text>

          <TooltipHost
            directionalHint={DirectionalHint.topLeftEdge}
            content={
              showFreeTierExceedThroughputTooltip && throughput > SharedConstants.FreeTierLimits.RU
                ? `The first ${SharedConstants.FreeTierLimits.RU} RU/s in this account are free. Billing will apply to any throughput beyond ${SharedConstants.FreeTierLimits.RU} RU/s.`
                : undefined
            }
          >
            <TextField
              type="number"
              styles={{
                fieldGroup: { width: 300, height: 27 },
                field: { fontSize: 12 },
              }}
              onChange={(event, newInput?: string) => onThroughputValueChange(newInput)}
              step={100}
              min={SharedConstants.CollectionCreation.DefaultCollectionRUs400}
              max={userContext.isTryCosmosDBSubscription ? Constants.TryCosmosExperience.maxRU : Infinity}
              value={throughput.toString()}
              aria-label="Max request units per second"
              required={true}
              errorMessage={throughputError}
            />
          </TooltipHost>
        </Stack>
      )}

      <CostEstimateText requestUnits={throughput} isAutoscale={isAutoscaleSelected} />

      {throughput > SharedConstants.CollectionCreation.DefaultCollectionRUs100K && (
        <Stack horizontal verticalAlign="start">
          <Checkbox
            checked={isCostAcknowledged}
            styles={{
              checkbox: { width: 12, height: 12 },
              label: { padding: 0, margin: "4px 4px 0 0" },
            }}
            onChange={(ev: React.FormEvent<HTMLElement>, isChecked: boolean) => {
              setIsCostAcknowledged(isChecked);
              onCostAcknowledgeChange(isChecked);
            }}
          />
          <Text variant="small" style={{ lineHeight: "20px" }}>
            {getCostAcknowledgeText()}
          </Text>
        </Stack>
      )}
    </div>
  );
};