import {
  Button,
  Center,
  Modal,
  Space,
  Stepper,
  Title,
  Text,
  Flex,
  Select,
  Textarea,
} from "@mantine/core";
import { useEffect, useState } from "react";
import "./NewMolecule.css";
import {
  IconArchiveFilled,
  IconArticleFilled,
  IconFileFilled,
} from "@tabler/icons-react";
import {
  ConvertMoleculeToStandart,
  GetInFormats,
} from "Api/ConvertBackendCalls";
import { AxiosError } from "axios";
import CustomButton from "Components/CustomButton/CustomButton";

interface NewMoleculeModalProps {
  isOpened: boolean;
  setIsOpened: (opened: boolean) => void;
}

export function NewMoleculeModal(props: NewMoleculeModalProps) {
  const [activeStep, setActiveStep] = useState(0);
  const [selectedMethod, setSelectedMethod] = useState(0);

  const [inMolecule, setInMolecule] = useState("");
  const [inFormat, setInFormat] = useState<string | null>();

  const [inOptions, setInOptions] = useState<string[] | undefined>();

  const getOptions = () => {
    GetInFormats().then((data: { [key: string]: string } | AxiosError) => {
      if (data instanceof AxiosError) {
        //TODO: handle Error
      } else {
        const values = Object.keys(data);
        setInOptions(values);
      }
    });
  };

  useEffect(() => {
    getOptions();
  }, []);

  //reset on open dialog
  useEffect(() => {
    if (props.isOpened) {
      setActiveStep(0);
      setSelectedMethod(0);
      setInMolecule("");
      setInFormat(undefined);
      if (inOptions == undefined) {
        getOptions();
      }
    }
  }, [props.isOpened]);

  const handleClose = () => {
    props.setIsOpened(false);
  };

  const handleConvert = () => {
    if (inFormat) {
      ConvertMoleculeToStandart({
        inputText: inMolecule,
        inputFormat: inFormat,
        make_3d: true,
        add_h: false,
        optimize: false,
      }).then((data: string | AxiosError) => {
        if (data instanceof AxiosError) {
          //TODO: handle Error
        } else {
          setCurrentMoleculeString(data);
          props.setIsOpened(false);
        }
      });
    } else {
      //TODO: add no format selected handling
    }
  };

  const handleEmptyMolecule = () => {
    props.setIsOpened(false);
  };

  return (
    <Modal
      opened={props.isOpened}
      onClose={handleClose}
      title=<Title size="xl">Новая молекула</Title>
      centered
      size="75%"
      styles={{
        content: { paddingLeft: "10px" },
        title: { width: "100%" },
      }}
    >
      <Stepper
        active={activeStep}
        onStepClick={setActiveStep}
        allowNextStepsSelect={false}
        classNames={{ root: "StepperRoot" }}
        styles={{
          steps: {
            paddingTop: "30px",
            paddingBottom: "30px",
            paddingLeft: "20px",
            minWidth: "0px",
            alignSelf: "center",
          },
          content: {
            flex: 1,
          },
        }}
        style={{ display: "flex", flexDirection: "row" }}
        orientation="vertical"
      >
        <Stepper.Step>
          <div style={{ width: "100%", textAlign: "center" }}>
            <Title size="lg">Шаг 1: Способ добавления молекулы</Title>
            <Space h="lg" />
            <Flex justify="center" gap="md" wrap="wrap">
              <Button
                onClick={() => {
                  setSelectedMethod(1);
                  handleEmptyMolecule();
                }}
                style={{ height: "100px", flexGrow: "1" }}
                size="lg"
              >
                <Flex direction="row" gap="lg">
                  <IconFileFilled size={40} />
                  <Center>
                    <Text>Пустая молекула</Text>
                  </Center>
                </Flex>
              </Button>
              <Button
                onClick={() => {
                  setSelectedMethod(2);
                  setActiveStep(1);
                }}
                style={{ height: "100px", flexGrow: "1" }}
              >
                <Flex direction="row" gap="lg">
                  <IconArchiveFilled size="40" />
                  <Center>
                    <Text>Из файла / Архива</Text>
                  </Center>
                </Flex>
              </Button>
              <Button
                onClick={() => {
                  setSelectedMethod(3);
                  setActiveStep(1);
                }}
                style={{ height: "100px", flexGrow: "1" }}
              >
                <Flex direction="row" gap="lg">
                  <IconArticleFilled size={40} />
                  <Center>
                    <Text>Другой формат</Text>
                  </Center>
                </Flex>
              </Button>
            </Flex>
          </div>
        </Stepper.Step>
        <Stepper.Step>
          <div style={{ width: "100%", textAlign: "center" }}>
            {selectedMethod == 2 && (
              <div>
                <Title size="lg">Шаг 2: Выбор файла</Title>
                <Space h="lg" />
              </div>
            )}
            {selectedMethod == 3 && (
              <div>
                <Title size="md">Шаг 2: Ввод молекулы</Title>
                <Space h="lg" />
                <Textarea
                  className="moleculeInput"
                  value={inMolecule}
                  onChange={(e) => setInMolecule(e.currentTarget.value)}
                  placeholder="Введите текст молекулы"
                  classNames={{
                    wrapper: "moleculeInputWrapper",
                  }}
                  onKeyDown={(e) => {
                    // Stop arrow keys from reaching react-resizable-panels
                    if (
                      [
                        "ArrowUp",
                        "ArrowDown",
                        "ArrowLeft",
                        "ArrowRight",
                      ].includes(e.key)
                    ) {
                      e.stopPropagation();
                    }
                  }}
                />
                <Space h="md" />
                <Select
                  value={inFormat}
                  onChange={(value: string | null) => setInFormat(value)}
                  searchable
                  data={inOptions}
                  placeholder="Выберите формат"
                  classNames={{
                    input: "selectInFormat",
                    dropdown: "selectDropDown",
                    option: "selectDropDownOption",
                  }}
                />
                <Space h="md" />
                <CustomButton
                  color="accent"
                  onClick={handleConvert}
                  text="Преобразовать"
                />
              </div>
            )}
          </div>
        </Stepper.Step>
      </Stepper>
    </Modal>
  );
}