import { licenseValidLength } from "@/constants";
import { useLicenseCodeStore } from "@/hooks/use_license_code_store";
import { useProductsStore } from "@/hooks/use_products_store";
import type { LicenseInfoForm } from "@/types";
import { Button, Flex, Group, Paper, Select, TextInput, Title } from "@mantine/core";
import { useForm } from "@mantine/form";
import { notifications } from "@mantine/notifications";
import { IconAt, IconCalendar, IconTag, IconUser } from "@tabler/icons-react";
import dayjs from "dayjs";
import { find, isEmpty, pluck, prop, propEq } from "ramda";
import { useCallback } from "react";

export function LicenseForm() {
  const form = useForm<LicenseInfoForm>({
    initialValues: {
      licenseName: "",
      assigneeName: "",
      assigneeEmail: "",
      validLength: licenseValidLength[0].label,
    },
    validate: {
      licenseName: (value) => (isEmpty(value) ? "授权名称不能为空" : null),
      assigneeName: (value) => (isEmpty(value) ? "被授权人不能为空" : null),
    },
  });
  const selectedProducts = useProductsStore((state) => state.selectedProducts);
  const updateLicenseCode = useLicenseCodeStore((state) => state.setLicenseCode);
  const licenseGenAction = useCallback(
    async (formValue: LicenseInfoForm) => {
      const license = await generateLicense(formValue, selectedProducts);
      updateLicenseCode(license);
    },
    [selectedProducts, updateLicenseCode]
  );

  return (
    <Paper shadow="md" p="lg">
      <form onSubmit={form.onSubmit(licenseGenAction)}>
        <Flex direction="column" gap="md">
          <Title order={4}>授权信息</Title>
          <TextInput
            label="授权名称"
            placeholder="请输入授权名称"
            withAsterisk
            leftSection={<IconTag size={16} />}
            {...form.getInputProps("licenseName")}
          />
          <TextInput
            label="被授权人"
            placeholder="请输入授权人名称"
            withAsterisk
            leftSection={<IconUser size={16} />}
            {...form.getInputProps("assigneeName")}
          />
          <TextInput
            label="被授权人Email"
            placeholder="请输入授权人Email"
            leftSection={<IconAt size={16} />}
            {...form.getInputProps("assigneeEmail")}
          />
          <Select
            label="授权有效时长"
            placeholder="请选择授权有效时长"
            data={pluck("label", licenseValidLength)}
            leftSection={<IconCalendar size={16} />}
            {...form.getInputProps("validLength")}
          />
          <Group justify="flex-end">
            <Button type="submit">生成授权</Button>
          </Group>
        </Flex>
      </form>
    </Paper>
  );
}

async function generateLicense(form: LicenseInfoForm, selectedProducts: string[]) {
  const validYears = find(propEq(form.validLength, "label"), licenseValidLength)?.value ?? 0;
  const now = dayjs();
  const validDays = now.add(validYears, "year").diff(now, "day");
  if (isEmpty(selectedProducts)) {
    notifications.show({
      title: "至少需要选择一个产品",
      color: "red",
    });
    return "";
  }
  const requestBody = {
    licenseeName: form.licenseName,
    assigneeName: form.assigneeName,
    assigneeEmail: form.assigneeEmail,
    validDays,
    requestProducts: selectedProducts,
  };
  const response = await fetch("/api/license", {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
    },
    body: JSON.stringify(requestBody),
  });
  const data = await response.json();
  return prop<"license", { license: string }>("license", data);
}