"use client";

import { useCallback, useMemo, useState } from "react";
import { range } from "fp-ts/NonEmptyArray";
import * as t from "io-ts";

import { toolGroups } from "@/config/tools";
import { uuid } from "@/lib/uuid";
import { useScrollFollow } from "@/hooks/useScrollFollow";
import { Button } from "@/components/ui/button";
import { Input, InputProps } from "@/components/ui/input";
import {
  Select,
  SelectContent,
  SelectItem,
  SelectProps,
  SelectTrigger,
  SelectValue,
} from "@/components/ui/select";
import { Textarea } from "@/components/ui/textarea";
import { ClearButton } from "@/components/buttons/clear";
import { CopyButton } from "@/components/buttons/copy";
import { Configuration } from "@/components/configuration";
import { Configurations } from "@/components/configurations";
import { ControlMenu } from "@/components/control-menu";
import { icons } from "@/components/icons";
import { LabeledSwitch } from "@/components/labeled-switch";
import { PageRootSection } from "@/components/page-root-section";
import { PageSection } from "@/components/page-section";

const v1 = "1";
const v4 = "4";

const uuidVersions = t.keyof({ [v1]: null, [v4]: null });
type UuidVersion = t.TypeOf<typeof uuidVersions>;

export default function Page() {
  const [hyphens, setHyphens] = useState(true);
  const [uppercase, setUppercase] = useState(false);
  const [uuidVersion, setUuidVersion] = useState<UuidVersion>("4");
  const [generates, setGenerates] = useState(1);
  const [uuids, setUuids] = useState<string[]>([]);
  const ref = useScrollFollow<HTMLTextAreaElement>([uuids]);

  const uuidsString = uuids.join("\n");

  const clearUuids = useCallback(() => setUuids([]), []);

  const onUuidVersionChange: SelectProps["onValueChange"] = value => {
    if (uuidVersions.is(value)) {
      setUuidVersion(value);
    }
  };

  const onGeneratesChange: InputProps["onChange"] = ({ currentTarget: { value } }) => {
    const newGenerates = Number(value);

    if (newGenerates >= 1 && newGenerates <= 1000) {
      setGenerates(newGenerates);
    }
  };

  const onGenerateClick = () => {
    const newUuids = range(1, generates).map(_ => uuid(uuidVersion, hyphens, uppercase));
    setUuids([...uuids, ...newUuids]);
  };

  const hyphensConfig = useMemo(
    () => (
      <Configuration
        icon={<icons.Minus size={24} />}
        title="Hyphens"
        control={
          <LabeledSwitch
            id="hyphens-switch"
            label={hyphens ? "On" : "Off"}
            checked={hyphens}
            onCheckedChange={setHyphens}
            aria-label="toggle whether to add hyphens"
          />
        }
      />
    ),
    [hyphens]
  );

  const uppercaseConfig = useMemo(
    () => (
      <Configuration
        icon={<icons.CaseSensitive size={24} />}
        title="Uppercase"
        control={
          <LabeledSwitch
            id="uppercase-switch"
            label={uppercase ? "On" : "Off"}
            checked={uppercase}
            onCheckedChange={setUppercase}
            aria-label="toggle whether to generate in uppercase"
          />
        }
      />
    ),
    [uppercase]
  );

  const uuidVersionConfig = useMemo(
    () => (
      <Configuration
        icon={<icons.Settings2 size={24} />}
        title="UUID version"
        description="Choose the version of UUID to generate"
        control={
          <Select value={uuidVersion} onValueChange={onUuidVersionChange}>
            <SelectTrigger
              className="w-28"
              aria-label="toggle open/close state of uuid version selection"
            >
              <SelectValue placeholder={uuidVersion} />
            </SelectTrigger>
            <SelectContent>
              <SelectItem value={v1}>1</SelectItem>
              <SelectItem value={v4}>4 (GUID)</SelectItem>
            </SelectContent>
          </Select>
        }
      />
    ),
    [uuidVersion]
  );

  const generatesInput = useMemo(
    () => (
      <Input
        className="w-24 font-sans"
        type="number"
        value={generates}
        onChange={onGeneratesChange}
      />
    ),
    [generates]
  );

  const uuidsCopyButton = useMemo(() => <CopyButton text={uuidsString} />, [uuidsString]);

  const uuidsClearButton = useMemo(
    () => <ClearButton onClick={clearUuids} iconOnly aria-label="clear uuids" />,
    [clearUuids]
  );

  const uuidsControl = <ControlMenu list={[uuidsCopyButton, uuidsClearButton]} />;

  return (
    <PageRootSection title={toolGroups.generators.tools.uuid.longTitle}>
      <PageSection title="Configuration">
        <Configurations list={[hyphensConfig, uppercaseConfig, uuidVersionConfig]} />
      </PageSection>
      <PageSection className="mt-6" title="Generate">
        <div className="flex items-center gap-2">
          <Button variant="secondary" onClick={onGenerateClick}>
            Generate UUID(s)
          </Button>
          <span>×</span>
          {generatesInput}
        </div>
      </PageSection>
      <PageSection title="UUID(s)" control={uuidsControl}>
        <Textarea {...{ ref }} value={uuidsString} rows={10} readOnly />
      </PageSection>
    </PageRootSection>
  );
}