"use client";

import { SparklesIcon } from "lucide-react";
import { useRouter } from "next/navigation";
import { useMemo, useState } from "react";

import { Button } from "@/components/ui/button";
import {
  Empty,
  EmptyContent,
  EmptyDescription,
  EmptyHeader,
  EmptyMedia,
  EmptyTitle,
} from "@/components/ui/empty";
import {
  Item,
  ItemActions,
  ItemTitle,
  ItemContent,
  ItemDescription,
} from "@/components/ui/item";
import { Switch } from "@/components/ui/switch";
import { Tabs, TabsList, TabsTrigger } from "@/components/ui/tabs";
import { useI18n } from "@/core/i18n/hooks";
import { useEnableSkill, useSkills } from "@/core/skills/hooks";
import type { Skill } from "@/core/skills/type";
import { env } from "@/env";

import { SettingsSection } from "./settings-section";

export function SkillSettingsPage({ onClose }: { onClose?: () => void } = {}) {
  const { t } = useI18n();
  const { skills, isLoading, error } = useSkills();
  return (
    <SettingsSection
      title={t.settings.skills.title}
      description={t.settings.skills.description}
    >
      {isLoading ? (
        <div className="text-muted-foreground text-sm">{t.common.loading}</div>
      ) : error ? (
        <div>Error: {error.message}</div>
      ) : (
        <SkillSettingsList skills={skills} onClose={onClose} />
      )}
    </SettingsSection>
  );
}

function SkillSettingsList({
  skills,
  onClose,
}: {
  skills: Skill[];
  onClose?: () => void;
}) {
  const { t } = useI18n();
  const router = useRouter();
  const [filter, setFilter] = useState<string>("public");
  const { mutate: enableSkill } = useEnableSkill();
  const filteredSkills = useMemo(
    () => skills.filter((skill) => skill.category === filter),
    [skills, filter],
  );
  const handleCreateSkill = () => {
    onClose?.();
    router.push("/workspace/chats/new?mode=skill");
  };
  return (
    <div className="flex w-full flex-col gap-4">
      <header className="flex justify-between">
        <div className="flex gap-2">
          <Tabs defaultValue="public" onValueChange={setFilter}>
            <TabsList variant="line">
              <TabsTrigger value="public">{t.common.public}</TabsTrigger>
              <TabsTrigger value="custom">{t.common.custom}</TabsTrigger>
            </TabsList>
          </Tabs>
        </div>
        <div>
          <Button variant="outline" size="sm" onClick={handleCreateSkill}>
            {t.settings.skills.createSkill}
          </Button>
        </div>
      </header>
      {filteredSkills.length === 0 && (
        <EmptySkill onCreateSkill={handleCreateSkill} />
      )}
      {filteredSkills.length > 0 &&
        filteredSkills.map((skill) => (
          <Item className="w-full" variant="outline" key={skill.name}>
            <ItemContent>
              <ItemTitle>
                <div className="flex items-center gap-2">{skill.name}</div>
              </ItemTitle>
              <ItemDescription className="line-clamp-4">
                {skill.description}
              </ItemDescription>
            </ItemContent>
            <ItemActions>
              <Switch
                checked={skill.enabled}
                disabled={env.NEXT_PUBLIC_STATIC_WEBSITE_ONLY === "true"}
                onCheckedChange={(checked) =>
                  enableSkill({ skillName: skill.name, enabled: checked })
                }
              />
            </ItemActions>
          </Item>
        ))}
    </div>
  );
}

function EmptySkill({ onCreateSkill }: { onCreateSkill: () => void }) {
  return (
    <Empty>
      <EmptyHeader>
        <EmptyMedia variant="icon">
          <SparklesIcon />
        </EmptyMedia>
        <EmptyTitle>No agent skill yet</EmptyTitle>
        <EmptyDescription>
          Put your agent skill folders under the `/skills/custom` folder under
          the root folder of DeerFlow.
        </EmptyDescription>
      </EmptyHeader>
      <EmptyContent>
        <Button onClick={onCreateSkill}>Create Your First Skill</Button>
      </EmptyContent>
    </Empty>
  );
}