import {
  Downasaur,
  Github,
  Home as HomeIcon,
  Image,
  ImageDelete,
  Mail,
  Notes,
} from "@nsmr/pixelart-react";
import { useEffect, useState } from "react";
import { Link, Route, Routes, useNavigate, useParams } from "react-router-dom";
import { AskAI } from "@/components/ask-ai";
import { ProjectListItem } from "@/components/ProjectListItem";
import { TimeSince } from "@/components/time-since";
import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
import { type ProjectEntry, projectList, projects } from "@/projects";
import { locationPhotos, locations } from "@/travel";
import { ThemeToggle } from "./components/theme-toggle";
import { Button } from "./components/ui/button";
import { cn } from "./lib/utils";

const asciiFiles = [
  "cat-sleep.txt",
  "polar-bear.txt",
  "penguin-surfboard.txt",
  "cat-shock.txt",
  "exclamation.txt",
  "fat-cat-head.txt",
  "grumpy-dog.txt",
  "cat-peek.txt",
  "cat-loaf.txt",
];

const homeTabs = ["work", "travel"] as const;
type HomeTab = (typeof homeTabs)[number];

function App() {
  return (
    <Routes>
      <Route path="/" element={<Home />} />
      <Route path="/projects/:slug" element={<ProjectRoute />} />
      <Route path="*" element={<NotFound />} />
    </Routes>
  );
}

export default App;

function Home() {
  const isDevMode = import.meta.env.VITE_PUBLIC_DEV === "1";
  const isTabsEnabled = import.meta.env.VITE_TABS === "1";
  const navigate = useNavigate();
  const [asciiArt, setAsciiArt] = useState("");
  const [activeTab, setActiveTab] = useState<HomeTab>("work");
  const [activeIndex, setActiveIndex] = useState<number | null>(null);
  const [activeLocation, setActiveLocation] = useState<number | null>(null);
  const [activePhoto, setActivePhoto] = useState<string | null>(null);
  const [hasPointerInteraction, setHasPointerInteraction] = useState(false);
  const [asciiFile] = useState(
    () => asciiFiles[Math.floor(Math.random() * asciiFiles.length)],
  );
  const sortedProjects: ProjectEntry[] = [...projectList].sort(
    (a, b) =>
      parseDate(b.metadata.date).getTime() -
      parseDate(a.metadata.date).getTime(),
  );
  const visibleProjects = sortedProjects.filter(
    (project) => isDevMode || !project.metadata.hidden,
  );

  useEffect(() => {
    let isActive = true;
    fetch(`/ascii/${asciiFile}`)
      .then((response) => response.text())
      .then((text) => {
        if (isActive) setAsciiArt(text);
      });
    return () => {
      isActive = false;
    };
  }, [asciiFile]);

  useEffect(() => {
    setActiveIndex((prev) => {
      if (visibleProjects.length === 0) return null;
      if (prev === null) return null;
      return Math.min(prev, visibleProjects.length - 1);
    });
  }, [visibleProjects.length]);

  useEffect(() => {
    if (visibleProjects.length === 0) return;

    const handleKeyDown = (event: KeyboardEvent) => {
      if (event.defaultPrevented || event.isComposing) return;
      if (event.metaKey || event.ctrlKey || event.altKey) return;

      if (isTabsEnabled && event.key === "Tab") {
        event.preventDefault();
        setActiveTab((prev) => {
          const currentIndex = homeTabs.indexOf(prev);
          const safeIndex = currentIndex === -1 ? 0 : currentIndex;
          const nextIndex = (safeIndex + 1) % homeTabs.length;
          return homeTabs[nextIndex];
        });
        return;
      }

      if (isInteractiveTarget(event.target)) return;

      const key = event.key.length === 1 ? event.key.toLowerCase() : event.key;
      const isDesktop = window.matchMedia("(min-width: 768px)").matches;
      const columns = isDesktop ? 2 : 1;

      let delta = 0;
      if (key === "ArrowLeft" || key === "h") delta = -1;
      if (key === "ArrowRight" || key === "l") delta = 1;
      if (key === "ArrowUp" || key === "k") delta = -columns;
      if (key === "ArrowDown" || key === "j") delta = columns;

      if (delta !== 0) {
        event.preventDefault();
        setActiveIndex((prev) => {
          if (prev === null) return 0;
          const next = Math.max(
            0,
            Math.min(visibleProjects.length - 1, prev + delta),
          );
          return next;
        });
        return;
      }

      if (key === "Enter") {
        if (activeIndex === null) return;
        event.preventDefault();
        const target = visibleProjects[activeIndex];
        if (!target) return;
        navigate(`/projects/${target.metadata.slug}`);
      }
    };

    window.addEventListener("keydown", handleKeyDown);
    return () => {
      window.removeEventListener("keydown", handleKeyDown);
    };
  }, [activeIndex, navigate, visibleProjects]);

  useEffect(() => {
    const enablePointerInteraction = () => {
      setHasPointerInteraction(true);
    };

    window.addEventListener("pointermove", enablePointerInteraction, {
      once: true,
    });
    window.addEventListener("pointerdown", enablePointerInteraction, {
      once: true,
    });

    return () => {
      window.removeEventListener("pointermove", enablePointerInteraction);
      window.removeEventListener("pointerdown", enablePointerInteraction);
    };
  }, []);

  return (
    <div className="min-h-dvh flex flex-col items-center gap-2 text-2xl px-6 py-10">
      <div className="flex flex-col items-center gap-4 mb-4">
        {asciiArt ? (
          <pre className="text-[#000000] dark:text-[#ffffff] leading-1.75 tracking-[-1.75px]">
            <code className="commitmono text-[11px]">{asciiArt}</code>
          </pre>
        ) : null}
        <h1 className="text-center picnic text-8xl text-balance">
          Oliver Bryan
        </h1>
        <div className="flex flex-wrap items-center justify-center gap-3 text-base text-fg">
          <a
            href="https://github.com/hex248"
            rel="noreferrer"
            target="_blank"
            className="inline-flex items-center gap-2 hover:text-accent"
          >
            <Github className="size-6" />
            hex248
          </a>
          <span className="text-fg/60">/</span>
          <a
            href="mailto:ob248@proton.me"
            className="inline-flex items-center gap-2 hover:text-accent"
          >
            <Mail className="size-6" />
            ob248@proton.me
          </a>
          <span className="text-fg/60">/</span>
          <a
            href="/cv.pdf"
            className="inline-flex items-center gap-2 hover:text-accent"
          >
            <Notes className="size-6" /> CV
          </a>
        </div>
        <div className="text-base text-fg">
          Age: <TimeSince date={new Date(2004, 10, 4, 11, 47, 0)} />
        </div>
      </div>
      {isTabsEnabled ? (
        <Tabs
          value={activeTab}
          onValueChange={(value) => setActiveTab(value as HomeTab)}
          className="w-full max-w-5xl gap-0"
        >
          <TabsList
            variant="line"
            className="relative z-0 h-auto w-full gap-0 p-0"
          >
            <TabsTrigger
              value={homeTabs[0]}
              className="border-border -mr-[1px] after:hidden data-[state=active]:text-accent"
            >
              Work
            </TabsTrigger>
            <TabsTrigger
              value={homeTabs[1]}
              className="border-border after:hidden data-[state=active]:text-accent"
            >
              Travel
            </TabsTrigger>
          </TabsList>
          <TabsContent value={homeTabs[0]} className="relative z-10">
            <div className="-mt-[1.5px] border p-2 grid grid-cols-1 gap-2 md:grid-cols-2">
              {visibleProjects.map((project, index) => (
                <ProjectListItem
                  key={project.metadata.slug}
                  metadata={project.metadata}
                  isDevMode={isDevMode}
                  isActive={activeIndex !== null && index === activeIndex}
                  enableHover={hasPointerInteraction}
                />
              ))}
            </div>
          </TabsContent>
          <TabsContent value={homeTabs[1]} className="relative z-10">
            <div className="-mt-[1px] grid grid-cols-1">
              {locations.map((location, index) => (
                <>
                  <Button
                    className={cn(
                      "text-sm border cursor-pointer hover:border-accent justify-start",
                    )}
                    onClick={(_e) => {
                      setActivePhoto(null);
                      setActiveLocation((prev) =>
                        prev === index ? null : index,
                      );
                    }}
                    variant="dummy"
                    size="sm"
                  >
                    {location.city}, {location.country} - {location.date}
                  </Button>
                  {activeLocation === index &&
                    (locationPhotos[location.id].length === 0 ? (
                      <div className="flex">
                        <div className="flex flex-col flex-1 ml-8">
                          <Button
                            disabled
                            className={cn(
                              "flex text-sm border cursor-pointer hover:border-accent items-center justify-start p-0 pl-2 ",
                            )}
                            variant="dummy"
                            size="sm"
                          >
                            <ImageDelete size={16} /> No photos available
                          </Button>
                        </div>
                      </div>
                    ) : (
                      <div className="flex">
                        <div className="flex flex-col flex-1 ml-8">
                          {locationPhotos[location.id].map((photo) => (
                            <Button
                              key={photo}
                              onClick={() => {
                                const path = `/travel/${location.city} ${location.country} ${location.date}/${photo}`;
                                setActivePhoto((prev) =>
                                  prev === path ? null : path,
                                );
                              }}
                              className={cn(
                                "flex text-sm border cursor-pointer hover:border-accent items-center justify-start p-0 pl-2 ",
                              )}
                              variant="dummy"
                              size="sm"
                            >
                              <Image size={22} />
                              {photo}
                            </Button>
                          ))}
                        </div>
                        {activePhoto ? (
                          <img
                            className={"flex-1 max-w-sm"}
                            src={activePhoto}
                            alt={"active-photo"}
                          />
                        ) : (
                          <div
                            className={
                              "flex-1 max-w-sm border flex items-center justify-center text-sm gap-4"
                            }
                          >
                            <ImageDelete />
                            No photo selected
                          </div>
                        )}
                      </div>
                    ))}
                </>
              ))}
            </div>
          </TabsContent>
        </Tabs>
      ) : (
        <div className="w-full max-w-5xl grid grid-cols-1 gap-2 md:grid-cols-2">
          {visibleProjects.map((project, index) => (
            <ProjectListItem
              key={project.metadata.slug}
              metadata={project.metadata}
              isDevMode={isDevMode}
              isActive={activeIndex !== null && index === activeIndex}
              enableHover={hasPointerInteraction}
            />
          ))}
        </div>
      )}
      <div className="w-full max-w-5xl grid grid-cols-1 md:grid-cols-[1fr_auto_1fr] items-center gap-3 md:gap-4">
        <div className="flex items-center gap-6">
          <AskAI name="me" inline />
        </div>
        <p className="text-xs text-fg/80 text-center text-pretty">
          arrows or hjkl, then enter
        </p>
        <div className="justify-self-center md:justify-self-end">
          <ThemeToggle />
        </div>
      </div>
    </div>
  );
}

function isInteractiveTarget(target: EventTarget | null): boolean {
  if (!(target instanceof HTMLElement)) return false;
  if (target.isContentEditable) return true;
  const tagName = target.tagName;
  return (
    tagName === "INPUT" ||
    tagName === "TEXTAREA" ||
    tagName === "SELECT" ||
    tagName === "BUTTON" ||
    tagName === "A"
  );
}

function ProjectRoute() {
  const { slug } = useParams();
  if (!slug || !projects[slug]) return <NotFound />;

  const { Component } = projects[slug];
  return <Component />;
}

function NotFound() {
  return (
    <div
      className={`w-full h-[100vh] flex flex-col items-center justify-center gap-4`}
    >
      <span className="-ml-14 -mb-7 -rotate-20 text-xl text-accent">?</span>
      <Downasaur size={72} className="text-accent" />
      <span className="text-7xl">404</span>
      <span className="text-2xl">Not Found</span>

      <Link to="/">
        <HomeIcon className="size-12 hover:text-accent" />
      </Link>
    </div>
  );
}

// function NotFound() {
// 	return (
// 		<div className="min-h-dvh flex flex-col items-center justify-center gap-4 text-2xl">
// 			<Downasaur className="size-24 text-accent" />
// 			<Link to="/">
// 				<HomeIcon className="size-12 hover:text-accent" />
// 			</Link>
// 		</div>
// 	);
// }

function parseDate(dateStr: string): Date {
  const lower = dateStr.toLowerCase();

  if (lower.includes("q1")) return new Date("2023-01-01");
  if (lower.includes("q2")) return new Date("2023-04-01");
  if (lower.includes("q3")) return new Date("2023-07-01");
  if (lower.includes("q4")) return new Date("2023-10-01");

  const months: Record<string, number> = {
    january: 0,
    february: 1,
    march: 2,
    april: 3,
    may: 4,
    june: 5,
    july: 6,
    august: 7,
    september: 8,
    october: 9,
    november: 10,
    december: 11,
  };

  for (const [monthName, monthIndex] of Object.entries(months)) {
    if (lower.includes(monthName)) {
      const yearMatch = dateStr.match(/\b(20\d{2})\b/);
      if (yearMatch) {
        return new Date(Number.parseInt(yearMatch[1], 10), monthIndex, 1);
      }
    }
  }

  const yearMatch = dateStr.match(/\b(20\d{2})\b/);
  if (yearMatch) {
    return new Date(Number.parseInt(yearMatch[1], 10), 0, 1);
  }

  return new Date(0);
}