"use client";

import Image from "next/image";
import { useEffect, useRef, useState } from "react";
import type { NotebookProject } from "./notebookProjects";
import type { NotebookFrame } from "./notebookTimeline";

export type NotebookBrowserProps = {
  projects: NotebookProject[];
  activeIndex: number;
  frame: Pick<
    NotebookFrame,
    "cursorVisible" | "cursorX" | "cursorY" | "cursorClicking"
  >;
  onSelectTab: (index: number) => void;
  interactive?: boolean;
};

function clampIndex(index: number, length: number): number {
  if (length < 1) return -1;
  return Math.min(Math.max(index, 0), length - 1);
}

function toDomId(value: string): string {
  return value.replace(/[^a-zA-Z0-9_-]/g, "-");
}

export default function NotebookBrowser({
  projects,
  activeIndex,
  frame,
  onSelectTab,
  interactive = true,
}: NotebookBrowserProps) {
  const selectedIndex = clampIndex(activeIndex, projects.length);
  const selectedProject =
    selectedIndex >= 0 ? projects[selectedIndex] : undefined;
  const previousIndexRef = useRef(selectedIndex);
  const [outgoingIndex, setOutgoingIndex] = useState<number | null>(null);
  useEffect(() => {
    const previousIndex = previousIndexRef.current;
    if (previousIndex === selectedIndex) return undefined;

    previousIndexRef.current = selectedIndex;
    setOutgoingIndex(previousIndex >= 0 ? previousIndex : null);
    const timeout = window.setTimeout(() => setOutgoingIndex(null), 180);
    return () => window.clearTimeout(timeout);
  }, [selectedIndex]);

  const outgoingProject =
    outgoingIndex !== null ? projects[outgoingIndex] : undefined;
  const nextProject =
    selectedIndex >= 0 && projects.length > 1
      ? projects[(selectedIndex + 1) % projects.length]
      : undefined;
  const interactionProps = interactive
    ? {}
    : {
        "aria-hidden": true,
        inert: true,
      };

  function handleTabKeyDown(
    event: React.KeyboardEvent<HTMLButtonElement>,
    index: number,
  ) {
    if (projects.length < 1) return;

    let nextIndex: number | null = null;
    if (event.key === "ArrowRight" || event.key === "ArrowDown") {
      nextIndex = Math.min(index + 1, projects.length - 1);
    } else if (event.key === "ArrowLeft" || event.key === "ArrowUp") {
      nextIndex = Math.max(index - 1, 0);
    } else if (event.key === "Home") {
      nextIndex = 0;
    } else if (event.key === "End") {
      nextIndex = projects.length - 1;
    }

    if (nextIndex === null) return;
    event.preventDefault();
    event.currentTarget.parentElement
      ?.querySelectorAll<HTMLButtonElement>('[role="tab"]')
      [nextIndex]?.focus();
    onSelectTab(nextIndex);
  }

  if (!selectedProject) {
    return (
      <div
        {...interactionProps}
        className="notebook-browser"
        data-testid="notebook-browser"
        data-empty
      >
        <p aria-live="polite">Nenhum projeto disponível para esta cena.</p>
      </div>
    );
  }

  const selectedId = toDomId(selectedProject.id);
  const panelId = `notebook-panel-${selectedId}`;

  return (
    <div
      {...interactionProps}
      className="notebook-browser"
      data-testid="notebook-browser"
    >
      <div className="notebook-browser-bar" aria-hidden="true">
        <span className="notebook-browser-dot" />
        <span className="notebook-browser-dot" />
        <span className="notebook-browser-dot" />
        <span className="notebook-browser-address">
          evandro.dev.br / projetos
        </span>
      </div>

      <div className="notebook-browser-body">
        <div className="notebook-browser-heading">
          <span className="notebook-browser-eyebrow">Projetos em produção</span>
          <span className="notebook-browser-counter">
            {String(selectedIndex + 1).padStart(2, "0")} /{" "}
            {String(projects.length).padStart(2, "0")}
          </span>
        </div>
        <output className="sr-only" aria-live="polite">
          Projeto ativo: {selectedProject.title}
        </output>

        <div
          className="notebook-tablist"
          role="tablist"
          aria-label="Projetos em produção"
        >
          {projects.map((project, index) => {
            const tabId = `notebook-tab-${toDomId(project.id)}`;
            const isSelected = index === selectedIndex;

            return (
              <button
                aria-controls={panelId}
                aria-selected={isSelected}
                className="notebook-tab"
                id={tabId}
                key={project.id}
                onClick={() => onSelectTab(index)}
                onKeyDown={(event) => handleTabKeyDown(event, index)}
                role="tab"
                tabIndex={isSelected ? 0 : -1}
                type="button"
              >
                <span className="notebook-tab-number">
                  {String(index + 1).padStart(2, "0")}
                </span>
                <span className="notebook-tab-title">{project.title}</span>
              </button>
            );
          })}
        </div>

        <div
          aria-labelledby={`notebook-tab-${selectedId}`}
          className="notebook-panel"
          id={panelId}
          role="tabpanel"
        >
          <div className="notebook-panel-copy">
            <h3>{selectedProject.title}</h3>
            <p>{selectedProject.subtitle}</p>
            <ul aria-label={`Tecnologias de ${selectedProject.title}`}>
              {selectedProject.technologies.slice(0, 4).map((technology) => (
                <li key={technology}>{technology}</li>
              ))}
            </ul>
            <a
              href={selectedProject.demoUrl}
              rel="noopener noreferrer"
              target="_blank"
            >
              Abrir projeto <span aria-hidden="true">↗</span>
            </a>
          </div>

          <div className="notebook-screenshot-wrap">
            {outgoingProject ? (
              <Image
                alt=""
                aria-hidden="true"
                className="notebook-screenshot notebook-screenshot-outgoing"
                fill
                sizes="(min-width: 681px) 60vw, 100vw"
                src={outgoingProject.screenshotSrc}
                unoptimized
              />
            ) : null}
            <Image
              alt={`Captura de tela de ${selectedProject.title}`}
              className="notebook-screenshot notebook-screenshot-current"
              fill
              sizes="(min-width: 681px) 60vw, 100vw"
              src={selectedProject.screenshotSrc}
              unoptimized
            />
            {nextProject ? (
              <Image
                alt=""
                aria-hidden="true"
                className="notebook-screenshot-preload"
                fill
                sizes="1px"
                src={nextProject.screenshotSrc}
                unoptimized
              />
            ) : null}
            {frame.cursorVisible ? (
              <span
                aria-hidden="true"
                className={`notebook-cursor${frame.cursorClicking ? " is-clicking" : ""}`}
                data-testid="notebook-cursor"
                style={{
                  left: `${frame.cursorX * 100}%`,
                  top: `${frame.cursorY * 100}%`,
                }}
              />
            ) : null}
          </div>
        </div>
      </div>
    </div>
  );
}