import { useEffect, useRef, useState } from "react";
import Editor from "@monaco-editor/react";
import { Info } from "lucide-react";

import type { ScriptItem } from "../../services/api";

interface PythonEditorProps {
  script: ScriptItem;
  scriptId: string;
  initialContent: string;
  saving: boolean;
  dirty: boolean;
  loading: boolean;
  loadError?: string | null;
  onChange: (scriptId: string, value: string) => void;
  onSave: (scriptId: string) => void;
  onEndEditing: (scriptId: string) => void;
  onCloseTab: (scriptId: string) => void;
}

export function PythonEditor({
  script,
  scriptId,
  initialContent,
  saving,
  dirty,
  loading,
  loadError,
  onChange,
  onSave,
  onEndEditing,
  onCloseTab,
}: PythonEditorProps) {
  const containerRef = useRef<HTMLDivElement | null>(null);
  const [value, setValue] = useState(initialContent);

  useEffect(() => {
    const onKey = (e: KeyboardEvent) => {
      const mod = e.metaKey || e.ctrlKey;
      if (!mod) return;
      if (e.key.toLowerCase() === "s") {
        e.preventDefault();
        if (dirty && !saving) onSave(scriptId);
      } else if (e.key.toLowerCase() === "w") {
        e.preventDefault();
        onCloseTab(scriptId);
      }
    };
    containerRef.current?.addEventListener("keydown", onKey);
    return () => containerRef.current?.removeEventListener("keydown", onKey);
  }, [dirty, saving, onSave, onCloseTab, scriptId]);

  useEffect(() => {
    if (!dirty || saving) return;
    const t = window.setTimeout(() => onSave(scriptId), 30_000);
    return () => window.clearTimeout(t);
  }, [value, dirty, saving, onSave, scriptId]);

  const hasSyncedRef = useRef(false);
  useEffect(() => {
    if (!loading && initialContent !== null && !hasSyncedRef.current) {
      setValue(initialContent);
      hasSyncedRef.current = true;
    }
  }, [loading, initialContent]);

  if (loading) {
    return (
      <div className="flex h-full min-h-0 flex-col bg-white" ref={containerRef}>
        <section
          className="mx-auto my-16 flex w-[min(520px,calc(100%-48px))] min-h-[260px] flex-col items-center justify-center rounded-[10px] border border-[#dce5ed] bg-white/95 p-9 text-center text-[#66788d] shadow-[0_12px_34px_rgb(31_64_98/7%)]"
          aria-live="polite"
        >
          <div className="mb-4 grid size-[54px] place-items-center rounded-full bg-[#edf6ff] text-[#247bc5]">
            <span className="button-spinner button-spinner--blue size-6 border-[3px]" />
          </div>
          <strong className="text-base text-[#1d344d]">正在打开 Python 编辑器</strong>
          <p className="mt-[9px] max-w-[430px] text-xs leading-[1.7] text-[#7a8a9b]">
            正在加载文件内容…
          </p>
        </section>
      </div>
    );
  }

  if (loadError) {
    return (
      <div className="flex h-full min-h-0 flex-col bg-white" ref={containerRef}>
        <section
          className="mx-auto my-16 flex w-[min(520px,calc(100%-48px))] min-h-[260px] flex-col items-center justify-center rounded-[10px] border border-[#f0cfcc] bg-white/95 p-9 text-center text-[#66788d] shadow-[0_12px_34px_rgb(31_64_98/7%)]"
          aria-live="polite"
        >
          <div className="mb-4 grid size-[54px] place-items-center rounded-full bg-[#fff1f0] text-[#c84f49]">
            <Info size={28} />
          </div>
          <strong className="text-base text-[#1d344d]">Python 编辑器打开失败</strong>
          <p className="mt-[9px] max-w-[430px] text-xs leading-[1.7] text-[#7a8a9b] [overflow-wrap:anywhere]">
            {loadError}
          </p>
        </section>
      </div>
    );
  }

  return (
    <div className="flex h-full min-h-0 flex-col bg-white" ref={containerRef}>
      {dirty && (
        <div className="flex items-center gap-2 border-b border-[#f0d8a8] bg-[#fff7e6] px-3.5 py-1.5 text-xs font-medium text-[#9b6a18] before:text-[10px] before:text-[#d49b00] before:content-['●']">
          未保存修改
        </div>
      )}
      <div className="flex items-center gap-4 border-b border-[#e6e8ec] bg-[#f5f7fa] px-3.5 py-1 text-[11px] text-[#6b7280]">
        <span className="inline-flex items-center gap-1.5">
          <i className="size-1.5 rounded-full bg-[#20b77d]" />
          Workspace Python Editor
        </span>
        <span>{script.relative_path}</span>
      </div>
      <div className="relative min-h-0 flex-1 overflow-hidden">
        <Editor
          height="100%"
          language="python"
          theme="vs"
          value={value}
          onChange={(v) => {
            setValue(v ?? "");
            onChange(scriptId, v ?? "");
          }}
          options={{
            minimap: { enabled: initialContent.length > 5000 },
            wordWrap: "on",
            fontSize: 13,
            automaticLayout: true,
            renderLineHighlight: "gutter",
            contextmenu: false,
            dragAndDrop: false,
            scrollBeyondLastLine: false,
          }}
        />
      </div>
    </div>
  );
}