import { Clipboard, ClipboardCheck } from "lucide-react";
import type { Language, PrismTheme } from "prism-react-renderer";
import { Highlight, Prism } from "prism-react-renderer";
import { forwardRef, ReactNode, useCallback, useState } from "react";
import { cn } from "~/utils/cn";
import { Paragraph } from "../primitives/Paragraph";
import { Tooltip, TooltipContent, TooltipProvider, TooltipTrigger } from "../primitives/Tooltip";

//This is a fork of https://github.com/mantinedev/mantine/blob/master/src/mantine-prism/src/Prism/Prism.tsx
//it didn't support highlighting lines by dimming the rest of the code, or animations on the highlighting

async function setup() {
  (typeof global !== "undefined" ? global : window).Prism = Prism;
  //@ts-ignore
  await import("prismjs/components/prism-json");
  //@ts-ignore
  await import("prismjs/components/prism-typescript");
}
setup();

type CodeBlockProps = {
  /** Code which will be highlighted */
  code: string;

  /** Programming language that should be highlighted */
  language?: Language;

  /** Show copy to clipboard button */
  showCopyButton?: boolean;

  /** Display line numbers */
  showLineNumbers?: boolean;

  /** Highlight line at given line number with color from theme.colors */
  highlightedRanges?: [number, number][];

  /** Add/override classes on the overall element */
  className?: string;

  /** Add/override code theme */
  theme?: PrismTheme;

  /** Max lines */
  maxLines?: number;

  /** Whether to show the chrome, if you provide a string it will be used as the title, */
  showChrome?: boolean;

  /** filename */
  fileName?: string;

  /** title text for the Title row */
  rowTitle?: string;
};

const dimAmount = 0.5;
const extraLinesWhenClipping = 0.35;

const defaultTheme: PrismTheme = {
  plain: {
    color: "#9C9AF2",
    backgroundColor: "rgba(0, 0, 0, 0)",
  },
  styles: [
    {
      types: ["comment", "prolog", "doctype", "cdata"],
      style: {
        color: "#5F6570",
      },
    },
    {
      types: ["punctuation"],
      style: {
        color: "#878C99",
      },
    },
    {
      types: ["property", "tag", "boolean", "number", "constant", "symbol", "deleted"],
      style: {
        color: "#9B99FF",
      },
    },
    {
      types: ["selector", "attr-name", "string", "char", "builtin", "inserted"],
      style: {
        color: "#AFEC73",
      },
    },
    {
      types: ["operator", "entity", "url"],
      style: {
        color: "#D4D4D4",
      },
    },
    {
      types: ["variable"],
      style: {
        color: "#CCCBFF",
      },
    },
    {
      types: ["atrule", "attr-value", "keyword"],
      style: {
        color: "#E888F8",
      },
    },
    {
      types: ["function", "class-name"],
      style: {
        color: "#D9F07C",
      },
    },
    {
      types: ["regex"],
      style: {
        color: "#d16969",
      },
    },
    {
      types: ["important", "bold"],
      style: {
        fontWeight: "bold",
      },
    },
    {
      types: ["italic"],
      style: {
        fontStyle: "italic",
      },
    },
    {
      types: ["namespace"],
      style: {
        opacity: 0.7,
      },
    },
    {
      types: ["deleted"],
      style: {
        color: "#F85149",
      },
    },
    {
      types: ["boolean"],
      style: {
        color: "#9B99FF",
      },
    },
    {
      types: ["char"],
      style: {
        color: "#b5cea8",
      },
    },
    {
      types: ["tag"],
      style: {
        color: "#D7BA7D",
      },
    },
    {
      types: ["keyword.operator"],
      style: {
        color: "#8271ED",
      },
    },
    {
      types: ["meta.template.expression"],
      style: {
        color: "#d4d4d4",
      },
    },
  ],
};

export const CodeBlock = forwardRef<HTMLDivElement, CodeBlockProps>(
  (
    {
      showCopyButton = true,
      showLineNumbers = true,
      highlightedRanges,
      code,
      className,
      language = "typescript",
      theme = defaultTheme,
      maxLines,
      showChrome = false,
      fileName,
      rowTitle,
      ...props
    }: CodeBlockProps,
    ref
  ) => {
    const [mouseOver, setMouseOver] = useState(false);
    const [copied, setCopied] = useState(false);
    const onCopied = useCallback(
      (event: React.MouseEvent<HTMLButtonElement>) => {
        event.preventDefault();
        event.stopPropagation();
        navigator.clipboard.writeText(code);
        setCopied(true);
        setTimeout(() => {
          setCopied(false);
        }, 1500);
      },
      [code]
    );

    code = code.trim();
    const lineCount = code.split("\n").length;
    const maxLineWidth = lineCount.toString().length;
    let maxHeight: string | undefined = undefined;
    if (maxLines && lineCount > maxLines) {
      maxHeight = `calc(${(maxLines + extraLinesWhenClipping) * 0.75 * 1.625}rem + 1.5rem )`;
    }

    const highlightLines = highlightedRanges?.flatMap(([start, end]) =>
      Array.from({ length: end - start + 1 }, (_, i) => start + i)
    );

    // if there are more than 1000 lines, don't highlight
    const shouldHighlight = lineCount <= 1000;

    return (
      <div
        className={cn("relative overflow-hidden rounded-md border border-grid-bright", className)}
        style={{
          backgroundColor: theme.plain.backgroundColor,
        }}
        ref={ref}
        {...props}
        translate="no"
      >
        {showChrome && <Chrome title={fileName} />}
        {rowTitle && <TitleRow title={rowTitle} />}
        {showCopyButton && (
          <TooltipProvider>
            <Tooltip open={copied || mouseOver}>
              <TooltipTrigger
                onClick={onCopied}
                onMouseEnter={() => setMouseOver(true)}
                onMouseLeave={() => setMouseOver(false)}
                className={cn(
                  "absolute right-3 z-50 transition-colors duration-100 focus-custom hover:cursor-pointer",
                  showChrome ? "top-10" : "top-2.5",
                  copied ? "text-emerald-500" : "text-charcoal-500 hover:text-charcoal-300"
                )}
              >
                {copied ? <ClipboardCheck className="size-4" /> : <Clipboard className="size-4" />}
              </TooltipTrigger>
              <TooltipContent side="left" className="text-xs">
                {copied ? "Copied" : "Copy"}
              </TooltipContent>
            </Tooltip>
          </TooltipProvider>
        )}

        {shouldHighlight ? (
          <Highlight theme={theme} code={code} language={language}>
            {({
              className: inheritedClassName,
              style: inheritedStyle,
              tokens,
              getLineProps,
              getTokenProps,
            }) => (
              <div
                dir="ltr"
                className="overflow-auto px-2 py-3 scrollbar-thin scrollbar-track-transparent scrollbar-thumb-charcoal-600"
                style={{
                  maxHeight,
                }}
              >
                <pre
                  className={cn(
                    "relative mr-2 font-mono text-xs leading-relaxed",
                    inheritedClassName
                  )}
                  style={inheritedStyle}
                  dir="ltr"
                >
                  {tokens
                    .map((line, index) => {
                      if (
                        index === tokens.length - 1 &&
                        line.length === 1 &&
                        line[0].content === "\n"
                      ) {
                        return null;
                      }

                      const lineNumber = index + 1;
                      const lineProps = getLineProps({ line, key: index });

                      let hasAnyHighlights = highlightLines ? highlightLines.length > 0 : false;

                      let shouldDim = hasAnyHighlights;
                      if (hasAnyHighlights && highlightLines?.includes(lineNumber)) {
                        shouldDim = false;
                      }

                      return (
                        <div
                          key={lineNumber}
                          {...lineProps}
                          className={cn(
                            "flex w-full justify-start transition-opacity duration-500",
                            lineProps.className
                          )}
                          style={{
                            opacity: shouldDim ? dimAmount : undefined,
                            ...lineProps.style,
                          }}
                        >
                          {showLineNumbers && (
                            <div
                              className={
                                "mr-2 flex-none select-none text-right text-charcoal-500 transition-opacity duration-500"
                              }
                              style={{
                                width: `calc(8 * ${maxLineWidth / 16}rem)`,
                              }}
                            >
                              {lineNumber}
                            </div>
                          )}

                          <div className="flex-1">
                            {line.map((token, key) => {
                              const tokenProps = getTokenProps({ token, key });
                              return (
                                <span
                                  key={key}
                                  {...tokenProps}
                                  style={{
                                    color: tokenProps?.style?.color as string,
                                    ...tokenProps.style,
                                  }}
                                />
                              );
                            })}
                          </div>
                          <div className="w-4 flex-none" />
                        </div>
                      );
                    })
                    .filter(Boolean)}
                </pre>
              </div>
            )}
          </Highlight>
        ) : (
          <div
            dir="ltr"
            className="overflow-auto px-2 py-3 scrollbar-thin scrollbar-track-transparent scrollbar-thumb-charcoal-600"
            style={{
              maxHeight,
            }}
          >
            <pre className="relative mr-2 p-2 font-mono text-xs leading-relaxed" dir="ltr">
              {code}
            </pre>
          </div>
        )}
      </div>
    );
  }
);

CodeBlock.displayName = "CodeBlock";

function Chrome({ title }: { title?: string }) {
  return (
    <div className="grid h-7 grid-cols-[100px_auto_100px] border-b border-charcoal-800 bg-charcoal-900">
      <div className="ml-2 flex items-center gap-2">
        <div className="h-3 w-3 rounded-full bg-charcoal-700" />
        <div className="h-3 w-3 rounded-full bg-charcoal-700" />
        <div className="h-3 w-3 rounded-full bg-charcoal-700" />
      </div>
      <div className="flex items-center justify-center">
        <div className={cn("rounded-sm px-3 py-0.5 text-xs text-charcoal-500")}>{title}</div>
      </div>
      <div></div>
    </div>
  );
}

export function TitleRow({ title }: { title: ReactNode }) {
  return (
    <div className="flex items-center justify-between px-3">
      <Paragraph variant="small/bright" className="w-full border-b border-grid-dimmed py-2">
        {title}
      </Paragraph>
    </div>
  );
}
