import type { EditorView } from "@codemirror/view";
import type {
  Folder,
  GrpcRequest,
  HttpRequest,
  WebsocketRequest,
  Workspace,
} from "@yaakapp-internal/models";
import type { TemplateFunction } from "@yaakapp-internal/plugins";
import type { FnArg, Tokens } from "@yaakapp-internal/templates";
import { parseTemplate } from "@yaakapp-internal/templates";
import classNames from "classnames";
import { useEffect, useMemo, useState } from "react";
import { activeWorkspaceAtom } from "../hooks/useActiveWorkspace";
import { useDebouncedValue } from "../hooks/useDebouncedValue";
import { useRenderTemplate } from "../hooks/useRenderTemplate";
import { useTemplateFunctionConfig } from "../hooks/useTemplateFunctionConfig";
import {
  templateTokensToString,
  useTemplateTokensToString,
} from "../hooks/useTemplateTokensToString";
import { useToggle } from "../hooks/useToggle";
import { showDialog } from "../lib/dialog";
import { convertTemplateToInsecure } from "../lib/encryption";
import { jotaiStore } from "../lib/jotai";
import { setupOrConfigureEncryption } from "../lib/setupOrConfigureEncryption";
import { Button } from "./core/Button";
import { collectArgumentValues } from "./core/Editor/twig/util";
import { IconButton } from "./core/IconButton";
import { InlineCode } from "./core/InlineCode";
import { LoadingIcon } from "./core/LoadingIcon";
import { PlainInput } from "./core/PlainInput";
import { HStack } from "./core/Stacks";
import { DYNAMIC_FORM_NULL_ARG, DynamicForm } from "./DynamicForm";

interface Props {
  templateFunction: TemplateFunction;
  initialTokens: Tokens;
  hide: () => void;
  onChange: (insert: string) => void;
  model: HttpRequest | GrpcRequest | WebsocketRequest | Folder | Workspace;
}

export function TemplateFunctionDialog({ initialTokens, templateFunction, ...props }: Props) {
  const [initialArgValues, setInitialArgValues] = useState<Record<string, string | boolean> | null>(
    null,
  );
  useEffect(() => {
    if (initialArgValues != null) {
      return;
    }

    (async () => {
      const initial = collectArgumentValues(initialTokens, templateFunction);

      // HACK: Replace the secure() function's encrypted `value` arg with the decrypted version so
      //  we can display it in the editor input.
      if (templateFunction.name === "secure") {
        const template = await templateTokensToString(initialTokens);
        initial.value = await convertTemplateToInsecure(template);
      }

      setInitialArgValues(initial);
    })().catch(console.error);
  }, [
    initialArgValues,
    initialTokens,
    initialTokens.tokens,
    templateFunction,
    templateFunction.args,
    templateFunction.name,
  ]);

  if (initialArgValues == null) return null;

  return (
    <InitializedTemplateFunctionDialog
      {...props}
      templateFunction={templateFunction}
      initialArgValues={initialArgValues}
    />
  );
}

function InitializedTemplateFunctionDialog({
  templateFunction: { name, previewType: ogPreviewType },
  initialArgValues,
  hide,
  onChange,
  model,
}: Omit<Props, "initialTokens"> & {
  initialArgValues: Record<string, string | boolean>;
}) {
  const previewType = ogPreviewType == null ? "live" : ogPreviewType;
  const [showSecretsInPreview, toggleShowSecretsInPreview] = useToggle(false);
  const [argValues, setArgValues] = useState<Record<string, string | boolean>>(initialArgValues);

  const tokens: Tokens = useMemo(() => {
    const argTokens: FnArg[] = Object.keys(argValues).map((name) => ({
      name,
      value:
        argValues[name] === DYNAMIC_FORM_NULL_ARG
          ? { type: "null" }
          : typeof argValues[name] === "boolean"
            ? { type: "bool", value: argValues[name] === true }
            : { type: "str", text: String(argValues[name] ?? "") },
    }));

    return {
      tokens: [
        {
          type: "tag",
          val: {
            type: "fn",
            name,
            args: argTokens,
          },
        },
      ],
    };
  }, [argValues, name]);

  const tagText = useTemplateTokensToString(tokens);
  const templateFunction = useTemplateFunctionConfig(name, argValues, model);

  const handleDone = () => {
    if (tagText.data) {
      onChange(tagText.data);
    }
    hide();
  };

  const debouncedTagText = useDebouncedValue(tagText.data ?? "", 400);
  const [renderKey, setRenderKey] = useState<string | null>(null);
  const rendered = useRenderTemplate({
    template: debouncedTagText,
    enabled: previewType !== "none",
    purpose: previewType === "click" ? "send" : "preview",
    refreshKey: previewType === "live" ? renderKey + debouncedTagText : renderKey,
    ignoreError: false,
  });

  const tooLarge = rendered.data ? rendered.data.length > 10000 : false;
  // oxlint-disable-next-line react-hooks/exhaustive-deps -- Only update this on rendered data change to keep secrets hidden on input change
  const dataContainsSecrets = useMemo(() => {
    for (const [name, value] of Object.entries(argValues)) {
      const arg = templateFunction.data?.args.find((a) => "name" in a && a.name === name);
      const isTextPassword = arg?.type === "text" && arg.password;
      if (isTextPassword && typeof value === "string" && value && rendered.data?.includes(value)) {
        return true;
      }
    }
    return false;
  }, [rendered.data]);

  if (templateFunction.data == null || templateFunction.isPending) {
    return (
      <div className="h-full w-full flex items-center justify-center">
        <LoadingIcon size="xl" className="text-text-subtlest" />
      </div>
    );
  }

  return (
    <form
      className="grid grid-rows-[minmax(0,1fr)_auto_auto] h-full max-h-[90vh]"
      onSubmit={(e) => {
        e.preventDefault();
        handleDone();
      }}
    >
      <div className="overflow-y-auto h-full px-6">
        {name === "secure" ? (
          <PlainInput
            required
            label="Value"
            name="value"
            type="password"
            placeholder="••••••••••••"
            defaultValue={String(argValues.value ?? "")}
            onChange={(value) => setArgValues({ ...argValues, value })}
          />
        ) : (
          <DynamicForm
            autocompleteVariables
            autocompleteFunctions
            inputs={templateFunction.data.args}
            data={argValues}
            onChange={setArgValues}
            stateKey={`template_function.${templateFunction.data.name}`}
          />
        )}
      </div>
      <div className="px-6 border-t border-t-border pt-3 pb-6 bg-surface-highlight w-full flex flex-col gap-4">
        {previewType !== "none" ? (
          <div className="w-full grid grid-cols-1 grid-rows-[auto_auto]">
            <HStack space={0.5}>
              <HStack className="text-sm text-text-subtle" space={1.5}>
                Rendered Preview
                {rendered.isLoading && <LoadingIcon size="xs" />}
              </HStack>
              <IconButton
                size="xs"
                iconSize="sm"
                icon={showSecretsInPreview ? "lock" : "lock_open"}
                title={showSecretsInPreview ? "Show preview" : "Hide preview"}
                onClick={toggleShowSecretsInPreview}
                className={classNames(
                  "ml-auto text-text-subtlest",
                  !dataContainsSecrets && "invisible",
                )}
              />
            </HStack>
            <div className="relative w-full max-h-[10rem]">
              <InlineCode
                className={classNames(
                  "block whitespace-pre-wrap !select-text cursor-text max-h-[10rem] overflow-auto hide-scrollbars !border-text-subtlest",
                  tooLarge && "italic text-danger",
                )}
              >
                {rendered.error || tagText.error ? (
                  <em className="text-danger">
                    {`${rendered.error || tagText.error}`.replace(/^Render Error: /, "")}
                  </em>
                ) : dataContainsSecrets && !showSecretsInPreview ? (
                  <span className="italic text-text-subtle">
                    ------ sensitive values hidden ------
                  </span>
                ) : tooLarge ? (
                  "too large to preview"
                ) : (
                  rendered.data || <>&nbsp;</>
                )}
              </InlineCode>
              <div className="absolute right-0.5 top-0 bottom-0 flex items-center">
                <IconButton
                  size="xs"
                  icon="refresh"
                  className="text-text-subtle"
                  title="Refresh preview"
                  spin={rendered.isPending}
                  onClick={() => {
                    setRenderKey(new Date().toISOString());
                  }}
                />
              </div>
            </div>
          </div>
        ) : (
          <span />
        )}
        <div className="flex justify-stretch w-full flex-grow gap-2 [&>*]:flex-1">
          {templateFunction.data.name === "secure" && (
            <Button variant="border" color="secondary" onClick={setupOrConfigureEncryption}>
              Reveal Encryption Key
            </Button>
          )}
          <Button type="submit" color="primary">
            Save
          </Button>
        </div>
      </div>
    </form>
  );
}

TemplateFunctionDialog.show = (
  fn: TemplateFunction,
  tagValue: string,
  startPos: number,
  view: EditorView,
) => {
  const initialTokens = parseTemplate(tagValue);
  showDialog({
    id: `template-function-${Math.random()}`, // Allow multiple at once
    size: "md",
    className: "h-[60rem]",
    noPadding: true,
    title: <InlineCode>{fn.name}(…)</InlineCode>,
    description: fn.description,
    render: ({ hide }) => {
      const model = jotaiStore.get(activeWorkspaceAtom);
      if (model == null) return null;
      return (
        <TemplateFunctionDialog
          templateFunction={fn}
          model={model}
          hide={hide}
          initialTokens={initialTokens}
          onChange={(insert) => {
            view.dispatch({
              changes: [{ from: startPos, to: startPos + tagValue.length, insert }],
            });
          }}
        />
      );
    },
  });
};