import type { HttpRequest } from "@yaakapp-internal/models";

import { useAtom } from "jotai";
import { useCallback, useMemo } from "react";
import { useLocalStorage } from "react-use";
import { useIntrospectGraphQL } from "../../hooks/useIntrospectGraphQL";
import { useStateWithDeps } from "../../hooks/useStateWithDeps";
import { showDialog } from "../../lib/dialog";
import { Banner } from "../core/Banner";
import { Button } from "../core/Button";
import type { DropdownItem } from "../core/Dropdown";
import { Dropdown } from "../core/Dropdown";
import type { EditorProps } from "../core/Editor/Editor";
import { Editor } from "../core/Editor/LazyEditor";
import { FormattedError } from "../core/FormattedError";
import { Icon } from "../core/Icon";
import { Separator } from "../core/Separator";
import { tryFormatGraphql } from "../../lib/formatters";
import { showGraphQLDocExplorerAtom } from "./graphqlAtoms";

type Props = Pick<EditorProps, "heightMode" | "className" | "forceUpdateKey"> & {
  baseRequest: HttpRequest;
  onChange: (body: HttpRequest["body"]) => void;
  request: HttpRequest;
};

export function GraphQLEditor(props: Props) {
  // There's some weirdness with stale onChange being called when switching requests, so we'll
  // key on the request ID as a workaround for now.
  return <GraphQLEditorInner key={props.request.id} {...props} />;
}

function GraphQLEditorInner({ request, onChange, baseRequest, ...extraEditorProps }: Props) {
  const [autoIntrospectDisabled, setAutoIntrospectDisabled] = useLocalStorage<
    Record<string, boolean>
  >("graphQLAutoIntrospectDisabled", {});
  const { schema, isLoading, error, refetch, clear } = useIntrospectGraphQL(baseRequest, {
    disabled: autoIntrospectDisabled?.[baseRequest.id],
  });
  const [currentBody, setCurrentBody] = useStateWithDeps<{
    query: string;
    variables: string | undefined;
  }>(() => {
    // Migrate text bodies to GraphQL format
    // NOTE: This is how GraphQL used to be stored
    if ("text" in request.body) {
      const b = tryParseJson(request.body.text, {});
      const variables = JSON.stringify(b.variables || undefined, null, 2);
      return { query: b.query ?? "", variables };
    }

    return { query: request.body.query ?? "", variables: request.body.variables ?? "" };
  }, [extraEditorProps.forceUpdateKey]);

  const [isDocOpenRecord, setGraphqlDocStateAtomValue] = useAtom(showGraphQLDocExplorerAtom);
  const isDocOpen = isDocOpenRecord[request.id] !== undefined;

  const handleChangeQuery = useCallback(
    (query: string) => {
      setCurrentBody(({ variables }) => {
        const newBody = { query, variables };
        onChange(newBody);
        return newBody;
      });
    },
    [onChange, setCurrentBody],
  );

  const handleChangeVariables = useCallback(
    (variables: string) => {
      setCurrentBody(({ query }) => {
        const newBody = { query, variables: variables || undefined };
        onChange(newBody);
        return newBody;
      });
    },
    [onChange, setCurrentBody],
  );

  const actions = useMemo<EditorProps["actions"]>(
    () => [
      <div key="actions" className="flex flex-row !opacity-100 !shadow">
        <div key="introspection" className="!opacity-100">
          {schema === undefined ? null /* Initializing */ : (
            <Dropdown
              items={[
                ...((schema != null
                  ? [
                      {
                        label: "Clear",
                        onSelect: clear,
                        color: "danger",
                        leftSlot: <Icon icon="trash" />,
                      },
                      { type: "separator" },
                    ]
                  : []) satisfies DropdownItem[]),
                {
                  hidden: !error,
                  label: (
                    <Banner color="danger">
                      <p className="mb-1">Schema introspection failed</p>
                      <Button
                        size="xs"
                        color="danger"
                        variant="border"
                        onClick={() => {
                          showDialog({
                            title: "Introspection Failed",
                            size: "sm",
                            id: "introspection-failed",
                            render: ({ hide }) => (
                              <>
                                <FormattedError>{error ?? "unknown"}</FormattedError>
                                <div className="w-full my-4">
                                  <Button
                                    onClick={async () => {
                                      hide();
                                      await refetch();
                                    }}
                                    className="ml-auto"
                                    color="primary"
                                    size="sm"
                                  >
                                    Retry Request
                                  </Button>
                                </div>
                              </>
                            ),
                          });
                        }}
                      >
                        View Error
                      </Button>
                    </Banner>
                  ),
                  type: "content",
                },
                {
                  hidden: schema == null,
                  label: `${isDocOpen ? "Hide" : "Show"} Documentation`,
                  leftSlot: <Icon icon="book_open_text" />,
                  onSelect: () => {
                    setGraphqlDocStateAtomValue((v) => ({
                      ...v,
                      [request.id]: isDocOpen ? undefined : null,
                    }));
                  },
                },
                {
                  label: "Introspect Schema",
                  leftSlot: <Icon icon="refresh" spin={isLoading} />,
                  keepOpenOnSelect: true,
                  onSelect: refetch,
                },
                { type: "separator", label: "Setting" },
                {
                  label: "Automatic Introspection",
                  keepOpenOnSelect: true,
                  onSelect: () => {
                    setAutoIntrospectDisabled({
                      ...autoIntrospectDisabled,
                      [baseRequest.id]: !autoIntrospectDisabled?.[baseRequest.id],
                    });
                  },
                  leftSlot: (
                    <Icon
                      icon={
                        autoIntrospectDisabled?.[baseRequest.id]
                          ? "check_square_unchecked"
                          : "check_square_checked"
                      }
                    />
                  ),
                },
              ]}
            >
              <Button
                size="sm"
                variant="border"
                title="Refetch Schema"
                isLoading={isLoading}
                color={error ? "danger" : "default"}
                forDropdown
              >
                {error ? "Introspection Failed" : schema ? "Schema" : "No Schema"}
              </Button>
            </Dropdown>
          )}
        </div>
      </div>,
    ],
    [
      schema,
      clear,
      error,
      isDocOpen,
      isLoading,
      refetch,
      autoIntrospectDisabled,
      baseRequest.id,
      setGraphqlDocStateAtomValue,
      request.id,
      setAutoIntrospectDisabled,
    ],
  );

  return (
    <div className="h-full w-full grid grid-cols-1 grid-rows-[minmax(0,100%)_auto]">
      <Editor
        language="graphql"
        heightMode="auto"
        graphQLSchema={schema}
        format={tryFormatGraphql}
        defaultValue={currentBody.query}
        onChange={handleChangeQuery}
        placeholder="..."
        actions={actions}
        stateKey={`graphql_body.${request.id}`}
        {...extraEditorProps}
      />
      <div className="grid grid-rows-[auto_minmax(0,1fr)] grid-cols-1 min-h-[5rem]">
        <Separator dashed className="pb-1">
          Variables
        </Separator>
        <Editor
          language="json"
          heightMode="auto"
          defaultValue={currentBody.variables}
          onChange={handleChangeVariables}
          placeholder="{}"
          stateKey={`graphql_vars.${request.id}`}
          autocompleteFunctions
          autocompleteVariables
          {...extraEditorProps}
        />
      </div>
    </div>
  );
}

function tryParseJson(text: string, fallback: unknown) {
  try {
    return JSON.parse(text);
  } catch {
    return fallback;
  }
}