import { type GrpcRequest, type HttpRequestHeader, patchModel } from "@yaakapp-internal/models";
import classNames from "classnames";
import type { CSSProperties } from "react";
import { useCallback, useMemo, useRef } from "react";
import { useAuthTab } from "../hooks/useAuthTab";
import { useContainerSize } from "../hooks/useContainerQuery";
import type { ReflectResponseService } from "../hooks/useGrpc";
import { useHeadersTab } from "../hooks/useHeadersTab";
import { useInheritedHeaders } from "../hooks/useInheritedHeaders";
import { useRequestUpdateKey } from "../hooks/useRequestUpdateKey";
import { resolvedModelName } from "../lib/resolvedModelName";
import { Button } from "./core/Button";
import { CountBadge } from "./core/CountBadge";
import { Icon } from "./core/Icon";
import { IconButton } from "./core/IconButton";
import { PlainInput } from "./core/PlainInput";
import { RadioDropdown } from "./core/RadioDropdown";
import { HStack, VStack } from "./core/Stacks";
import type { TabItem } from "./core/Tabs/Tabs";
import { TabContent, Tabs } from "./core/Tabs/Tabs";
import { GrpcEditor } from "./GrpcEditor";
import { HeadersEditor } from "./HeadersEditor";
import { HttpAuthenticationEditor } from "./HttpAuthenticationEditor";
import { MarkdownEditor } from "./MarkdownEditor";
import { UrlBar } from "./UrlBar";

interface Props {
  style?: CSSProperties;
  className?: string;
  activeRequest: GrpcRequest;
  protoFiles: string[];
  reflectionError?: string;
  reflectionLoading?: boolean;
  methodType:
    | "unary"
    | "client_streaming"
    | "server_streaming"
    | "streaming"
    | "no-schema"
    | "no-method";
  isStreaming: boolean;
  onCommit: () => void;
  onCancel: () => void;
  onSend: (v: { message: string }) => void;
  onGo: () => void;
  services: ReflectResponseService[] | null;
}

const TAB_MESSAGE = "message";
const TAB_METADATA = "metadata";
const TAB_AUTH = "auth";
const TAB_DESCRIPTION = "description";

export function GrpcRequestPane({
  style,
  services,
  methodType,
  activeRequest,
  protoFiles,
  reflectionError,
  reflectionLoading,
  isStreaming,
  onGo,
  onCommit,
  onCancel,
  onSend,
}: Props) {
  const authTab = useAuthTab(TAB_AUTH, activeRequest);
  const metadataTab = useHeadersTab(TAB_METADATA, activeRequest, "Metadata");
  const inheritedHeaders = useInheritedHeaders(activeRequest);
  const forceUpdateKey = useRequestUpdateKey(activeRequest.id ?? null);

  const urlContainerEl = useRef<HTMLDivElement>(null);
  const { width: paneWidth } = useContainerSize(urlContainerEl);

  const handleChangeUrl = useCallback(
    (url: string) => patchModel(activeRequest, { url }),
    [activeRequest],
  );

  const handleChangeMessage = useCallback(
    (message: string) => patchModel(activeRequest, { message }),
    [activeRequest],
  );

  const select = useMemo(() => {
    const options =
      services?.flatMap((s) =>
        s.methods.map((m) => ({
          label: `${s.name.split(".").pop() ?? s.name}/${m.name}`,
          value: `${s.name}/${m.name}`,
        })),
      ) ?? [];
    const value = `${activeRequest?.service ?? ""}/${activeRequest?.method ?? ""}`;
    return { value, options };
  }, [activeRequest?.method, activeRequest?.service, services]);

  const handleChangeService = useCallback(
    async (v: string) => {
      const [serviceName, methodName] = v.split("/", 2);
      if (serviceName == null || methodName == null) throw new Error("Should never happen");
      await patchModel(activeRequest, {
        service: serviceName,
        method: methodName,
      });
    },
    [activeRequest],
  );

  const handleConnect = useCallback(async () => {
    if (activeRequest == null) return;

    if (activeRequest.service == null || activeRequest.method == null) {
      alert({
        id: "grpc-invalid-service-method",
        title: "Error",
        body: "Service or method not selected",
      });
    }
    onGo();
  }, [activeRequest, onGo]);

  const handleSend = useCallback(async () => {
    if (activeRequest == null) return;
    onSend({ message: activeRequest.message });
  }, [activeRequest, onSend]);

  const tabs: TabItem[] = useMemo(
    () => [
      { value: TAB_MESSAGE, label: "Message" },
      ...metadataTab,
      ...authTab,
      {
        value: TAB_DESCRIPTION,
        label: "Info",
        rightSlot: activeRequest.description && <CountBadge count={true} />,
      },
    ],
    [activeRequest.description, authTab, metadataTab],
  );

  const handleMetadataChange = useCallback(
    (metadata: HttpRequestHeader[]) => patchModel(activeRequest, { metadata }),
    [activeRequest],
  );

  const handleDescriptionChange = useCallback(
    (description: string) => patchModel(activeRequest, { description }),
    [activeRequest],
  );

  return (
    <VStack style={style}>
      <div
        ref={urlContainerEl}
        className={classNames(
          "grid grid-cols-[minmax(0,1fr)_auto] gap-1.5",
          paneWidth === 0 && "opacity-0",
          paneWidth > 0 && paneWidth < 400 && "!grid-cols-1",
        )}
      >
        <UrlBar
          key={forceUpdateKey}
          url={activeRequest.url ?? ""}
          submitIcon={null}
          forceUpdateKey={forceUpdateKey}
          placeholder="localhost:50051"
          onSend={handleConnect}
          onUrlChange={handleChangeUrl}
          onCancel={onCancel}
          isLoading={isStreaming}
          stateKey={`grpc_url.${activeRequest.id}`}
        />
        <HStack space={1.5}>
          <RadioDropdown
            value={select.value}
            onChange={handleChangeService}
            items={select.options.map((o) => ({
              label: o.label,
              value: o.value,
              type: "default",
              shortLabel: o.label,
            }))}
            itemsAfter={[
              {
                label: "Refresh",
                type: "default",
                leftSlot: <Icon size="sm" icon="refresh" />,
              },
            ]}
          >
            <Button
              size="sm"
              variant="border"
              rightSlot={<Icon size="sm" icon="chevron_down" />}
              disabled={isStreaming || services == null}
              className={classNames(
                "font-mono text-editor min-w-[5rem] !ring-0",
                paneWidth < 400 && "flex-1",
              )}
            >
              {select.options.find((o) => o.value === select.value)?.label ?? "No Schema"}
            </Button>
          </RadioDropdown>
          {methodType === "client_streaming" || methodType === "streaming" ? (
            <>
              {isStreaming && (
                <>
                  <IconButton
                    variant="border"
                    size="sm"
                    title="Cancel"
                    onClick={onCancel}
                    icon="x"
                  />
                  <IconButton
                    variant="border"
                    size="sm"
                    title="Commit"
                    onClick={onCommit}
                    icon="check"
                  />
                </>
              )}
              <IconButton
                size="sm"
                variant="border"
                title={isStreaming ? "Connect" : "Send"}
                hotkeyAction="request.send"
                onClick={isStreaming ? handleSend : handleConnect}
                icon={isStreaming ? "send_horizontal" : "arrow_up_down"}
              />
            </>
          ) : (
            <IconButton
              size="sm"
              variant="border"
              title={methodType === "unary" ? "Send" : "Connect"}
              hotkeyAction="request.send"
              onClick={isStreaming ? onCancel : handleConnect}
              disabled={methodType === "no-schema" || methodType === "no-method"}
              icon={
                isStreaming
                  ? "x"
                  : methodType.includes("streaming")
                    ? "arrow_up_down"
                    : "send_horizontal"
              }
            />
          )}
        </HStack>
      </div>
      <Tabs
        label="Request"
        tabs={tabs}
        tabListClassName="mt-1 !mb-1.5"
        storageKey="grpc_request_tabs"
        activeTabKey={activeRequest.id}
      >
        <TabContent value="message">
          <GrpcEditor
            onChange={handleChangeMessage}
            forceUpdateKey={forceUpdateKey}
            services={services}
            reflectionError={reflectionError}
            reflectionLoading={reflectionLoading}
            request={activeRequest}
            protoFiles={protoFiles}
          />
        </TabContent>
        <TabContent value={TAB_AUTH}>
          <HttpAuthenticationEditor model={activeRequest} />
        </TabContent>
        <TabContent value={TAB_METADATA}>
          <HeadersEditor
            inheritedHeaders={inheritedHeaders}
            forceUpdateKey={forceUpdateKey}
            headers={activeRequest.metadata}
            stateKey={`headers.${activeRequest.id}`}
            onChange={handleMetadataChange}
          />
        </TabContent>
        <TabContent value={TAB_DESCRIPTION}>
          <div className="grid grid-rows-[auto_minmax(0,1fr)] h-full">
            <PlainInput
              label="Request Name"
              hideLabel
              forceUpdateKey={forceUpdateKey}
              defaultValue={activeRequest.name}
              className="font-sans !text-xl !px-0"
              containerClassName="border-0"
              placeholder={resolvedModelName(activeRequest)}
              onChange={(name) => patchModel(activeRequest, { name })}
            />
            <MarkdownEditor
              name="request-description"
              placeholder="Request description"
              defaultValue={activeRequest.description}
              stateKey={`description.${activeRequest.id}`}
              onChange={handleDescriptionChange}
            />
          </div>
        </TabContent>
      </Tabs>
    </VStack>
  );
}