import styled from "styled-components";
import {
  defaultBorderRadius,
  vscBackground,
  Loader,
  MainTextInput,
  HeaderButton,
} from "../components";
import ContinueButton from "../components/ContinueButton";
import { useCallback, useEffect, useRef, useState } from "react";
import { History } from "../../../schema/History";
import { HistoryNode } from "../../../schema/HistoryNode";
import StepContainer from "../components/StepContainer";
import useContinueGUIProtocol from "../hooks/useWebsocket";
import { Trash } from "@styled-icons/heroicons-outline";
let TopGUIDiv = styled.div`
  display: grid;
  grid-template-columns: 1fr;
  background-color: ${vscBackground};
`;

let UserInputQueueItem = styled.div`
  border-radius: ${defaultBorderRadius};
  color: gray;
  padding: 8px;
  margin: 8px;
  text-align: center;
`;

const TopBar = styled.div`
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  padding: 8px;
  align-items: center;
`;

interface GUIProps {
  firstObservation?: any;
}

function GUI(props: GUIProps) {
  const [waitingForSteps, setWaitingForSteps] = useState(false);
  const [userInputQueue, setUserInputQueue] = useState<string[]>([]);
  const [history, setHistory] = useState<History | undefined>({
    timeline: [
      {
        step: {
          name: "Waiting for user input",
          cmd: "python3 /Users/natesesti/Desktop/continue/extension/examples/python/main.py",
          description:
            "Run `python3 /Users/natesesti/Desktop/continue/extension/examples/python/main.py` and ```\nprint(sum(first, second))\n```\n- Testing\n- Testing 2\n- Testing 3",
        },
        observation: {
          title: "ERROR FOUND",
          error:
            "Traceback (most recent call last):\n  File \"/Users/natesesti/Desktop/continue/extension/examples/python/main.py\", line 7, in <module>\n    print(sum(first, second))\n          ^^^^^^^^^^^^^^^^^^\n  File \"/Users/natesesti/Desktop/continue/extension/examples/python/sum.py\", line 2, in sum\n    return a + b\n           ~~^~~\nTypeError: unsupported operand type(s) for +: 'int' and 'str'",
        },
        output: [
          {
            traceback: {
              frames: [
                {
                  filepath:
                    "/Users/natesesti/Desktop/continue/extension/examples/python/main.py",
                  lineno: 7,
                  function: "<module>",
                  code: "print(sum(first, second))",
                },
              ],
              message: "unsupported operand type(s) for +: 'int' and 'str'",
              error_type:
                '          ^^^^^^^^^^^^^^^^^^\n  File "/Users/natesesti/Desktop/continue/extension/examples/python/sum.py", line 2, in sum\n    return a + b\n           ~~^~~\nTypeError',
              full_traceback:
                "Traceback (most recent call last):\n  File \"/Users/natesesti/Desktop/continue/extension/examples/python/main.py\", line 7, in <module>\n    print(sum(first, second))\n          ^^^^^^^^^^^^^^^^^^\n  File \"/Users/natesesti/Desktop/continue/extension/examples/python/sum.py\", line 2, in sum\n    return a + b\n           ~~^~~\nTypeError: unsupported operand type(s) for +: 'int' and 'str'",
            },
          },
          null,
        ],
      },
      {
        step: {
          name: "EditCodeStep",
          range_in_files: [
            {
              filepath:
                "/Users/natesesti/Desktop/continue/extension/examples/python/main.py",
              range: {
                start: {
                  line: 0,
                  character: 0,
                },
                end: {
                  line: 6,
                  character: 25,
                },
              },
            },
          ],
          prompt:
            "I ran into this problem with my Python code:\n\n                Traceback (most recent call last):\n  File \"/Users/natesesti/Desktop/continue/extension/examples/python/main.py\", line 7, in <module>\n    print(sum(first, second))\n          ^^^^^^^^^^^^^^^^^^\n  File \"/Users/natesesti/Desktop/continue/extension/examples/python/sum.py\", line 2, in sum\n    return a + b\n           ~~^~~\nTypeError: unsupported operand type(s) for +: 'int' and 'str'\n\n                Below are the files that might need to be fixed:\n\n                {code}\n\n                This is what the code should be in order to avoid the problem:\n",
          description:
            "Run `python3 /Users/natesesti/Desktop/continue/extension/examples/python/main.py` and\n```python\nprint(sum(first, second))\n```\n- Testing\n- Testing 2\n- Testing 3",
        },
        output: [
          null,
          {
            reversible: true,
            actions: [
              {
                reversible: true,
                filesystem: {},
                filepath:
                  "/Users/natesesti/Desktop/continue/extension/examples/python/main.py",
                range: {
                  start: {
                    line: 0,
                    character: 0,
                  },
                  end: {
                    line: 6,
                    character: 25,
                  },
                },
                replacement:
                  "\nfrom sum import sum\n\nfirst = 1\nsecond = 2\n\nprint(sum(first, second))",
              },
            ],
          },
        ],
      },
      {
        step: {
          name: "SolveTracebackStep",
          traceback: {
            frames: [
              {
                filepath:
                  "/Users/natesesti/Desktop/continue/extension/examples/python/main.py",
                lineno: 7,
                function: "<module>",
                code: "print(sum(first, second))",
              },
            ],
            message: "unsupported operand type(s) for +: 'int' and 'str'",
            error_type:
              '          ^^^^^^^^^^^^^^^^^^\n  File "/Users/natesesti/Desktop/continue/extension/examples/python/sum.py", line 2, in sum\n    return a + b\n           ~~^~~\nTypeError',
            full_traceback:
              "Traceback (most recent call last):\n  File \"/Users/natesesti/Desktop/continue/extension/examples/python/main.py\", line 7, in <module>\n    print(sum(first, second))\n          ^^^^^^^^^^^^^^^^^^\n  File \"/Users/natesesti/Desktop/continue/extension/examples/python/sum.py\", line 2, in sum\n    return a + b\n           ~~^~~\nTypeError: unsupported operand type(s) for +: 'int' and 'str'",
          },
          description: "Running step: SolveTracebackStep",
        },
        output: [null, null],
      },
      {
        step: {
          name: "RunCodeStep",
          cmd: "python3 /Users/natesesti/Desktop/continue/extension/examples/python/main.py",
          description:
            "Run `python3 /Users/natesesti/Desktop/continue/extension/examples/python/main.py`",
        },
        output: [null, null],
      },
    ],
    current_index: 3,
  } as any);

  const topGuiDivRef = useRef<HTMLDivElement>(null);
  const client = useContinueGUIProtocol();

  const [scrollTimeout, setScrollTimeout] = useState<NodeJS.Timeout | null>(
    null
  );
  const scrollToBottom = useCallback(() => {
    if (scrollTimeout) {
      clearTimeout(scrollTimeout);
    }
    // Debounced smooth scroll to bottom of screen
    if (topGuiDivRef.current) {
      const timeout = setTimeout(() => {
        window.scrollTo({
          top: window.outerHeight,
          behavior: "smooth",
        });
      }, 200);
      setScrollTimeout(timeout);
    }
  }, [topGuiDivRef.current, scrollTimeout]);

  useEffect(() => {
    console.log("CLIENT ON STATE UPDATE: ", client, client?.onStateUpdate);
    client?.onStateUpdate((state) => {
      console.log("Received state update: ", state);
      setWaitingForSteps(state.active);
      setHistory(state.history);
      setUserInputQueue(state.user_input_queue);

      scrollToBottom();
    });
  }, [client]);

  useEffect(() => {
    scrollToBottom();
  }, [waitingForSteps]);

  const mainTextInputRef = useRef<HTMLTextAreaElement>(null);

  useEffect(() => {
    if (mainTextInputRef.current) {
      mainTextInputRef.current.focus();
      let handler = (event: any) => {
        if (event.data.type === "focusContinueInput") {
          mainTextInputRef.current?.focus();
        }
      };
      window.addEventListener("message", handler);
      return () => {
        window.removeEventListener("message", handler);
      };
    }
  }, [mainTextInputRef]);

  const onMainTextInput = () => {
    if (mainTextInputRef.current) {
      if (!client) return;
      let input = mainTextInputRef.current.value;

      if (
        history &&
        history.timeline[history.current_index].step.name ===
          "Waiting for user input"
      ) {
        if (input.trim() === "") return;
        onStepUserInput(input, history!.current_index);
      } else if (
        history &&
        history.timeline[history.current_index].step.name ===
          "Waiting for user confirmation"
      ) {
        onStepUserInput("ok", history!.current_index);
      } else {
        if (input.trim() === "") return;

        client.sendMainInput(input);
        setUserInputQueue((queue) => {
          return [...queue, input];
        });
      }
      mainTextInputRef.current.value = "";
      mainTextInputRef.current.style.height = "";
    }

    setWaitingForSteps(true);
  };

  const onStepUserInput = (input: string, index: number) => {
    if (!client) return;
    console.log("Sending step user input", input, index);
    client.sendStepUserInput(input, index);
  };

  // const iterations = useSelector(selectIterations);
  return (
    <TopGUIDiv
      ref={topGuiDivRef}
      onKeyDown={(e) => {
        if (e.key === "Enter" && e.ctrlKey) {
          onMainTextInput();
        }
      }}
    >
      <TopBar>
        <h3>Continue</h3>
        <HeaderButton style={{ padding: "3px" }}>
          Clear History
          <Trash
            size="1.6em"
            onClick={() => {
              client?.sendClear();
            }}
          />
        </HeaderButton>
      </TopBar>

      {typeof client === "undefined" && (
        <>
          <Loader></Loader>
          <p style={{ textAlign: "center" }}>
            Trying to reconnect with server...
          </p>
        </>
      )}
      {history?.timeline.map((node: HistoryNode, index: number) => {
        return (
          <StepContainer
            key={index}
            onUserInput={(input: string) => {
              onStepUserInput(input, index);
            }}
            inFuture={index > history?.current_index}
            historyNode={node}
            onRefinement={(input: string) => {
              client?.sendRefinementInput(input, index);
            }}
            onReverse={() => {
              client?.reverseToIndex(index);
            }}
            onRetry={() => {
              client?.retryAtIndex(index);
              setWaitingForSteps(true);
            }}
            onDelete={() => {
              client?.deleteAtIndex(index);
            }}
          />
        );
      })}
      {waitingForSteps && <Loader></Loader>}

      <div>
        {userInputQueue.map((input) => {
          return <UserInputQueueItem>{input}</UserInputQueueItem>;
        })}
      </div>

      <MainTextInput
        disabled={
          history
            ? history.timeline[history.current_index].step.name ===
              "Waiting for user confirmation"
            : false
        }
        ref={mainTextInputRef}
        onKeyDown={(e) => {
          if (e.key === "Enter") {
            onMainTextInput();
            e.stopPropagation();
            e.preventDefault();
          }
        }}
        rows={1}
        onChange={() => {
          const textarea = mainTextInputRef.current!;
          textarea.style.height = ""; /* Reset the height*/
          textarea.style.height = `${Math.min(
            textarea.scrollHeight - 15,
            500
          )}px`;
        }}
      />
      <ContinueButton onClick={onMainTextInput} />
    </TopGUIDiv>
  );
}

export default GUI;