import { StateUpdater } from "preact/hooks";
import { ChatStore } from "./app";

const Help = (props: { children: any; help: string }) => {
  return (
    <div>
      <button
        className="absolute"
        onClick={() => {
          alert(props.help);
        }}
      >
        ❓
      </button>
      <p className="flex justify-between">{props.children}</p>
    </div>
  );
};

const Input = (props: {
  chatStore: ChatStore;
  setChatStore: (cs: ChatStore) => void;
  field: "apiKey" | "systemMessageContent" | "apiEndpoint";
  help: string;
}) => {
  return (
    <Help help={props.help}>
      <label className="m-2 p-2">{props.field}</label>
      <input
        className="m-2 p-2 border rounded focus w-32 md:w-fit"
        value={props.chatStore[props.field]}
        onChange={(event: any) => {
          props.chatStore[props.field] = event.target.value;
          props.setChatStore({ ...props.chatStore });
        }}
      ></input>
    </Help>
  );
};
const Number = (props: {
  chatStore: ChatStore;
  setChatStore: (cs: ChatStore) => void;
  field: "totalTokens" | "maxTokens" | "tokenMargin" | "postBeginIndex";
  readOnly: boolean;
  help: string;
}) => {
  return (
    <Help help={props.help}>
      <label className="m-2 p-2">{props.field}</label>
      <input
        readOnly={props.readOnly}
        type="number"
        className="m-2 p-2 border rounded focus w-28"
        value={props.chatStore[props.field]}
        onChange={(event: any) => {
          console.log("type", typeof event.target.value);
          let newNumber = parseInt(event.target.value);
          if (newNumber < 0) newNumber = 0;
          props.chatStore[props.field] = newNumber;
          props.setChatStore({ ...props.chatStore });
        }}
      ></input>
    </Help>
  );
};
const Choice = (props: {
  chatStore: ChatStore;
  setChatStore: (cs: ChatStore) => void;
  field: "streamMode";
  help: string;
}) => {
  return (
    <Help help={props.help}>
      <label className="m-2 p-2">{props.field}</label>
      <input
        type="checkbox"
        className="m-2 p-2 border rounded focus"
        checked={props.chatStore[props.field]}
        onChange={(event: any) => {
          props.chatStore[props.field] = event.target.checked;
          props.setChatStore({ ...props.chatStore });
        }}
      ></input>
    </Help>
  );
};

export default (props: {
  chatStore: ChatStore;
  setChatStore: (cs: ChatStore) => void;
  show: boolean;
  setShow: StateUpdater<boolean>;
}) => {
  if (!props.show) return <div></div>;
  const link =
    location.protocol +
    "//" +
    location.host +
    location.pathname +
    `?key=${encodeURIComponent(
      props.chatStore.apiKey
    )}&api=${encodeURIComponent(props.chatStore.apiEndpoint)}&mode=${
      props.chatStore.streamMode ? "stream" : "fetch"
    }&sys=${encodeURIComponent(props.chatStore.systemMessageContent)}`;
  return (
    <div className="left-0 top-0 overflow-scroll flex justify-center absolute w-screen h-screen bg-black bg-opacity-50 z-10">
      <div className="m-2 p-2 bg-white rounded-lg h-fit">
        <h3 className="text-xl">Settings</h3>
        <hr />
        <div className="box">
          <Input
            field="systemMessageContent"
            help="系统消息，用于指示ChatGPT的角色和一些前置条件"
            {...props}
          />
          <Input field="apiKey" help="OPEN AI API 密钥" {...props} />
          <Input
            field="apiEndpoint"
            help="API 端点，方便在不支持的地区使用反向代理服务"
            {...props}
          />
          <Choice
            field="streamMode"
            help="流模式，使用 stream mode 将可以动态看到生成内容，但无法准确计算 token 数量，在 token 数量过多时可能会裁切过多或过少历史消息"
            {...props}
          />
          <Number
            field="maxTokens"
            help="最大 token 数量，这个详情参考 OPENAI API 文档"
            readOnly={false}
            {...props}
          />
          <Number
            field="tokenMargin"
            help="当 totalTokens > maxTokens - tokenMargin 时会触发历史消息裁切，chatgpt会“忘记”一部分对话中的消息（但所有历史消息仍然保存在本地）"
            readOnly={false}
            {...props}
          />
          <Number
            field="postBeginIndex"
            help="指示发送 API 请求时要”忘记“多少历史消息"
            readOnly={false}
            {...props}
          />
          <Number
            field="totalTokens"
            help="token总数，每次对话都会更新此参数，stream模式下该参数为估计值"
            readOnly={true}
            {...props}
          />
        </div>
        <hr />
        <div className="flex justify-between">
          <button
            className="p-2 m-2 rounded bg-purple-600 text-white"
            onClick={() => {
              navigator.clipboard.writeText(link);
              alert(`Copied link: ${link}`);
            }}
          >
            Copy Link
          </button>
          <button
            className="p-2 m-2 rounded bg-rose-600 text-white"
            onClick={() => {
              if (
                !confirm(
                  `Are you sure to clear all ${props.chatStore.history.length} messages?`
                )
              )
                return;
              props.chatStore.history = [];
              props.chatStore.postBeginIndex = 0;
              props.chatStore.totalTokens = 0;
              props.setChatStore({ ...props.chatStore });
            }}
          >
            Clear History
          </button>
          <button
            className="p-2 m-2 rounded bg-cyan-600 text-white"
            onClick={() => {
              props.setShow(false);
            }}
          >
            Close
          </button>
        </div>
      </div>
    </div>
  );
};