import React, { useState, useEffect, useRef } from "react";
import { Link, useLocation, useNavigate } from "react-router-dom";
import Modal from "react-modal";
import { deleteAccount, deleteCaches, exportAccount, importAccount, setAccount, setActiveAccount, useAccount, useAccounts, useResolvedAuthorAddress } from "@plebbit/plebbit-react-hooks";
import { StyledModal } from "../styled/modals/SettingsModal.styled";
import useError from "../../hooks/useError";
import useSuccess from "../../hooks/useSuccess";
import useAnonModeStore from '../../hooks/stores/useAnonModeStore';
import useGeneralStore from '../../hooks/stores/useGeneralStore';
import packageJson from '../../../package.json';
const {version} = packageJson;


const SettingsModal = ({ isOpen, closeModal }) => {
  const {
    selectedStyle,
  } = useGeneralStore(state => state);
  
  const { anonymousMode, setAnonymousMode } = useAnonModeStore();

  const navigate = useNavigate();
  const location = useLocation();
  const [expanded, setExpanded] = useState([]);
  const [accountJson, setAccountJson] = useState("");
  const [copyStatus, setCopyStatus] = useState(false);
  const [ensName, setEnsName] = useState('');
  const [checkedENS, setCheckedENS] = useState(false);

  const [, setNewErrorMessage] = useError();
  const [, setNewSuccessMessage] = useSuccess();

  const account = useAccount();
  const { accounts } = useAccounts();

  const gatewayRef = useRef();
  const ipfsRef = useRef();
  const pubsubRef = useRef();
  const ethereumRpcRef = useRef();
  const polygonRpcRef = useRef();
  const dataPathRef = useRef();
  const importRef = useRef();
  const nameRef = useRef();
  const ensRef = useRef();

  const isElectron = window.electron && window.electron.isElectron;
  const author = {...account?.author, address: ensName};
  const { resolvedAddress, state } = useResolvedAuthorAddress({ author, cache: false });


  const defaultGatewayUrls = isElectron ? undefined : [
    'https://ipfs.io',
    'https://ipfsgateway.xyz',
    'https://cloudflare-ipfs.com',
    'https://plebpubsub.live'
  ];

  const defaultPubsubHttpClientsOptions = isElectron ? undefined : [
    'https://pubsubprovider.xyz/api/v0',
    'https://plebpubsub.live/api/v0'
  ];

  const defaultEthereumRpcUrls = [
    'ethers.js',
    'https://ethrpc.xyz',
    'viem',
  ];

  const defaultPolygonRpcUrls = [
    'https://polygon-rpc.com',
  ];


  useEffect(() => {
    if (account) {
      const fetchAccountData = async () => {
        const data = await exportAccount();
        setAccountJson(data);
      };
    
      fetchAccountData();
    }
  }, [account]);  


  const handleAccountJsonChange = (e) => {
    setAccountJson(e.target.value);
  };
  

  useEffect(() => {
    if (checkedENS && resolvedAddress && state === 'succeeded') {
      setCheckedENS(false);
    }
  }, [checkedENS, state, resolvedAddress]);
  


  const handleENSChange = () => {
    const newEnsName = ensRef.current.value;
    setEnsName(newEnsName);
  };

  const handleENSCheck = () => {
    const newEnsName = ensRef.current.value;
    setEnsName(newEnsName);
    setCheckedENS(true);
  };

  const handleENSSave = async () => {
    if (resolvedAddress === account?.signer?.address) {
      try {
        await setAccount({
          ...account,
          author: {
            ...account?.author,
            address: ensName,
          },
        });
        setNewSuccessMessage("ENS Name Saved");
  
      } catch (error) {
        setNewErrorMessage(error.message);
        console.log(error);
      }
    } else if (resolvedAddress !== account?.signer?.address) {
      setNewErrorMessage(`Failed resolving address, ${ensName}`);
    }
  };


  const isValidURL = (url) => {
    try {
      new URL(url);
      return true;
    } catch {
      return false;
    }
  };


  const handleCopyAddress = async () => {
    try {
      await navigator.clipboard.writeText(account?.author.address);
      setCopyStatus(true);
    } catch (err) {
      console.error('Failed to copy text: ', err);
    }
  };  


  useEffect(() => {
    let copyStatusTimeoutId;
    let checkedENSTimeoutId;
    if (copyStatus) {
      copyStatusTimeoutId = setTimeout(() => setCopyStatus(false), 3000);
    }
    if (checkedENS) {
      checkedENSTimeoutId = setTimeout(() => setCheckedENS(false), 5000);
    }
    return () => {
      clearTimeout(copyStatusTimeoutId); 
      clearTimeout(checkedENSTimeoutId); 
    };
  }, [copyStatus, checkedENS]);
  

  const handleSavePlebbitOptions = async () => {
    let gatewayUrls = gatewayRef.current.value.split('\n').filter((url) => url.trim());
    let ipfsClientsOptions = ipfsRef.current.value.split('\n').filter(url => url.trim());
    let pubsubClientsOptions = pubsubRef.current.value.split('\n').filter((url) => url.trim());
  
    if (!isElectron) {
      if (!gatewayUrls.length) gatewayUrls = defaultGatewayUrls;
      if (!pubsubClientsOptions.length) pubsubClientsOptions = defaultPubsubHttpClientsOptions;
    } else {
      if (!gatewayUrls.length) gatewayUrls = undefined;
      if (!pubsubClientsOptions.length) pubsubClientsOptions = undefined;
    }

    if (!ipfsClientsOptions.length) {
      ipfsClientsOptions = undefined;
    }

    const invalidUrls = [
      ...(Array.isArray(gatewayUrls) ? gatewayUrls : (Array.isArray(defaultGatewayUrls) ? defaultGatewayUrls : [])),
      ...(Array.isArray(ipfsClientsOptions) ? ipfsClientsOptions : []),
      ...(Array.isArray(pubsubClientsOptions) ? pubsubClientsOptions : (Array.isArray(defaultPubsubHttpClientsOptions) ? defaultPubsubHttpClientsOptions : [])),
    ].filter((url) => !isValidURL(url));

    if (invalidUrls.length > 0) {
      setNewErrorMessage(`Invalid URL(s): ${invalidUrls.join(', ')}`);
      return;
    }

    const plebbitOptions = {
      ipfsGatewayUrls: gatewayUrls,
      ipfsHttpClientsOptions: ipfsClientsOptions,
      pubsubHttpClientsOptions: pubsubClientsOptions,
    };

    try {
      await setAccount({ ...account, plebbitOptions });
      localStorage.setItem("successToast", "Settings Saved");
      window.location.reload();
    } catch (error) {
      setNewErrorMessage(error.message); console.log(error);
    }
  };


  const handleSaveChainProviders = async () => {
    let ethereumRpcUrls = ethereumRpcRef.current.value.split('\\n').filter(url => url.trim());
    let polygonRpcUrls = polygonRpcRef.current.value.split('\\n').filter(url => url.trim());
  
    if (!ethereumRpcUrls.length) {
      ethereumRpcUrls = defaultEthereumRpcUrls;
    }
  
    if (!polygonRpcUrls.length) {
      polygonRpcUrls = defaultPolygonRpcUrls;
    }
  
    const invalidUrls = [
      ...ethereumRpcUrls || defaultEthereumRpcUrls,
      ...polygonRpcUrls || defaultPolygonRpcUrls,
    ].filter((url) => !isValidURL(url));
  
    if (invalidUrls.length > 0) {
      setNewErrorMessage(`Invalid URL(s): ${invalidUrls.join(', ')}`);
      return;
    }
  
    const chainProviders = {
      'eth': {
        urls: ethereumRpcUrls,
        chainId: 1,
      },
      'matic': {
        urls: polygonRpcUrls,
        chainId: 137,
      }
    }
  
    try {
      await setAccount({
        ...account,
        plebbitOptions: {
          ...account?.plebbitOptions,
          chainProviders,
        },
      });
      localStorage.setItem("successToast", "Blockchain Options Saved");
      window.location.reload();
    } catch (error) {
      setNewErrorMessage(error.message); console.log(error);
    }
  };
  

  const handleResetPlebbitOptions = async () => {
    setNewErrorMessage(null);
    setNewSuccessMessage(null);

    gatewayRef.current.value = defaultGatewayUrls ? defaultGatewayUrls.join('\n') : "";
    ipfsRef.current.value = "";
    pubsubRef.current.value = defaultPubsubHttpClientsOptions ? defaultPubsubHttpClientsOptions.join('\n') : "";
    dataPathRef.current.value = "";

    try {
      await setAccount({
        ...account,
        plebbitOptions: {
          ipfsGatewayUrls: defaultGatewayUrls,
          ipfsHttpClientsOptions: undefined,
          pubsubHttpClientsOptions: defaultPubsubHttpClientsOptions,
        },
      });
      localStorage.setItem("successToast", "Settings Reset");
      window.location.reload();
    } catch (error) {
      setNewErrorMessage(error.message); console.log(error);
    }
  };


  const handleResetChainProviders = async () => {
    setNewErrorMessage(null);
    setNewSuccessMessage(null);
  
    ethereumRpcRef.current.value = defaultEthereumRpcUrls.join('\n');
    polygonRpcRef.current.value = defaultPolygonRpcUrls.join('\n');
  
    const chainProviders = {
      'eth': {
        urls: defaultEthereumRpcUrls,
        chainId: 1,
      },
      'matic': {
        urls: defaultPolygonRpcUrls,
        chainId: 137,
      }
    }
  
    try {
      await setAccount({
        ...account,
        plebbitOptions: {
          ...account?.plebbitOptions,
          chainProviders,
        },
      });
      localStorage.setItem("successToast", "Blockchain Options Reset");
      window.location.reload();
    } catch (error) {
      setNewErrorMessage(error.message); console.log(error);
    }
  };
  


  const handleCloseModal = () => {
    if (location.pathname.endsWith("/settings")) {
      const newPath = location.pathname.slice(0, -9);
      closeModal();
      navigate(newPath, { replace: true });
    } else {
      closeModal();
    }
  };  


  const toggleExpanded = (index) => {
    setExpanded((prevExpanded) => {
      const newExpanded = [...prevExpanded];
      if (newExpanded.includes(index)) {
        newExpanded.splice(newExpanded.indexOf(index), 1);
      } else {
        newExpanded.push(index);
      }
      return newExpanded;
    });
  };


  const expandAll = () => {
    if (expanded.length === 4) {
      setExpanded([]);
    } else {
      setExpanded([0, 1, 2, 3]);
    }
  };
  
  
  useEffect(() => {
    if (localStorage.getItem("cacheCleared") === "true") {
      setNewSuccessMessage("Cache Cleared");
      localStorage.removeItem("cacheCleared");
    }
  }, [setNewSuccessMessage]);


  const handleSaveAccount = async () => {
    try {
      const parsedJson = JSON.parse(accountJson);
      await setAccount(parsedJson);
      setNewSuccessMessage("Account Data Saved Successfully");
    } catch (error) {
      setNewErrorMessage("Error saving account data: " + error.message);
      console.error(error);
    }
  };


  const handleResetAccount = async () => {
    try {
      const data = await exportAccount();
      setAccountJson(data);
      setNewSuccessMessage("Account Data Reset Successfully");
    } catch (error) {
      setNewErrorMessage("Error resetting account data: " + error.message);
      console.error(error);
    }
  };


  const handleImportAccount = async () => {
    const accountJson = importRef.current.value;

    try {
      const parsedJson = JSON.parse(accountJson);
      await importAccount(accountJson);
      setActiveAccount(parsedJson.account?.name);
      setNewSuccessMessage("Account Imported");
      
    } catch (error) {
      setNewErrorMessage(error.message); console.log(error);
    }
  };


  const handleDeleteAccount = async () => {
    if (window.confirm("Are you sure you want to delete this account?")) {
      try {
        await deleteAccount(account?.name);
        localStorage.setItem("successToast", "Account Deleted Successfully");
        window.location.reload();
      } catch (error) {
        setNewErrorMessage("Error deleting account: " + error.message);
        console.error(error);
      }
    }
  };


  const handleAccountChange = (e) => {
    setActiveAccount(e.target.value);
  };

  const handleDisplayName = async () => {
    const name = nameRef.current.value;

    try {
      await setAccount({ 
        ...account, 
        name: name || account?.name,
        author: {
          ...account?.author,
          displayName: name,
     }});
      setNewSuccessMessage("Account Name Saved");
    } catch (error) {
      setNewErrorMessage(error.message); console.log(error);
    }
  };

  
  return (
    <StyledModal
      isOpen={isOpen}
      onRequestClose={handleCloseModal}
      contentLabel="Settings"
      style={{ overlay: { backgroundColor: "rgba(0,0,0,.25)" }}}
      selectedStyle={selectedStyle}
      expanded={expanded}
    >
      <div className="panel">
        <div className="panel-header">
          <span id="version">
            v{version} -&nbsp;
            {window.electron && window.electron.isElectron ? (
              <Link className="all-button" id="node-stats" to="http://localhost:5001/webui/" target="_blank" rel="noreferrer">
                full node
              </Link>
              ) : (<span>web</span>)
            }
          </span>
          Settings
          <Link to="" onClick={handleCloseModal}>
            <span className="icon" title="close" />
          </Link>
        </div>
        <div className="all-div">
          [
          <button className="all-button" 
          onClick={expandAll} style={{all: "unset", cursor: "pointer"}}>
            {expanded.length === 4 ? "Collapse All Settings" : "Expand All Settings"}
          </button>
          ]
        </div>
        <ul>
          <li className="settings-cat-lbl">
          <span className={`${expanded.includes(1) ? 'minus' : 'plus'}`}
            onClick={() => toggleExpanded(1)}
          />
          <span className="settings-pointer" style={{cursor: "pointer"}}
            onClick={() => toggleExpanded(1)}
          >Account</span>
          </li>
          <ul className="settings-cat" style={{ display: expanded.includes(1) ? 'block' : 'none' }}>
            <li className="anon-off">
              <label title={ !anonymousMode ? 
                "Enable anon mode" : 
                "Disable anon mode"
              }>
                <input 
                  type="checkbox" 
                  checked={anonymousMode} 
                  onChange={() => {setAnonymousMode(!anonymousMode); window.location.reload();}}
                />
                &nbsp;Anon Mode
              </label>
            </li>
            <li className="settings-tip anon-tip">
              Automatically use a different u/address per thread to post.
            </li>
            <li className="settings-option disc">
              Account Data
            </li>
            <li className="settings-tip">
              To save manual changes, click "Save". To undo changes, click "Reset". To delete the account and create a new one, click "Delete". To add another account, paste its data and click "Import".
            </li>
            <div className="settings-input">
              <textarea id="account-data-text" 
              value={accountJson} 
              ref={importRef} 
              onChange={handleAccountJsonChange} />
              <div className="account-buttons">
                <button onClick={handleSaveAccount}>
                  Save
                </button>
                <button onClick={handleResetAccount}>
                  Reset
                </button>
                <button onClick={handleImportAccount}>
                  Import
                </button> 
                <button onClick={handleDeleteAccount}>
                  Delete
                </button>
              </div>
            </div>
            <li className="settings-option disc">
              Account Address: u/{account?.author.shortAddress}
            </li>
            <li className="settings-tip">
              Select a different account to use in the dropdown below.
            </li>
            <li>
              <div className="settings-input">
                <select className="settings-select"
                value={account?.name}
                onChange={handleAccountChange}
                >
                  {accounts.map((account) => (
                    <option key={account?.name} value={account?.name}>
                      {account?.name}
                    </option>
                  ))}
                </select>
                {account?.author.address.endsWith(".eth") ? null : (
                  <button style={{marginLeft: '35px'}} className="save-button" id="save-name" onClick={handleCopyAddress}>
                    {copyStatus ? "Copied!" : "Copy Full Address"}
                  </button>
                  )}
              </div>
            </li>
            <li className="settings-option disc">
              Crypto Address
            </li>
            <li className="settings-tip">
              {account?.author.address.endsWith(".eth") ? "Your account address is already an ENS name." : (
                'Change your account address to an ENS name you own: in your ENS name page on ens.domains, click on "Records", "Edit Records", "Add record", add "plebbit-author-address" as record name, add your full address as value (copy it with the button above) and save.'
              )}
            </li>
            <div className="settings-input">
              <input 
                className="settings-input" 
                style={{marginLeft: '20px'}}
                placeholder="address.eth"
                ref={ensRef}
                value={ensName}
                onChange={handleENSChange}
                disabled={checkedENS}
               />
              <button className="save-button" id="save-name" onClick={handleENSSave}>
                Save
              </button>
              <button className="save-button check-button" id="save-name" onClick={handleENSCheck}>
                Check
              </button>
            </div>
            {checkedENS && ensName === account?.signer?.address && (
              <li className="settings-tip" style={{marginTop: '10px', color: 'green'}}>
                  {ensName} has been acquired by you correctly.
              </li>
            )}
            {checkedENS && ensName !== account?.signer?.address && (
              <li className="settings-tip" style={{marginTop: '10px', color: 'red'}}>
                  {ensName} has not been acquired by you yet.
              </li>
            )}
            <li className="settings-option disc">
              Account Name
            </li>
            <li className="settings-tip">
              Change both your account name (default "Account 1") and display name (default "Anonymous"). This will not change your address.
            </li>
            <li>  
              <div className="settings-input">
                <input className="settings-input" style={{marginLeft: '20px'}}
                type="text" ref={nameRef} defaultValue={account?.author.displayName}
                placeholder="Anonymous"
                />
                <button className="save-button" id="save-name" onClick={handleDisplayName}>
                  Save
                </button>
              </div>
            </li>
          </ul>
        </ul>
        <ul>
          <li className="settings-cat-lbl">
            <span className={`${expanded.includes(2) ? 'minus' : 'plus'}`}
              onClick={() => toggleExpanded(2)}
            />
            <span className="settings-pointer" style={{cursor: "pointer"}}
              onClick={() => toggleExpanded(2)}
            >IPFS Options</span>
            <div className="plebbit-options-buttons"
            style={{ display: expanded.includes(2) ? 'block' : 'none' }}
            >
              <button className="save-button" 
              onClick={handleSavePlebbitOptions}>Save</button>
              <button className="reset-button"
              onClick={handleResetPlebbitOptions}>Reset</button> 
            </div>
          </li>
          <ul className="settings-cat" style={{ display: expanded.includes(2) ? 'block' : 'none', marginTop: '-10px' }}>
            <li className="settings-option disc">
              IPFS Gateway URLs
            </li>
            <li className="settings-tip">
              Optional URLs of IPFS gateways.
            </li>
            <div className="settings-input">
              <textarea placeholder="IPFS Gateway URLs"
                defaultValue={isElectron ? '' : account?.plebbitOptions?.ipfsGatewayUrls.join('\n')}
                ref={gatewayRef}
              />
            </div>
          </ul>
          <ul className="settings-cat" style={{ display: expanded.includes(2) ? 'block' : 'none' }}>
            <li className="settings-option disc">
              IPFS HTTP Clients Options</li>
            <li className="settings-tip">Optional URLs of IPFS APIs or IpfsHttpClientOptions, 'http://localhost:5001/api/v0' to use a local IPFS node.</li>
            <div className="settings-input">
              <textarea placeholder="IPFS HTTP Clients Options" 
                defaultValue={account?.plebbitOptions?.ipfsHttpClientsOptions ? account?.plebbitOptions?.ipfsHttpClientsOptions.join("\n") : ''}
                ref={ipfsRef}
              />
            </div>
          </ul>
          <ul className="settings-cat" style={{ display: expanded.includes(2) ? 'block' : 'none' }}>
            <li className="settings-option disc">
              PubSub HTTP Clients Options</li>
            <li className="settings-tip">Optional URLs or IpfsHttpClientOptions used for pubsub publishing when ipfsHttpClientOptions isn't available, like in the browser.</li>
            <div className="settings-input">
              <textarea placeholder="PubSub HTTP Clients Options" 
                defaultValue={isElectron ? '' : account?.plebbitOptions?.pubsubHttpClientsOptions.join('\n')}
                ref={pubsubRef} 
              />
            </div>
          </ul>
          <ul className="settings-cat" style={{ display: expanded.includes(2) ? 'block' : 'none' }}>
            <li className="settings-option disc">
              Data Path (Node Only)</li>
            <li className="settings-tip">Optional folder path to create/resume the user and subplebbit databases.</li>
            <div className="settings-input">
              <textarea placeholder="Data Path (Node Only)"
                ref={dataPathRef}
              />
            </div>
          </ul>
        </ul>
        <ul>
          <li className="settings-cat-lbl">
            <span className={`${expanded.includes(3) ? 'minus' : 'plus'}`}
              onClick={() => toggleExpanded(3)}
            />
            <span className="settings-pointer" style={{cursor: "pointer"}}
              onClick={() => toggleExpanded(3)}
            >Blockchain Options</span>
            <div className="plebbit-options-buttons"
            style={{ display: expanded.includes(3) ? 'block' : 'none' }}
            >
              <button className="save-button" onClick={handleSaveChainProviders}>Save</button>
              <button className="save-button" onClick={handleResetChainProviders}>Reset</button>
            </div>
          </li>
          <ul className="settings-cat" style={{ display: expanded.includes(3) ? 'block' : 'none', marginTop: '-10px'}}>
            <li className="settings-option disc">Ethereum RPC</li>
            <li className="settings-tip">Needed for .eth addresses.</li>
            <div className="settings-input">
              <textarea placeholder="Ethereum RPC URLs" 
                defaultValue={account?.plebbitOptions?.chainProviders?.['eth']?.urls.join("\n")}
                ref={ethereumRpcRef} 
              />
            </div>
            <li className="settings-option disc">Polygon RPC</li>
            <li className="settings-tip">Needed for XPLEB NFTs.</li>
            <div className="settings-input">
              <textarea placeholder="Polygon RPC URLs" 
                defaultValue={account?.plebbitOptions?.chainProviders?.['matic']?.urls.join("\n")}
                ref={polygonRpcRef} 
              />
            </div>
          </ul>
        </ul>
        <div>
          <button
            className="cache-button"
            onClick={async () => {
              if (window.confirm("Are you sure you want to clear the cache?")) {
                await deleteCaches();
                localStorage.setItem("cacheCleared", "true");
                window.location.reload();
              }
            }}
          >
            Clear Cache
          </button>
        </div>
      </div>
    </StyledModal>
  );
}

Modal.setAppElement("#root");

export default SettingsModal;