import { useState, useEffect } from "react";
import { invoke } from "@tauri-apps/api/core";
import "./App.css";

interface RcloneConfig {
  name: string;
  remote_path: string;
  local_path: string;
  access_key: string;
  secret_key: string;
}

interface SyncStatus {
  name: string;
  status: string;
  transferred: string;
  bytes: string;
  errors: number;
  last_updated: string;
}

type Screen = "Main" | "Status";

function App() {
  const [state, setState] = useState({
    name: "",
    access_key: "",
    secret_key: "",
    status_text: "Enter credentials to set up sync",
    sync_statuses: [] as SyncStatus[],
    show_config_dialog: false,
    show_about_dialog: false,
    current_screen: "Main" as Screen,
  });

  useEffect(() => {
    if (state.current_screen === "Status") {
      const interval = setInterval(() => {
        // In a real app, you would fetch actual configs here
        // This is just a mock implementation
        invoke<SyncStatus>("get_status", { remoteName: "example" })
          .then((status) => {
            setState(prev => ({
              ...prev,
              sync_statuses: [status]
            }));
          })
          .catch(console.error);
      }, 5000);
      return () => clearInterval(interval);
    }
  }, [state.current_screen]);

  const saveConfig = async () => {
    if (!state.name || !state.access_key || !state.secret_key) {
      setState(prev => ({ ...prev, status_text: "All fields are required!" }));
      return;
    }

    const config: RcloneConfig = {
      name: state.name,
      remote_path: `s3://${state.name}`,
      local_path: `${window.__TAURI__.path.homeDir}/General Bots/${state.name}`,
      access_key: state.access_key,
      secret_key: state.secret_key,
    };

    try {
      await invoke("save_config", { config });
      setState(prev => ({
        ...prev,
        status_text: "New sync saved!",
        show_config_dialog: false
      }));
    } catch (e) {
      setState(prev => ({
        ...prev,
        status_text: `Failed to save config: ${e}`
      }));
    }
  };

  const startSync = async () => {
    // In a real app, you would fetch actual configs here
    const config: RcloneConfig = {
      name: state.name || "example",
      remote_path: `s3://${state.name || "example"}`,
      local_path: `${window.__TAURI__.path.homeDir}/General Bots/${state.name || "example"}`,
      access_key: state.access_key || "dummy",
      secret_key: state.secret_key || "dummy",
    };

    try {
      await invoke("start_sync", { config });
      setState(prev => ({
        ...prev,
        status_text: "Sync started!"
      }));
    } catch (e) {
      setState(prev => ({
        ...prev,
        status_text: `Failed to start sync: ${e}`
      }));
    }
  };

  const stopSync = async () => {
    try {
      await invoke("stop_sync");
      setState(prev => ({
        ...prev,
        status_text: "Sync stopped."
      }));
    } catch (e) {
      setState(prev => ({
        ...prev,
        status_text: `Failed to stop sync: ${e}`
      }));
    }
  };

  return (
    <div className="app">
      <div className="menu-bar">
        <button onClick={() => setState(prev => ({ ...prev, show_config_dialog: true }))}>
          Add Sync Configuration
        </button>
        <button onClick={() => setState(prev => ({ ...prev, show_about_dialog: true }))}>
          About
        </button>
      </div>

      {state.current_screen === "Main" ? (
        <div className="main-screen">
          <h1>General Bots</h1>
          <p>{state.status_text}</p>
          <button onClick={startSync}>Start Sync</button>
          <button onClick={stopSync}>Stop Sync</button>
          <button onClick={() => setState(prev => ({ ...prev, current_screen: "Status" }))}>
            Show Status
          </button>
        </div>
      ) : (
        <div className="status-screen">
          <h1>Sync Status</h1>
          <div className="status-list">
            {state.sync_statuses.map((status, index) => (
              <div key={index} className="status-item">
                <h2>{status.name}</h2>
                <p>Status: {status.status}</p>
                <p>Transferred: {status.transferred}</p>
                <p>Bytes: {status.bytes}</p>
                <p>Errors: {status.errors}</p>
                <p>Last Updated: {status.last_updated}</p>
              </div>
            ))}
          </div>
          <button onClick={() => setState(prev => ({ ...prev, current_screen: "Main" }))}>
            Back
          </button>
        </div>
      )}

      {state.show_config_dialog && (
        <div className="dialog">
          <h2>Add Sync Configuration</h2>
          <input
            value={state.name}
            onChange={(e) => setState(prev => ({ ...prev, name: e.target.value }))}
            placeholder="Enter sync name"
          />
          <input
            value={state.access_key}
            onChange={(e) => setState(prev => ({ ...prev, access_key: e.target.value }))}
            placeholder="Enter access key"
          />
          <input
            value={state.secret_key}
            onChange={(e) => setState(prev => ({ ...prev, secret_key: e.target.value }))}
            placeholder="Enter secret key"
          />
          <button onClick={saveConfig}>Save</button>
          <button onClick={() => setState(prev => ({ ...prev, show_config_dialog: false }))}>
            Cancel
          </button>
        </div>
      )}

      {state.show_about_dialog && (
        <div className="dialog">
          <h2>About General Bots</h2>
          <p>Version: 1.0.0</p>
          <p>A professional-grade sync tool for OneDrive/Dropbox-like functionality.</p>
          <button onClick={() => setState(prev => ({ ...prev, show_about_dialog: false }))}>
            Close
          </button>
        </div>
      )}
    </div>
  );
}

export default App;