import * as React from 'react';

import AppBar from '@mui/material/AppBar';
import Box from '@mui/material/Box';
import Button from '@mui/material/Button';
import Chip from '@mui/material/Chip';
import CssBaseline from '@mui/material/CssBaseline';
import Dialog from '@mui/material/Dialog';
import DialogActions from '@mui/material/DialogActions';
import DialogContent from '@mui/material/DialogContent';
import DialogContentText from '@mui/material/DialogContentText';
import DialogTitle from '@mui/material/DialogTitle';
import Divider from '@mui/material/Divider';
import IconButton from '@mui/material/IconButton';
import MenuItem from '@mui/material/MenuItem';
import Select from '@mui/material/Select';
import SettingsBrightnessIcon from '@mui/icons-material/SettingsBrightness';
import TextField from '@mui/material/TextField';
import Toolbar from '@mui/material/Toolbar';
import Typography from '@mui/material/Typography';

import { ThemeProvider, createTheme } from '@mui/material/styles';

import './App.css'

import Map from './Map.js';
import Rooms from './Rooms.js';

function ChangeFloor({ currentFloor, callbackFloorChanged }) {
  const [sites, setSites] = React.useState([]);
  const handleFloorChanged = (event) => {
    callbackFloorChanged(event.target.value);
  };

  React.useEffect(() => {
    fetch("https://encartes.aliens-lyon.fr/api/map/get_all_floors/")
      .then(response => response.json())
      .then(data => {
        setSites(data);

        // Display a floor
        callbackFloorChanged(data[0].buildings[0].floors[0].id)
      });
  }, [callbackFloorChanged]);

  if (currentFloor === undefined) return;

  var items = [];

  sites.forEach(site => {
    site.buildings.forEach(building => {
      building.floors.forEach(floor => {
        items.push(
          <MenuItem value={floor.id}>{site.name} / {building.name} / {floor.name}</MenuItem>
        )
      })
    })

  });

  return <>
    <div style={{ padding: '24px' }}>
      <Typography component="h2" variant="h5" gutterBottom>
        Changer d'étage
      </Typography>
      <Select
        value={currentFloor}
        label="Étage"
        onChange={handleFloorChanged}
        fullWidth
      >
        {items}
      </Select>
    </div>
  </>
}

function RoomResearch({ callbackRoomSelected }) {
  const [currentRequest, setCurrentRequest] = React.useState("");
  const [rooms, setRooms] = React.useState([]);

  const startResearch = (event) => {
    fetch("https://encartes.aliens-lyon.fr/api/map/find_place_by_name/" + currentRequest)
      .then(response => response.json())
      .then(data => {
        setRooms(data);
      });
  };

  return <>
    <div style={{ padding: '24px' }}>
      <Typography component="h2" variant="h5" gutterBottom>
        Rechercher une salle
      </Typography>
      <TextField
        label="Nom, code, occupants, ..."
        value={currentRequest}
        onChange={(event) => { setCurrentRequest(event.target.value) }}
        variant="outlined"
        fullWidth
      />
      <Box
        marginTop={1}
        display="flex"
        justifyContent="flex-end"
        alignItems="flex-end"
      >
        <Button variant="contained" onClick={startResearch}>Rechercher</Button>
      </Box>
      <Rooms rooms={rooms} callbackRoomSelected={callbackRoomSelected} />
    </div>
  </>
}

function RoomInformation({ roomId, setIsEditDialogOpen }) {
  const [names, setNames] = React.useState([]);
  const [users, setUsers] = React.useState([]);

  React.useEffect(() => {
    if (roomId !== undefined) {
      fetch("https://encartes.aliens-lyon.fr/api/map/get_place_info/" + roomId)
        .then(response => response.json())
        .then(data => {
          setNames(data.names);
          setUsers(data.users);
        });
    }
  }, [roomId]);

  if (roomId === undefined) {
    return;
  }

  return <div style={{ padding: '24px' }}>
    <Typography component="h2" variant="h5" gutterBottom>
      Salle sélectionnée
    </Typography>
    <ul>
      <li>{
        names.length === 0 ? <em>Aucun nom défini</em> : names.join(', ')
      }</li>
      <li>{
        users.length === 0
          ? <em>Aucun utilisateur défini</em>
          : 'Utilisée par ' + users.join(', ')
      }</li>
    </ul>
    <a onClick={() => { setIsEditDialogOpen(true) }}>Modifier</a>
  </div>
}

function TopBar({toggleTheme}) {
  const [openAboutModal, setOpenAboutModal] = React.useState(false);

  const handleOpenAboutModal = () => {
    setOpenAboutModal(true);
  };

  const handleCloseAboutModal = () => {
    setOpenAboutModal(false);
  };

  return <>
    <AppBar position="static">
      <Toolbar>
        <Typography variant="h6" component="div" sx={{ flexGrow: 1 }}>
          ENcarteS
        </Typography>
        <IconButton onClick={toggleTheme} size="large">
          <SettingsBrightnessIcon fontSize="inherit"/>
        </IconButton>
        <Button color="inherit" onClick={handleOpenAboutModal}>À propos</Button>
      </Toolbar>
    </AppBar>

    <Dialog
      open={openAboutModal}
      onClose={handleCloseAboutModal}
      aria-labelledby="alert-dialog-title"
      aria-describedby="alert-dialog-description"
    >
      <DialogTitle id="alert-dialog-title">
        {"À propos d'ENcarteS"}
      </DialogTitle>
      <DialogContent>
        <DialogContentText id="alert-dialog-description">
          ENcarteS permet de rechercher les salles de l'ENS !
        </DialogContentText>
      </DialogContent>
      <DialogActions>
        <Button onClick={handleCloseAboutModal}>Ok</Button>
      </DialogActions>
    </Dialog>
  </>
}

function EditDialog({ isOpen, setIsOpen, room }) {
  const [names, setNames] = React.useState([]);
  const [users, setUsers] = React.useState([]);
  const [newPlaceName, setNewPlaceName] = React.useState("");

  // Used to refresh useEffect
  const [updatesCount, setupdatesCount] = React.useState(0);

  React.useEffect(() => {
    if (room !== undefined) {
      fetch("https://encartes.aliens-lyon.fr/api/map/get_place_info/" + room)
        .then(response => response.json())
        .then(data => {
          setNames(data.names);
          setUsers(data.users);
        });
    }
  }, [room, updatesCount]);

  const refresh = () => {
    setupdatesCount(updatesCount + 1);
  };

  const addName = () => {
    fetch("https://encartes.aliens-lyon.fr/api/map/add_place_name/" + room + "/" + encodeURI(newPlaceName))
      .then(response => refresh());
  };

  const removeName = (placeName) => {
    fetch("https://encartes.aliens-lyon.fr/api/map/del_place_name/" + room + "/" + encodeURI(placeName))
      .then(response => refresh());
  }

  return <Dialog open={isOpen} onClose={() => { setIsOpen(false) }}>
    <DialogTitle>Salle n°{room}</DialogTitle>
    <DialogContent>
      <DialogContentText>
        Noms :<br />
        {names.map(name => {
          return <Chip label={name} variant="outlined" onDelete={() => { removeName(name) }} />
        })}

        <TextField
          value={newPlaceName}
          onChange={(event) => { setNewPlaceName(event.target.value) }}
          label="Nouveau nom"
          margin="dense"
          fullWidth
        />
        <Button onClick={() => { addName() }}>Ajouter</Button>

        <Divider />

        Utilisateurs :<br />
        {users.map(name => {
          return <Chip label={name} variant="outlined" onDelete={() => { }} />
        })}
      </DialogContentText>

    </DialogContent>
    <DialogActions>
      <Button onClick={() => { setIsOpen(false) }}>Fermer</Button>
    </DialogActions>
  </Dialog>
}

function App({toggleTheme}) {
  const [currentFloor, setCurrentFloor] = React.useState(undefined);
  const [selectedRoom, setSelectedRoom] = React.useState(undefined);
  const [isEditDialogOpen, setIsEditDialogOpen] = React.useState(false);

  return <>
    <EditDialog
      isOpen={isEditDialogOpen}
      setIsOpen={setIsEditDialogOpen}
      room={selectedRoom}
    />
    <TopBar toggleTheme={toggleTheme}/>
    <div style={{ flexGrow: '1', display: 'flex', flexDirection: 'line', flexWrap: 'nowrap' }}>
      {currentFloor !== undefined ? <Map
        selectedRoom={selectedRoom}
        callbackRoomSelected={setSelectedRoom}
        floorID={currentFloor}
        callbackChangeFloor={setCurrentFloor}
      /> : <></>}
      <div>
        <ChangeFloor currentFloor={currentFloor} callbackFloorChanged={setCurrentFloor} />
        <Divider />
        <RoomResearch callbackRoomSelected={(floor, room) => {
          setCurrentFloor(floor);
          setSelectedRoom(room);
        }} />
        <Divider />
        <RoomInformation
          roomId={selectedRoom}
          setIsEditDialogOpen={setIsEditDialogOpen}
        />
      </div>
    </div>
  </>
}

export default function ThemedApp() {
  const [themeMode, setThemeMode] = React.useState('light');

  const theme = createTheme({
    palette: {
      mode: themeMode,
    },
  });

  const toggleTheme = () => {
    if (themeMode === 'light') {
      setThemeMode('dark')
    } else {
      setThemeMode('light')
    }
  }

  return (
    <ThemeProvider theme={theme}>
      <CssBaseline />
      <App toggleTheme={toggleTheme} />
    </ThemeProvider>
  );
}