import DeleteIcon from "@mui/icons-material/Delete";
import {
  Button,
  Card,
  CardActions,
  CardContent,
  Grid,
  IconButton,
  Tooltip,
  Typography,
} from "@mui/material";
import React, { PropsWithChildren } from "react";
import { NatEntry } from "../../api/NetworksApi";
import { ServerApi } from "../../api/ServerApi";
import { useConfirm } from "../../hooks/providers/ConfirmDialogProvider";
import { IPInput } from "./IPInput";
import { PortInput } from "./PortInput";
import { RadioGroupInput } from "./RadioGroupInput";
import { SelectInput } from "./SelectInput";
import { TextInput } from "./TextInput";

export function NetNatConfiguration(p: {
  editable: boolean;
  nat: NatEntry[];
  nicsList: string[];
  onChange?: (nat: NatEntry[]) => void;
  version: 4 | 6;
}): React.ReactElement {
  const confirm = useConfirm();

  const addEntry = () => {
    p.nat.push({
      host_ip: {
        type: "ip",
        ip: p.version === 4 ? "10.0.0.1" : "fd00::",
      },
      host_port: { type: "single", port: 80 },
      guest_ip: p.version === 4 ? "10.0.0.100" : "fd00::",
      guest_port: 10,
      protocol: "TCP",
    });
    p.onChange?.(p.nat);
  };

  const onDelete = async (idx: number) => {
    if (!(await confirm("Do you really want to delete this entry?"))) return;

    p.nat.splice(idx, 1);
    p.onChange?.(p.nat);
  };

  return (
    <>
      {p.nat.map((e, num) => (
        <NatEntryForm
          key={num}
          {...p}
          entry={e}
          onChange={() => p.onChange?.(p.nat)}
          onDelete={() => onDelete(num)}
        />
      ))}

      {p.nat.length === 0 && (
        <Typography style={{ textAlign: "center" }}>
          You have not set any NAT entry yet.
        </Typography>
      )}

      {p.editable && <Button onClick={addEntry}>Add a new entry</Button>}
    </>
  );
}

function NatEntryForm(p: {
  editable: boolean;
  version: 4 | 6;
  entry: NatEntry;
  onChange?: () => void;
  onDelete: () => void;
  nicsList: string[];
}): React.ReactElement {
  const guestPortEnd =
    p.entry.host_port.type === "range"
      ? p.entry.host_port.end - p.entry.host_port.start + p.entry.guest_port
      : undefined;

  return (
    <Card style={{ margin: "30px" }} elevation={3}>
      <CardContent>
        <Grid container>
          <NATEntryProp>
            <SelectInput
              {...p}
              label="Protocol"
              options={[
                { value: "TCP" },
                { value: "UDP" },
                { label: "TCP & UDP", value: "Both" },
              ]}
              value={p.entry.protocol}
              onValueChange={(v) => {
                p.entry.protocol = v as any;
                p.onChange?.();
              }}
            />
          </NATEntryProp>
          <NATEntryProp>
            <TextInput
              {...p}
              label="Comment"
              value={p.entry.comment}
              onValueChange={(v) => {
                p.entry.comment = v;
                p.onChange?.();
              }}
              size={ServerApi.Config.constraints.net_nat_comment_size}
            />
          </NATEntryProp>

          {/* Host conf */}
          <NATEntryProp label="Host configuration">
            <SelectInput
              {...p}
              label="Host IP address specification"
              options={[
                {
                  label: "Specific IP",
                  value: "ip",
                  description: "Use a pre-defined IP address",
                },
                {
                  label: "Network interface",
                  value: "interface",
                  description:
                    "Use active IP addresses on the selected network interface during network startup to determine host adddress",
                },
              ]}
              value={p.entry.host_ip.type}
              onValueChange={(v) => {
                p.entry.host_ip.type = v as any;
                p.onChange?.();
              }}
            />

            {p.entry.host_ip.type === "ip" && (
              <IPInput
                {...p}
                label="Host IP address"
                value={p.entry.host_ip.ip}
                onValueChange={(v) => {
                  if (p.entry.host_ip.type === "ip") p.entry.host_ip.ip = v!;
                  p.onChange?.();
                }}
              />
            )}

            {p.entry.host_ip.type === "interface" && (
              <SelectInput
                {...p}
                label="Network interface"
                value={p.entry.host_ip.name}
                options={p.nicsList.map((n) => {
                  return {
                    value: n,
                  };
                })}
                onValueChange={(v) => {
                  if (p.entry.host_ip.type === "interface")
                    p.entry.host_ip.name = v!;
                  p.onChange?.();
                }}
              />
            )}
          </NATEntryProp>

          <NATEntryProp label="Target guest configuration">
            <IPInput
              {...p}
              label="Guest IP"
              value={p.entry.guest_ip}
              onValueChange={(v) => {
                p.entry.guest_ip = v!;
                p.onChange?.();
              }}
            />
          </NATEntryProp>

          <NATEntryProp>
            <RadioGroupInput
              {...p}
              options={[
                { label: "Single port", value: "single" },
                { label: "Range of ports", value: "range" },
              ]}
              value={p.entry.host_port.type}
              onValueChange={(v) => {
                p.entry.host_port.type = v as any;
                p.onChange?.();
              }}
            />

            {p.entry.host_port.type === "single" && (
              <PortInput
                {...p}
                label="Host port"
                value={p.entry.host_port.port}
                onChange={(v) => {
                  if (p.entry.host_port.type === "single")
                    p.entry.host_port.port = v!;
                  p.onChange?.();
                }}
              />
            )}

            {p.entry.host_port.type === "range" && (
              <div style={{ display: "flex" }}>
                <PortInput
                  {...p}
                  label="Host port start"
                  value={p.entry.host_port.start}
                  onChange={(v) => {
                    if (p.entry.host_port.type === "range")
                      p.entry.host_port.start = v!;
                    p.onChange?.();
                  }}
                />
                <PortSpacer />
                <PortInput
                  {...p}
                  label="Host port end"
                  value={p.entry.host_port.end}
                  onChange={(v) => {
                    if (p.entry.host_port.type === "range")
                      p.entry.host_port.end = v!;
                    p.onChange?.();
                  }}
                />
              </div>
            )}
          </NATEntryProp>

          <NATEntryProp>
            <div style={{ display: "flex", height: "100%", alignItems: "end" }}>
              <PortInput
                {...p}
                label={`Guest port ${guestPortEnd ? "start" : ""}`}
                value={p.entry.guest_port}
                onChange={(v) => {
                  p.entry.guest_port = v!;
                  p.onChange?.();
                }}
              />
              {guestPortEnd && <PortSpacer />}
              {guestPortEnd && (
                <PortInput
                  editable={false}
                  label={`Guest port end`}
                  value={guestPortEnd}
                  onChange={(v) => {
                    p.entry.guest_port = v!;
                    p.onChange?.();
                  }}
                />
              )}
            </div>
          </NATEntryProp>
        </Grid>
      </CardContent>
      <CardActions>
        {p.editable && (
          <Tooltip title="Remove the entry">
            <IconButton color="error" onClick={p.onDelete}>
              <DeleteIcon />
            </IconButton>
          </Tooltip>
        )}
      </CardActions>
    </Card>
  );
}

function NATEntryProp(
  p: PropsWithChildren<{ label?: string }>
): React.ReactElement {
  return (
    <Grid item sm={12} md={6} style={{ padding: "20px" }}>
      {p.label && (
        <Typography variant="h6" style={{ marginBottom: "10px" }}>
          {p.label}
        </Typography>
      )}
      {p.children}
    </Grid>
  );
}

function PortSpacer(): React.ReactElement {
  return <span style={{ width: "20px" }}></span>;
}