import React, { useState, useEffect } from "react";
import { Button } from "@/components/ui/button";
import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from "@/components/ui/select";
import {
  Dialog,
  DialogContent,
  DialogHeader,
  DialogTitle,
  DialogDescription,
} from "@/components/ui/dialog";
import { Settings } from "lucide-react";
import PortDetectionModal from "@/components/ui/PortDetectionModal";
import PortDetectionButton from "@/components/ui/PortDetectionButton";
import { useApi } from "@/contexts/ApiContext";
import { useAutoSave } from "@/hooks/useAutoSave";

interface DirectFollowerModalProps {
  open: boolean;
  onOpenChange: (open: boolean) => void;
  followerPort: string;
  setFollowerPort: (value: string) => void;
  followerConfig: string;
  setFollowerConfig: (value: string) => void;
  followerConfigs: string[];
  isLoadingConfigs: boolean;
  onStart: () => void;
}

const DirectFollowerModal: React.FC<DirectFollowerModalProps> = ({
  open,
  onOpenChange,
  followerPort,
  setFollowerPort,
  followerConfig,
  setFollowerConfig,
  followerConfigs,
  isLoadingConfigs,
  onStart,
}) => {
  const { baseUrl, fetchWithHeaders } = useApi();
  const { debouncedSavePort, debouncedSaveConfig } = useAutoSave();
  const [showPortDetection, setShowPortDetection] = useState(false);

  // Load saved follower port and configuration on component mount
  useEffect(() => {
    const loadSavedData = async () => {
      try {
        // Load follower port
        const followerResponse = await fetchWithHeaders(
          `${baseUrl}/robot-port/follower`
        );
        const followerData = await followerResponse.json();
        if (followerData.status === "success" && followerData.default_port) {
          setFollowerPort(followerData.default_port);
        }

        // Load follower configuration
        const followerConfigResponse = await fetchWithHeaders(
          `${baseUrl}/robot-config/follower?available_configs=${followerConfigs.join(',')}`
        );
        const followerConfigData = await followerConfigResponse.json();
        if (followerConfigData.status === "success" && followerConfigData.default_config) {
          setFollowerConfig(followerConfigData.default_config);
        }
      } catch (error) {
        console.error("Error loading saved data:", error);
      }
    };

    if (open && followerConfigs.length > 0) {
      loadSavedData();
    }
  }, [open, setFollowerPort, setFollowerConfig, followerConfigs, baseUrl, fetchWithHeaders]);

  const handlePortDetection = () => {
    setShowPortDetection(true);
  };

  const handlePortDetected = (port: string) => {
    setFollowerPort(port);
  };

  // Enhanced port change handler that saves automatically
  const handleFollowerPortChange = (value: string) => {
    setFollowerPort(value);
    // Auto-save with debouncing to avoid excessive API calls
    debouncedSavePort("follower", value);
  };

  // Enhanced config change handler that saves automatically
  const handleFollowerConfigChange = (value: string) => {
    setFollowerConfig(value);
    // Auto-save with debouncing to avoid excessive API calls
    debouncedSaveConfig("follower", value);
  };

  return (
    <Dialog open={open} onOpenChange={onOpenChange}>
      <DialogContent className="bg-gray-900 border-gray-800 text-white sm:max-w-[500px] p-8">
        <DialogHeader>
          <div className="flex justify-center items-center gap-4 mb-4">
            <Settings className="w-8 h-8 text-blue-500" />
          </div>
          <DialogTitle className="text-white text-center text-2xl font-bold">
            Configure Direct Follower Control
          </DialogTitle>
        </DialogHeader>
        <div className="space-y-6 py-4">
          <DialogDescription className="text-gray-400 text-base leading-relaxed text-center">
            Configure the follower robot arm for direct control with 6-axis commands.
          </DialogDescription>

          <div className="grid grid-cols-1 gap-6">
            <div className="space-y-2">
              <Label
                htmlFor="followerPort"
                className="text-sm font-medium text-gray-300"
              >
                Follower Port
              </Label>
              <div className="flex gap-2">
                <Input
                  id="followerPort"
                  value={followerPort}
                  onChange={(e) => handleFollowerPortChange(e.target.value)}
                  placeholder="/dev/tty.usbmodem5A460816621"
                  className="bg-gray-800 border-gray-700 text-white flex-1"
                />
                <PortDetectionButton
                  onClick={handlePortDetection}
                  robotType="follower"
                />
              </div>
            </div>

            <div className="space-y-2">
              <Label
                htmlFor="followerConfig"
                className="text-sm font-medium text-gray-300"
              >
                Follower Calibration Config
              </Label>
              <Select value={followerConfig} onValueChange={handleFollowerConfigChange}>
                <SelectTrigger className="bg-gray-800 border-gray-700 text-white">
                  <SelectValue
                    placeholder={
                      isLoadingConfigs
                        ? "Loading configs..."
                        : "Select follower config"
                    }
                  />
                </SelectTrigger>
                <SelectContent className="bg-gray-800 border-gray-700">
                  {followerConfigs.map((config) => (
                    <SelectItem
                      key={config}
                      value={config}
                      className="text-white hover:bg-gray-700"
                    >
                      {config}
                    </SelectItem>
                  ))}
                </SelectContent>
              </Select>
            </div>
          </div>

          <div className="flex flex-col sm:flex-row gap-4 justify-center pt-4">
            <Button
              onClick={onStart}
              className="w-full sm:w-auto bg-blue-500 hover:bg-blue-600 text-white px-10 py-6 text-lg transition-all shadow-md shadow-blue-500/30 hover:shadow-lg hover:shadow-blue-500/40"
              disabled={isLoadingConfigs}
            >
              Start Direct Control
            </Button>
            <Button
              onClick={() => onOpenChange(false)}
              variant="outline"
              className="w-full sm:w-auto border-gray-500 hover:border-gray-200 px-10 py-6 text-lg text-zinc-500 bg-zinc-900 hover:bg-zinc-800"
            >
              Cancel
            </Button>
          </div>
        </div>
      </DialogContent>

      <PortDetectionModal
        open={showPortDetection}
        onOpenChange={setShowPortDetection}
        robotType="follower"
        onPortDetected={handlePortDetected}
      />
    </Dialog>
  );
};

export default DirectFollowerModal;