'use client';

import { useState, useEffect, useRef, useCallback } from 'react';
import { Slider } from '@/components/ui/slider';
import { Button } from '@/components/ui/button';
import {
  useLighten,
  useDarken,
  useSaturate,
  useDesaturate,
  useRotate,
  useComplement
} from '@/lib/api/queries';
import { toast } from 'sonner';

interface ManipulationPanelProps {
  color: string;
  onColorChange: (color: string) => void;
}

export function ManipulationPanel({ color, onColorChange }: ManipulationPanelProps) {
  const [lightenAmount, setLightenAmount] = useState(0);
  const [darkenAmount, setDarkenAmount] = useState(0);
  const [saturateAmount, setSaturateAmount] = useState(0);
  const [desaturateAmount, setDesaturateAmount] = useState(0);
  const [rotateAmount, setRotateAmount] = useState(0);

  const lightenMutation = useLighten();
  const darkenMutation = useDarken();
  const saturateMutation = useSaturate();
  const desaturateMutation = useDesaturate();
  const rotateMutation = useRotate();
  const complementMutation = useComplement();

  // Track if we're applying our own changes to prevent feedback loop
  const isApplyingRef = useRef(false);
  const baseColorRef = useRef(color);

  // Update base color only when not applying our own changes
  useEffect(() => {
    if (!isApplyingRef.current) {
      baseColorRef.current = color;
      // Reset sliders when color changes externally
      setLightenAmount(0);
      setDarkenAmount(0);
      setSaturateAmount(0);
      setDesaturateAmount(0);
      setRotateAmount(0);
    }
  }, [color]);

  // Debounced effect to apply manipulations
  useEffect(() => {
    const timer = setTimeout(async () => {
      // Skip if all sliders are at neutral position
      if (lightenAmount === 0 && darkenAmount === 0 && saturateAmount === 0 &&
          desaturateAmount === 0 && rotateAmount === 0) {
        return;
      }

      isApplyingRef.current = true;
      let currentColor = baseColorRef.current;

      try {
        // Apply lighten
        if (lightenAmount > 0) {
          const result = await lightenMutation.mutateAsync({
            colors: [currentColor],
            amount: lightenAmount,
          });
          if (result.colors[0]) {
            currentColor = result.colors[0].output;
          }
        }

        // Apply darken
        if (darkenAmount > 0) {
          const result = await darkenMutation.mutateAsync({
            colors: [currentColor],
            amount: darkenAmount,
          });
          if (result.colors[0]) {
            currentColor = result.colors[0].output;
          }
        }

        // Apply saturate
        if (saturateAmount > 0) {
          const result = await saturateMutation.mutateAsync({
            colors: [currentColor],
            amount: saturateAmount,
          });
          if (result.colors[0]) {
            currentColor = result.colors[0].output;
          }
        }

        // Apply desaturate
        if (desaturateAmount > 0) {
          const result = await desaturateMutation.mutateAsync({
            colors: [currentColor],
            amount: desaturateAmount,
          });
          if (result.colors[0]) {
            currentColor = result.colors[0].output;
          }
        }

        // Apply rotate
        if (rotateAmount !== 0) {
          const result = await rotateMutation.mutateAsync({
            colors: [currentColor],
            amount: rotateAmount,
          });
          if (result.colors[0]) {
            currentColor = result.colors[0].output;
          }
        }

        onColorChange(currentColor);
      } catch (error) {
        // Silent error during manipulation
      } finally {
        isApplyingRef.current = false;
      }
    }, 300);

    return () => clearTimeout(timer);
  }, [lightenAmount, darkenAmount, saturateAmount, desaturateAmount, rotateAmount]);

  const handleComplement = async () => {
    try {
      const result = await complementMutation.mutateAsync([color]);
      if (result.colors[0]) {
        onColorChange(result.colors[0].output);
        toast.success('Generated complementary color');
      }
    } catch (error) {
      toast.error('Failed to generate complement');
    }
  };

  const isLoading =
    lightenMutation.isPending ||
    darkenMutation.isPending ||
    saturateMutation.isPending ||
    desaturateMutation.isPending ||
    rotateMutation.isPending ||
    complementMutation.isPending;

  return (
    <div className="space-y-6">
      {/* Lighten */}
      <div>
        <Slider
          label="Lighten"
          min={0}
          max={1}
          step={0.05}
          value={lightenAmount}
          onChange={(e) => setLightenAmount(parseFloat(e.target.value))}
          suffix="%"
          showValue
        />
      </div>

      {/* Darken */}
      <div>
        <Slider
          label="Darken"
          min={0}
          max={1}
          step={0.05}
          value={darkenAmount}
          onChange={(e) => setDarkenAmount(parseFloat(e.target.value))}
          suffix="%"
          showValue
        />
      </div>

      {/* Saturate */}
      <div>
        <Slider
          label="Saturate"
          min={0}
          max={1}
          step={0.05}
          value={saturateAmount}
          onChange={(e) => setSaturateAmount(parseFloat(e.target.value))}
          suffix="%"
          showValue
        />
      </div>

      {/* Desaturate */}
      <div>
        <Slider
          label="Desaturate"
          min={0}
          max={1}
          step={0.05}
          value={desaturateAmount}
          onChange={(e) => setDesaturateAmount(parseFloat(e.target.value))}
          suffix="%"
          showValue
        />
      </div>

      {/* Rotate Hue */}
      <div>
        <Slider
          label="Rotate Hue"
          min={-180}
          max={180}
          step={5}
          value={rotateAmount}
          onChange={(e) => setRotateAmount(parseInt(e.target.value))}
          suffix="°"
          showValue
        />
      </div>

      {/* Quick Actions */}
      <div className="pt-4 border-t space-y-2">
        <h3 className="text-sm font-medium mb-3">Quick Actions</h3>
        <Button
          onClick={handleComplement}
          disabled={isLoading}
          variant="outline"
          className="w-full"
        >
          Get Complementary Color
        </Button>
      </div>
    </div>
  );
}