import React from 'react';
import { ArrowDown, ArrowRight, ArrowUp } from 'lucide-react';

const IsoformPipeline = ({
  title = "Bioinformatics Pipeline",
  leftSteps = [
    "Raw Sequencing Data (fastq files)",
    "Quality Control and Preprocessing of Data", 
    "High Quality Sequencing Data (fastq file)",
    "Build Similarity Graph and Polishing"
  ],
  rightSteps = [
    "Downstream Analysis (Fusion Analysis, Splicing Analysis)",
    "Transcript Annotation and Classification",
    "Sequencing Merge and Redundancy Removal", 
    "Alignment to Reference Genome"
  ],
  backgroundColor = "bg-gray-50",
  cardColor = "bg-gray-300",
  textColor = "text-teal-600",
  arrowColor = "text-gray-600",
  className = "",
  cardClassName = "",
  titleClassName = ""
}) => {
  // Combine steps for mobile layout
  const mobileSteps = [...leftSteps, ...rightSteps.slice().reverse()];

  return (
    <section className={`py-6 sm:py-8 lg:py-12 ${backgroundColor} ${className}`}>
      <div className="container mx-auto max-w-none px-3 sm:px-4 lg:px-6">
        <h2 className={`text-gray-700 text-left pb-4 sm:pb-6 text-xl sm:text-2xl lg:text-3xl font-normal ${titleClassName}`}>
          {title}
        </h2>

        {/* Pipeline Flowchart */}
        <div className="bg-white rounded-xl shadow-lg p-4 sm:p-6 lg:p-8">
          <div className="flex justify-center">
            <div className="w-full max-w-5xl">
              <div className="relative">
                {/* Mobile Layout - Single Column */}
                <div className="block sm:hidden">
                  <div className="flex flex-col items-center space-y-3">
                    {mobileSteps.map((step, index) => (
                      <React.Fragment key={index}>
                        <div className={`${cardColor} rounded-lg p-3 w-full text-center border ${cardClassName}`}>
                          <h3 className={`text-xs font-medium ${textColor}`}>{step}</h3>
                        </div>
                        {index < mobileSteps.length - 1 && (
                          <ArrowDown className={`w-5 h-5 ${arrowColor}`} />
                        )}
                      </React.Fragment>
                    ))}
                  </div>
                </div>

                {/* Desktop Layout - Two Columns */}
                <div className="hidden sm:block">
                  <div className="grid grid-cols-2 gap-4 sm:gap-6 lg:gap-8">
                    {/* Left Column */}
                    <div className="flex flex-col items-center space-y-3">
                      {leftSteps.map((step, index) => (
                        <React.Fragment key={index}>
                          <div className={`${cardColor} rounded-lg p-4 w-full text-center border ${cardClassName}`} style={{maxWidth: '19rem'}}>
                            <h3 className={`text-sm font-medium ${textColor}`}>{step}</h3>
                          </div>
                          {index < leftSteps.length - 1 && (
                            <ArrowDown className={`w-6 h-6 ${arrowColor}`} />
                          )}
                        </React.Fragment>
                      ))}
                    </div>

                    {/* Right Column */}
                    <div className="flex flex-col items-center space-y-3">
                      {rightSteps.map((step, index) => (
                        <React.Fragment key={index}>
                          <div className={`${cardColor} rounded-lg p-4 w-full text-center border ${cardClassName}`} style={{maxWidth: '19rem'}}>
                            <h3 className={`text-sm font-medium ${textColor}`}>{step}</h3>
                          </div>
                          {index < rightSteps.length - 1 && (
                            <ArrowUp className={`w-6 h-6 ${arrowColor}`} />
                          )}
                        </React.Fragment>
                      ))}
                    </div>
                  </div>

                  {/* Diagonal Arrow from High Quality Sequencing Data to Alignment to Reference Genome */}
                  <div className="absolute top-80 left-1/2 transform -translate-x-1/2 -translate-y-1/2">
                    <svg 
                      width="180" 
                      height="60" 
                      viewBox="0 0 180 60" 
                      className={arrowColor}
                      style={{transform: 'rotate(20deg)'}}
                    >
                      <defs>
                        <marker
                          id="arrowhead"
                          markerWidth="10"
                          markerHeight="7"
                          refX="9"
                          refY="3.5"
                          orient="auto"
                        >
                          <polygon
                            points="0 0, 10 3.5, 0 7"
                            fill="currentColor"
                          />
                        </marker>
                      </defs>
                      <line
                        x1="10"
                        y1="10"
                        x2="170"
                        y2="50"
                        stroke="currentColor"
                        strokeWidth="2"
                        markerEnd="url(#arrowhead)"
                      />
                    </svg>
                  </div>
                </div>
              </div>
            </div>
          </div>
        </div>
      </div>
    </section>
  );
};

export default IsoformPipeline;