import {
  CheckCircleIcon,
  ArrowRightIcon,
  CircleStackIcon,
  PlayIcon,
  CheckBadgeIcon,
  ClockIcon,
  PauseCircleIcon,
  ExclamationCircleIcon,
  ChartBarIcon
} from '@heroicons/react/24/solid';
import type { PatternInfo, SewingProgress } from '../types/machine';
import { MachineStatus } from '../types/machine';
import type { PesPatternData } from '../utils/pystitchConverter';
import {
  canStartSewing,
  canStartMaskTrace,
  canResumeSewing,
  getStateVisualInfo
} from '../utils/machineStateHelpers';

interface ProgressMonitorProps {
  machineStatus: MachineStatus;
  patternInfo: PatternInfo | null;
  sewingProgress: SewingProgress | null;
  pesData: PesPatternData | null;
  onStartMaskTrace: () => void;
  onStartSewing: () => void;
  onResumeSewing: () => void;
  onDeletePattern: () => void;
  isDeleting?: boolean;
}

export function ProgressMonitor({
  machineStatus,
  patternInfo,
  sewingProgress,
  pesData,
  onStartMaskTrace,
  onStartSewing,
  onResumeSewing,
  isDeleting = false,
}: ProgressMonitorProps) {
  // State indicators
  const isMaskTraceComplete = machineStatus === MachineStatus.MASK_TRACE_COMPLETE;

  const stateVisual = getStateVisualInfo(machineStatus);

  const progressPercent = patternInfo
    ? ((sewingProgress?.currentStitch || 0) / patternInfo.totalStitches) * 100
    : 0;

  // Calculate color block information from pesData
  const colorBlocks = pesData ? (() => {
    const blocks: Array<{
      colorIndex: number;
      threadHex: string;
      startStitch: number;
      endStitch: number;
      stitchCount: number;
    }> = [];

    let currentColorIndex = pesData.stitches[0]?.[3] ?? 0;
    let blockStartStitch = 0;

    for (let i = 0; i < pesData.stitches.length; i++) {
      const stitchColorIndex = pesData.stitches[i][3];

      // When color changes, save the previous block
      if (stitchColorIndex !== currentColorIndex || i === pesData.stitches.length - 1) {
        const endStitch = i === pesData.stitches.length - 1 ? i + 1 : i;
        blocks.push({
          colorIndex: currentColorIndex,
          threadHex: pesData.threads[currentColorIndex]?.hex || '#000000',
          startStitch: blockStartStitch,
          endStitch: endStitch,
          stitchCount: endStitch - blockStartStitch,
        });

        currentColorIndex = stitchColorIndex;
        blockStartStitch = i;
      }
    }

    return blocks;
  })() : [];

  // Determine current color block based on current stitch
  const currentStitch = sewingProgress?.currentStitch || 0;
  const currentBlockIndex = colorBlocks.findIndex(
    block => currentStitch >= block.startStitch && currentStitch < block.endStitch
  );

  const stateIndicatorColors = {
    idle: 'bg-blue-50 dark:bg-blue-900/20 border-blue-600',
    info: 'bg-blue-50 dark:bg-blue-900/20 border-blue-600',
    active: 'bg-yellow-50 dark:bg-yellow-900/20 border-yellow-500',
    waiting: 'bg-yellow-50 dark:bg-yellow-900/20 border-yellow-500',
    warning: 'bg-yellow-50 dark:bg-yellow-900/20 border-yellow-500',
    complete: 'bg-green-50 dark:bg-green-900/20 border-green-600',
    success: 'bg-green-50 dark:bg-green-900/20 border-green-600',
    interrupted: 'bg-red-50 dark:bg-red-900/20 border-red-600',
    error: 'bg-red-50 dark:bg-red-900/20 border-red-600',
    danger: 'bg-red-50 dark:bg-red-900/20 border-red-600',
  };

  return (
    <div className="bg-white dark:bg-gray-800 p-4 rounded-lg shadow-md border-l-4 border-purple-600 dark:border-purple-500">
      <div className="flex items-start gap-3 mb-3">
        <ChartBarIcon className="w-6 h-6 text-purple-600 dark:text-purple-400 flex-shrink-0 mt-0.5" />
        <div className="flex-1 min-w-0">
          <h3 className="text-sm font-semibold text-gray-900 dark:text-white mb-1">Sewing Progress</h3>
          {sewingProgress && (
            <p className="text-xs text-gray-600 dark:text-gray-400">
              {progressPercent.toFixed(1)}% complete
            </p>
          )}
        </div>
      </div>

      {/* Pattern Info */}
      {patternInfo && (
        <div className="grid grid-cols-3 gap-2 text-xs mb-3">
          <div className="bg-gray-50 dark:bg-gray-700/50 p-2 rounded">
            <span className="text-gray-600 dark:text-gray-400 block">Total Stitches</span>
            <span className="font-semibold text-gray-900 dark:text-gray-100">{patternInfo.totalStitches.toLocaleString()}</span>
          </div>
          <div className="bg-gray-50 dark:bg-gray-700/50 p-2 rounded">
            <span className="text-gray-600 dark:text-gray-400 block">Est. Time</span>
            <span className="font-semibold text-gray-900 dark:text-gray-100">
              {Math.floor(patternInfo.totalTime / 60)}:{String(patternInfo.totalTime % 60).padStart(2, '0')}
            </span>
          </div>
          <div className="bg-gray-50 dark:bg-gray-700/50 p-2 rounded">
            <span className="text-gray-600 dark:text-gray-400 block">Speed</span>
            <span className="font-semibold text-gray-900 dark:text-gray-100">{patternInfo.speed} spm</span>
          </div>
        </div>
      )}

      {/* Progress Bar */}
      {sewingProgress && (
        <div className="mb-3">
          <div className="h-3 bg-gray-300 dark:bg-gray-600 rounded-md overflow-hidden shadow-inner relative mb-2">
            <div className="h-full bg-gradient-to-r from-purple-600 to-purple-700 dark:from-purple-600 dark:to-purple-800 transition-all duration-300 ease-out relative overflow-hidden after:absolute after:inset-0 after:bg-gradient-to-r after:from-transparent after:via-white/30 after:to-transparent after:animate-[shimmer_2s_infinite]" style={{ width: `${progressPercent}%` }} />
          </div>

          <div className="grid grid-cols-2 gap-2 text-xs mb-3">
            <div className="bg-gray-50 dark:bg-gray-700/50 p-2 rounded">
              <span className="text-gray-600 dark:text-gray-400 block">Current Stitch</span>
              <span className="font-semibold text-gray-900 dark:text-gray-100">
                {sewingProgress.currentStitch.toLocaleString()} / {patternInfo?.totalStitches.toLocaleString() || 0}
              </span>
            </div>
            <div className="bg-gray-50 dark:bg-gray-700/50 p-2 rounded">
              <span className="text-gray-600 dark:text-gray-400 block">Time Elapsed</span>
              <span className="font-semibold text-gray-900 dark:text-gray-100">
                {Math.floor(sewingProgress.currentTime / 60)}:{String(sewingProgress.currentTime % 60).padStart(2, '0')}
              </span>
            </div>
          </div>
        </div>
      )}

      {/* State Visual Indicator */}
      {patternInfo && (() => {
        const iconMap = {
          ready: <ClockIcon className="w-5 h-5 text-blue-600 dark:text-blue-400" />,
          active: <PlayIcon className="w-5 h-5 text-yellow-600 dark:text-yellow-400" />,
          waiting: <PauseCircleIcon className="w-5 h-5 text-yellow-600 dark:text-yellow-400" />,
          complete: <CheckBadgeIcon className="w-5 h-5 text-green-600 dark:text-green-400" />,
          interrupted: <PauseCircleIcon className="w-5 h-5 text-red-600 dark:text-red-400" />,
          error: <ExclamationCircleIcon className="w-5 h-5 text-red-600 dark:text-red-400" />
        };

        return (
          <div className={`flex items-center gap-3 p-2.5 rounded-lg mb-3 border-l-4 ${stateIndicatorColors[stateVisual.color as keyof typeof stateIndicatorColors] || stateIndicatorColors.info}`}>
            <div className="flex-shrink-0">
              {iconMap[stateVisual.iconName]}
            </div>
            <div className="flex-1">
              <div className="font-semibold text-xs dark:text-gray-100">{stateVisual.label}</div>
              <div className="text-[10px] text-gray-600 dark:text-gray-400">{stateVisual.description}</div>
            </div>
          </div>
        );
      })()}

      {/* Color Blocks */}
      {colorBlocks.length > 0 && (
        <div className="mb-3">
          <h4 className="text-xs font-semibold mb-2 text-gray-700 dark:text-gray-300">Color Blocks</h4>
          <div className="flex flex-col gap-2">
            {colorBlocks.map((block, index) => {
              const isCompleted = currentStitch >= block.endStitch;
              const isCurrent = index === currentBlockIndex;

              // Calculate progress within current block
              let blockProgress = 0;
              if (isCurrent) {
                blockProgress = ((currentStitch - block.startStitch) / block.stitchCount) * 100;
              } else if (isCompleted) {
                blockProgress = 100;
              }

              return (
                <div
                  key={index}
                  className={`p-2.5 rounded-lg border-2 transition-all duration-300 ${
                    isCompleted
                      ? 'border-green-600 bg-green-50 dark:bg-green-900/20'
                      : isCurrent
                      ? 'border-purple-600 bg-purple-50 dark:bg-purple-900/20 shadow-lg shadow-purple-600/20 animate-pulseGlow'
                      : 'border-gray-200 dark:border-gray-600 bg-gray-50 dark:bg-gray-800/50 opacity-70'
                  }`}
                  role="listitem"
                  aria-label={`Thread ${block.colorIndex + 1}, ${block.stitchCount} stitches, ${isCompleted ? 'completed' : isCurrent ? 'in progress' : 'pending'}`}
                >
                  <div className="flex items-center gap-2.5">
                    {/* Color swatch */}
                    <div
                      className="w-7 h-7 rounded-lg border-2 border-gray-300 dark:border-gray-600 shadow-md flex-shrink-0"
                      style={{
                        backgroundColor: block.threadHex,
                        ...(isCurrent && { borderColor: '#9333ea' })
                      }}
                      title={`Thread color: ${block.threadHex}`}
                      aria-label={`Thread color ${block.threadHex}`}
                    />

                    {/* Thread info */}
                    <div className="flex-1 min-w-0">
                      <div className="font-semibold text-xs text-gray-900 dark:text-gray-100">
                        Thread {block.colorIndex + 1}
                      </div>
                      <div className="text-[10px] text-gray-600 dark:text-gray-400 mt-0.5">
                        {block.stitchCount.toLocaleString()} stitches
                      </div>
                    </div>

                    {/* Status icon */}
                    {isCompleted ? (
                      <CheckCircleIcon className="w-5 h-5 text-green-600 flex-shrink-0" aria-label="Completed" />
                    ) : isCurrent ? (
                      <ArrowRightIcon className="w-5 h-5 text-purple-600 flex-shrink-0 animate-pulse" aria-label="In progress" />
                    ) : (
                      <CircleStackIcon className="w-5 h-5 text-gray-400 flex-shrink-0" aria-label="Pending" />
                    )}
                  </div>

                  {/* Progress bar for current block */}
                  {isCurrent && (
                    <div className="mt-2 h-1.5 bg-gray-200 dark:bg-gray-700 rounded-full overflow-hidden">
                      <div
                        className="h-full bg-purple-600 dark:bg-purple-500 transition-all duration-300 rounded-full"
                        style={{ width: `${blockProgress}%` }}
                        role="progressbar"
                        aria-valuenow={Math.round(blockProgress)}
                        aria-valuemin={0}
                        aria-valuemax={100}
                        aria-label={`${Math.round(blockProgress)}% complete`}
                      />
                    </div>
                  )}
                </div>
              );
            })}
          </div>
        </div>
      )}

      {/* Action buttons */}
      <div className="flex gap-2 flex-wrap">
        {/* Resume has highest priority when available */}
        {canResumeSewing(machineStatus) && (
          <button
            onClick={onResumeSewing}
            disabled={isDeleting}
            className="flex items-center gap-2 px-3 py-2 bg-blue-600 dark:bg-blue-700 text-white rounded font-semibold text-xs hover:bg-blue-700 dark:hover:bg-blue-600 active:bg-blue-800 dark:active:bg-blue-500 transition-colors cursor-pointer disabled:opacity-50 disabled:cursor-not-allowed"
            aria-label="Resume sewing the current pattern"
          >
            <PlayIcon className="w-3.5 h-3.5" />
            Resume Sewing
          </button>
        )}

        {/* Start Sewing - primary action */}
        {canStartSewing(machineStatus) && !canResumeSewing(machineStatus) && (
          <button
            onClick={onStartSewing}
            disabled={isDeleting}
            className="px-3 py-2 bg-blue-600 dark:bg-blue-700 text-white rounded font-semibold text-xs hover:bg-blue-700 dark:hover:bg-blue-600 active:bg-blue-800 dark:active:bg-blue-500 transition-colors cursor-pointer disabled:opacity-50 disabled:cursor-not-allowed"
            aria-label="Start sewing the pattern"
          >
            Start Sewing
          </button>
        )}

        {/* Start Mask Trace - secondary action */}
        {canStartMaskTrace(machineStatus) && (
          <button
            onClick={onStartMaskTrace}
            disabled={isDeleting}
            className="px-3 py-2 bg-gray-600 dark:bg-gray-700 text-white rounded font-semibold text-xs hover:bg-gray-700 dark:hover:bg-gray-600 active:bg-gray-800 dark:active:bg-gray-500 transition-colors cursor-pointer disabled:opacity-50 disabled:cursor-not-allowed"
            aria-label={isMaskTraceComplete ? 'Start mask trace again' : 'Start mask trace'}
          >
            {isMaskTraceComplete ? 'Trace Again' : 'Start Mask Trace'}
          </button>
        )}
      </div>
    </div>
  );
}