import type { ProportionBarViewProps } from "./ProportionBar.types";

export function ProportionBarView({
  progress,
  className,
  barClasses,
  variant,
}: ProportionBarViewProps) {
  // Proportion bar type
  const [fullSegments, partialSegment] = progress.split("-").map(Number);
  const segmented = variant === "segmented";
  // Calculate total progress:
  // - For 1-X: first section is (X+1)/6 filled
  // - For 2-X: first section full, second section X/3 filled
  // - For 3-X: first two sections full, third section X/3 filled
  // Max is 3 full segments = 9 units
  let totalProgress = 0;
  if (fullSegments === 1) {
    totalProgress = (partialSegment + 1) / 6; // 1/6 to 6/6 of first section
  } else if (fullSegments === 2) {
    totalProgress = 1 + partialSegment / 3; // 1 full + 0/3 to 2/3 of second
  } else if (fullSegments === 3) {
    totalProgress = 2 + partialSegment / 3; // 2 full + 0/3 to 2/3 of third
  }
  const maxProgress = 3;
  const progressPercentage = Math.round((totalProgress / maxProgress) * 100);
  // Check if at 100% completion (all 3 segments fully filled)
  // Note: Current type system max is "3-2" (88.9%), true 100% would require "3-3" or all segments fully filled
  const isFull = totalProgress >= maxProgress;
  // Generate descriptive aria-label
  const ariaLabelText = isFull
    ? "Progress: Complete (100%)"
    : fullSegments === 3 && partialSegment === 2
      ? `Progress: ${fullSegments} segments complete, maximum state (${progressPercentage}%)`
      : fullSegments === 3
        ? `Progress: ${fullSegments} segments, ${partialSegment} of 3 parts filled (${progressPercentage}%)`
        : fullSegments === 2
          ? `Progress: ${fullSegments} segments, ${partialSegment} of 3 parts filled (${progressPercentage}%)`
          : `Progress: ${fullSegments} segment, ${partialSegment + 1} of 6 parts filled (${progressPercentage}%)`;

  return (
    <div
      className={`${barClasses} ${className}`}
      role="progressbar"
      aria-valuenow={totalProgress}
      aria-valuemin={0}
      aria-valuemax={3}
      aria-label={ariaLabelText}
    >
      {/* Background layer - 3 segments */}
      <div className="absolute inset-0 flex gap-[var(--spacing-scale-008)] px-[4px]">
        <div className="flex-1 h-full bg-[var(--color-surface-default-secondary)] rounded-l-[var(--radius-full)]" />
        <div className="flex-1 h-full bg-[var(--color-surface-default-secondary)]" />
        <div className="flex-1 h-full bg-[var(--color-surface-default-secondary)] rounded-r-[var(--radius-full)]" />
      </div>

      {/* Fill layer - always show 3 sections, fill amount varies */}
      <div className="absolute inset-0 flex gap-[var(--spacing-scale-008)] px-[4px] overflow-hidden">
        {/* First section - for 1-X: (X+1)/6 filled, for 2-X and 3-X: fully filled */}
        <div className="flex-1 h-full relative">
          {fullSegments === 1 ? (
            <div
              className={`absolute inset-y-0 left-0 bg-[var(--color-content-default-brand-primary)] rounded-l-[var(--radius-full)] ${
                segmented && partialSegment < 5
                  ? "rounded-r-[var(--radius-full)]"
                  : ""
              }`.trim()}
              style={{ width: `${((partialSegment + 1) / 6) * 100}%` }}
            />
          ) : fullSegments >= 2 ? (
            <div className="absolute inset-0 bg-[var(--color-content-default-brand-primary)] rounded-l-[var(--radius-full)]" />
          ) : null}
        </div>
        {/* Second section - for 2-X: X/3 filled, for 3-X: fully filled, otherwise empty */}
        <div className="flex-1 h-full relative">
          {fullSegments === 2 ? (
            partialSegment > 0 ? (
              <div
                className={`absolute inset-y-0 left-0 bg-[var(--color-content-default-brand-primary)] ${
                  segmented
                    ? "rounded-l-[var(--radius-full)] rounded-r-[var(--radius-full)]"
                    : ""
                }`.trim()}
                style={{ width: `${(partialSegment / 3) * 100}%` }}
              />
            ) : null
          ) : fullSegments >= 3 ? (
            <div className="absolute inset-0 bg-[var(--color-content-default-brand-primary)]" />
          ) : null}
        </div>
        {/* Third section - for 3-X: X/3 filled, otherwise empty */}
        {/* Round right corner when at 100% (third section fully filled, partialSegment === 3) */}
        <div className="flex-1 h-full relative">
          {fullSegments === 3 && partialSegment > 0 ? (
            <div
              className={`absolute inset-y-0 left-0 bg-[var(--color-content-default-brand-primary)] ${
                segmented
                  ? "rounded-l-[var(--radius-full)] rounded-r-[var(--radius-full)]"
                  : partialSegment >= 3
                    ? "rounded-r-[var(--radius-full)]"
                    : ""
              }`.trim()}
              style={{ width: `${Math.min((partialSegment / 3) * 100, 100)}%` }}
            />
          ) : null}
        </div>
      </div>
    </div>
  );
}