import { AlertTriangle, Route } from 'lucide-react'
import { useTranslation } from '../../i18n'
import { MapTogglePill } from './MapTogglePill'
import { routeModeIcon } from '../Planner/routeModes'
import { formatDistance } from '../../utils/units'
import type { TripRouteOverview as Overview } from './useTripRouteOverview'
import type { DistanceUnit } from '../../types'

/**
 * Toggle for the whole-trip route overview (#1736). Same frosted shell as the other
 * map controls, so it lines up with the compass and the layer switcher.
 */
export function TripRouteOverviewPill({ active, onToggle }: { active: boolean; onToggle: () => void }) {
  const { t } = useTranslation()
  return (
    <MapTogglePill
      active={active}
      onToggle={onToggle}
      label={active ? t('map.overview.hide') : t('map.overview.show')}
      testId="trip-overview-pill"
      icon={<Route size={17} strokeWidth={2} />}
    />
  )
}

/**
 * The trip's stages and its total distance, read off the overview the map is drawing.
 *
 * One component for both shells: the phone and the desktop place it differently but the
 * rows are the same rows, and a second copy of them is a second thing to keep in step.
 */
export function TripRouteOverviewPanel({ overview, unit, selectedDayId, onSelectDay, maxWidth = 320 }: {
  overview: Overview
  unit: DistanceUnit
  selectedDayId?: number | null
  onSelectDay?: (dayId: number) => void
  /** How wide the card may grow before day names start to ellipsize. */
  maxWidth?: number
}) {
  const { t } = useTranslation()
  if (!overview.days.length) return null
  // Only once the round is over: while it runs every leg still waiting is unrouted too,
  // and the ellipsis on the total already says the number is growing.
  const unrouted = overview.loading ? 0 : (overview.unroutedLegs ?? 0)

  return (
    <div
      data-testid="trip-overview-panel"
      style={{
        pointerEvents: 'auto', borderRadius: 14, overflow: 'hidden',
        background: 'var(--sidebar-bg)',
        backdropFilter: 'blur(20px) saturate(180%)',
        WebkitBackdropFilter: 'blur(20px) saturate(180%)',
        boxShadow: 'var(--sidebar-shadow, 0 4px 16px rgba(0,0,0,0.14))',
        // Sized to its rows rather than to the space available: a trip of short day
        // names left a band of empty card over the map, which on a phone is most of
        // what there is to look at.
        width: 'fit-content', maxWidth,
      }}
    >
      <div style={{ display: 'flex', alignItems: 'baseline', justifyContent: 'space-between', gap: 12, padding: '10px 14px 8px' }}>
        <span className="text-content-muted" style={{ fontSize: 'calc(11px * var(--fs-scale-caption, 1))', textTransform: 'uppercase', letterSpacing: 0.4 }}>
          {t('map.overview.total')}
        </span>
        {/* Same tier as the label beside it: the two read as one line rather than as a
            heading with a number stuck under it. */}
        <span className="text-content" style={{ fontSize: 'calc(11px * var(--fs-scale-caption, 1))', fontWeight: 600 }}>
          {formatDistance(overview.totalDistance / 1000, unit)}
          {/* Still routing: the number is a partial sum, and saying so beats a total
              that silently grows while you read it. */}
          {overview.loading && <span className="text-content-muted" style={{ fontWeight: 400 }}>{' '}…</span>}
        </span>
      </div>
      {/* A leg the router refused stays a straight line and adds nothing to the sum, so
          the total is short by however much road those legs are. Said in words rather than
          left to the reader to notice, because the number is what a fuel estimate starts from. */}
      {unrouted > 0 && (
        <div
          data-testid="trip-overview-unrouted"
          className="text-warning"
          style={{ display: 'flex', alignItems: 'flex-start', gap: 6, padding: '0 14px 8px', fontSize: 'calc(11px * var(--fs-scale-caption, 1))' }}
        >
          <AlertTriangle size={12} style={{ flexShrink: 0, marginTop: 1 }} aria-hidden />
          <span>{t('map.overview.unrouted', { count: unrouted })}</span>
        </div>
      )}
      <div style={{ maxHeight: 220, overflowY: 'auto', borderTop: '1px solid var(--border-primary)' }}>
        {overview.days.map(day => {
          const label = day.title || t('dayplan.dayN', { n: day.dayNumber })
          const dayUnrouted = overview.loading ? 0 : (day.unroutedLegs ?? 0)
          const row = (
            <>
              <span style={{ width: 8, height: 8, borderRadius: 999, background: day.color.line, flexShrink: 0 }} aria-hidden />
              <span className="text-content" style={{ flex: 1, minWidth: 0, overflow: 'hidden', textOverflow: 'ellipsis', whiteSpace: 'nowrap' }}>
                {label}
              </span>
              <span style={{ display: 'inline-flex', alignItems: 'center', gap: 3, flexShrink: 0 }} className="text-content-muted">
                {day.modes.map(mode => {
                  const Icon = routeModeIcon(mode)
                  return <Icon key={mode} size={12} strokeWidth={2} aria-hidden />
                })}
              </span>
              {/* The day's own share of the shortfall, so the reader knows which figure
                  to distrust rather than only that one of them is off. */}
              {dayUnrouted > 0 && (
                <AlertTriangle
                  size={12}
                  className="text-warning"
                  style={{ flexShrink: 0 }}
                  role="img"
                  aria-label={t('map.overview.dayUnrouted', { count: dayUnrouted })}
                />
              )}
              <span className="text-content-muted" style={{ flexShrink: 0, fontVariantNumeric: 'tabular-nums' }}>
                {formatDistance(day.distance / 1000, unit)}
              </span>
            </>
          )
          const style = {
            display: 'flex', alignItems: 'center', gap: 8, width: '100%',
            padding: '7px 14px', textAlign: 'start' as const,
            fontSize: 'calc(12px * var(--fs-scale-body, 1))',
            background: day.dayId === selectedDayId ? 'var(--bg-hover)' : 'transparent',
            border: 'none',
          }
          return onSelectDay ? (
            <button key={day.dayId} type="button" onClick={() => onSelectDay(day.dayId)} style={{ ...style, cursor: 'pointer' }}>
              {row}
            </button>
          ) : (
            <div key={day.dayId} style={style}>{row}</div>
          )
        })}
      </div>
    </div>
  )
}