import { useState, type ComponentType } from 'react'
import { useTranslation } from '../../i18n'
import { useIsDark } from '../../hooks/useIsDark'
import { Puzzle, ListChecks, Wallet, FileText, CalendarDays, Globe, Briefcase, Image, Terminal, Link2, Compass, BookOpen, Sparkles, Luggage, Plane, Bookmark, Users, Loader2, Mountain, CarFront, Search } from 'lucide-react'
import EmptyState from '../shared/EmptyState'
import DawarichIcon from '../shared/DawarichIcon'
import AirTrailIcon from '../shared/AirTrailIcon'
import { DOCUMENT_PROVIDER_ICONS } from '../shared/DocumentProviderIcons'
import AddonTile from './AddonTile'
import AddonSubRow from './AddonSubRow'
import { Tooltip } from '../shared/Tooltip'
import { fs } from '../shared/DialogShell'
import { SettingsCard, StatusPill } from '../Settings/settingsKit'
import { type Addon, type CollabFeatures, COLLAB_SUB_FEATURES, getAddonLabel } from './addons/addonModel'
import { useAddonManager } from './addons/useAddonManager'
import AiAddonTile from './addons/AiAddonTile'
import { ImmichIcon, SynologyIcon } from './addons/PhotoProviderIcons'
import WandererMark from '../Tours/wanderer/WandererMark'

// Keys are the `icon` column from the addons table (see server seeds.ts); anything
// unknown falls back to Puzzle. Users/Sparkles cover collab and llm_parsing, which
// used to land on the fallback.
const ICON_MAP = {
  ListChecks, Wallet, FileText, CalendarDays, Puzzle, Globe, Briefcase, Image, Terminal, Link2, Compass, BookOpen, Plane, Bookmark, Users, Sparkles,
  Mountain,
  // Road trip was seeded as 'Route'; the car says what it is better than a line does.
  Route: CarFront,
  // Dawarich ships a brand mark rather than a lucide name, the same way the photo
  // providers below do. Keyed by the string in the addons table.
  Dawarich: DawarichIcon,
}

const PROVIDER_ICONS: Record<string, ComponentType<{ size?: number }>> = {
  immich: ImmichIcon,
  synologyphotos: SynologyIcon,
  // The document providers' own marks, single-colour so they read as glyphs in
  // a row of lucide icons and invert with the theme.
  ...DOCUMENT_PROVIDER_ICONS,
}

interface AddonIconProps {
  name: string
  size?: number
  /** A switched-off addon greys its icon out, brand marks included. */
  enabled?: boolean
}

function AddonIcon({ name, size = 20, enabled = true }: AddonIconProps) {
  // The brand marks are badges, not glyphs: they fill the framed slot instead of
  // sitting in the middle of it at glyph size, and they grey out when the addon
  // is off — the lucide glyphs get that from the slot's text colour, an <img>
  // has to be told.
  if (name === 'Dawarich') return <DawarichIcon fill muted={!enabled} />
  // 'Plane' is the icon string airtrail was seeded with, and INSERT OR IGNORE
  // means every existing install still carries it — so the brand is keyed on
  // that rather than on a new name no row would ever have.
  if (name === 'Plane') return <AirTrailIcon fill muted={!enabled} />
  const Icon = ICON_MAP[name] || Puzzle
  return <Icon size={size} />
}

/** What each type means, shown on the tile itself now that the sections are gone. The
 *  hint rides along as the tooltip, so "Global" still explains itself. */
const TYPE_META: Record<string, { icon: ComponentType<{ size?: number }>; labelKey: string; hintKey: string }> = {
  trip: { icon: Briefcase, labelKey: 'admin.addons.type.trip', hintKey: 'admin.addons.tripHint' },
  global: { icon: Globe, labelKey: 'admin.addons.type.global', hintKey: 'admin.addons.globalHint' },
  integration: { icon: Link2, labelKey: 'admin.addons.type.integration', hintKey: 'admin.addons.integrationHint' },
}

export default function AddonManager({ bagTrackingEnabled, onToggleBagTracking, collabFeatures, onToggleCollabFeature }: { bagTrackingEnabled?: boolean; onToggleBagTracking?: () => void; collabFeatures?: CollabFeatures; onToggleCollabFeature?: (key: string) => void }) {
  const { t } = useTranslation()
  const dark = useIsDark()
  const {
    addons, loading, handleToggle, tripAddons, globalAddons, integrationAddons, aiAddons, providerOptions, documentProviderOptions,
    toursWanderer,
    toggleToursWanderer,
    mapSwitches,
  } = useAddonManager()
  const [query, setQuery] = useState('')
  const [view, setView] = useState<AddonView>('all')

  if (loading) {
    return (
      <SettingsCard icon={Puzzle} title={t('admin.addons.title')}>
        <div className="grid place-items-center py-14">
          <Loader2 size={22} className="animate-spin text-content-faint" />
        </div>
      </SettingsCard>
    )
  }

  /** Bag tracking, the collab features and the photo providers all hang off their
   *  parent as shelf rows, and each shelf only shows while its parent is on —
   *  a provider toggled under a disabled Journey would hit the server's 409. */
  const shelfFor = (addon: Addon) => {
    if (addon.id === 'packing' && addon.enabled && onToggleBagTracking) {
      return (
        <AddonSubRow
          icon={<Luggage size={14} />}
          title={t('admin.bagTracking.title')}
          description={t('admin.bagTracking.subtitle')}
          enabled={!!bagTrackingEnabled}
          onToggle={onToggleBagTracking}
        />
      )
    }
    if (addon.id === 'collab' && addon.enabled && collabFeatures && onToggleCollabFeature) {
      return COLLAB_SUB_FEATURES.map(feat => {
        const Icon = feat.icon
        return (
          <AddonSubRow
            key={feat.key}
            icon={<Icon size={14} />}
            title={t(feat.titleKey)}
            description={t(feat.subtitleKey)}
            enabled={collabFeatures[feat.key]}
            onToggle={() => onToggleCollabFeature(feat.key)}
          />
        )
      })
    }
    // Document providers are the Documents tile's shelf, the way photo providers
    // are Journey's. Unlike those they carry no credential form here: a document
    // connection belongs to a trip, not to a user, so it is entered in the trip's
    // file manager. The admin decides only whether a provider may be offered.
    if (addon.id === 'documents' && addon.enabled && documentProviderOptions.length > 0) {
      return documentProviderOptions.map(provider => {
        const ProviderIcon = PROVIDER_ICONS[provider.key]
        return (
          <AddonSubRow
            key={provider.key}
            icon={ProviderIcon ? <ProviderIcon size={14} /> : undefined}
            title={provider.label}
            description={provider.description}
            enabled={provider.enabled}
            onToggle={provider.toggle}
          />
        )
      })
    }
    if (addon.id === 'journey' && addon.enabled && providerOptions.length > 0) {
      return providerOptions.map(provider => {
        const ProviderIcon = PROVIDER_ICONS[provider.key]
        return (
          <AddonSubRow
            key={provider.key}
            icon={ProviderIcon ? <ProviderIcon size={14} /> : undefined}
            title={provider.label}
            description={provider.description}
            enabled={provider.enabled}
            onToggle={provider.toggle}
          />
        )
      })
    }
    // An array, not a fragment: the tile counts its rows to fold them behind the
    // "N options" bar the way Collab's and Documents' are.
    if (addon.id === 'tours' && addon.enabled) {
      return [
        <AddonSubRow
          key="wanderer"
          icon={<WandererMark size={14} />}
          title={t('admin.toursWanderer.title')}
          description={t('admin.toursWanderer.subtitle')}
          enabled={toursWanderer}
          onToggle={() => void toggleToursWanderer()}
        />,
        ...mapSwitches.map(({ key, Icon, titleKey, subtitleKey, enabled, toggle }) => (
          <AddonSubRow
            key={key}
            icon={<Icon size={14} />}
            title={t(titleKey)}
            description={t(subtitleKey)}
            enabled={enabled}
            onToggle={() => void toggle()}
          />
        )),
      ]
    }
    return null
  }

  const tile = (addon: Addon) => {
    const label = getAddonLabel(t, addon)
    return (
      <AddonTile
        key={addon.id}
        icon={<AddonIcon name={addon.icon} size={18} enabled={addon.enabled} />}
        name={label.name}
        description={label.description}
        enabled={addon.enabled}
        onToggle={() => handleToggle(addon)}
      >
        {shelfFor(addon)}
      </AddonTile>
    )
  }

  /* A card per type, the way every other admin tab sets its cards: Trip in the
     left column, Global and Integration in the right one, each card with the
     dialogs' head band carrying the type, its count and what it means. Above
     them one card says how many are on and finds an addon by name. */
  const groups = [
    { key: 'trip', addons: tripAddons },
    { key: 'global', addons: globalAddons },
    { key: 'integration', addons: integrationAddons },
  ].filter(g => g.addons.length > 0 || (g.key === 'integration' && aiAddons.length > 0))
  const enabledCount = addons.filter(a => a.type !== 'photo_provider' && a.type !== 'document_provider' && a.enabled).length
  const totalCount = tripAddons.length + globalAddons.length + integrationAddons.length + aiAddons.length

  const subtitle = (
    <span className="inline-flex flex-wrap items-center gap-1">
      {t('admin.addons.subtitleBefore')}
      <img src={dark ? '/text-light.svg' : '/text-dark.svg'} alt="TREK" style={{ height: 10, verticalAlign: 'middle', opacity: 0.7 }} />
      {t('admin.addons.subtitleAfter')}
    </span>
  )

  /** Whether an addon is shown under the search and the filter. */
  const shown = (addon: Addon) => {
    if (view === 'on' && !addon.enabled) return false
    if (view === 'off' && addon.enabled) return false
    const q = query.trim().toLocaleLowerCase()
    if (!q) return true
    const label = getAddonLabel(t, addon)
    return `${label.name} ${label.description ?? ''}`.toLocaleLowerCase().includes(q)
  }

  const card = (g: (typeof groups)[number]) => {
    const meta = TYPE_META[g.key]
    const all = g.key === 'integration' ? [...aiAddons, ...g.addons] : g.addons
    const visible = g.addons.filter(shown)
    const ai = g.key === 'integration' && aiAddons.some(shown)
    if (!visible.length && !ai) return null
    const on = all.filter(a => a.enabled).length
    return (
      <SettingsCard
        key={g.key}
        icon={meta.icon}
        title={t(meta.labelKey)}
        hint={t(meta.hintKey)}
        badge={(
          <Tooltip label={t('admin.addons.group.count', { enabled: on, total: all.length })}>
            <span className="inline-flex"><StatusPill tone={on > 0 ? 'success' : 'neutral'}>{on}/{all.length}</StatusPill></span>
          </Tooltip>
        )}
        bodyClassName="p-3"
      >
        <div className="divide-y divide-edge-faint overflow-hidden rounded-[12px] border border-edge-faint bg-surface-card">
          {/* The AI addons share a connection and a settings dialog, so they head the card as one tile. */}
          {ai && <AiAddonTile addons={aiAddons} onToggle={handleToggle} />}
          {visible.map(tile)}
        </div>
      </SettingsCard>
    )
  }

  const [first, ...rest] = groups
  const cards = { start: first ? card(first) : null, end: rest.map(card).filter(Boolean) }

  return (
    <>
      <SettingsCard
        icon={Puzzle}
        title={t('admin.addons.title')}
        hint={subtitle}
        badge={totalCount > 0 ? (
          <Tooltip label={t('admin.addons.group.count', { enabled: enabledCount, total: totalCount })}>
            <span className="inline-flex">
              <StatusPill tone={enabledCount > 0 ? 'success' : 'neutral'}>{enabledCount}/{totalCount}</StatusPill>
            </span>
          </Tooltip>
        ) : undefined}
      >
        {addons.length === 0
          ? <EmptyState scene="idle" title={t('admin.addons.noAddons')} surface="var(--bg-secondary)" />
          : <AddonToolbar groups={groups.map(g => ({ key: g.key, addons: g.key === 'integration' ? [...aiAddons, ...g.addons] : g.addons }))} query={query} onQuery={setQuery} view={view} onView={setView} t={t} />}
      </SettingsCard>

      {addons.length > 0 && (cards.start || cards.end.length > 0 ? (
        <div className="grid grid-cols-1 gap-x-5 xl:grid-cols-2 xl:items-start">
          <div className="min-w-0">{cards.start}</div>
          <div className="min-w-0">{cards.end}</div>
        </div>
      ) : (
        <p className="m-0 rounded-2xl border border-dashed border-edge-faint px-4 py-8 text-center text-content-muted" style={fs(13, 'body')}>
          {t('admin.addons.noMatch')}
        </p>
      ))}
    </>
  )
}

type AddonView = 'all' | 'on' | 'off'

/**
 * The head card's body: a tile per type with how many of it are on, then a
 * search over the addons' names and descriptions and a switch between all,
 * the ones on and the ones off.
 */
function AddonToolbar({ groups, query, onQuery, view, onView, t }: {
  groups: { key: string; addons: Addon[] }[]
  query: string
  onQuery: (q: string) => void
  view: AddonView
  onView: (v: AddonView) => void
  t: (key: string, params?: Record<string, unknown>) => string
}) {
  return (
    <>
      <div className="grid grid-cols-1 gap-2 sm:grid-cols-3">
        {groups.map(g => {
          const meta = TYPE_META[g.key]
          const Icon = meta.icon
          const on = g.addons.filter(a => a.enabled).length
          return (
            <div key={g.key} className="flex items-center gap-3 rounded-[12px] border border-edge-faint bg-surface-card px-3 py-2.5">
              <span className="grid h-8 w-8 flex-none place-items-center rounded-[10px] bg-surface-secondary text-content-secondary">
                <Icon size={15} />
              </span>
              <span className="min-w-0 flex-1">
                <span className="block truncate font-semibold text-content" style={fs(12.5, 'body')}>{t(meta.labelKey)}</span>
                <span className="block text-content-faint" style={fs(11)}>{t('admin.addons.group.count', { enabled: on, total: g.addons.length })}</span>
              </span>
              <span className={`font-geist font-bold tabular-nums ${on > 0 ? 'text-content' : 'text-content-faint'}`} style={fs(18, 'body')} aria-hidden>{on}</span>
            </div>
          )
        })}
      </div>
      <div className="flex flex-col gap-2 sm:flex-row sm:items-center">
        <label className="relative flex min-w-0 flex-1 items-center">
          <Search size={14} className="pointer-events-none absolute start-3 text-content-faint" />
          <input
            type="search"
            value={query}
            onChange={e => onQuery(e.target.value)}
            placeholder={t('admin.addons.search')}
            aria-label={t('admin.addons.search')}
            className="h-9 w-full rounded-[10px] border border-edge-faint bg-surface-card ps-8 pe-3 text-content outline-none transition-colors placeholder:text-content-faint focus:border-accent"
            style={fs(13, 'body')}
          />
        </label>
        <div className="inline-flex flex-none gap-1 rounded-[10px] bg-surface-tertiary p-1" role="group" aria-label={t('admin.addons.filter')}>
          {(['all', 'on', 'off'] as const).map(v => (
            <button
              key={v}
              type="button"
              onClick={() => onView(v)}
              aria-pressed={view === v}
              className={`h-7 rounded-[8px] px-3 font-medium transition-colors ${view === v ? 'bg-surface-card text-content shadow-sm' : 'text-content-muted hover:text-content'}`}
              style={fs(12.5, 'body')}
            >
              {t(`admin.addons.filter.${v}`)}
            </button>
          ))}
        </div>
      </div>
    </>
  )
}