import { useEffect, useRef, useState } from 'react'
import { Terminal as XTerm } from '@xterm/xterm'
import { FitAddon } from '@xterm/addon-fit'
import '@xterm/xterm/css/xterm.css'
import {
  Play,
  Square,
  RotateCw,
  Pause,
  PlayCircle,
  Trash2,
  RefreshCw,
  TerminalSquare,
  ScrollText,
  X,
} from 'lucide-react'
import {
  api,
  getToken,
  type Container,
  type SshContainer,
  type AgentContainer,
  type ContainerStats,
} from '../lib/api'

const TEXT_PRIMARY = '#E8E6E0'
const TEXT_SECONDARY = '#7A7D85'
const GOLD = '#C8A434'

const cardBase: React.CSSProperties = {
  backgroundColor: 'rgba(10, 10, 12, 0.92)',
  border: '1px solid rgba(200, 164, 52, 0.08)',
  borderRadius: '12px',
  boxShadow: '0 0 20px rgba(200, 164, 52, 0.03)',
}

// docker = Engine TCP API; ssh = `docker` CLI over SSH; agent = pushed report.
// docker/ssh support management; agent is read-only monitoring.
type Source = 'docker' | 'ssh' | 'agent'

/** A selectable container host. For docker/ssh it wraps an integration id; for
 * agent it wraps the string hostId of a reporting agent. */
interface HostOption {
  source: Source
  /** integration id (docker/ssh) or agent hostId (agent), as a string key. */
  key: string
  label: string
  /** numeric integration id for docker/ssh sources. */
  integrationId?: number
  /** agent hostId for agent sources. */
  agentHostId?: string
}

/** Unified table row across all three sources. */
interface Row {
  id: string
  name: string
  image: string
  state: string
  status: string
  ports: string
  /** Stats embedded in agent reports (docker/ssh fetch stats separately/none). */
  embeddedStats?: ContainerStats
}

function toRowFromDocker(c: Container): Row {
  return {
    id: c.id,
    name: c.name,
    image: c.image,
    state: c.state,
    status: c.status,
    ports: c.ports.length === 0 ? '' : c.ports.map((p) => `${p.publicPort ?? ''}${p.publicPort ? ':' : ''}${p.privatePort}/${p.type}`).join(', '),
  }
}

function toRowFromSsh(c: SshContainer): Row {
  return { id: c.id, name: c.name, image: c.image, state: c.state.toLowerCase(), status: c.status, ports: c.ports }
}

function toRowFromAgent(c: AgentContainer): Row {
  const ports = c.ports
    .map((p) => `${p.hostPort ? `${p.hostPort}:` : ''}${p.containerPort}/${p.proto}`)
    .join(', ')
  const embeddedStats: ContainerStats | undefined = c.stats
    ? {
        cpuPercent: c.stats.cpuPercent ?? 0,
        memUsage: c.stats.memUsage ?? 0,
        memLimit: c.stats.memLimit ?? 0,
        netRx: c.stats.netRxBytes ?? 0,
        netTx: c.stats.netTxBytes ?? 0,
      }
    : undefined
  return { id: c.id, name: c.name, image: c.image, state: c.state.toLowerCase(), status: c.status, ports, embeddedStats }
}

function stateColor(state: string): string {
  if (state === 'running') return '#2ECC71'
  if (state === 'paused') return '#E0A82E'
  if (state === 'exited' || state === 'dead') return '#E74C3C'
  return TEXT_SECONDARY
}

function formatBytes(bytes: number): string {
  if (bytes < 1024) return `${bytes} B`
  const units = ['KB', 'MB', 'GB', 'TB']
  let v = bytes
  let i = -1
  do {
    v /= 1024
    i++
  } while (v >= 1024 && i < units.length - 1)
  return `${v.toFixed(1)} ${units[i]}`
}

/** A dynamic detail tab opened by clicking a container name. */
interface DetailTab {
  tabId: string
  source: Source
  integrationId?: number
  agentHostId?: string
  containerId: string
  containerName: string
}

export default function Containers() {
  const [hostOptions, setHostOptions] = useState<HostOption[]>([])
  const [selectedKey, setSelectedKey] = useState<string>('')
  const [rows, setRows] = useState<Row[]>([])
  const [error, setError] = useState<string | null>(null)
  const [loading, setLoading] = useState(false)
  const [busyId, setBusyId] = useState<string | null>(null)
  const [statsById, setStatsById] = useState<Record<string, ContainerStats>>({})
  const [logsRow, setLogsRow] = useState<Row | null>(null)
  const [execRow, setExecRow] = useState<Row | null>(null)

  // Intra-page tabs: the containers list plus any opened container-detail tabs.
  const [detailTabs, setDetailTabs] = useState<DetailTab[]>([])
  const [activeTab, setActiveTab] = useState<string>('list')

  const selected = hostOptions.find((h) => h.key === selectedKey)
  const source: Source | null = selected?.source ?? null
  const canManage = source === 'docker' || source === 'ssh'

  async function loadHosts() {
    const [{ integrations }, agentRes] = await Promise.all([
      api.listIntegrations(),
      api.listAgentHosts().catch(() => ({ hosts: [] })),
    ])
    const opts: HostOption[] = []
    for (const i of integrations) {
      if (i.type === 'docker') opts.push({ source: 'docker', key: `docker:${i.id}`, label: `${i.name} (Docker API)`, integrationId: i.id })
      if (i.type === 'ssh') opts.push({ source: 'ssh', key: `ssh:${i.id}`, label: `${i.name} (SSH)`, integrationId: i.id })
    }
    for (const h of agentRes.hosts) {
      const label = `${h.hostname || h.hostId} (Agent${h.stale ? ' — stale' : ''})`
      opts.push({ source: 'agent', key: `agent:${h.hostId}`, label, agentHostId: h.hostId })
    }
    setHostOptions(opts)
    if (opts.length > 0 && !opts.some((o) => o.key === selectedKey)) setSelectedKey(opts[0].key)
  }

  useEffect(() => {
    loadHosts()
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [])

  function refresh() {
    if (!selected) return
    setLoading(true)
    setError(null)
    setStatsById({})

    if (selected.source === 'agent' && selected.agentHostId) {
      api
        .listAgentContainers(selected.agentHostId)
        .then(({ containers }) => setRows(containers.map(toRowFromAgent)))
        .catch((err) => setError(err instanceof Error ? err.message : 'Failed to load agent report'))
        .finally(() => setLoading(false))
      return
    }

    if (selected.source === 'ssh' && selected.integrationId) {
      api
        .listSshContainers(selected.integrationId)
        .then(({ containers }) => setRows(containers.map(toRowFromSsh)))
        .catch((err) => setError(err instanceof Error ? err.message : 'Failed to list containers'))
        .finally(() => setLoading(false))
      return
    }

    if (selected.source === 'docker' && selected.integrationId) {
      const integrationId = selected.integrationId
      api
        .listContainers(integrationId)
        .then(({ containers }) => {
          setRows(containers.map(toRowFromDocker))
          containers.forEach((c) => {
            if (c.state !== 'running') return
            api
              .containerStats(integrationId, c.id)
              .then((stats) => setStatsById((prev) => ({ ...prev, [c.id]: stats })))
              .catch(() => {})
          })
        })
        .catch((err) => setError(err instanceof Error ? err.message : 'Failed to list containers'))
        .finally(() => setLoading(false))
    }
  }

  useEffect(() => {
    refresh()
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [selectedKey])

  async function runAction(c: Row, action: 'start' | 'stop' | 'restart' | 'pause' | 'unpause') {
    if (!selected?.integrationId) return
    setBusyId(c.id)
    setError(null)
    try {
      if (selected.source === 'ssh') await api.sshContainerAction(selected.integrationId, c.id, action)
      else await api.containerAction(selected.integrationId, c.id, action)
      refresh()
    } catch (err) {
      setError(err instanceof Error ? err.message : `Failed to ${action} container`)
    } finally {
      setBusyId(null)
    }
  }

  async function removeRow(c: Row) {
    if (!selected?.integrationId) return
    if (!confirm(`Remove container "${c.name}"? This cannot be undone.`)) return
    setBusyId(c.id)
    setError(null)
    try {
      if (selected.source === 'ssh') await api.removeSshContainer(selected.integrationId, c.id, c.state === 'running')
      else await api.removeContainer(selected.integrationId, c.id, c.state === 'running')
      refresh()
    } catch (err) {
      setError(err instanceof Error ? err.message : 'Failed to remove container')
    } finally {
      setBusyId(null)
    }
  }

  function openDetail(c: Row) {
    if (!selected) return
    const tabId = `${selected.key}::${c.id}`
    setDetailTabs((prev) => (prev.some((t) => t.tabId === tabId) ? prev : [
      ...prev,
      {
        tabId,
        source: selected.source,
        integrationId: selected.integrationId,
        agentHostId: selected.agentHostId,
        containerId: c.id,
        containerName: c.name,
      },
    ]))
    setActiveTab(tabId)
  }

  function closeDetail(tabId: string) {
    setDetailTabs((prev) => prev.filter((t) => t.tabId !== tabId))
    setActiveTab((cur) => (cur === tabId ? 'list' : cur))
  }

  return (
    <div className="space-y-4">
      <div className="flex items-center justify-between">
        <div>
          <h1 className="text-xl font-semibold" style={{ color: TEXT_PRIMARY }}>
            Containers
          </h1>
          <p className="text-sm" style={{ color: TEXT_SECONDARY }}>
            Manage and monitor Docker containers — via the Docker Engine API, the
            <code> docker</code> CLI over SSH, or a reporting agent.
          </p>
        </div>
        {activeTab === 'list' && (
          <div className="flex items-center gap-2">
            <select
              value={selectedKey}
              onChange={(e) => setSelectedKey(e.target.value)}
              className="rounded-md border border-white/10 bg-transparent px-2 py-1.5 text-sm"
              style={{ color: TEXT_PRIMARY }}
            >
              {hostOptions.length === 0 && <option value="">No container hosts</option>}
              {hostOptions.map((h) => (
                <option key={h.key} value={h.key}>
                  {h.label}
                </option>
              ))}
            </select>
            <button
              onClick={refresh}
              className="flex items-center gap-1 rounded-md px-3.5 py-1.5 text-xs"
              style={{ border: '1px solid rgba(200,164,52,0.2)', color: TEXT_PRIMARY }}
            >
              <RefreshCw size={13} className={loading ? 'animate-spin' : ''} /> Refresh
            </button>
          </div>
        )}
      </div>

      {/* Intra-page tab bar */}
      <div className="flex items-center gap-1 border-b border-white/10">
        <TabButton label="Containers" active={activeTab === 'list'} onClick={() => setActiveTab('list')} />
        {detailTabs.map((t) => (
          <TabButton
            key={t.tabId}
            label={t.containerName}
            active={activeTab === t.tabId}
            onClick={() => setActiveTab(t.tabId)}
            onClose={() => closeDetail(t.tabId)}
          />
        ))}
      </div>

      {error && activeTab === 'list' && (
        <div className="flex items-center justify-between rounded-md px-3 py-2 text-sm" style={{ backgroundColor: 'rgba(231,76,60,0.1)', color: '#E74C3C' }}>
          <span>{error}</span>
          <button onClick={() => setError(null)} style={{ color: TEXT_SECONDARY }}>
            <X size={14} />
          </button>
        </div>
      )}

      {activeTab === 'list' ? (
        <div style={cardBase} className="overflow-hidden">
          <table className="w-full text-sm">
            <thead>
              <tr style={{ color: TEXT_SECONDARY, borderBottom: '1px solid rgba(255,255,255,0.06)' }}>
                <th className="px-3 py-2 text-left font-medium">Name</th>
                <th className="px-3 py-2 text-left font-medium">Image</th>
                <th className="px-3 py-2 text-left font-medium">State</th>
                <th className="px-3 py-2 text-left font-medium">CPU</th>
                <th className="px-3 py-2 text-left font-medium">Memory</th>
                <th className="px-3 py-2 text-left font-medium">Ports</th>
                <th className="px-3 py-2 text-right font-medium">Actions</th>
              </tr>
            </thead>
            <tbody>
              {rows.length === 0 && (
                <tr>
                  <td colSpan={7} className="px-3 py-6 text-center" style={{ color: TEXT_SECONDARY }}>
                    {selected ? 'No containers found.' : 'Select a container host.'}
                  </td>
                </tr>
              )}
              {rows.map((c) => {
                const stats = statsById[c.id] ?? c.embeddedStats
                const busy = busyId === c.id
                return (
                  <tr key={c.id} style={{ borderBottom: '1px solid rgba(255,255,255,0.04)' }}>
                    <td className="px-3 py-2">
                      <button
                        onClick={() => openDetail(c)}
                        className="text-left hover:underline"
                        style={{ color: GOLD }}
                        title="View details"
                      >
                        {c.name}
                      </button>
                    </td>
                    <td className="px-3 py-2" style={{ color: TEXT_SECONDARY }}>
                      {c.image}
                    </td>
                    <td className="px-3 py-2">
                      <span className="flex items-center gap-1.5">
                        <span className="inline-block h-2 w-2 rounded-full" style={{ background: stateColor(c.state) }} />
                        <span style={{ color: TEXT_PRIMARY }}>{c.status}</span>
                      </span>
                    </td>
                    <td className="px-3 py-2" style={{ color: TEXT_SECONDARY }}>
                      {stats ? `${stats.cpuPercent.toFixed(1)}%` : '—'}
                    </td>
                    <td className="px-3 py-2" style={{ color: TEXT_SECONDARY }}>
                      {stats ? `${formatBytes(stats.memUsage)} / ${formatBytes(stats.memLimit)}` : '—'}
                    </td>
                    <td className="px-3 py-2" style={{ color: TEXT_SECONDARY }}>
                      {c.ports || '—'}
                    </td>
                    <td className="px-3 py-2">
                      <div className="flex items-center justify-end gap-1.5">
                        {canManage ? (
                          <>
                            {c.state === 'running' ? (
                              <>
                                <button disabled={busy} onClick={() => runAction(c, 'pause')} title="Pause" style={{ color: TEXT_SECONDARY }}>
                                  <Pause size={14} />
                                </button>
                                <button disabled={busy} onClick={() => runAction(c, 'restart')} title="Restart" style={{ color: TEXT_SECONDARY }}>
                                  <RotateCw size={14} />
                                </button>
                                <button disabled={busy} onClick={() => runAction(c, 'stop')} title="Stop" style={{ color: TEXT_SECONDARY }}>
                                  <Square size={14} />
                                </button>
                                <button disabled={busy} onClick={() => setExecRow(c)} title="Exec terminal" style={{ color: GOLD }}>
                                  <TerminalSquare size={14} />
                                </button>
                              </>
                            ) : c.state === 'paused' ? (
                              <button disabled={busy} onClick={() => runAction(c, 'unpause')} title="Unpause" style={{ color: TEXT_SECONDARY }}>
                                <PlayCircle size={14} />
                              </button>
                            ) : (
                              <button disabled={busy} onClick={() => runAction(c, 'start')} title="Start" style={{ color: TEXT_SECONDARY }}>
                                <Play size={14} />
                              </button>
                            )}
                            <button disabled={busy} onClick={() => setLogsRow(c)} title="Logs" style={{ color: TEXT_SECONDARY }}>
                              <ScrollText size={14} />
                            </button>
                            <button disabled={busy} onClick={() => removeRow(c)} title="Remove" style={{ color: '#E74C3C' }}>
                              <Trash2 size={14} />
                            </button>
                          </>
                        ) : (
                          <span className="text-xs" style={{ color: TEXT_SECONDARY }}>read-only</span>
                        )}
                      </div>
                    </td>
                  </tr>
                )
              })}
            </tbody>
          </table>
        </div>
      ) : (
        (() => {
          const tab = detailTabs.find((t) => t.tabId === activeTab)
          if (!tab) return null
          return <ContainerDetail key={tab.tabId} tab={tab} />
        })()
      )}

      {logsRow && selected?.integrationId && (source === 'docker' || source === 'ssh') && (
        <LogsModal source={source} integrationId={selected.integrationId} row={logsRow} onClose={() => setLogsRow(null)} />
      )}
      {execRow && selected?.integrationId && (source === 'docker' || source === 'ssh') && (
        <ExecModal source={source} integrationId={selected.integrationId} row={execRow} onClose={() => setExecRow(null)} />
      )}
    </div>
  )
}

function TabButton({ label, active, onClick, onClose }: { label: string; active: boolean; onClick: () => void; onClose?: () => void }) {
  return (
    <div
      onClick={onClick}
      className="flex cursor-pointer items-center gap-2 rounded-t-md px-3 py-1.5 text-xs"
      style={{
        color: active ? GOLD : TEXT_SECONDARY,
        borderBottom: active ? `2px solid ${GOLD}` : '2px solid transparent',
        maxWidth: '200px',
      }}
    >
      <span className="truncate">{label}</span>
      {onClose && (
        <X
          size={12}
          onClick={(e) => {
            e.stopPropagation()
            onClose()
          }}
        />
      )}
    </div>
  )
}

function DetailRow({ label, value }: { label: string; value: React.ReactNode }) {
  return (
    <div className="flex gap-3 py-1 text-sm">
      <span className="w-40 shrink-0" style={{ color: TEXT_SECONDARY }}>{label}</span>
      <span className="min-w-0 break-words" style={{ color: TEXT_PRIMARY }}>{value}</span>
    </div>
  )
}

function Section({ title, children }: { title: string; children: React.ReactNode }) {
  return (
    <div style={cardBase} className="p-4">
      <h3 className="mb-2 text-xs font-medium uppercase tracking-wide" style={{ color: TEXT_SECONDARY }}>{title}</h3>
      {children}
    </div>
  )
}

/**
 * Container detail tab. Agent reports carry the full inspect+stats payload, so
 * for agent hosts we render everything. For docker/ssh sources we currently
 * only have the list row data, so we show what we have and note the rest is
 * available from an agent — graceful degradation per the design.
 */
function ContainerDetail({ tab }: { tab: DetailTab }) {
  const [container, setContainer] = useState<AgentContainer | null>(null)
  const [loading, setLoading] = useState(tab.source === 'agent')
  const [error, setError] = useState<string | null>(null)

  useEffect(() => {
    if (tab.source !== 'agent' || !tab.agentHostId) return
    setLoading(true)
    api
      .getAgentContainer(tab.agentHostId, tab.containerId)
      .then(({ container }) => setContainer(container))
      .catch((err) => setError(err instanceof Error ? err.message : 'Failed to load container detail'))
      .finally(() => setLoading(false))
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [tab.tabId])

  if (tab.source !== 'agent') {
    return (
      <div style={cardBase} className="p-4">
        <p className="text-sm" style={{ color: TEXT_PRIMARY }}>{tab.containerName}</p>
        <p className="mt-2 text-sm" style={{ color: TEXT_SECONDARY }}>
          Rich container detail (inspect data, mounts, networks, environment) is
          provided by the monitoring agent. This host is a{' '}
          {tab.source === 'ssh' ? 'Docker-over-SSH' : 'Docker API'} source — use the
          list view actions for management, or install the ArchNest agent on this
          host for full detail.
        </p>
      </div>
    )
  }

  if (loading) return <p className="text-sm" style={{ color: TEXT_SECONDARY }}>Loading…</p>
  if (error) return <p className="text-sm" style={{ color: '#E74C3C' }}>{error}</p>
  if (!container) return <p className="text-sm" style={{ color: TEXT_SECONDARY }}>No data.</p>

  const c = container
  const masked = (v: string) => v

  return (
    <div className="grid gap-4" style={{ gridTemplateColumns: 'repeat(auto-fit, minmax(320px, 1fr))' }}>
      <Section title="Overview">
        <DetailRow label="Name" value={c.name} />
        <DetailRow label="Image" value={c.image} />
        {c.imageId && <DetailRow label="Image ID" value={<code className="text-xs">{c.imageId.slice(0, 19)}</code>} />}
        <DetailRow label="Container ID" value={<code className="text-xs">{c.id.slice(0, 12)}</code>} />
        {c.command && <DetailRow label="Command" value={<code className="text-xs">{c.command}</code>} />}
        {c.createdAt && <DetailRow label="Created" value={new Date(c.createdAt).toLocaleString()} />}
        {c.startedAt && <DetailRow label="Started" value={new Date(c.startedAt).toLocaleString()} />}
      </Section>

      <Section title="State & Health">
        <DetailRow
          label="State"
          value={
            <span className="flex items-center gap-1.5">
              <span className="inline-block h-2 w-2 rounded-full" style={{ background: stateColor(c.state.toLowerCase()) }} />
              {c.status || c.state}
            </span>
          }
        />
        {c.health && c.health !== 'none' && <DetailRow label="Health" value={c.health} />}
        <DetailRow label="Restart count" value={String(c.restartCount ?? 0)} />
        {c.restartPolicy && <DetailRow label="Restart policy" value={c.restartPolicy} />}
      </Section>

      {c.stats && (
        <Section title="Stats (snapshot)">
          <DetailRow label="CPU" value={`${(c.stats.cpuPercent ?? 0).toFixed(1)}%`} />
          <DetailRow label="Memory" value={`${formatBytes(c.stats.memUsage ?? 0)} / ${formatBytes(c.stats.memLimit ?? 0)}`} />
          <DetailRow label="Network" value={`↓ ${formatBytes(c.stats.netRxBytes ?? 0)}  ↑ ${formatBytes(c.stats.netTxBytes ?? 0)}`} />
          <DetailRow label="Block I/O" value={`R ${formatBytes(c.stats.blockReadBytes ?? 0)}  W ${formatBytes(c.stats.blockWriteBytes ?? 0)}`} />
        </Section>
      )}

      <Section title="Ports">
        {c.ports.length === 0 ? (
          <p className="text-sm" style={{ color: TEXT_SECONDARY }}>None published.</p>
        ) : (
          c.ports.map((p, i) => (
            <DetailRow key={i} label={`${p.containerPort}/${p.proto}`} value={p.hostPort ? `${p.hostIp || '0.0.0.0'}:${p.hostPort}` : 'not published'} />
          ))
        )}
      </Section>

      <Section title="Networks">
        {c.networks.length === 0 ? (
          <p className="text-sm" style={{ color: TEXT_SECONDARY }}>None.</p>
        ) : (
          c.networks.map((n, i) => <DetailRow key={i} label={n.name} value={n.ip || '—'} />)
        )}
      </Section>

      <Section title="Mounts">
        {c.mounts.length === 0 ? (
          <p className="text-sm" style={{ color: TEXT_SECONDARY }}>None.</p>
        ) : (
          c.mounts.map((m, i) => (
            <DetailRow key={i} label={m.destination || '—'} value={`${m.source || ''}${m.rw === false ? ' (ro)' : ''}`} />
          ))
        )}
      </Section>

      <Section title="Environment">
        {c.env.length === 0 ? (
          <p className="text-sm" style={{ color: TEXT_SECONDARY }}>None.</p>
        ) : (
          c.env.map((e, i) => <DetailRow key={i} label={e.key} value={<code className="text-xs">{masked(e.value)}</code>} />)
        )}
      </Section>

      {c.labels && Object.keys(c.labels).length > 0 && (
        <Section title="Labels">
          {Object.entries(c.labels).map(([k, v]) => (
            <DetailRow key={k} label={k} value={<span className="text-xs">{v}</span>} />
          ))}
        </Section>
      )}
    </div>
  )
}

function LogsModal({ source, integrationId, row, onClose }: { source: 'docker' | 'ssh'; integrationId: number; row: Row; onClose: () => void }) {
  const [logs, setLogs] = useState('')
  const [loading, setLoading] = useState(true)
  const [error, setError] = useState<string | null>(null)

  function load() {
    setLoading(true)
    setError(null)
    const req = source === 'ssh' ? api.sshContainerLogs(integrationId, row.id) : api.containerLogs(integrationId, row.id)
    req
      .then(({ logs }) => setLogs(logs))
      .catch((err) => setError(err instanceof Error ? err.message : 'Failed to fetch logs'))
      .finally(() => setLoading(false))
  }

  useEffect(load, [])

  return (
    <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/60 p-6">
      <div style={cardBase} className="flex h-[70vh] w-full max-w-3xl flex-col p-4">
        <div className="mb-2 flex items-center justify-between">
          <h2 className="text-sm font-medium" style={{ color: TEXT_PRIMARY }}>
            Logs — {row.name}
          </h2>
          <div className="flex items-center gap-2">
            <button onClick={load} style={{ color: TEXT_SECONDARY }} title="Refresh">
              <RefreshCw size={14} className={loading ? 'animate-spin' : ''} />
            </button>
            <button onClick={onClose} style={{ color: TEXT_SECONDARY }}>
              <X size={16} />
            </button>
          </div>
        </div>
        {error && <p className="mb-2 text-xs" style={{ color: '#E74C3C' }}>{error}</p>}
        <pre className="min-h-0 flex-1 overflow-auto whitespace-pre-wrap rounded-md p-3 text-xs" style={{ backgroundColor: '#0A0A0C', color: TEXT_PRIMARY }}>
          {logs || (loading ? 'Loading…' : 'No logs.')}
        </pre>
      </div>
    </div>
  )
}

function ExecModal({ source, integrationId, row, onClose }: { source: 'docker' | 'ssh'; integrationId: number; row: Row; onClose: () => void }) {
  const containerRef = useRef<HTMLDivElement>(null)
  const wsRef = useRef<WebSocket | null>(null)
  const [connected, setConnected] = useState(false)

  useEffect(() => {
    if (!containerRef.current) return
    const term = new XTerm({
      cursorBlink: true,
      fontSize: 13,
      fontFamily: 'ui-monospace, SFMono-Regular, Menlo, monospace',
      theme: { background: '#15161A', foreground: '#E8E6E0', cursor: GOLD },
    })
    const fit = new FitAddon()
    term.loadAddon(fit)
    term.open(containerRef.current)
    fit.fit()

    const isSsh = source === 'ssh'
    const token = getToken()
    const proto = window.location.protocol === 'https:' ? 'wss' : 'ws'
    const path = isSsh ? '/api/docker-ssh/exec' : '/api/docker/exec'
    const ws = new WebSocket(`${proto}://${window.location.host}${path}?token=${encodeURIComponent(token ?? '')}`)
    wsRef.current = ws

    ws.onopen = () => {
      ws.send(JSON.stringify({ type: 'connect', integrationId, containerId: row.id, cols: term.cols, rows: term.rows }))
    }
    ws.onmessage = (event) => {
      const msg = JSON.parse(event.data)
      if (msg.type === 'ready') {
        setConnected(true)
      } else if (msg.type === 'data') {
        if (isSsh) term.write(msg.data as string)
        else term.write(Uint8Array.from(atob(msg.data), (c) => c.charCodeAt(0)))
      } else if (msg.type === 'error') {
        term.writeln(`\r\n\x1b[31mError: ${msg.message}\x1b[0m`)
        setConnected(false)
      } else if (msg.type === 'exit') {
        term.writeln('\r\n\x1b[33mSession ended.\x1b[0m')
        setConnected(false)
      }
    }
    ws.onclose = () => setConnected(false)

    term.onData((data) => {
      if (ws.readyState !== WebSocket.OPEN) return
      ws.send(JSON.stringify({ type: 'input', data: isSsh ? data : btoa(data) }))
    })
    term.onResize(({ cols, rows }) => {
      if (ws.readyState === WebSocket.OPEN) ws.send(JSON.stringify({ type: 'resize', cols, rows }))
    })

    const onResize = () => fit.fit()
    window.addEventListener('resize', onResize)
    return () => {
      window.removeEventListener('resize', onResize)
      if (ws.readyState === WebSocket.OPEN) ws.send(JSON.stringify({ type: 'disconnect' }))
      ws.close()
      term.dispose()
    }
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [])

  return (
    <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/60 p-6">
      <div style={cardBase} className="flex h-[70vh] w-full max-w-3xl flex-col p-4">
        <div className="mb-2 flex items-center justify-between">
          <h2 className="flex items-center gap-2 text-sm font-medium" style={{ color: TEXT_PRIMARY }}>
            <span className="inline-block h-2 w-2 rounded-full" style={{ background: connected ? '#2ECC71' : '#7A7D85' }} />
            Exec — {row.name}
          </h2>
          <button onClick={onClose} style={{ color: TEXT_SECONDARY }}>
            <X size={16} />
          </button>
        </div>
        <div ref={containerRef} className="min-h-0 flex-1" />
      </div>
    </div>
  )
}