'use client'

import { useEffect, useState } from 'react'
import { Badge } from '@/components/ui/badge'
import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card'
import type { CrewDto, CrewState } from '@/lib/game/save'

// CREW tab — the ship's roster: starting crew plus members found while exploring. Fetches
// /api/crew on mount; Radix unmounts inactive tabs, so opening this tab always refetches
// (no polling needed — turn-based game). Display-only for now: no dismiss/assign actions yet.

// Spec §8: the three combat traits that carry no duration effect yet — their effect lands
// with the encounters iteration, so the trait line labels them encounter-ready (STANDBY).
// The label is additive — the original name always appears in the text unchanged.
const STANDBY_TRAITS = new Set(['SHARP SHOOTER', 'SHORT FUSE', 'JINXED IN A DOGFIGHT'])
const standbyLabel = (trait: string) => (STANDBY_TRAITS.has(trait) ? `${trait} (STANDBY — encounter-ready)` : trait)

interface CrewPanelProps {
  narrow?: boolean
}

export function CrewPanel({ narrow }: CrewPanelProps) {
  const [roster, setRoster] = useState<CrewDto[] | null>(null)
  const [error, setError] = useState<string | null>(null)

  useEffect(() => {
    let cancelled = false
    fetch('/api/crew')
      .then(async (res) => {
        if (!res.ok) throw new Error(`HTTP ${res.status}`)
        return (await res.json()) as CrewState // { crew, tasks } — the endpoint wraps the roster (JC-7)
      })
      .then((r) => {
        if (!cancelled) setRoster(r.crew)
      })
      .catch((err: unknown) => {
        if (!cancelled) setError(err instanceof Error ? err.message : String(err))
      })
    return () => {
      cancelled = true
    }
  }, [])

  if (error && !roster) {
    return (
      <div style={{ border: '1px solid var(--border)', background: 'var(--surface)', padding: '0.75rem' }}>
        <span style={{ fontSize: '0.62rem', color: 'var(--color-red)', letterSpacing: '0.08em' }}>
          CREW MANIFEST OFFLINE // {error.toUpperCase()}
        </span>
      </div>
    )
  }

  if (!roster) {
    return (
      <div style={{ border: '1px solid var(--border)', background: 'var(--surface)', padding: '0.75rem' }}>
        <span style={{ fontSize: '0.62rem', color: 'var(--text-muted)', letterSpacing: '0.12em' }}>LOADING CREW MANIFEST…</span>
      </div>
    )
  }

  return (
    <div
      style={{
        display: 'grid',
        gridTemplateColumns: narrow ? '1fr' : 'repeat(2, 1fr)',
        gap: '0.75rem',
      }}
    >
      {roster.map((member) => (
        <Card key={member.id}>
          <CardHeader>
            <div style={{ display: 'flex', alignItems: 'center' }}>
              <CardTitle>{member.name}</CardTitle>
              <Badge variant="ACTIVE" className="ml-auto">
                ACTIVE
              </Badge>
            </div>
            <p
              style={{
                fontSize: '0.6rem',
                color: 'var(--text-muted)',
                letterSpacing: '0.1em',
                textTransform: 'uppercase',
              }}
            >
              {member.role}
            </p>
            {/* The member's four skill levels, fixed order (JC-27) — one `·`-separated line. */}
            <p style={{ fontSize: '0.6rem', color: 'var(--text-secondary)', letterSpacing: '0.08em' }}>
              {member.skills.map((s) => `${s.skill} L${s.level}`).join(' · ')}
            </p>
            {/* The title only exists at L3+ (SENIOR) / L5 (MASTER) — titleFor returns null below. */}
            {member.title !== null && (
              <p style={{ fontSize: '0.62rem', color: 'var(--color-green)', letterSpacing: '0.1em' }}>
                {member.title}
              </p>
            )}
          </CardHeader>
          <CardContent style={{ display: 'flex', flexDirection: 'column', gap: '0.4rem' }}>
            <div style={{ fontSize: '0.7rem', letterSpacing: '0.05em' }}>
              <span style={{ color: 'var(--color-green)' }}>+ </span>
              <span style={{ color: 'var(--text-secondary)' }}>{standbyLabel(member.traitGood)}</span>
            </div>
            <div style={{ fontSize: '0.7rem', letterSpacing: '0.05em' }}>
              <span style={{ color: 'var(--color-red)' }}>- </span>
              <span style={{ color: 'var(--text-secondary)' }}>{standbyLabel(member.traitBad)}</span>
            </div>
            <p style={{ fontSize: '0.6rem', color: 'var(--text-muted)', letterSpacing: '0.08em' }}>
              ORIGIN // {member.origin.toUpperCase()}
            </p>
          </CardContent>
        </Card>
      ))}
    </div>
  )
}