import { WEATHER } from '@meteo-exam/shared'
import { h, mount } from '../dom'

const SVG_NS = 'http://www.w3.org/2000/svg'

function svgEl<K extends keyof SVGElementTagNameMap>(
  tag: K,
  attrs: Record<string, string | number> = {},
): SVGElementTagNameMap[K] {
  const el = document.createElementNS(SVG_NS, tag)
  for (const [key, value] of Object.entries(attrs)) el.setAttribute(key, String(value))
  return el
}

interface Region {
  id: string
  subject: string
  kind: keyof typeof WEATHER
  weight: number
  desc: string
  d: string
  labelX: number
  labelY: number
  emojiX: number
  emojiY: number
}

const REGIONS: Region[] = [
  { id: 'maths', subject: 'Mathématiques', kind: 'tempete', weight: 4, d: 'M 150,40 Q 250,20 350,50 L 320,160 Q 220,180 160,150 Z', labelX: 230, labelY: 120, emojiX: 230, emojiY: 90, desc: 'Avis de forte tempête. Contrôle continu à fort coefficient programmé.' },
  { id: 'svt', subject: 'SVT', kind: 'vent', weight: 2, d: 'M 350,50 Q 460,80 440,200 L 310,220 Q 300,160 320,160 Z', labelX: 375, labelY: 160, emojiX: 375, emojiY: 130, desc: 'Risque de petit QCM surprise en début d’heure sur le chapitre de la géologie.' },
  { id: 'physique', subject: 'Physique-Chimie', kind: 'brouillard', weight: 2, d: 'M 160,150 Q 220,180 310,220 L 280,320 Q 180,310 140,240 Z', labelX: 220, labelY: 255, emojiX: 220, emojiY: 225, desc: 'Suspicion de TP évalué la semaine prochaine. Rumeurs soutenues par la classe.' },
  { id: 'histoire', subject: 'Histoire-Géo', kind: 'soleil', weight: 1, d: 'M 150,40 L 160,150 Q 140,240 60,220 Q 30,120 150,40 Z', labelX: 90, labelY: 160, emojiX: 90, emojiY: 130, desc: 'Conditions idéales. Aucun contrôle prévu d’ici la fin de la semaine.' },
  { id: 'francais', subject: 'Français', kind: 'soleil', weight: 1, d: 'M 140,240 Q 180,310 280,320 L 260,380 Q 120,390 60,220 Z', labelX: 170, labelY: 340, emojiX: 170, emojiY: 315, desc: 'Aucune perturbation à signaler. Cours magistral standard.' },
]

/** Carte SVG par matière — figée, alimentée par les données en phase 2. */
export function renderMap(root: HTMLElement, _rerender: () => void): void {
  let selected = 'maths'

  const detailTitle = h('h3', { class: 'text-base font-black text-slate-100' })
  const detailStatus = h('p', { class: 'text-xs font-bold' })
  const detailCoeff = h('span', { class: 'bg-slate-700 text-slate-200 text-xs font-black px-2.5 py-1 rounded-lg' })
  const detailDesc = h('p', { class: 'text-xs text-slate-300 font-medium leading-relaxed mt-2 pt-2 border-t border-slate-700/60' })
  const detailIcon = h('span', { class: 'text-3xl' })

  const statusClasses: Record<string, string> = {
    tempete: 'text-rose-400',
    orage: 'text-rose-400',
    vent: 'text-amber-400',
    brouillard: 'text-purple-400',
    soleil: 'text-emerald-400',
  }

  const updateDetail = (region: Region): void => {
    const meta = WEATHER[region.kind]
    detailIcon.textContent = meta.icon
    detailTitle.textContent = `Secteur : ${region.subject}`
    detailStatus.textContent = `${meta.title} • ${meta.hint}`
    detailStatus.className = `text-xs font-bold ${statusClasses[region.kind] ?? 'text-slate-400'}`
    detailCoeff.textContent = region.weight > 0 ? `Coeff ${region.weight.toFixed(1)}` : ' Calme'
    detailDesc.textContent = region.desc
  }

  const paths = new Map<string, SVGPathElement>()
  const svg = svgEl('svg', { viewBox: '0 0 500 400' })
  svg.setAttribute('class', 'w-full h-full drop-shadow-md')

  for (const region of REGIONS) {
    const meta = WEATHER[region.kind]
    const path = svgEl('path', {
      id: `region-${region.id}`,
      d: region.d,
      fill: meta.hex,
    })
    path.setAttribute('class', 'map-region')
    path.setAttribute('style', 'transition:all 0.3s cubic-bezier(0.4,0,0.2,1);cursor:pointer;stroke:#0f172a;stroke-width:2.5')

    path.addEventListener('click', () => {
      selected = region.id
      for (const p of paths.values()) p.classList.remove('active-region')
      path.classList.add('active-region')
      updateDetail(region)
    })

    paths.set(region.id, path)
    svg.append(path)

    const emoji = svgEl('text', {
      x: region.emojiX,
      y: region.emojiY,
      'font-size': '22',
      'pointer-events': 'none',
    })
    emoji.textContent = meta.icon
    svg.append(emoji)

    const label = svgEl('text', {
      x: region.labelX,
      y: region.labelY,
      'font-size': '12',
      'font-weight': '900',
      fill: '#ffffff',
      'text-anchor': 'middle',
      'pointer-events': 'none',
    })
    label.textContent = region.subject
    svg.append(label)
  }

  paths.get(selected)?.classList.add('active-region')
  updateDetail(REGIONS[0]!)

  mount(
    root,
    h(
      'div',
      { class: 'space-y-4' },
      h(
        'div',
        { class: 'flex justify-between items-center' },
        h('div', {},
          h('h2', { class: 'text-lg font-black text-slate-100' }, 'Carte Météorologique'),
          h('p', { class: 'text-xs font-semibold text-slate-400' }, 'Secteurs géographiques par matière'),
        ),
        h('span', { class: 'px-2.5 py-1 rounded-full bg-sky-500/10 text-sky-400 text-xs font-bold border border-sky-500/20' },
          'Interactive'),
      ),
      h(
        'div',
        { class: 'bg-slate-900 border border-slate-800 rounded-3xl p-3 shadow-lg relative overflow-hidden aspect-[4/3] flex items-center justify-center' },
        svg,
      ),
      h(
        'div',
        { class: 'bg-slate-800 border border-slate-700 rounded-2xl p-4' },
        h('div', { class: 'flex justify-between items-center mb-2' },
          h('div', { class: 'flex items-center gap-2.5' },
            detailIcon,
            h('div', {}, detailTitle, detailStatus),
          ),
          detailCoeff,
        ),
        detailDesc,
      ),
      h(
        'p',
        { class: 'text-[10px] text-slate-600 font-semibold text-center' },
        'Les secteurs seront alimentés par les données de la classe en phase 2.',
      ),
    ),
  )
}