import React, { useMemo } from 'react';
import { Card, CardContent, CardHeader, CardTitle, CardDescription } from '@/components/ui/card';
import { Slider } from '@/components/ui/slider';
import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select';
import { Badge } from '@/components/ui/badge';
import { Separator } from '@/components/ui/separator';
import { useWindStore } from '@/store/appStore';
import { calculateDome, type DomeType } from '@/lib/modules/dome';
import Dome3DViewer from '@/components/three/Dome3D';
import SceneCapturePanel from '../components/SceneCapturePanel';
import ExportMenu from '../components/ExportMenu';
import { EducationalManual } from '@/components/EducationalManual';
import { exportGenericToPDF, type GenericPDFSection } from '../lib/export-generic-pdf';

const DomeModule: React.FC = () => {
  const { vk, cpi } = useWindStore();
  const [diameter, setDiameter] = React.useState(20);
  const [rise, setRise] = React.useState(5);
  const [wallHeight, setWallHeight] = React.useState(8);
  const [type, setType] = React.useState<DomeType>('on-ground');

  const result = useMemo(() => calculateDome({ d: diameter, f: rise, h: wallHeight, vk, type, cpi }), [diameter, rise, wallHeight, vk, type, cpi]);

  const handleExportPDF = () => {
    const sections: GenericPDFSection[] = [
      {
        title: 'Geometria da Cúpula',
        type: 'grid',
        gridItems: [
          { label: 'Tipo', value: type === 'on-ground' ? 'Sobre terreno' : 'Sobre parede cilíndrica' },
          { label: 'Diâmetro (d)', value: `${diameter} m` },
          { label: 'Flecha (f)', value: `${rise} m` },
          ...(type === 'on-cylinder' ? [{ label: 'Altura da parede', value: `${wallHeight} m` }] : []),
          { label: 'f/d', value: result.fOverD.toFixed(3) },
        ],
      },
      {
        title: 'Coeficientes de Pressão (Cpe)',
        type: 'grid',
        gridItems: [
          { label: 'Barlavento', value: result.cpeBarlavento.toFixed(2) },
          { label: 'Topo', value: result.cpeTopo.toFixed(2) },
          { label: 'Lateral', value: result.cpeLateral.toFixed(2) },
        ],
      },
      {
        title: 'Pressões p (kN/m²)',
        type: 'grid',
        gridItems: [
          { label: 'Barlavento', value: (result.q * (result.cpeBarlavento - cpi)).toFixed(3) },
          { label: 'Topo', value: (result.q * (result.cpeTopo - cpi)).toFixed(3) },
          { label: 'Lateral', value: (result.q * (result.cpeLateral - cpi)).toFixed(3) },
        ],
      },
      ...(result.liftCoefficient > 0 ? [{
        title: 'Força de Sustentação',
        type: 'grid' as const,
        gridItems: [
          { label: 'Coeficiente', value: result.liftCoefficient.toFixed(2) },
          { label: 'Força', value: `${result.liftForceKN.toFixed(2)} kN` },
        ],
      }] : []),
    ];
    exportGenericToPDF('Cúpula', sections);
  };

  return (
    <div className="flex flex-col lg:flex-row h-full w-full gap-4 p-4 lg:p-6 bg-muted/30">
      {/* Coluna Esquerda: Controles */}
      <div className="w-full lg:w-80 shrink-0 flex flex-col gap-4 overflow-y-auto pb-8 lg:pb-0">
        <Card className="shadow-sm border-border">
          <CardHeader className="pb-3">
            <CardTitle className="text-lg">Cúpula</CardTitle>
            <CardDescription>Sec. 6.2.4 — silos, reservatórios, ginásios.</CardDescription>
          </CardHeader>
          <CardContent className="space-y-6">
            <div className="space-y-2">
              <label className="text-sm font-medium">Tipo</label>
              <Select value={type} onValueChange={(v) => setType(v as DomeType)}>
                <SelectTrigger><SelectValue /></SelectTrigger>
                <SelectContent>
                  <SelectItem value="on-ground">Sobre terreno (Tab. 21)</SelectItem>
                  <SelectItem value="on-cylinder">Sobre parede cilíndrica (Tab. 22)</SelectItem>
                </SelectContent>
              </Select>
            </div>
            <div className="space-y-3">
              <div className="flex justify-between"><label className="text-sm font-medium">Diâmetro (d)</label><span className="font-mono text-sm">{diameter} m</span></div>
              <Slider min={5} max={80} step={1} value={[diameter]} onValueChange={(v) => setDiameter(v[0])} />
            </div>
            <div className="space-y-3">
              <div className="flex justify-between"><label className="text-sm font-medium">Flecha (f)</label><span className="font-mono text-sm">{rise} m</span></div>
              <Slider min={0.5} max={Math.min(diameter / 4, 25)} step={0.5} value={[rise]} onValueChange={(v) => setRise(v[0])} />
            </div>
            {type === 'on-cylinder' && (
              <div className="space-y-3">
                <div className="flex justify-between"><label className="text-sm font-medium">Altura da parede</label><span className="font-mono text-sm">{wallHeight} m</span></div>
                <Slider min={0} max={30} step={0.5} value={[wallHeight]} onValueChange={(v) => setWallHeight(v[0])} />
              </div>
            )}
            <Separator />
            <div className="rounded-md border bg-muted/40 p-3 text-xs space-y-1">
              <div className="flex justify-between"><span>f/d:</span><span className="font-mono">{result.fOverD.toFixed(3)}</span></div>
              <div className="flex justify-between"><span>Vₖ:</span><span className="font-mono">{vk.toFixed(2)} m/s</span></div>
              <div className="flex justify-between"><span>q:</span><span className="font-mono">{result.q.toFixed(4)} kN/m²</span></div>
              {result.liftCoefficient > 0 && (
                <div className="flex justify-between"><span>F sustentação:</span><span className="font-mono font-semibold">{result.liftForceKN.toFixed(2)} kN</span></div>
              )}
            </div>
          </CardContent>
        </Card>
      </div>

      {/* Coluna Central: 3D */}
      <div className="flex-1 flex flex-col min-h-[500px] lg:min-h-0 bg-background rounded-xl border border-border shadow-sm overflow-hidden relative">
        <div className="absolute top-4 left-4 z-10 flex gap-2">
          <Badge variant="secondary" className="bg-background/80 backdrop-blur-sm">f/d = {result.fOverD.toFixed(2)}</Badge>
          <Badge variant="outline" className="bg-background/80 backdrop-blur-sm">
            Cpi = {cpi.toFixed(2)}
          </Badge>
        </div>
        <div className="absolute top-4 right-4 z-10">
          <EducationalManual type="dome" params={{ rise, diameter, cpi }} />
        </div>
        <div className="w-full h-full bg-muted/20">
          <Dome3DViewer
            diameter={diameter}
            rise={rise}
            wallHeight={wallHeight}
            cpi={cpi}
            cpeBarlavento={result.cpeBarlavento}
            cpeTopo={result.cpeTopo}
            cpeLateral={result.cpeLateral}
          />
        </div>
      </div>

      {/* Coluna Direita: Resultados */}
      <div className="w-full lg:w-96 shrink-0 flex flex-col gap-4 overflow-y-auto pb-8 lg:pb-0">
        <Card className="shadow-sm border-border">
          <CardHeader className="pb-3">
            <CardTitle className="text-lg">Coeficientes (Cpe)</CardTitle>
            <CardDescription>Por zona da cúpula</CardDescription>
          </CardHeader>
          <CardContent className="space-y-3">
            <div className="grid grid-cols-3 gap-2 text-xs">
              <div className="rounded-md border bg-muted/40 p-2 text-center">
                <div className="text-muted-foreground text-[10px]">Barlavento</div>
                <div className="font-mono font-medium text-lg">{result.cpeBarlavento.toFixed(2)}</div>
              </div>
              <div className="rounded-md border bg-muted/40 p-2 text-center">
                <div className="text-muted-foreground text-[10px]">Topo</div>
                <div className="font-mono font-medium text-lg">{result.cpeTopo.toFixed(2)}</div>
              </div>
              <div className="rounded-md border bg-muted/40 p-2 text-center">
                <div className="text-muted-foreground text-[10px]">Lateral</div>
                <div className="font-mono font-medium text-lg">{result.cpeLateral.toFixed(2)}</div>
              </div>
            </div>
            <Separator />
            <div>
              <h4 className="text-xs font-semibold uppercase text-muted-foreground mb-2">Pressões p (kN/m²)</h4>
              <div className="grid grid-cols-3 gap-2 text-xs">
                <div className="rounded-md border bg-muted/40 p-2 text-center">
                  <div className="text-[10px] text-muted-foreground">Barlavento</div>
                  <div className="font-mono font-medium">{(result.q * (result.cpeBarlavento - cpi)).toFixed(3)}</div>
                </div>
                <div className="rounded-md border bg-muted/40 p-2 text-center">
                  <div className="text-[10px] text-muted-foreground">Topo</div>
                  <div className="font-mono font-medium">{(result.q * (result.cpeTopo - cpi)).toFixed(3)}</div>
                </div>
                <div className="rounded-md border bg-muted/40 p-2 text-center">
                  <div className="text-[10px] text-muted-foreground">Lateral</div>
                  <div className="font-mono font-medium">{(result.q * (result.cpeLateral - cpi)).toFixed(3)}</div>
                </div>
              </div>
            </div>
          </CardContent>
        </Card>
        
        <div className="flex justify-center bg-background rounded-xl border border-border shadow-sm p-4">
          <ExportMenu onExportPDF={handleExportPDF} />
        </div>
        
        <SceneCapturePanel />
      </div>
    </div>
  );
};

export default DomeModule;