import { useState } from 'react'
import { decimalToDMS } from '@common/utils/coordinates'
import { ComboBox } from '@common/components/ui/ComboBox'
import { ALL_MODELS } from './OilSpillView'
import type { PredictionModel } from './OilSpillView'

interface PredictionInputSectionProps {
  expanded: boolean
  onToggle: () => void
  incidentCoord: { lon: number; lat: number }
  onCoordChange: (coord: { lon: number; lat: number }) => void
  onMapSelectClick: () => void
  onRunSimulation: () => void
  isRunningSimulation: boolean
  selectedModels: Set<PredictionModel>
  onModelsChange: (models: Set<PredictionModel>) => void
  predictionTime: number
  onPredictionTimeChange: (time: number) => void
  spillType: string
  onSpillTypeChange: (type: string) => void
  oilType: string
  onOilTypeChange: (type: string) => void
  spillAmount: number
  onSpillAmountChange: (amount: number) => void
}

const PredictionInputSection = ({
  expanded,
  onToggle,
  incidentCoord,
  onCoordChange,
  onMapSelectClick,
  onRunSimulation,
  isRunningSimulation,
  selectedModels,
  onModelsChange,
  predictionTime,
  onPredictionTimeChange,
  spillType,
  onSpillTypeChange,
  oilType,
  onOilTypeChange,
  spillAmount,
  onSpillAmountChange,
}: PredictionInputSectionProps) => {
  const [inputMode, setInputMode] = useState<'direct' | 'upload'>('direct')
  const [uploadedImage, setUploadedImage] = useState<string | null>(null)
  const [uploadedFileName, setUploadedFileName] = useState<string>('')

  const handleImageUpload = (e: React.ChangeEvent<HTMLInputElement>) => {
    const file = e.target.files?.[0]
    if (file) {
      setUploadedFileName(file.name)
      const reader = new FileReader()
      reader.onload = (event) => {
        setUploadedImage(event.target?.result as string)
      }
      reader.readAsDataURL(file)
    }
  }

  const removeUploadedImage = () => {
    setUploadedImage(null)
    setUploadedFileName('')
  }

  return (
    <div className="border-b border-border">
      <div
        onClick={onToggle}
        className="flex items-center justify-between p-4 cursor-pointer hover:bg-[rgba(255,255,255,0.02)]"
      >
        <h3 className="text-[13px] font-bold text-text-2 font-korean">
          예측정보 입력
        </h3>
        <span className="text-[10px] text-text-3">
          {expanded ? '▼' : '▶'}
        </span>
      </div>

      {expanded && (
        <div className="px-4 pb-4 flex flex-col gap-[6px]">
          {/* Input Mode Selection */}
          <div className="flex items-center gap-[10px] text-[11px]">
            <label className="flex items-center gap-[3px] cursor-pointer">
              <input
                type="radio"
                name="prdType"
                checked={inputMode === 'direct'}
                onChange={() => setInputMode('direct')}
                className="m-0 w-[11px] h-[11px]"
                className="accent-[var(--cyan)]"
              />
              직접 입력
            </label>
            <label className="flex items-center gap-[3px] cursor-pointer">
              <input
                type="radio"
                name="prdType"
                checked={inputMode === 'upload'}
                onChange={() => setInputMode('upload')}
                className="m-0 w-[11px] h-[11px]"
                className="accent-[var(--cyan)]"
              />
              이미지 업로드
            </label>
          </div>

          {/* Direct Input Mode */}
          {inputMode === 'direct' && (
            <>
              <input className="prd-i" placeholder="사고명 직접 입력" />
              <input className="prd-i" placeholder="또는 사고 리스트에서 선택" />
            </>
          )}

          {/* Image Upload Mode */}
          {inputMode === 'upload' && (
            <>
              <input className="prd-i" placeholder="여수 유조선 충돌" />
              <ComboBox
                className="prd-i"
                value=""
                onChange={() => {}}
                options={[
                  { value: '', label: '여수 유조선 충돌 (INC-0042)' },
                  { value: 'INC-0042', label: '여수 유조선 충돌 (INC-0042)' }
                ]}
                placeholder="사고 선택"
              />

              {/* Upload Success Message */}
              {uploadedImage && (
                <div className="flex items-center gap-[6px] text-[10px] font-semibold text-[#22c55e] rounded"
                  style={{
                    padding: '6px 8px',
                    background: 'rgba(34,197,94,0.1)',
                    border: '1px solid rgba(34,197,94,0.3)',
                    borderRadius: 'var(--rS)',
                  }}>
                  <span className="text-[12px]">✓</span>
                  내 이미지가 업로드됨
                </div>
              )}

              {/* File Upload Area */}
              {!uploadedImage ? (
                <label className="flex items-center justify-center text-[11px] text-text-3 cursor-pointer"
                  style={{
                    padding: '20px',
                    background: 'var(--bg0)',
                    border: '2px dashed var(--bd)',
                    borderRadius: 'var(--rS)',
                    transition: '0.15s',
                  }}
                  onMouseEnter={(e) => {
                    e.currentTarget.style.borderColor = 'var(--cyan)'
                    e.currentTarget.style.background = 'rgba(6,182,212,0.05)'
                  }}
                  onMouseLeave={(e) => {
                    e.currentTarget.style.borderColor = 'var(--bd)'
                    e.currentTarget.style.background = 'var(--bg0)'
                  }}>
                  📁 이미지 파일을 선택하세요
                  <input
                    type="file"
                    accept="image/*"
                    onChange={handleImageUpload}
                    className="hidden"
                  />
                </label>
              ) : (
                <div className="flex items-center justify-between font-mono text-[10px] bg-bg-0 border border-border"
                  style={{
                    padding: '8px 10px',
                    borderRadius: 'var(--rS)',
                  }}>
                  <span className="text-text-2">📄 {uploadedFileName || 'example_plot_0.gif'}</span>
                  <button
                    onClick={removeUploadedImage}
                    className="text-[10px] text-text-3 bg-transparent border-none cursor-pointer"
                    style={{ padding: '2px 6px', transition: '0.15s' }}
                    onMouseEnter={(e) => {
                      e.currentTarget.style.color = 'var(--red)'
                    }}
                    onMouseLeave={(e) => {
                      e.currentTarget.style.color = 'var(--t3)'
                    }}
                  >
                    ✕
                  </button>
                </div>
              )}

              {/* Dropdowns */}
              <div className="grid grid-cols-2 gap-1">
                <ComboBox
                  className="prd-i"
                  value=""
                  onChange={() => {}}
                  options={[
                    { value: '', label: '유출회사' },
                    { value: 'company1', label: '회사A' },
                    { value: 'company2', label: '회사B' }
                  ]}
                  placeholder="유출회사"
                />
                <ComboBox
                  className="prd-i"
                  value=""
                  onChange={() => {}}
                  options={[
                    { value: '', label: '예상시각' },
                    { value: '09:00', label: '09:00' },
                    { value: '12:00', label: '12:00' }
                  ]}
                  placeholder="예상시각"
                />
              </div>
            </>
          )}

          {/* Coordinates + Map Button */}
          <div className="flex flex-col gap-1">
            <div className="grid items-center gap-1" style={{ gridTemplateColumns: '1fr 1fr auto' }}>
              <input
                className="prd-i"
                type="number"
                step="0.0001"
                value={incidentCoord?.lat ?? ''}
                onChange={(e) => {
                  const value = e.target.value === '' ? 0 : parseFloat(e.target.value)
                  onCoordChange({ ...incidentCoord, lat: isNaN(value) ? 0 : value })
                }}
                placeholder="위도°"
              />
              <input
                className="prd-i"
                type="number"
                step="0.0001"
                value={incidentCoord?.lon ?? ''}
                onChange={(e) => {
                  const value = e.target.value === '' ? 0 : parseFloat(e.target.value)
                  onCoordChange({ ...incidentCoord, lon: isNaN(value) ? 0 : value })
                }}
                placeholder="경도°"
              />
              <button className="prd-map-btn" onClick={onMapSelectClick}>📍 지도</button>
            </div>
            {/* 도분초 표시 */}
            {incidentCoord && !isNaN(incidentCoord.lat) && !isNaN(incidentCoord.lon) && (
              <div className="text-[9px] text-text-3 font-mono border border-border bg-bg-0"
                style={{
                  padding: '4px 8px',
                  borderRadius: 'var(--rS)',
                }}>
                {decimalToDMS(incidentCoord.lat, true)} / {decimalToDMS(incidentCoord.lon, false)}
              </div>
            )}
          </div>

          {/* Oil Type + Oil Kind */}
          <div className="grid grid-cols-2 gap-1">
            <ComboBox
              className="prd-i"
              value={spillType}
              onChange={onSpillTypeChange}
              options={[
                { value: '연속', label: '연속' },
                { value: '비연속', label: '비연속' },
                { value: '순간 유출', label: '순간 유출' }
              ]}
            />
            <ComboBox
              className="prd-i"
              value={oilType}
              onChange={onOilTypeChange}
              options={[
                { value: '벙커C유', label: '벙커C유' },
                { value: '경유', label: '경유' },
                { value: '원유', label: '원유' },
                { value: '중유', label: '중유' },
                { value: '등유', label: '등유' },
                { value: '휘발유', label: '휘발유' }
              ]}
            />
          </div>

          {/* Volume + Unit + Duration */}
          <div className="grid items-center gap-1" style={{ gridTemplateColumns: '1fr 65px 1fr' }}>
            <input
              className="prd-i"
              placeholder="유출량"
              type="number"
              min="1"
              step="1"
              value={spillAmount}
              onChange={(e) => onSpillAmountChange(parseInt(e.target.value) || 0)}
            />
            <ComboBox
              className="prd-i"
              value="kL"
              onChange={() => {}}
              options={[
                { value: 'kL', label: 'kL' },
                { value: 'ton', label: 'Ton' },
                { value: 'barrel', label: '배럴' }
              ]}
            />
            <ComboBox
              className="prd-i"
              value={predictionTime}
              onChange={(v) => onPredictionTimeChange(parseInt(v))}
              options={[
                { value: '6', label: '6시간' },
                { value: '12', label: '12시간' },
                { value: '24', label: '24시간' },
                { value: '48', label: '48시간' },
                { value: '72', label: '72시간' }
              ]}
            />
          </div>

          {/* Image Analysis Note (Upload Mode Only) */}
          {inputMode === 'upload' && uploadedImage && (
            <div className="text-[9px] text-text-3 leading-[1.4]"
              style={{
                padding: '8px',
                background: 'rgba(59,130,246,0.08)',
                border: '1px solid rgba(59,130,246,0.2)',
                borderRadius: 'var(--rS)',
              }}>
              📊 이미지 내 확산경로를 분석하였습니다. 각 방제요소 가이드 참고하세요.
            </div>
          )}

          {/* Divider */}
          <div className="h-px bg-border my-0.5" />

          {/* Model Selection (다중 선택) */}
          <div className="flex flex-wrap gap-[3px]">
            {([
              { id: 'KOSPS' as PredictionModel, color: 'var(--cyan)' },
              { id: 'POSEIDON' as PredictionModel, color: 'var(--red)' },
              { id: 'OpenDrift' as PredictionModel, color: 'var(--blue)' },
            ] as const).map(m => (
              <div
                key={m.id}
                className={`prd-mc ${selectedModels.has(m.id) ? 'on' : ''} cursor-pointer`}
                onClick={() => {
                  const next = new Set(selectedModels)
                  if (next.has(m.id)) {
                    next.delete(m.id)
                  } else {
                    next.add(m.id)
                  }
                  onModelsChange(next)
                }}
              >
                <span className="prd-md" style={{ background: m.color }} />
                {m.id}
              </div>
            ))}
            <div
              className={`prd-mc ${selectedModels.size === ALL_MODELS.length ? 'on' : ''} cursor-pointer`}
              onClick={() => {
                if (selectedModels.size === ALL_MODELS.length) {
                  onModelsChange(new Set(['KOSPS']))
                } else {
                  onModelsChange(new Set(ALL_MODELS))
                }
              }}
            >
              <span className="prd-md" style={{ background: 'var(--purple)' }} />
              앙상블
            </div>
          </div>

          {/* Run Button */}
          <button
            className="prd-btn pri mt-0.5"
            style={{ padding: '7px', fontSize: '11px' }}
            onClick={onRunSimulation}
            disabled={isRunningSimulation}
          >
            {isRunningSimulation ? '⏳ 실행 중...' : '🔬 확산예측 실행'}
          </button>
        </div>
      )}
    </div>
  )
}

export default PredictionInputSection