import { useState, useEffect, useCallback } from 'react'
import {
  Modal,
  Select,
  Slider,
  InputNumber,
  Button,
  message,
  Typography,
  Space,
  QRCode,
  Divider,
} from 'antd'
import { DownloadOutlined, SettingOutlined } from '@ant-design/icons'
import { useEditorStore } from '@/stores/editorStore'
import { exportAndSave, formatFileSize } from '@/utils/imageExporter'

const { Text } = Typography

interface ExportDialogProps {
  open: boolean
  onClose: () => void
}

export default function ExportDialog({ open, onClose }: ExportDialogProps) {
  const canvas = useEditorStore((s) => s.canvas)
  const exportConfig = useEditorStore((s) => s.exportConfig)
  const setExportConfig = useEditorStore((s) => s.setExportConfig)
  const [estimatedSize, setEstimatedSize] = useState<string>('')
  const [exporting, setExporting] = useState(false)

  // Update size estimate when config changes
  useEffect(() => {
    if (!canvas || !open) return
    // Estimate from canvas dimensions
    const w = canvas.width || 800
    const h = canvas.height || 600
    const exportW = Math.round(w * exportConfig.scaleFactor)
    const exportH = Math.round(h * exportConfig.scaleFactor)
    // Rough size estimation
    let bytes = exportW * exportH * 4 // RGBA
    if (exportConfig.format === 'jpeg' || exportConfig.format === 'webp') {
      bytes = Math.round(bytes * (exportConfig.quality / 100) * 0.3)
    } else {
      bytes = Math.round(bytes * 0.5)
    }
    setEstimatedSize(formatFileSize(bytes))
  }, [canvas, open, exportConfig])

  const handleExport = useCallback(async () => {
    if (!canvas) return

    setExporting(true)
    try {
      const success = await exportAndSave(canvas, exportConfig)
      if (success) {
        message.success('图片导出成功！')
        onClose()
      }
    } catch (err) {
      message.error('导出失败，请重试')
      console.error(err)
    } finally {
      setExporting(false)
    }
  }, [canvas, exportConfig, onClose])

  const canvasW = canvas?.width || 800
  const canvasH = canvas?.height || 600
  const exportW = Math.round(canvasW * exportConfig.scaleFactor)
  const exportH = Math.round(canvasH * exportConfig.scaleFactor)

  return (
    <Modal
      title={
        <Space>
          <DownloadOutlined />
          <span>导出图片</span>
        </Space>
      }
      open={open}
      onCancel={onClose}
      width={520}
      footer={null}
      destroyOnClose
      centered
    >
      <div style={{ padding: '8px 0', display: 'flex', flexDirection: 'column', gap: 20 }}>
        {/* Format */}
        <div>
          <Text style={{ color: 'var(--text-secondary)', fontSize: 12, display: 'block', marginBottom: 8 }}>
            图片格式
          </Text>
          <Select
            value={exportConfig.format}
            onChange={(v) => setExportConfig({ format: v })}
            style={{ width: '100%' }}
            options={[
              { value: 'png', label: 'PNG（无损，支持透明）' },
              { value: 'jpeg', label: 'JPEG（有损，体积小）' },
              { value: 'webp', label: 'WebP（现代格式，高效）' },
            ]}
          />
        </div>

        {/* Quality (for JPEG/WebP) */}
        {(exportConfig.format === 'jpeg' || exportConfig.format === 'webp') && (
          <div>
            <div style={{ display: 'flex', justifyContent: 'space-between', marginBottom: 8 }}>
              <Text style={{ color: 'var(--text-secondary)', fontSize: 12 }}>图片质量</Text>
              <Text style={{ color: 'var(--accent)', fontSize: 12, fontWeight: 600 }}>
                {exportConfig.quality}%
              </Text>
            </div>
            <Slider
              value={exportConfig.quality}
              onChange={(v) => setExportConfig({ quality: v })}
              min={10}
              max={100}
              marks={{ 10: '低', 50: '中', 80: '高', 100: '最佳' }}
            />
          </div>
        )}

        {/* Scale / Size */}
        <div>
          <Text style={{ color: 'var(--text-secondary)', fontSize: 12, display: 'block', marginBottom: 8 }}>
            导出尺寸
          </Text>
          <div style={{ display: 'flex', gap: 12, alignItems: 'center', marginBottom: 8 }}>
            <InputNumber
              value={exportW}
              disabled
              size="small"
              addonBefore="宽"
              style={{ flex: 1 }}
            />
            <span style={{ color: 'var(--text-secondary)' }}>×</span>
            <InputNumber
              value={exportH}
              disabled
              size="small"
              addonBefore="高"
              style={{ flex: 1 }}
            />
          </div>
          <Slider
            value={exportConfig.scaleFactor}
            onChange={(v) => setExportConfig({ scaleFactor: v })}
            min={0.25}
            max={4}
            step={0.25}
            marks={{
              0.25: '0.25×',
              0.5: '0.5×',
              1: '1×',
              2: '2×',
              4: '4×',
            }}
            tooltip={{ formatter: (v) => `${v}×` }}
          />
        </div>

        {/* Info */}
        <div style={{
          background: 'var(--bg-canvas)',
          borderRadius: 6,
          padding: '12px 16px',
          display: 'flex',
          justifyContent: 'space-between',
          alignItems: 'center',
        }}>
          <Space direction="vertical" size={2}>
            <Text style={{ color: 'var(--text-secondary)', fontSize: 12 }}>
              导出分辨率
            </Text>
            <Text style={{ color: 'var(--text-primary)', fontSize: 14, fontWeight: 500 }}>
              {exportW} × {exportH}
            </Text>
          </Space>
          <Space direction="vertical" size={2} style={{ textAlign: 'right' }}>
            <Text style={{ color: 'var(--text-secondary)', fontSize: 12 }}>
              预估文件大小
            </Text>
            <Text style={{ color: 'var(--accent)', fontSize: 14, fontWeight: 500 }}>
              {estimatedSize}
            </Text>
          </Space>
        </div>

        {/* Actions */}
        <div style={{ display: 'flex', justifyContent: 'flex-end', gap: 12, marginTop: 8 }}>
          <Button onClick={onClose}>取消</Button>
          <Button
            type="primary"
            icon={<DownloadOutlined />}
            onClick={handleExport}
            loading={exporting}
            size="large"
          >
            导出图片
          </Button>
        </div>
      </div>
    </Modal>
  )
}