import { useState } from 'react'
import { exportsApi } from '../services/api'
import type {
  DatasetCreateResponse,
  ExportCreateResponse,
  ExportRead,
  MapResultExportRequest,
  VectorSelectionBBox,
} from '../types'
import { formatError } from '../lib/formatError'

interface ExportWorkflowOptions {
  selectedProjectId: string | null
  selectedDataset: DatasetCreateResponse | null
  selectedDetectionRunId: string
  selectedSegmentationRunId: string
  isVectorDatasetType: (datasetType: string) => boolean
}

export function useExportWorkflow({
  selectedProjectId,
  selectedDataset,
  selectedDetectionRunId,
  selectedSegmentationRunId,
  isVectorDatasetType,
}: ExportWorkflowOptions) {
  const [exports, setExports] = useState<ExportRead[]>([])
  const [latestExport, setLatestExport] = useState<ExportCreateResponse | null>(null)
  const [exportError, setExportError] = useState<string | null>(null)
  const [loadingExports, setLoadingExports] = useState(false)
  const [exporting, setExporting] = useState(false)
  const [selectionExporting, setSelectionExporting] = useState(false)
  const [selectionExportError, setSelectionExportError] = useState<string | null>(null)
  const [latestSelectionExport, setLatestSelectionExport] = useState<ExportCreateResponse | null>(null)
  const [exportPreview, setExportPreview] = useState<Record<string, unknown> | null>(null)

  const loadExports = async (projectId = selectedProjectId) => {
    if (!projectId) {
      setExports([])
      return
    }
    setLoadingExports(true)
    setExportError(null)
    try {
      const response = await exportsApi.listProjectExports(projectId)
      setExports(response.items)
    } catch (error) {
      setExportError(formatError(error, 'Failed to load exports'))
    } finally {
      setLoadingExports(false)
    }
  }

  const exportSelectedDatasetGeoJson = async () => {
    if (!selectedDataset || !isVectorDatasetType(selectedDataset.dataset_type)) {
      setExportError('Select a vector dataset before exporting GeoJSON.')
      return
    }
    setExporting(true)
    setExportError(null)
    try {
      const response = await exportsApi.exportGeojson({
        dataset_id: selectedDataset.id,
        export_kind: 'dataset',
        name: selectedDataset.name.replace(/\.(geo)?json$/i, ''),
      })
      setLatestExport(response)
      await loadExports(selectedDataset.project_id)
    } catch (error) {
      setExportError(formatError(error, 'Failed to export selected dataset'))
    } finally {
      setExporting(false)
    }
  }

  const exportSelectedDetectionRunGeoJson = async () => {
    if (!selectedDetectionRunId) {
      setExportError('Select a detection run before exporting GeoJSON.')
      return
    }
    setExporting(true)
    setExportError(null)
    try {
      const response = await exportsApi.exportGeojson({
        analysis_run_id: selectedDetectionRunId,
        export_kind: 'detection_run',
      })
      setLatestExport(response)
      await loadExports(selectedProjectId)
    } catch (error) {
      setExportError(formatError(error, 'Failed to export detection run'))
    } finally {
      setExporting(false)
    }
  }

  const exportSelectedSegmentationRunGeoJson = async () => {
    if (!selectedSegmentationRunId) {
      setExportError('Select a segmentation run before exporting GeoJSON.')
      return
    }
    setExporting(true)
    setExportError(null)
    try {
      const response = await exportsApi.exportGeojson({
        analysis_run_id: selectedSegmentationRunId,
        export_kind: 'segmentation_run',
      })
      setLatestExport(response)
      await loadExports(selectedProjectId)
    } catch (error) {
      setExportError(formatError(error, 'Failed to export segmentation run'))
    } finally {
      setExporting(false)
    }
  }

  const exportMapSelectionGeoJson = async (bbox: VectorSelectionBBox, areaId?: string) => {
    if (!selectedDataset || !isVectorDatasetType(selectedDataset.dataset_type)) {
      setSelectionExportError('Select a vector dataset before saving an area export.')
      return null
    }
    setSelectionExporting(true)
    setSelectionExportError(null)
    try {
      const response = await exportsApi.exportGeojson({
        dataset_id: selectedDataset.id,
        area_id: areaId,
        export_kind: 'vector_selection',
        bbox: { ...bbox, crs: 'EPSG:4326' },
        limit: 250,
        name: `${selectedDataset.name.replace(/\.(geo)?json$/i, '')}-selection`,
      })
      setLatestExport(response)
      setLatestSelectionExport(response)
      await loadExports(selectedDataset.project_id)
      return response
    } catch (error) {
      setSelectionExportError(formatError(error, 'Failed to save area export'))
      return null
    } finally {
      setSelectionExporting(false)
    }
  }

  const exportProjectMetadata = async () => {
    if (!selectedProjectId) {
      setExportError('Select a project before exporting metadata.')
      return
    }
    setExporting(true)
    setExportError(null)
    try {
      const response = await exportsApi.exportProjectMetadata(selectedProjectId)
      setLatestExport(response)
      await loadExports(selectedProjectId)
    } catch (error) {
      setExportError(formatError(error, 'Failed to export project metadata'))
    } finally {
      setExporting(false)
    }
  }

  const exportProjectReport = async () => {
    if (!selectedProjectId) {
      setExportError('Select a project before exporting a report.')
      return
    }
    setExporting(true)
    setExportError(null)
    try {
      const response = await exportsApi.exportProjectReport(selectedProjectId)
      setLatestExport(response)
      await loadExports(selectedProjectId)
    } catch (error) {
      setExportError(formatError(error, 'Failed to export project report'))
    } finally {
      setExporting(false)
    }
  }

  const persistMapResult = async (payload: MapResultExportRequest) => {
    setSelectionExporting(true)
    setSelectionExportError(null)
    try {
      const response = await exportsApi.exportMapResult(payload)
      setLatestExport(response)
      setLatestSelectionExport(response)
      await loadExports(payload.project_id)
      return response
    } catch (error) {
      setSelectionExportError(formatError(error, 'Het kaartresultaat kon niet worden bewaard.'))
      return null
    } finally {
      setSelectionExporting(false)
    }
  }

  const previewExportContent = async (exportId: string) => {
    setExportError(null)
    try {
      const response = await exportsApi.getContent(exportId)
      setExportPreview(response.content)
    } catch (error) {
      setExportError(formatError(error, 'Failed to load export content'))
    }
  }

  const downloadExportArtifact = (exportId: string) => {
    window.open(exportsApi.downloadUrl(exportId), '_blank', 'noopener,noreferrer')
  }

  const resetExportsForProject = () => {
    setExports([])
    setLatestExport(null)
    setLatestSelectionExport(null)
    setSelectionExportError(null)
    setExportPreview(null)
  }

  return {
    exports,
    latestExport,
    exportError,
    loadingExports,
    exporting,
    selectionExporting,
    selectionExportError,
    latestSelectionExport,
    exportPreview,
    loadExports,
    exportSelectedDatasetGeoJson,
    exportSelectedDetectionRunGeoJson,
    exportSelectedSegmentationRunGeoJson,
    exportMapSelectionGeoJson,
    persistMapResult,
    exportProjectMetadata,
    exportProjectReport,
    previewExportContent,
    downloadExportArtifact,
    resetExportsForProject,
  }
}