import { METABASE_QUERIES } from '../../config/metabase-queries'

/**
 * Execute all comparativa cosechas queries in parallel
 * Returns data for the Comparativa de Cosechas page
 */
export default defineEventHandler(async (event) => {
  const body = await readBody(event)

  const { cosechas_ids = [] } = body

  try {
    // First, get all cards to find our comparativa queries
    const allCards = await getMetabaseCards('all')

    // Find our comparativa queries by name using centralized config
    const queryNames = METABASE_QUERIES.comparativa

    const cards: Record<string, any> = {}

    console.log('[Comparativa] Available cards:', allCards.map((c: any) => ({ id: c.id, name: c.name })))
    console.log('[Comparativa] Looking for queries:', queryNames)

    for (const [key, name] of Object.entries(queryNames)) {
      const card = allCards.find((c: any) => c.name === name)
      if (!card) {
        console.warn(`[Comparativa] Query not found: ${name}`)
      } else {
        console.log(`[Comparativa] Found card ${key}: ${name} (ID: ${card.id})`)
        cards[key] = card
      }
    }

    console.log('[Comparativa] Cards to execute:', Object.keys(cards))

    // Build parameters array for Metabase queries
    // Las queries SQL nativas usan template-tags de tipo 'text' para arrays
    // Convertir array JS a formato PostgreSQL: ['a', 'b'] -> '{a,b}'
    const cosechasArrayPg = Array.isArray(cosechas_ids) && cosechas_ids.length > 0
      ? `{${cosechas_ids.join(',')}}`
      : '{}'

    const parameters = [
      {
        type: 'text',
        target: ['variable', ['template-tag', 'cosechas_ids']],
        value: cosechasArrayPg
      }
    ]

    // Execute all queries in parallel with error handling
    const executeWithErrorHandling = async (name: string, cardId: number | undefined, defaultValue: any, params: any[] = parameters) => {
      if (!cardId) {
        console.warn(`[Comparativa] No card ID for ${name}`)
        return defaultValue
      }

      try {
        console.log(`[Comparativa] Executing query: ${name} (ID: ${cardId}) with params:`, JSON.stringify(params))
        const result = await executeCardQuery(cardId, params)
        console.log(`[Comparativa] Query ${name} result:`, {
          hasData: !!result.data,
          rowsLength: result.data?.rows?.length || 0,
          colsLength: result.data?.cols?.length || 0,
          firstRow: result.data?.rows?.[0] || null
        })
        return result
      } catch (error: any) {
        console.error(`[Comparativa] Error executing ${name}:`, error.message, error.stack)
        return defaultValue
      }
    }

    const [
      datosDiariosCompletos,
      totalesPorCosecha,
      datosAcumuladosPorDia,
      metadataCosechas
    ] = await Promise.all([
      executeWithErrorHandling('datosDiariosCompletos', cards.datos_diarios_completos?.id, { data: { rows: [], cols: [] } }),
      executeWithErrorHandling('totalesPorCosecha', cards.totales_por_cosecha?.id, { data: { rows: [], cols: [] } }),
      executeWithErrorHandling('datosAcumuladosPorDia', cards.datos_acumulados_por_dia?.id, { data: { rows: [], cols: [] } }),
      executeWithErrorHandling('metadataCosechas', cards.metadata_cosechas?.id, { data: { rows: [], cols: [] } }, [])  // Sin parámetros
    ])

    // Transform Metabase responses to objects for easier frontend consumption
    const transformMultipleRows = (result: any) => {
      console.log('[Comparativa] transformMultipleRows input:', {
        hasData: !!result.data,
        hasRows: !!result.data?.rows,
        hasCols: !!result.data?.cols,
        rowsLength: result.data?.rows?.length
      })

      if (!result.data?.rows || !result.data?.cols) {
        console.warn('[Comparativa] transformMultipleRows: Missing data, rows, or cols')
        return []
      }

      const cols = result.data.cols
      const transformed = result.data.rows.map((row: any[]) => {
        const obj: any = {}
        cols.forEach((col: any, index: number) => {
          obj[col.name] = row[index]
        })
        return obj
      })

      console.log('[Comparativa] transformMultipleRows output:', transformed.length, 'rows')
      return transformed
    }

    // Return all data in a structured format
    return {
      datosDiariosCompletos: transformMultipleRows(datosDiariosCompletos),
      totalesPorCosecha: transformMultipleRows(totalesPorCosecha),
      datosAcumuladosPorDia: transformMultipleRows(datosAcumuladosPorDia),
      metadataCosechas: transformMultipleRows(metadataCosechas)
    }
  } catch (error: any) {
    console.error('[API] Failed to execute comparativa queries:', error)
    throw createError({
      statusCode: error.statusCode || 500,
      statusMessage: error.statusMessage || 'Failed to execute comparativa queries'
    })
  }
})