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

/**
 * Execute all informe queries in parallel
 * Returns data for the Informe de Ingresos page
 */
export default defineEventHandler(async (event) => {
  const body = await readBody(event)

  const {
    fecha_desde = null,
    fecha_hasta = null,
    incluir_anulados = false,
    cliente_ids = [],
    tipos = [],
    estados = [],
    ubicaciones = [],
    calidades = [],
    granularidad = 'dia'
  } = body

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

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

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

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

    // Build parameters array for Metabase queries
    // Las queries SQL nativas usan template-tags de tipo 'text' para fechas, no 'date/single'
    const buildParameters = (includeGranularidad: boolean = false) => {
      const params = [
        {
          type: 'text',
          target: ['variable', ['template-tag', 'fecha_desde']],
          value: fecha_desde || ''
        },
        {
          type: 'text',
          target: ['variable', ['template-tag', 'fecha_hasta']],
          value: fecha_hasta || ''
        },
        {
          type: 'boolean',
          target: ['variable', ['template-tag', 'incluir_anulados']],
          value: incluir_anulados
        },
        {
          type: 'number',
          target: ['variable', ['template-tag', 'cliente_ids']],
          value: cliente_ids
        },
        {
          type: 'text',
          target: ['variable', ['template-tag', 'tipos']],
          value: tipos
        },
        {
          type: 'text',
          target: ['variable', ['template-tag', 'estados']],
          value: estados
        },
        {
          type: 'text',
          target: ['variable', ['template-tag', 'ubicaciones']],
          value: ubicaciones
        },
        {
          type: 'text',
          target: ['variable', ['template-tag', 'calidades']],
          value: calidades
        }
      ]

      if (includeGranularidad) {
        params.push({
          type: 'text',
          target: ['variable', ['template-tag', 'granularidad']],
          value: granularidad
        })
      }

      return params
    }

    const standardParams = buildParameters(false)
    const serieTemporalParams = buildParameters(true)

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

      try {
        console.log(`[Informe] Executing query: ${name} (ID: ${cardId})`)
        const result = await executeCardQuery(cardId, parameters)
        console.log(`[Informe] Query ${name} returned ${result.data?.rows?.length || 0} rows`)
        return result
      } catch (error: any) {
        console.error(`[Informe] Error executing ${name}:`, error.message)
        return defaultValue
      }
    }

    const [
      totalesIngresoCompra,
      totalesMonetarios,
      totalesVerde,
      listaIngresos,
      listaClientes,
      serieTemporal,
      opcionesFiltros,
      contadores
    ] = await Promise.all([
      executeWithErrorHandling('totales_ingreso_compra', cards.totales_ingreso_compra?.id, standardParams, { data: { rows: [[]], cols: [] } }),
      executeWithErrorHandling('totales_monetarios', cards.totales_monetarios?.id, standardParams, { data: { rows: [[]], cols: [] } }),
      executeWithErrorHandling('totales_verde', cards.totales_verde?.id, standardParams, { data: { rows: [[]], cols: [] } }),
      executeWithErrorHandling('lista_ingresos', cards.lista_ingresos?.id, standardParams, { data: { rows: [], cols: [] } }),
      executeWithErrorHandling('lista_clientes', cards.lista_clientes?.id, standardParams, { data: { rows: [], cols: [] } }),
      executeWithErrorHandling('serie_temporal', cards.serie_temporal?.id, serieTemporalParams, { data: { rows: [], cols: [] } }),
      executeWithErrorHandling('opciones_filtros', cards.opciones_filtros?.id, [], { data: { rows: [[]], cols: [] } }),
      executeWithErrorHandling('contadores', cards.contadores?.id, standardParams, { data: { rows: [[]], cols: [] } })
    ])

    // Transform Metabase responses to objects for easier frontend consumption
    const transformSingleRow = (result: any) => {
      if (!result.data?.rows?.[0] || !result.data?.cols) return {}

      const row = result.data.rows[0]
      const cols = result.data.cols
      const obj: any = {}

      cols.forEach((col: any, index: number) => {
        obj[col.name] = row[index]
      })

      return obj
    }

    const transformMultipleRows = (result: any) => {
      if (!result.data?.rows || !result.data?.cols) return []

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

    // Return all data in a structured format
    return {
      totalesIngresoCompra: transformSingleRow(totalesIngresoCompra),
      totalesMonetarios: transformSingleRow(totalesMonetarios),
      totalesVerde: transformSingleRow(totalesVerde),
      listaIngresos: transformMultipleRows(listaIngresos),
      listaClientes: transformMultipleRows(listaClientes),
      serieTemporal: transformMultipleRows(serieTemporal),
      opcionesFiltros: transformSingleRow(opcionesFiltros),
      contadores: transformSingleRow(contadores)
    }
  } catch (error: any) {
    console.error('[API] Failed to execute informe queries:', error)
    throw createError({
      statusCode: error.statusCode || 500,
      statusMessage: error.statusMessage || 'Failed to execute informe queries'
    })
  }
})