import { RelationTypes, UITypes, buildFilterTree, isDateMonthFormat, isSystemColumn, isVirtualCol } from 'nocodb-sdk'
import type { ColumnType, FilterType, LinkToAnotherRecordType, TableType } from 'nocodb-sdk'
import dayjs from 'dayjs'
import { isColumnRequiredAndNull } from './columnUtils'
import type { Row } from '~/lib/types'

export const isValidValue = (val: unknown) => {
  if (ncIsNull(val) || ncIsUndefined(val)) {
    return false
  }

  if (ncIsString(val) && val === '') {
    return false
  }

  if (ncIsEmptyArray(val)) {
    return false
  }

  if (ncIsEmptyObject(val)) {
    return false
  }

  return true
}

export const extractPkFromRow = (row: Record<string, any>, columns: ColumnType[]) => {
  if (!row || !columns) return null

  const pkCols = columns.filter((c: Required<ColumnType>) => c.pk)
  // if multiple pk columns, join them with ___ and escape _ in id values with \_ to avoid conflicts
  if (pkCols.length > 1) {
    return pkCols.map((c: Required<ColumnType>) => row?.[c.title]?.toString?.().replaceAll('_', '\\_') ?? null).join('___')
  } else if (pkCols.length) {
    const id = row?.[pkCols[0].title] ?? null
    return id === null ? null : `${id}`
  }
}

export const rowPkData = (row: Record<string, any>, columns: ColumnType[]) => {
  const pkData: Record<string, string> = {}
  const pks = columns?.filter((c) => c.pk)
  if (row && pks && pks.length) {
    for (const pk of pks) {
      if (pk.title) pkData[pk.title] = row[pk.title]
    }
  }
  return pkData
}

export const extractPk = (columns: ColumnType[]) => {
  if (!columns && !Array.isArray(columns)) return null
  return columns
    .filter((c) => c.pk)
    .map((c) => c.title)
    .join('___')
}

export const findIndexByPk = (pk: Record<string, string>, data: Row[]) => {
  for (const [i, row] of Object.entries(data)) {
    if (Object.keys(pk).every((k) => pk[k] === row.row[k])) {
      return parseInt(i)
    }
  }
  return -1
}

// a function to populate insert object and verify if all required fields are present
export async function populateInsertObject({
  getMeta,
  row,
  meta,
  ltarState,
  throwError,
  undo = false,
}: {
  meta: TableType
  ltarState: Record<string, any>
  getMeta: (tableIdOrTitle: string, force?: boolean) => Promise<TableType | null>
  row: Record<string, any>
  throwError?: boolean
  undo?: boolean
}) {
  const missingRequiredColumns = new Set()
  const insertObj = await meta.columns?.reduce(async (_o: Promise<any>, col) => {
    const o = await _o

    // if column is BT relation then check if foreign key is not_null(required)
    if (
      ltarState &&
      col.uidt === UITypes.LinkToAnotherRecord &&
      (<LinkToAnotherRecordType>col.colOptions).type === RelationTypes.BELONGS_TO
    ) {
      if (ltarState[col.title!]) {
        const colOpt = <LinkToAnotherRecordType>col.colOptions
        const childCol = meta.columns!.find((c) => colOpt.fk_child_column_id === c.id)
        const relatedTableMeta = (await getMeta(colOpt.fk_related_model_id!)) as TableType
        if (relatedTableMeta && childCol) {
          o[childCol.title!] =
            ltarState[col.title!][relatedTableMeta!.columns!.find((c) => c.id === colOpt.fk_parent_column_id)!.title!]
          missingRequiredColumns.delete(childCol.title)
        }
      }
    }
    // check all the required columns are not null
    if (isColumnRequiredAndNull(col, row)) {
      missingRequiredColumns.add(col.title)
    }

    if ((!col.ai || undo) && row?.[col.title as string] !== null) {
      o[col.title as string] = row?.[col.title as string]
    }

    return o
  }, Promise.resolve({}))

  if (throwError && missingRequiredColumns.size) {
    throw new Error(`Missing required columns: ${[...missingRequiredColumns].join(', ')}`)
  }

  return { missingRequiredColumns, insertObj }
}

// a function to get default values of row
export const rowDefaultData = (columns: ColumnType[] = []) => {
  const defaultData: Record<string, string> = columns.reduce<Record<string, any>>((acc: Record<string, any>, col: ColumnType) => {
    //  avoid setting default value for system col, virtual col, rollup, formula, barcode, qrcode, links, ltar
    if (
      !isSystemColumn(col) &&
      !isVirtualCol(col) &&
      ![UITypes.Rollup, UITypes.Lookup, UITypes.Formula, UITypes.Barcode, UITypes.QrCode].includes(col.uidt) &&
      isValidValue(col?.cdf) &&
      !/^\w+\(\)|CURRENT_TIMESTAMP$/.test(col.cdf)
    ) {
      const defaultValue = col.cdf
      acc[col.title!] = typeof defaultValue === 'string' ? defaultValue.replace(/^'|'$/g, '') : defaultValue
    }
    return acc
  }, {} as Record<string, any>)

  return defaultData
}

export const isRowEmpty = (record: any, col: any) => {
  if (!record || !col) return true

  const val = record.row[col.title]
  if (val === null || val === undefined || val === '') return true

  return Array.isArray(val) && val.length === 0
}

export function validateRowFilters(_filters: FilterType[], data: any, columns: ColumnType[], client: any) {
  if (!_filters.length) {
    return true
  }

  const filters = buildFilterTree(_filters)

  let isValid = null
  for (const filter of filters) {
    let res
    if (filter.is_group && filter.children?.length) {
      res = validateRowFilters(filter.children, data, columns, client)
    } else {
      const column = columns.find((c) => c.id === filter.fk_column_id)
      if (!column) {
        continue
      }
      const field = column.title!
      let val = data[field]
      if (
        [UITypes.Date, UITypes.DateTime, UITypes.CreatedTime, UITypes.LastModifiedTime].includes(column.uidt!) &&
        !['empty', 'blank', 'notempty', 'notblank'].includes(filter.comparison_op!)
      ) {
        const dateFormat = client === 'mysql2' ? 'YYYY-MM-DD HH:mm:ss' : 'YYYY-MM-DD HH:mm:ssZ'

        let now = dayjs(new Date())
        const dateFormatFromMeta = column?.meta?.date_format
        const dataVal: any = val
        let filterVal: any = filter.value
        if (dateFormatFromMeta && isDateMonthFormat(dateFormatFromMeta)) {
          // reset to 1st
          now = dayjs(now).date(1)
          if (val) val = dayjs(val).date(1)
        }
        if (filterVal) res = dayjs(filterVal).isSame(dataVal, 'day')

        // handle sub operation
        switch (filter.comparison_sub_op) {
          case 'today':
            filterVal = now
            break
          case 'tomorrow':
            filterVal = now.add(1, 'day')
            break
          case 'yesterday':
            filterVal = now.add(-1, 'day')
            break
          case 'oneWeekAgo':
            filterVal = now.add(-1, 'week')
            break
          case 'oneWeekFromNow':
            filterVal = now.add(1, 'week')
            break
          case 'oneMonthAgo':
            filterVal = now.add(-1, 'month')
            break
          case 'oneMonthFromNow':
            filterVal = now.add(1, 'month')
            break
          case 'daysAgo':
            if (!filterVal) return
            filterVal = now.add(-filterVal, 'day')
            break
          case 'daysFromNow':
            if (!filterVal) return
            filterVal = now.add(filterVal, 'day')
            break
          case 'exactDate':
            if (!filterVal) return
            break
          // sub-ops for `isWithin` comparison
          case 'pastWeek':
            filterVal = now.add(-1, 'week')
            break
          case 'pastMonth':
            filterVal = now.add(-1, 'month')
            break
          case 'pastYear':
            filterVal = now.add(-1, 'year')
            break
          case 'nextWeek':
            filterVal = now.add(1, 'week')
            break
          case 'nextMonth':
            filterVal = now.add(1, 'month')
            break
          case 'nextYear':
            filterVal = now.add(1, 'year')
            break
          case 'pastNumberOfDays':
            if (!filterVal) return
            filterVal = now.add(-filterVal, 'day')
            break
          case 'nextNumberOfDays':
            if (!filterVal) return
            filterVal = now.add(filterVal, 'day')
            break
        }

        if (dataVal) {
          switch (filter.comparison_op) {
            case 'eq':
              res = dayjs(dataVal).isSame(filterVal, 'day')
              break
            case 'neq':
              res = !dayjs(dataVal).isSame(filterVal, 'day')
              break
            case 'gt':
              res = dayjs(dataVal).isAfter(filterVal, 'day')
              break
            case 'lt':
              res = dayjs(dataVal).isBefore(filterVal, 'day')
              break
            case 'lte':
            case 'le':
              res = dayjs(dataVal).isSameOrBefore(filterVal, 'day')
              break
            case 'gte':
            case 'ge':
              res = dayjs(dataVal).isSameOrAfter(filterVal, 'day')
              break
            case 'empty':
            case 'blank':
              res = dataVal === '' || dataVal === null || dataVal === undefined
              break
            case 'notempty':
            case 'notblank':
              res = !(dataVal === '' || dataVal === null || dataVal === undefined)
              break
            case 'isWithin': {
              let now = dayjs(new Date()).format(dateFormat).toString()
              now = column.uidt === UITypes.Date ? now.substring(0, 10) : now
              switch (filter.comparison_sub_op) {
                case 'pastWeek':
                case 'pastMonth':
                case 'pastYear':
                case 'pastNumberOfDays':
                  res = dayjs(dataVal).isBetween(filterVal, now, 'day')
                  break
                case 'nextWeek':
                case 'nextMonth':
                case 'nextYear':
                case 'nextNumberOfDays':
                  res = dayjs(dataVal).isBetween(now, filterVal, 'day')
                  break
              }
            }
          }
        }
      } else {
        switch (typeof filter.value) {
          case 'boolean':
            val = !!data[field]
            break
          case 'number':
            val = +data[field]
            break
        }

        if ([UITypes.User, UITypes.CreatedBy, UITypes.LastModifiedBy].includes(column.uidt!)) {
          const userIds: string[] = Array.isArray(data[field])
            ? data[field].map((user) => user.id)
            : data[field]?.id
            ? [data[field].id]
            : []

          const filterValues = filter.value.split(',').map((v) => v.trim())

          switch (filter.comparison_op) {
            case 'anyof':
              res = userIds.some((id) => filterValues.includes(id))
              break
            case 'nanyof':
              res = !userIds.some((id) => filterValues.includes(id))
              break
            case 'allof':
              res = filterValues.every((id) => userIds.includes(id))
              break
            case 'nallof':
              res = !filterValues.every((id) => userIds.includes(id))
              break
            case 'empty':
            case 'blank':
              res = userIds.length === 0
              break
            case 'notempty':
            case 'notblank':
              res = userIds.length > 0
              break
            default:
              res = false // Unsupported operation for User fields
          }
        } else {
          switch (filter.comparison_op) {
            case 'eq':
              res = val == filter.value
              break
            case 'neq':
              res = val != filter.value
              break
            case 'like':
              res = data[field]?.toString?.()?.toLowerCase()?.indexOf(filter.value?.toLowerCase()) > -1
              break
            case 'nlike':
              res = data[field]?.toString?.()?.toLowerCase()?.indexOf(filter.value?.toLowerCase()) === -1
              break
            case 'empty':
            case 'blank':
              res = data[field] === '' || data[field] === null || data[field] === undefined
              break
            case 'notempty':
            case 'notblank':
              res = !(data[field] === '' || data[field] === null || data[field] === undefined)
              break
            case 'checked':
              res = !!data[field]
              break
            case 'notchecked':
              res = !data[field]
              break
            case 'null':
              res = res = data[field] === null
              break
            case 'notnull':
              res = data[field] !== null
              break
            case 'allof':
              res = (filter.value?.split(',').map((item) => item.trim()) ?? []).every((item) =>
                (data[field]?.split(',') ?? []).includes(item),
              )
              break
            case 'anyof':
              res = (filter.value?.split(',').map((item) => item.trim()) ?? []).some((item) =>
                (data[field]?.split(',') ?? []).includes(item),
              )
              break
            case 'nallof':
              res = !(filter.value?.split(',').map((item) => item.trim()) ?? []).every((item) =>
                (data[field]?.split(',') ?? []).includes(item),
              )
              break
            case 'nanyof':
              res = !(filter.value?.split(',').map((item) => item.trim()) ?? []).some((item) =>
                (data[field]?.split(',') ?? []).includes(item),
              )
              break
            case 'lt':
              res = +data[field] < +filter.value
              break
            case 'lte':
            case 'le':
              res = +data[field] <= +filter.value
              break
            case 'gt':
              res = +data[field] > +filter.value
              break
            case 'gte':
            case 'ge':
              res = +data[field] >= +filter.value
              break
          }
        }
      }
    }

    switch (filter.logical_op) {
      case 'or':
        isValid = isValid || !!res
        break
      case 'not':
        isValid = isValid && !res
        break
      case 'and':
      default:
        isValid = (isValid ?? true) && res
        break
    }
  }
  return isValid
}