import { UITypes } from 'nocodb-sdk'
import type { ColumnType, LinkToAnotherRecordType, PaginatedType, RelationTypes, TableType, ViewType } from 'nocodb-sdk'
import type { ComputedRef, Ref } from 'vue'
import {
  NOCO,
  computed,
  extractPkFromRow,
  extractSdkResponseErrorMsg,
  findIndexByPk,
  message,
  populateInsertObject,
  rowPkData,
  storeToRefs,
  until,
  useI18n,
  useMetas,
  useNuxtApp,
  useProject,
} from '#imports'
import type { CellRange, Row, UndoRedoAction } from '#imports'

export function useData(args: {
  meta: Ref<TableType | undefined> | ComputedRef<TableType | undefined>
  viewMeta: Ref<ViewType | undefined> | ComputedRef<(ViewType & { id: string }) | undefined>
  formattedData: Ref<Row[]>
  paginationData: Ref<PaginatedType>
  callbacks?: {
    changePage?: (page: number) => Promise<void>
    loadData?: () => Promise<void>
    globalCallback?: (...args: any[]) => void
    syncCount?: () => Promise<void>
    syncPagination?: () => Promise<void>
  }
}) {
  const { meta, viewMeta, formattedData, paginationData, callbacks } = args

  if (!meta) {
    throw new Error('Table meta is not available')
  }

  const { t } = useI18n()

  const { getMeta, metas } = useMetas()

  const { addUndo, clone, defineViewScope } = useUndoRedo()

  const { project } = storeToRefs(useProject())

  const { $api } = useNuxtApp()

  const selectedAllRecords = computed({
    get() {
      return !!formattedData.value.length && formattedData.value.every((row: Row) => row.rowMeta.selected)
    },
    set(selected: boolean) {
      formattedData.value.forEach((row: Row) => (row.rowMeta.selected = selected))
    },
  })

  function addEmptyRow(addAfter = formattedData.value.length) {
    formattedData.value.splice(addAfter, 0, {
      row: {},
      oldRow: {},
      rowMeta: { new: true },
    })

    return formattedData.value[addAfter]
  }

  async function insertRow(
    currentRow: Row,
    ltarState: Record<string, any> = {},
    { metaValue = meta.value, viewMetaValue = viewMeta.value }: { metaValue?: TableType; viewMetaValue?: ViewType } = {},
    undo = false,
  ) {
    const row = currentRow.row
    if (currentRow.rowMeta) currentRow.rowMeta.saving = true
    try {
      const { missingRequiredColumns, insertObj } = await populateInsertObject({
        meta: metaValue!,
        ltarState,
        getMeta,
        row,
        undo,
      })

      if (missingRequiredColumns.size) return

      const insertedData = await $api.dbViewRow.create(
        NOCO,
        project?.value.id as string,
        metaValue?.id as string,
        viewMetaValue?.id as string,
        insertObj,
      )

      if (!undo) {
        Object.assign(currentRow, {
          row: { ...insertedData, ...row },
          rowMeta: { ...(currentRow.rowMeta || {}), new: undefined },
          oldRow: { ...insertedData },
        })

        const id = extractPkFromRow(insertedData, metaValue?.columns as ColumnType[])
        const pkData = rowPkData(insertedData, metaValue?.columns as ColumnType[])
        const rowIndex = findIndexByPk(pkData, formattedData.value)

        addUndo({
          redo: {
            fn: async function redo(
              this: UndoRedoAction,
              row: Row,
              ltarState: Record<string, any>,
              pg: { page: number; pageSize: number },
            ) {
              row.row = { ...pkData, ...row.row }
              const insertedData = await insertRow(row, ltarState, undefined, true)
              if (rowIndex !== -1 && pg.pageSize === paginationData.value.pageSize) {
                if (pg.page === paginationData.value.page) {
                  formattedData.value.splice(rowIndex, 0, {
                    row: { ...row, ...insertedData },
                    rowMeta: row.rowMeta,
                    oldRow: row.oldRow,
                  })
                } else {
                  await callbacks?.changePage?.(pg.page)
                }
              } else {
                await callbacks?.loadData?.()
              }
            },
            args: [
              clone(currentRow),
              clone(ltarState),
              { page: paginationData.value.page, pageSize: paginationData.value.pageSize },
            ],
          },
          undo: {
            fn: async function undo(this: UndoRedoAction, id: string) {
              await deleteRowById(id)
              if (rowIndex !== -1) formattedData.value.splice(rowIndex, 1)
              paginationData.value.totalRows = paginationData.value.totalRows! - 1
            },
            args: [id],
          },
          scope: defineViewScope({ view: viewMeta.value }),
        })
      }

      await callbacks?.syncCount?.()
      return insertedData
    } catch (error: any) {
      message.error(await extractSdkResponseErrorMsg(error))
    } finally {
      if (currentRow.rowMeta) currentRow.rowMeta.saving = false
      await callbacks?.globalCallback?.()
    }
  }

  // inside this method use metaValue and viewMetaValue to refer meta
  // since sometimes we need to pass old metas
  async function updateRowProperty(
    toUpdate: Row,
    property: string,
    { metaValue = meta.value, viewMetaValue = viewMeta.value }: { metaValue?: TableType; viewMetaValue?: ViewType } = {},
    undo = false,
  ) {
    if (toUpdate.rowMeta) toUpdate.rowMeta.saving = true

    try {
      const id = extractPkFromRow(toUpdate.row, metaValue?.columns as ColumnType[])

      const updatedRowData: Record<string, any> = await $api.dbViewRow.update(
        NOCO,
        project?.value.id as string,
        metaValue?.id as string,
        viewMetaValue?.id as string,
        id,
        {
          // if value is undefined treat it as null
          [property]: toUpdate.row[property] ?? null,
        },
        // todo:
        // {
        //   query: { ignoreWebhook: !saved }
        // }
      )

      if (!undo) {
        addUndo({
          redo: {
            fn: async function redo(toUpdate: Row, property: string, pg: { page: number; pageSize: number }) {
              const updatedData = await updateRowProperty(toUpdate, property, undefined, true)
              if (pg.page === paginationData.value.page && pg.pageSize === paginationData.value.pageSize) {
                const rowIndex = findIndexByPk(rowPkData(toUpdate.row, meta?.value?.columns as ColumnType[]), formattedData.value)
                if (rowIndex !== -1) {
                  const row = formattedData.value[rowIndex]
                  Object.assign(row.row, updatedData)
                  Object.assign(row.oldRow, updatedData)
                } else {
                  await callbacks?.loadData?.()
                }
              } else {
                await callbacks?.changePage?.(pg.page)
              }
            },
            args: [clone(toUpdate), property, { page: paginationData.value.page, pageSize: paginationData.value.pageSize }],
          },
          undo: {
            fn: async function undo(toUpdate: Row, property: string, pg: { page: number; pageSize: number }) {
              console.log('undo', toUpdate, property, pg)
              const updatedData = await updateRowProperty(
                { row: toUpdate.oldRow, oldRow: toUpdate.row, rowMeta: toUpdate.rowMeta },
                property,
                undefined,
                true,
              )
              if (pg.page === paginationData.value.page && pg.pageSize === paginationData.value.pageSize) {
                const rowIndex = findIndexByPk(rowPkData(toUpdate.row, meta?.value?.columns as ColumnType[]), formattedData.value)
                if (rowIndex !== -1) {
                  console.log('manual')
                  const row = formattedData.value[rowIndex]
                  Object.assign(row.row, updatedData)
                  Object.assign(row.oldRow, updatedData)
                } else {
                  console.log('fallback')
                  await callbacks?.loadData?.()
                }
              } else {
                await callbacks?.changePage?.(pg.page)
              }
            },
            args: [clone(toUpdate), property, { page: paginationData.value.page, pageSize: paginationData.value.pageSize }],
          },
          scope: defineViewScope({ view: viewMeta.value }),
        })

        /** update row data(to sync formula and other related columns)
         * update only formula, rollup and auto updated datetime columns data to avoid overwriting any changes made by user
         */
        Object.assign(
          toUpdate.row,
          metaValue!.columns!.reduce<Record<string, any>>((acc: Record<string, any>, col: ColumnType) => {
            if (
              col.uidt === UITypes.Formula ||
              col.uidt === UITypes.QrCode ||
              col.uidt === UITypes.Barcode ||
              col.uidt === UITypes.Rollup ||
              col.au ||
              col.cdf?.includes(' on update ')
            )
              acc[col.title!] = updatedRowData[col.title!]
            return acc
          }, {} as Record<string, any>),
        )
        Object.assign(toUpdate.oldRow, updatedRowData)
      }

      await callbacks?.globalCallback?.()

      return updatedRowData
    } catch (e: any) {
      message.error(`${t('msg.error.rowUpdateFailed')} ${await extractSdkResponseErrorMsg(e)}`)
    } finally {
      if (toUpdate.rowMeta) toUpdate.rowMeta.saving = false
    }
  }

  async function updateOrSaveRow(
    row: Row,
    property?: string,
    ltarState?: Record<string, any>,
    args: { metaValue?: TableType; viewMetaValue?: ViewType } = {},
  ) {
    // update changed status
    if (row.rowMeta) row.rowMeta.changed = false

    // if new row and save is in progress then wait until the save is complete
    await until(() => !(row.rowMeta?.new && row.rowMeta?.saving)).toMatch((v) => v)

    if (row.rowMeta.new) {
      return await insertRow(row, ltarState, args)
    } else {
      // if the field name is missing skip update
      if (property) {
        await updateRowProperty(row, property, args)
      }
    }
  }

  async function bulkUpdateRows(
    rows: Row[],
    props: string[],
    { metaValue = meta.value, viewMetaValue = viewMeta.value }: { metaValue?: TableType; viewMetaValue?: ViewType } = {},
    undo = false,
  ) {
    const promises = []

    for (const row of rows) {
      // update changed status
      if (row.rowMeta) row.rowMeta.changed = false

      // if new row and save is in progress then wait until the save is complete
      promises.push(until(() => !(row.rowMeta?.new && row.rowMeta?.saving)).toMatch((v) => v))
    }

    await Promise.all(promises)

    const updateArray = []

    for (const row of rows) {
      if (row.rowMeta) row.rowMeta.saving = true

      const pk = rowPkData(row.row, metaValue?.columns as ColumnType[])

      const updateData = props.reduce((acc: Record<string, any>, prop) => {
        acc[prop] = row.row[prop]
        return acc
      }, {} as Record<string, any>)

      updateArray.push({ ...updateData, ...pk })
    }

    await $api.dbTableRow.bulkUpdate(NOCO, metaValue?.project_id as string, metaValue?.id as string, updateArray)

    if (!undo) {
      addUndo({
        redo: {
          fn: async function redo(redoRows: Row[], props: string[], pg: { page: number; pageSize: number }) {
            await bulkUpdateRows(redoRows, props, { metaValue, viewMetaValue }, true)
            if (pg.page === paginationData.value.page && pg.pageSize === paginationData.value.pageSize) {
              for (const toUpdate of redoRows) {
                const rowIndex = findIndexByPk(rowPkData(toUpdate.row, meta?.value?.columns as ColumnType[]), formattedData.value)
                if (rowIndex !== -1) {
                  const row = formattedData.value[rowIndex]
                  Object.assign(row.row, toUpdate.row)
                  Object.assign(row.oldRow, toUpdate.row)
                } else {
                  await callbacks?.loadData?.()
                  break
                }
              }
            } else {
              await callbacks?.changePage?.(pg.page)
            }
          },
          args: [clone(rows), clone(props), { page: paginationData.value.page, pageSize: paginationData.value.pageSize }],
        },
        undo: {
          fn: async function undo(undoRows: Row[], props: string[], pg: { page: number; pageSize: number }) {
            await bulkUpdateRows(undoRows, props, { metaValue, viewMetaValue }, true)
            if (pg.page === paginationData.value.page && pg.pageSize === paginationData.value.pageSize) {
              for (const toUpdate of undoRows) {
                const rowIndex = findIndexByPk(rowPkData(toUpdate.row, meta?.value?.columns as ColumnType[]), formattedData.value)
                if (rowIndex !== -1) {
                  const row = formattedData.value[rowIndex]
                  Object.assign(row.row, toUpdate.row)
                  Object.assign(row.oldRow, toUpdate.row)
                } else {
                  await callbacks?.loadData?.()
                  break
                }
              }
            } else {
              await callbacks?.changePage?.(pg.page)
            }
          },
          args: [
            clone(
              rows.map((row) => {
                return { row: row.oldRow, oldRow: row.row, rowMeta: row.rowMeta }
              }),
            ),
            props,
            { page: paginationData.value.page, pageSize: paginationData.value.pageSize },
          ],
        },
        scope: defineViewScope({ view: viewMetaValue }),
      })
    }

    for (const row of rows) {
      if (!undo) {
        /** update row data(to sync formula and other related columns)
         * update only formula, rollup and auto updated datetime columns data to avoid overwriting any changes made by user
         */
        Object.assign(
          row.row,
          metaValue!.columns!.reduce<Record<string, any>>((acc: Record<string, any>, col: ColumnType) => {
            if (
              col.uidt === UITypes.Formula ||
              col.uidt === UITypes.QrCode ||
              col.uidt === UITypes.Barcode ||
              col.uidt === UITypes.Rollup ||
              col.au ||
              col.cdf?.includes(' on update ')
            )
              acc[col.title!] = row.row[col.title!]
            return acc
          }, {} as Record<string, any>),
        )
        Object.assign(row.oldRow, row.row)
      }

      if (row.rowMeta) row.rowMeta.saving = false
    }

    await callbacks?.globalCallback?.()
  }

  async function bulkUpdateView(
    data: Record<string, any>[],
    { metaValue = meta.value, viewMetaValue = viewMeta.value }: { metaValue?: TableType; viewMetaValue?: ViewType } = {},
  ) {
    if (!viewMetaValue) return

    await $api.dbTableRow.bulkUpdateAll(NOCO, metaValue?.project_id as string, metaValue?.id as string, data, {
      viewId: viewMetaValue.id,
    })

    await callbacks?.loadData?.()
    await callbacks?.globalCallback?.()
  }

  const linkRecord = async (
    rowId: string,
    relatedRowId: string,
    column: ColumnType,
    type: RelationTypes,
    { metaValue = meta.value }: { metaValue?: TableType } = {},
  ) => {
    try {
      await $api.dbTableRow.nestedAdd(
        NOCO,
        project.value.title as string,
        metaValue?.title as string,
        encodeURIComponent(rowId),
        type as 'mm' | 'hm',
        column.title as string,
        encodeURIComponent(relatedRowId),
      )
    } catch (e: any) {
      message.error(await extractSdkResponseErrorMsg(e))
    }
  }

  // Recover LTAR relations for a row using the row data
  const recoverLTARRefs = async (row: Record<string, any>, { metaValue = meta.value }: { metaValue?: TableType } = {}) => {
    const id = extractPkFromRow(row, metaValue?.columns as ColumnType[])
    for (const column of metaValue?.columns ?? []) {
      if (column.uidt !== UITypes.LinkToAnotherRecord) continue

      const colOptions = column.colOptions as LinkToAnotherRecordType

      const relatedTableMeta = metas.value?.[colOptions?.fk_related_model_id as string]

      if (isHm(column) || isMm(column)) {
        const relatedRows = (row[column.title!] ?? []) as Record<string, any>[]

        for (const relatedRow of relatedRows) {
          await linkRecord(
            id,
            extractPkFromRow(relatedRow, relatedTableMeta.columns as ColumnType[]),
            column,
            colOptions.type as RelationTypes,
            { metaValue },
          )
        }
      } else if (isBt(column) && row[column.title!]) {
        await linkRecord(
          id,
          extractPkFromRow(row[column.title!] as Record<string, any>, relatedTableMeta.columns as ColumnType[]),
          column,
          colOptions.type as RelationTypes,
          { metaValue },
        )
      }
    }
  }

  async function deleteRowById(
    id: string,
    { metaValue = meta.value, viewMetaValue = viewMeta.value }: { metaValue?: TableType; viewMetaValue?: ViewType } = {},
  ) {
    if (!id) {
      throw new Error("Delete not allowed for table which doesn't have primary Key")
    }

    const res: any = await $api.dbViewRow.delete(
      'noco',
      project.value.id as string,
      metaValue?.id as string,
      viewMetaValue?.id as string,
      encodeURIComponent(id),
    )

    if (res.message) {
      message.info(
        `Row delete failed: ${`Unable to delete row with ID ${id} because of the following:
              \n${res.message.join('\n')}.\n
              Clear the data first & try again`})}`,
      )
      return false
    }
    return true
  }

  async function deleteRow(rowIndex: number, undo?: boolean) {
    try {
      const row = formattedData.value[rowIndex]
      if (!row.rowMeta.new) {
        const id = meta?.value?.columns
          ?.filter((c) => c.pk)
          .map((c) => row.row[c.title!])
          .join('___')

        const deleted = await deleteRowById(id as string)
        if (!deleted) {
          return
        }

        if (!undo) {
          addUndo({
            redo: {
              fn: async function redo(this: UndoRedoAction, id: string) {
                await deleteRowById(id)
                const pk: Record<string, string> = rowPkData(row.row, meta?.value?.columns as ColumnType[])
                const rowIndex = findIndexByPk(pk, formattedData.value)
                if (rowIndex !== -1) formattedData.value.splice(rowIndex, 1)
                paginationData.value.totalRows = paginationData.value.totalRows! - 1
              },
              args: [id],
            },
            undo: {
              fn: async function undo(
                this: UndoRedoAction,
                row: Row,
                ltarState: Record<string, any>,
                pg: { page: number; pageSize: number },
              ) {
                const pkData = rowPkData(row.row, meta.value?.columns as ColumnType[])
                row.row = { ...pkData, ...row.row }
                await insertRow(row, ltarState, {}, true)
                recoverLTARRefs(row.row)
                if (rowIndex !== -1 && pg.pageSize === paginationData.value.pageSize) {
                  if (pg.page === paginationData.value.page) {
                    formattedData.value.splice(rowIndex, 0, row)
                  } else {
                    await callbacks?.changePage?.(pg.page)
                  }
                } else {
                  await callbacks?.loadData?.()
                }
              },
              args: [clone(row), {}, { page: paginationData.value.page, pageSize: paginationData.value.pageSize }],
            },
            scope: defineViewScope({ view: viewMeta.value }),
          })
        }
      }

      formattedData.value.splice(rowIndex, 1)

      await callbacks?.syncCount?.()
    } catch (e: any) {
      message.error(`${t('msg.error.deleteRowFailed')}: ${await extractSdkResponseErrorMsg(e)}`)
    }

    await callbacks?.globalCallback?.()
  }

  async function deleteSelectedRows() {
    let row = formattedData.value.length
    const removedRowsData: { id?: string; row: Row; rowIndex: number }[] = []
    while (row--) {
      try {
        const { row: rowObj, rowMeta } = formattedData.value[row] as Record<string, any>
        if (!rowMeta.selected) {
          continue
        }
        if (!rowMeta.new) {
          const id = meta?.value?.columns
            ?.filter((c) => c.pk)
            .map((c) => rowObj[c.title as string])
            .join('___')

          const successfulDeletion = await deleteRowById(id as string)
          if (!successfulDeletion) {
            continue
          }
          removedRowsData.push({ id, row: clone(formattedData.value[row]), rowIndex: row })
        }
        formattedData.value.splice(row, 1)
      } catch (e: any) {
        return message.error(`${t('msg.error.deleteRowFailed')}: ${await extractSdkResponseErrorMsg(e)}`)
      }
    }

    addUndo({
      redo: {
        fn: async function redo(this: UndoRedoAction, removedRowsData: { id?: string; row: Row; rowIndex: number }[]) {
          for (const { id, row } of removedRowsData) {
            await deleteRowById(id as string)
            const pk: Record<string, string> = rowPkData(row.row, meta?.value?.columns as ColumnType[])
            const rowIndex = findIndexByPk(pk, formattedData.value)
            if (rowIndex !== -1) formattedData.value.splice(rowIndex, 1)
            paginationData.value.totalRows = paginationData.value.totalRows! - 1
          }
          await callbacks?.syncPagination?.()
        },
        args: [removedRowsData],
      },
      undo: {
        fn: async function undo(
          this: UndoRedoAction,
          removedRowsData: { id?: string; row: Row; rowIndex: number }[],
          pg: { page: number; pageSize: number },
        ) {
          for (const { row, rowIndex } of removedRowsData.slice().reverse()) {
            const pkData = rowPkData(row.row, meta.value?.columns as ColumnType[])
            row.row = { ...pkData, ...row.row }
            await insertRow(row, {}, {}, true)
            recoverLTARRefs(row.row)
            if (rowIndex !== -1 && pg.pageSize === paginationData.value.pageSize) {
              if (pg.page === paginationData.value.page) {
                formattedData.value.splice(rowIndex, 0, row)
              } else {
                await callbacks?.changePage?.(pg.page)
              }
            } else {
              await callbacks?.loadData?.()
            }
          }
        },
        args: [removedRowsData, { page: paginationData.value.page, pageSize: paginationData.value.pageSize }],
      },
      scope: defineViewScope({ view: viewMeta.value }),
    })

    await callbacks?.syncCount?.()
    await callbacks?.syncPagination?.()
    await callbacks?.globalCallback?.()
  }

  async function deleteRangeOfRows(cellRange: CellRange) {
    if (!cellRange._start || !cellRange._end) return
    const start = Math.max(cellRange._start.row, cellRange._end.row)
    const end = Math.min(cellRange._start.row, cellRange._end.row)

    // plus one because we want to include the end row
    let row = start + 1

    const removedRowsData: { id?: string; row: Row; rowIndex: number }[] = []
    while (row--) {
      try {
        const { row: rowObj, rowMeta } = formattedData.value[row] as Record<string, any>
        if (!rowMeta.new) {
          const id = meta?.value?.columns
            ?.filter((c) => c.pk)
            .map((c) => rowObj[c.title as string])
            .join('___')

          const successfulDeletion = await deleteRowById(id as string)
          if (!successfulDeletion) {
            continue
          }
          removedRowsData.push({ id, row: clone(formattedData.value[row]), rowIndex: row })
        }
        formattedData.value.splice(row, 1)
      } catch (e: any) {
        return message.error(`${t('msg.error.deleteRowFailed')}: ${await extractSdkResponseErrorMsg(e)}`)
      }

      if (row === end) break
    }

    addUndo({
      redo: {
        fn: async function redo(this: UndoRedoAction, removedRowsData: { id?: string; row: Row; rowIndex: number }[]) {
          for (const { id, row } of removedRowsData) {
            await deleteRowById(id as string)
            const pk: Record<string, string> = rowPkData(row.row, meta?.value?.columns as ColumnType[])
            const rowIndex = findIndexByPk(pk, formattedData.value)
            if (rowIndex !== -1) formattedData.value.splice(rowIndex, 1)
            paginationData.value.totalRows = paginationData.value.totalRows! - 1
          }
          await callbacks?.syncPagination?.()
        },
        args: [removedRowsData],
      },
      undo: {
        fn: async function undo(
          this: UndoRedoAction,
          removedRowsData: { id?: string; row: Row; rowIndex: number }[],
          pg: { page: number; pageSize: number },
        ) {
          for (const { row, rowIndex } of removedRowsData.slice().reverse()) {
            const pkData = rowPkData(row.row, meta.value?.columns as ColumnType[])
            row.row = { ...pkData, ...row.row }
            await insertRow(row, {}, {}, true)
            if (rowIndex !== -1 && pg.pageSize === paginationData.value.pageSize) {
              if (pg.page === paginationData.value.page) {
                formattedData.value.splice(rowIndex, 0, row)
              } else {
                await callbacks?.changePage?.(pg.page)
              }
            } else {
              await callbacks?.loadData?.()
            }
          }
        },
        args: [removedRowsData, { page: paginationData.value.page, pageSize: paginationData.value.pageSize }],
      },
      scope: defineViewScope({ view: viewMeta.value }),
    })

    await callbacks?.syncCount?.()
    await callbacks?.syncPagination?.()
    await callbacks?.globalCallback?.()
  }

  const removeRowIfNew = (row: Row) => {
    const index = formattedData.value.indexOf(row)

    if (index > -1 && row.rowMeta.new) {
      formattedData.value.splice(index, 1)
      return true
    }
    return false
  }

  return {
    insertRow,
    updateRowProperty,
    addEmptyRow,
    deleteRow,
    deleteRowById,
    deleteSelectedRows,
    deleteRangeOfRows,
    updateOrSaveRow,
    bulkUpdateRows,
    bulkUpdateView,
    selectedAllRecords,
    removeRowIfNew,
  }
}