import { createColumnHelper } from '@tanstack/react-table'
import { useAtom, useAtomValue, useSetAtom } from 'jotai'
import { useMemo } from 'react'
import {
  currentItemSelectionAtom,
  itemSelectionSetActionAtom,
  mouseDragSelectionStateAtom,
} from '@/state/atoms'
import { StatsColumns } from '../columns'
import { ItemWithSelection } from './defs'

const ch = createColumnHelper<ItemWithSelection>()

const columns = {
  icon: ch.display({
    id: 'icon',
    header: function Component(_col) {
      return <div className="flex flex-row justify-center"></div>
    },
    cell: function Component({ row }) {
      const setItemSelection = useSetAtom(itemSelectionSetActionAtom)
      const c = useAtomValue(currentItemSelectionAtom)
      const [dragState, setDragState] = useAtom(mouseDragSelectionStateAtom)
      const selected = useMemo(() => {
        return c[0].has(row.original.item.id)
      }, [c])

      const handleMouseDown = (e: React.MouseEvent) => {
        e.preventDefault()
        const newSelected = !selected
        setItemSelection({
          [row.original.item.id]: newSelected ? row.original.item.item_count : undefined,
        })
        setDragState({
          isDragging: true,
          lastAction: newSelected ? 'select' : 'deselect',
          lastItemId: row.original.item.id,
        })
      }

      const handleMouseEnter = () => {
        if (dragState.isDragging && dragState.lastItemId !== row.original.item.id) {
          if (dragState.lastAction === 'select' && !selected) {
            setItemSelection({
              [row.original.item.id]: row.original.item.item_count,
            })
          } else if (dragState.lastAction === 'deselect' && selected) {
            setItemSelection({
              [row.original.item.id]: undefined,
            })
          }
        }
      }

      return (
        <button
          type="button"
          className={`no-select flex flex-row ${row.original.status?.selected ? 'animate-pulse' : ''}`}
          onMouseDown={handleMouseDown}
          onMouseEnter={handleMouseEnter}
        >
          <div className="flex flex-row w-6 h-6 justify-center">
            <img
              src={row.original.item.item_image || ''}
              alt="icon"
              className="select-none object-contain pointer-events-none"
              draggable={false}
            />
          </div>
        </button>
      )
    },
  }),
  count: ch.display({
    id: 'count',
    header: function Component(_col) {
      return <div className="flex flex-row justify-center">#</div>
    },
    cell: function Component({ row }) {
      const c = useAtomValue(currentItemSelectionAtom)
      const setItemSelection = useSetAtom(itemSelectionSetActionAtom)
      const dragState = useAtomValue(mouseDragSelectionStateAtom)
      const currentValue = useMemo(() => {
        const got = c[0].get(row.original.item.id)
        if (got !== undefined) {
          return got.toString()
        }
        return ''
      }, [c])
      const itemCount = row.original.item.item_count
      const selected = useMemo(() => {
        return c[0].has(row.original.item.id)
      }, [c])

      const handleMouseEnter = () => {
        if (dragState.isDragging && dragState.lastItemId !== row.original.item.id) {
          if (dragState.lastAction === 'select' && !selected) {
            setItemSelection({
              [row.original.item.id]: row.original.item.item_count,
            })
          } else if (dragState.lastAction === 'deselect' && selected) {
            setItemSelection({
              [row.original.item.id]: undefined,
            })
          }
        }
      }

      return (
        // biome-ignore lint/a11y/useSemanticElements: Using div for layout with input child
        // biome-ignore lint/a11y/noStaticElementInteractions: Mouse interaction needed for drag select
        <div
          className={`flex flex-row select-none ${row.original.status?.selected ? 'bg-gray-200' : ''}`}
          onMouseEnter={handleMouseEnter}
        >
          <input
            className="w-10 text-center "
            value={currentValue}
            onChange={e => {
              if (e.target.value === '') {
                setItemSelection({ [row.original.item.id]: undefined })
                return
              }
              if (e.target.value === '-') {
                setItemSelection({
                  [row.original.item.id]: itemCount,
                })
              }
              let parsedInt = parseInt(e.target.value)
              if (Number.isNaN(parsedInt)) {
                return
              }
              if (parsedInt > itemCount) {
                parsedInt = itemCount
              }
              setItemSelection({
                [row.original.item.id]: parsedInt,
              })
            }}
            placeholder={itemCount.toString()}
          />
        </div>
      )
    },
  }),
  name: ch.display({
    id: 'name',
    header: _col => {
      return <div className="flex flex-row text-sm">name</div>
    },
    cell: function Component({ row }) {
      const c = useAtomValue(currentItemSelectionAtom)
      const setItemSelection = useSetAtom(itemSelectionSetActionAtom)
      const [dragState, setDragState] = useAtom(mouseDragSelectionStateAtom)
      const selected = useMemo(() => {
        return c[0].has(row.original.item.id)
      }, [c])

      const handleMouseEnter = () => {
        if (dragState.isDragging && dragState.lastItemId !== row.original.item.id) {
          if (dragState.lastAction === 'select' && !selected) {
            setItemSelection({
              [row.original.item.id]: row.original.item.item_count,
            })
          } else if (dragState.lastAction === 'deselect' && selected) {
            setItemSelection({
              [row.original.item.id]: undefined,
            })
          }
        }
      }

      const handleMouseDown = (e: React.MouseEvent) => {
        e.preventDefault()
        const newSelected = !selected
        setItemSelection({
          [row.original.item.id]: newSelected ? row.original.item.item_count : undefined,
        })
        setDragState({
          isDragging: true,
          lastAction: newSelected ? 'select' : 'deselect',
          lastItemId: row.original.item.id,
        })
      }

      return (
        // biome-ignore lint/a11y/useSemanticElements: Using div for text content
        // biome-ignore lint/a11y/noStaticElementInteractions: Mouse interaction needed for drag select
        <div
          className="flex flex-row whitespace-pre cursor-pointer select-none hover:bg-gray-100"
          onMouseEnter={handleMouseEnter}
          onMouseDown={handleMouseDown}
        >
          <span>{row.original.item.item_name}</span>
        </div>
      )
    },
  }),
  slots: ch.display({
    id: 'slots',
    header: _col => {
      return <div className="flex flex-row text-sm">slots</div>
    },
    cell: function Component({ row }) {
      return (
        <div className="flex flex-row justify-center">
          <span>{row.original.item.item_slots}</span>
        </div>
      )
    },
  }),
  stats: ch.group({
    id: 'stats',
    header: _col => {
      return <div className="flex flex-row text-sm">stats</div>
    },
    columns: [
      ...StatsColumns.map(c => {
        return ch.display({
          id: `stats.${c}`,
          header: _col => {
            return <div className="flex flex-row text-sm justify-center">{c}</div>
          },
          cell: function Component({ row }) {
            const stats = row.original.item.stats
            const stat = stats ? stats[c] : ''
            return (
              <div className={`flex flex-row justify-start ${stat ? 'border' : ''}`}>
                <span>{stat}</span>
              </div>
            )
          },
        })
      }),
    ],
  }),
} as const

export const InventoryColumns = columns