import { getAllRows, getRowById, insertRow, updateRow } from '../crud'
import type { Assignment, AssignmentType, Consultant } from '../../../src/db/types'

export const listAssignments = (): Assignment[] => getAllRows<Assignment>('assignments')
export const listAssignmentsNewestFirst = (): Assignment[] =>
  getAllRows<Assignment>('assignments').sort((a, b) => new Date(b.createdAt).getTime() - new Date(a.createdAt).getTime())
export const getAssignment = (id: number): Assignment | undefined => getRowById<Assignment>('assignments', id)
export const addAssignment = (a: Omit<Assignment, 'id'>): number => insertRow('assignments', a)
export const updateAssignment = (id: number, patch: Partial<Assignment>): number => updateRow('assignments', id, patch)

export interface AssignmentWithDetails extends Assignment {
  typeName: string
  instituteeNames: string[]
}

/** Für die Dashboard-Liste: Assignments mit aufgelöstem Typ- und Institutee-Namen, neueste zuerst. */
export function listAssignmentsWithDetails(): AssignmentWithDetails[] {
  const raw = listAssignmentsNewestFirst()
  const types = getAllRows<AssignmentType>('assignmentTypes')
  const consultants = getAllRows<Consultant>('consultants')
  const typeMap = new Map<number, AssignmentType>(types.map(t => [t.id!, t]))
  const consMap = new Map<number, Consultant>(consultants.map(c => [c.id!, c]))
  return raw.map(a => ({
    ...a,
    typeName: typeMap.get(a.assignmentTypeId)?.name ?? '—',
    instituteeNames: a.instituteeIds.map(id => {
      const c = consMap.get(id)
      return c ? `${c.firstName} ${c.lastName}` : '?'
    }),
  }))
}