import type { Spending } from './Spending'

export class User {
  name: string
  spendings: Array<Spending>

  constructor(name: string) {
    this.name = name
    this.spendings = Array<Spending>()
  }

  addSpending(spending: Spending): void {
    spending.setSpender(this)
    this.spendings.push(spending)
  }

  getTotalSpending(): number {
    return this.spendings.map((w) => w.amountCt).reduce((acc, num) => acc + num, 0)
  }

  getInitials(): string {
    if (!this.name) return ''

    const words = this.name
      .trim()
      .split(/\s+/)
      .filter((word) => word.length > 0)

    if (words.length === 0) return ''

    if (words.length === 1) {
      const firstWord = words[0]
      if (!firstWord || firstWord.length === 0) return ''
      return firstWord.substring(0, 2).toUpperCase()
    }

    const firstWord = words[0]
    const secondWord = words[1]
    if (!firstWord || !secondWord || firstWord.length === 0 || secondWord.length === 0) return ''

    return (firstWord[0]! + secondWord[0]!).toUpperCase()
  }
}