import type { GoalCondition, OnboardingGoal } from "@deadhead/content";

/** The facts about a player that onboarding goals are checked against. */
export interface GoalProgress {
  /** Contracts delivered by the player's own ships (tutorial runs excluded). */
  ownShipDeliveries: number;
  /** Skill points spent across all pilots. */
  skillPointsSpent: number;
  shipsOwned: number;
  /** Pilots hired (the avatar excluded). */
  pilotsHired: number;
  /** Resolved contract deliveries (not deadheads) flown by the veteran (CR-010). */
  veteranContracts: number;
  /** Locations discovered beyond the ones that start discovered. */
  locationsDiscovered: number;
  dealAccepted: boolean;
  loanBalance: number;
}

export function isGoalConditionMet(condition: GoalCondition, progress: GoalProgress): boolean {
  switch (condition.kind) {
    case "own-ship-deliveries":
      return progress.ownShipDeliveries >= condition.count;
    case "skill-points-spent":
      return progress.skillPointsSpent >= condition.count;
    case "ships-owned":
      return progress.shipsOwned >= condition.count;
    case "pilots-hired":
      return progress.pilotsHired >= condition.count;
    case "veteran-contracts":
      return progress.veteranContracts >= condition.count;
    case "locations-discovered":
      return progress.locationsDiscovered >= condition.count;
    case "loan-paid-off":
      // Only a loan that was taken can be paid off.
      return progress.dealAccepted && progress.loanBalance <= 0;
  }
}

/** Ids of the goals whose conditions are met, in the goals' order (decision 0.5.34). */
export function completedGoals(goals: readonly OnboardingGoal[], progress: GoalProgress): string[] {
  return goals.filter((goal) => isGoalConditionMet(goal.condition, progress)).map((g) => g.id);
}