/**
 * Data about an time period.
 */
export default class Period {
  /** The ID of the Period. */
  id : string;

  /** The ID of the owning user. */
  userId : string;

  /** The inclusive start time. */
  from : Date;

  /** The exclusive end date. */
  to : Date;

  /** The name of the time period, usually generated.*/
  name : string;

  /**
   * Tags used to explain the goals being out of the ordinary. For example,
   * if leaving for a vacation where hobbies are best put on hold.
   */
  tags : string[];

  /** The goals set for this time period. */
  goals : PeriodGoal[];

  /** Logged activities during this time period. */
  logs : PeriodLog[];
}

/**
 * A goal set during the period.
 */
export class PeriodGoal {
  /** The ID of the PeriodGoal. */
  id : string

  /** The activity ID associated with the goal. */
  activityId : string

  /** The point count for the goal. 1000 is usually considered an hour's work. */
  pointCount : number

  /** Optional sub-goals. */
  subGoals : PeriodSubGoal[];
}

/**
 * Optional sub-goals so that the user can award more points on important
 * activities and not use up all the points on time-sinking guilty pleasures.
 */
export class PeriodSubGoal {
  /** The ID of the PeriodSubGoal. */
  id : string;

  /** A short name of the sub goal. */
  name : string;

  /** The multiplier applied to the score. 1.10 = 10% better. */
  multiplier : number;
}

/**
 * A logged activity during this time period.
 */
export class PeriodLog {
  /** The ID of the PeriodLog. */
  id : string;

  /** The ID of the PeriodLog. */
  date : Date;

  /** The ID of the sub-activity performed (see goal for activity id) */
  subActivityId : string;

  /** The ID of the goal. */
  goalId : string;

  /** The applicable sub goal, or `null` if none. */
  subGoalId : string;

  /** A description of the activity performed. */
  description : string;

  /** The amount of units done. */
  amount : number

  /** The calculated score and its breakdown. */
  score : PeriodLogScore
}

/**
 * The PeriodLogScore is a score for the log. This may not reflect the 
 * latest numbers.
 */
export class PeriodLogScore {
  /** The amount of activity done (e.g number of words or minutes). */
  amount : number;

  /** The score that's worth. */
  activityScore : number;

  /** The subgoal multiplier in effect. */
  subGoalMultiplier : number;

  /** The daily bonus, or 0 if not applicable. */
  dailyBonus : number;

  /** The total score. */
  total : number;
}

export interface PeriodUpdate {
  setFrom?: Date
  setTo?: Date
  setName?: string

  addLog?: PeriodLog
  removeLog?: string
  addGoal?: PeriodGoal
  replaceGoal?: PeriodGoal
  removeGoal?: string
  
  addTag?: string
  removeTag?: String
}