Task and task types

import type {
  DependencyType,
  Task,
  TaskDependency,
  TaskTransformed,
  TaskType,
} from '@jaeungkim/gantt-chart';

export type TaskType = 'task' | 'milestone';

export type DependencyType = 'FS' | 'SS' | 'FF' | 'SF';

export interface TaskDependency {
  /** The predecessor's id - a task's `dependencies` list the tasks it waits on */
  targetId: string;
  type: DependencyType;
  /**
   * Signed delay between the two ends of the link, in days
   *
   * Positive is lag (wait this long after the predecessor), negative is lead (overlap).
   * Counted in working days when the working-day calendar is on, calendar days otherwise.
   */
  lag?: number;
}

export interface Task {
  id: string;
  name: string;
  startDate: string;
  endDate: string;
  parentId: string | null;
  sequence: string;
  /** Task kind - 'milestone' renders as a diamond at startDate (default 'task') */
  type?: TaskType;
  /** Progress 0-100 (%) - omitted means no progress display */
  progress?: number;
  /**
   * Bar color - any CSS color value
   *
   * The progress fill and the hover shade are derived from it, so one value colors the
   * whole bar. Omitted, the `--gantt-*` theme tokens decide as before.
   */
  color?: string;
  /** Extra class name put on this task's bar and its task-list row */
  className?: string;
  /**
   * Swimlane this task shares a row with
   *
   * Tasks with the same lane (inside the same group) are drawn side by side on one
   * row; overlapping ones stack onto extra rows automatically. Omitted, the task
   * gets a row of its own as before.
   */
  lane?: string;
  dependencies?: TaskDependency[];
  /** Blocks every gesture on this task - overrides the chart's `readOnly` prop */
  readOnly?: boolean;
  /** Allows/blocks moving this task - overrides both `readOnly` settings */
  allowMove?: boolean;
  /** Allows/blocks resizing this task - overrides both `readOnly` settings */
  allowResize?: boolean;
  /** Allows/blocks dragging this task's progress handle - overrides both `readOnly` settings */
  allowProgressChange?: boolean;
  /** Allows/blocks starting a dependency drag from this task - overrides both `readOnly` settings */
  allowLinkCreate?: boolean;
  /** Allows/blocks deleting a dependency this task owns - overrides both `readOnly` settings */
  allowLinkDelete?: boolean;
  /** Earliest date this task may be dragged to (ISO string) - overrides the chart's `minDate` */
  minDate?: string;
  /** Latest date this task may be dragged to (ISO string) - overrides the chart's `maxDate` */
  maxDate?: string;
  /** The scheduling engine never moves this task; it still constrains its successors */
  manuallyScheduled?: boolean;
  /** Planned start snapshot - drawn as a thin bar under the live one (UTC ISO string) */
  baselineStart?: string;
  /** Planned end snapshot (UTC ISO string) */
  baselineEnd?: string;
}

export interface TaskTransformed extends Task {
  barLeft: number;
  barWidth: number;
  depth: number;
  order: number;
  originalOrder: number;
  /**
   * A summary row with children (true only when hierarchy is on)
   *
   * Its start/end are recomputed from the children, so resizing and progress editing are
   * disabled and dragging the bar moves the whole subtree.
   */
  isSummary?: boolean;
  dependencies?: TaskDependency[];
  /** Baseline bar geometry - present only when the task carries baseline dates */
  baselineLeft?: number;
  baselineWidth?: number;
  /** CPM outputs - present only while the `criticalPath` prop is on (read-only) */
  earlyStart?: string;
  earlyFinish?: string;
  lateStart?: string;
  lateFinish?: string;
  totalSlack?: number;
  freeSlack?: number;
  critical?: boolean;
  /** Duration in calendar days, or working days when the working-day calendar is on */
  duration?: number;
}