/** Shared between the mirror engine and the settings page. */

export type MirrorDirection = "both" | "pull" | "push";
export type ConflictStrategy = "merge" | "prefer-local" | "prefer-remote";
export type MirrorTrigger = "schedule" | "webhook" | "push" | "manual";

export const MIRROR_DIRECTIONS: MirrorDirection[] = ["both", "pull", "push"];
export const CONFLICT_STRATEGIES: ConflictStrategy[] = ["merge", "prefer-local", "prefer-remote"];

export const DIRECTION_LABELS: Record<MirrorDirection, string> = {
  both: "Bidirectional (pull and push)",
  pull: "Pull only (remote → here)",
  push: "Push only (here → remote)",
};

export const STRATEGY_LABELS: Record<ConflictStrategy, string> = {
  merge: "Auto-merge; park conflicts for review",
  "prefer-local": "Auto-merge; conflicting lines keep this repository's side",
  "prefer-remote": "Auto-merge; conflicting lines keep the remote's side",
};

export type MirrorConflict = {
  ref: string;
  reason: string;
  paths: string[];
  localSha: string | null;
  remoteSha: string | null;
  /** Branch holding the remote tip so it can be merged by hand (in a pull request or locally). */
  parkedAs: string | null;
};

export type SyncReport = {
  pulled: string[];
  pushed: string[];
  merged: string[];
  deletedLocal: string[];
  deletedRemote: string[];
  conflicts: MirrorConflict[];
  refused: string[];
  skipped: number;
};

export type MirrorRun = {
  startedAt: number;
  finishedAt: number;
  trigger: MirrorTrigger;
  error: string | null;
  report: SyncReport | null;
};

export type MirrorStatus = {
  enabled: boolean;
  remoteUrl: string;
  username: string | null;
  hasToken: boolean;
  direction: MirrorDirection;
  strategy: ConflictStrategy;
  branches: string[];
  syncTags: boolean;
  propagateDeletes: boolean;
  configuredBy: string;
  hourly: boolean;
  nextRunAt: number | null;
  pendingAt: number | null;
  running: boolean;
  eventsToday: number;
  eventBudget: number;
  runs: MirrorRun[];
};