import type { AuditLogEntry } from "~/models/audit-log";

export const AUDIT_ACTION_LABELS: Record<string, string> = {
  league_settings_changed: "League Settings Changed",
  draft_settings_changed: "Draft Settings Changed",
  scoring_rules_changed: "Scoring Rules Changed",
  draft_order_set: "Draft Order Set",
  draft_order_randomized: "Draft Order Randomized",
  draft_started: "Draft Started",
  draft_paused: "Draft Paused",
  draft_resumed: "Draft Resumed",
  draft_reset: "Draft Reset",
  draft_rollback: "Draft Rolled Back",
  force_autopick: "Forced Auto-Pick",
  force_manual_pick: "Forced Manual Pick",
  draft_pick_changed: "Pick Replaced",
  time_bank_edited: "Time Bank Edited",
};

function formatSeconds(seconds: number): string {
  const m = Math.floor(Math.abs(seconds) / 60);
  const s = Math.abs(seconds) % 60;
  const sign = seconds < 0 ? "-" : "+";
  if (m === 0) return `${sign}${s}s`;
  return `${sign}${m}m ${s}s`;
}

function formatTimeRemaining(seconds: number): string {
  const m = Math.floor(seconds / 60);
  const s = seconds % 60;
  return `${m}:${String(s).padStart(2, "0")}`;
}

/**
 * Returns a concise human-readable summary of an audit log entry.
 * Shared between the league home page summary widget and the full audit log page.
 */
export function formatAuditDetail(entry: AuditLogEntry): string {
  const d = (entry.details ?? {}) as Record<string, unknown>;

  switch (entry.action) {
    case "draft_rollback":
      return `Rolled back to pick #${d.rolledBackToPickNumber}`;

    case "time_bank_edited": {
      const adj = Number(d.adjustment ?? 0);
      const remaining = Number(d.newTimeRemaining ?? 0);
      return `${formatSeconds(adj)} for ${d.teamName ?? "team"} (now ${formatTimeRemaining(remaining)})`;
    }

    case "draft_pick_changed":
      return `Pick #${d.pickNumber}: ${d.oldParticipantName} → ${d.newParticipantName}`;

    case "force_autopick":
      return `Auto-picked ${d.participantName} for ${d.teamName} at pick #${d.pickNumber}`;

    case "force_manual_pick":
      return `Picked ${d.participantName} for ${d.teamName} at pick #${d.pickNumber}`;

    case "draft_order_set":
      return "Draft order manually set";

    case "draft_order_randomized":
      return "Draft order randomized";

    case "draft_reset": {
      const prev = d.previousPickNumber;
      return prev !== null && prev !== undefined
        ? `Draft reset (was at pick #${prev})`
        : "Draft reset";
    }

    case "league_settings_changed": {
      const fields = (d.changedFields as string[] | undefined) ?? [];
      return fields.length > 0
        ? `Changed: ${fields.join(", ")}`
        : "League settings updated";
    }

    case "draft_settings_changed": {
      const fields = (d.changedFields as string[] | undefined) ?? [];
      return fields.length > 0
        ? `Changed: ${fields.join(", ")}`
        : "Draft settings updated";
    }

    case "scoring_rules_changed":
      return "Scoring rules updated";

    case "draft_started":
      return "Draft started";

    case "draft_paused":
      return d.pickNumber !== null && d.pickNumber !== undefined
        ? `Draft paused at pick #${d.pickNumber}`
        : "Draft paused";

    case "draft_resumed":
      return d.pickNumber !== null && d.pickNumber !== undefined
        ? `Draft resumed at pick #${d.pickNumber}`
        : "Draft resumed";

    default:
      return (entry.action as string).replace(/_/g, " ");
  }
}