/**
 * Light membership roles — Phase 4/5 preview.
 * Deep paid tiers + chain permissioning come later.
 */

export type MemberRole =
  | "viewer"
  | "portal_member"
  | "wallet_member"
  | "operator";

export type MembershipProfile = {
  primary: MemberRole;
  roles: MemberRole[];
  tierLabel: string;
  blurb: string;
};

const ROLE_META: Record<
  MemberRole,
  { label: string; can: string[] }
> = {
  viewer: {
    label: "Viewer",
    can: ["Open explorer", "Read docs"],
  },
  portal_member: {
    label: "Portal member",
    can: ["Dashboard", "Save session", "Request access later"],
  },
  wallet_member: {
    label: "Wallet member",
    can: ["Show linked address", "Local anvil chain switch"],
  },
  operator: {
    label: "Operator",
    can: ["Machine keys (M2M)", "Worker APIs — later"],
  },
};

export function roleLabel(role: MemberRole): string {
  return ROLE_META[role].label;
}

export function roleCapabilities(role: MemberRole): string[] {
  return ROLE_META[role].can;
}

/**
 * Derive light roles from how the person signed in.
 * Not security-critical yet — UI honesty only.
 */
export function membershipFor(input: {
  isSignedIn: boolean;
  source: "briven" | "demo" | "wallet" | "konnos" | null;
  walletAddress?: string | null;
  label?: string | null;
}): MembershipProfile {
  if (!input.isSignedIn) {
    return {
      primary: "viewer",
      roles: ["viewer"],
      tierLabel: "Guest",
      blurb: "Sign in or connect a wallet for a personal dashboard.",
    };
  }

  const roles = new Set<MemberRole>(["viewer"]);

  if (input.source === "wallet" || input.walletAddress) {
    roles.add("wallet_member");
  }
  if (input.source === "briven" || input.source === "demo") {
    roles.add("portal_member");
  }
  // Placeholder: later map Briven project roles / M2M operator claims
  if (input.label?.toLowerCase().includes("operator")) {
    roles.add("operator");
  }

  const list = Array.from(roles);
  const primary: MemberRole = list.includes("operator")
    ? "operator"
    : list.includes("wallet_member") && !list.includes("portal_member")
      ? "wallet_member"
      : list.includes("portal_member")
        ? "portal_member"
        : "viewer";

  const tierLabel =
    primary === "operator"
      ? "Operator preview"
      : primary === "wallet_member"
        ? "Wallet member"
        : "Portal member";

  const blurb =
    primary === "wallet_member"
      ? "You connected a browser wallet. Full chain membership (validators, gated APIs) lands later."
      : primary === "operator"
        ? "Operator-style access is preview-only. M2M machine clients power background jobs."
        : "You have a portal session. Paid tiers and network membership roles come later.";

  return { primary, roles: list, tierLabel, blurb };
}