import {
  DEFAULT_AGENT_ID,
  DEFAULT_CHANNEL_ACCOUNT_ID,
  DEFAULT_MAIN_SESSION_SUFFIX,
  buildAgentSessionKey,
  buildMainSessionKey,
  buildChannelAccountOwnerKey,
  normalizeAgentId,
  normalizeChannelAccountId,
  normalizeChannelType,
  normalizeSessionSuffix,
  parseChannelAccountOwnerKey,
  resolveChannelAccountOwner,
  type AgentSummary,
  type AgentChannelBinding,
  type AgentChannelBindingInput,
  type AgentChannelUnbindingInput,
  type AgentsSnapshot,
} from './agents';

export type ModelSummary = AgentSummary;
export const DEFAULT_MODEL_ID = DEFAULT_AGENT_ID;

export type ModelsSnapshot = AgentsSnapshot & {
  models: ModelSummary[];
  agents?: ModelSummary[];
};

export interface ParsedSessionKey {
  sessionKey: string;
  agentId: string;
  sessionId: string;
  isAgentSession: boolean;
}

export function parseSessionKey(sessionKey: string): ParsedSessionKey {
  const trimmed = String(sessionKey ?? '').trim();

  if (trimmed.startsWith('agent:')) {
    const parts = trimmed.split(':');
    const agentId = normalizeAgentId(parts[1]);
    const sessionId = normalizeSessionSuffix(parts.slice(2).join(':'));
    return {
      sessionKey: buildAgentSessionKey(agentId, sessionId),
      agentId,
      sessionId,
      isAgentSession: true,
    };
  }

  if (trimmed.startsWith('local:')) {
    const parts = trimmed.split(':');
    const agentId = normalizeAgentId(parts[1]);
    const sessionId = normalizeSessionSuffix(parts.slice(2).join(':'));
    return {
      sessionKey: buildAgentSessionKey(agentId, sessionId),
      agentId,
      sessionId,
      isAgentSession: true,
    };
  }

  return {
    sessionKey: trimmed,
    agentId: DEFAULT_AGENT_ID,
    sessionId: normalizeSessionSuffix(trimmed),
    isAgentSession: false,
  };
}

export function normalizeAgentSessionKey(sessionKey: string): string {
  return parseSessionKey(sessionKey).sessionKey;
}

export const normalizeModelId = normalizeAgentId;
export const buildModelSessionKey = buildAgentSessionKey;
export const normalizeModelSessionKey = normalizeAgentSessionKey;

export {
  DEFAULT_AGENT_ID,
  DEFAULT_CHANNEL_ACCOUNT_ID,
  DEFAULT_MAIN_SESSION_SUFFIX,
  buildAgentSessionKey,
  buildMainSessionKey,
  buildChannelAccountOwnerKey,
  normalizeAgentId,
  normalizeChannelAccountId,
  normalizeChannelType,
  normalizeSessionSuffix,
  parseChannelAccountOwnerKey,
  resolveChannelAccountOwner,
};

export type {
  AgentSummary,
  AgentChannelBinding,
  AgentChannelBindingInput,
  AgentChannelUnbindingInput,
  AgentsSnapshot,
};