import {
  deriveGoalTitleFromText,
  extractUserMessageDisplayText,
  isGoalRunEnabledForUser,
  isGoalRunIntent,
} from './goal-run-intent.mjs';

export async function resolveGoalBindingForAgentRun({
  goalRunService = null,
  chatIntentRouter = null,
  userId,
  userMessage,
  sessionId = null,
  body = {},
  env = process.env,
} = {}) {
  if (!goalRunService || !isGoalRunEnabledForUser(userId, env)) {
    return null;
  }

  const explicitGoalRunId = String(body.goal_run_id ?? body.goalRunId ?? '').trim() || null;
  if (explicitGoalRunId) {
    const goal = await goalRunService.getGoalRun({ userId, goalRunId: explicitGoalRunId });
    if (!goal) {
      const error = new Error('目标不存在');
      error.code = 'GOAL_RUN_NOT_FOUND';
      error.status = 404;
      throw error;
    }
    const started = await goalRunService.startNextCheckpoint({
      userId,
      goalRunId: explicitGoalRunId,
    });
    return {
      goalRunId: explicitGoalRunId,
      goalCheckpointId: started.checkpointId,
    };
  }

  const displayText = extractUserMessageDisplayText(userMessage);
  let shouldCreateGoal = isGoalRunIntent(displayText);
  if (!shouldCreateGoal && chatIntentRouter?.classify) {
    const classification = await chatIntentRouter.classify({
      userId,
      userMessage,
      sessionId,
      toolMode: 'chat',
    });
    shouldCreateGoal = classification?.decision?.flags?.includes('goal_run') === true;
  }
  if (!shouldCreateGoal) return null;

  const goal = await goalRunService.createGoalRun({
    userId,
    title: deriveGoalTitleFromText(displayText),
    intentSummary: displayText || '长期任务',
    sourceSessionId: sessionId,
  });
  const started = await goalRunService.startNextCheckpoint({
    userId,
    goalRunId: goal.id,
  });
  return {
    goalRunId: goal.id,
    goalCheckpointId: started.checkpointId,
  };
}