import { resolveScheduleTimestamp } from './schedule-time.mjs';
import { shouldAutoCreateReminderAtStart } from './schedule-service.mjs';
import {
  isScheduledTaskWorkerEnabled,
  scheduledTaskWorkerDisabledMessage,
} from './scheduled-task-worker-config.mjs';

export async function executeScheduledTaskCreateTool(args, {
  userId,
  scheduledTaskService,
  timezone = 'Asia/Shanghai',
  env = process.env,
} = {}) {
  if (!scheduledTaskService) throw new Error('scheduledTaskService 不可用');
  const task = await scheduledTaskService.createTask({
    userId,
    title: args.title ?? null,
    taskSpec: args.taskSpec,
    recurrence: args.recurrence ?? 'daily',
    runAtLocal: args.runAtLocal ?? null,
    hour: args.hour ?? null,
    minute: args.minute ?? 0,
    weekday: args.weekday ?? null,
    timezone: args.timezone ?? timezone,
    notifyChannel: args.notifyChannel ?? 'both',
    sourceChannel: args.sourceChannel ?? 'agent',
    sourceMessageId: args.sourceMessageId ?? null,
    sourceText: args.sourceText ?? null,
  });
  const workerWarning = isScheduledTaskWorkerEnabled(env)
    ? null
    : scheduledTaskWorkerDisabledMessage(env);
  return workerWarning ? { ...task, workerWarning } : task;
}

export async function executeScheduledTaskUpdateSpecTool(args, {
  userId,
  scheduledTaskService,
} = {}) {
  if (!scheduledTaskService) throw new Error('scheduledTaskService 不可用');
  return scheduledTaskService.updateTaskSpec({
    userId,
    taskId: args.taskId,
    taskSpec: args.taskSpec ?? null,
    title: args.title ?? null,
    mergeTaskSpec: Boolean(args.mergeTaskSpec),
  });
}

export async function executeScheduleCreateItemTool(args, {
  userId,
  scheduleService,
  timezone = 'Asia/Shanghai',
} = {}) {
  if (!scheduleService) throw new Error('scheduleService 不可用');
  const tz = args.timezone ?? timezone;
  const startAt = resolveScheduleTimestamp({
    epochMs: args.startAt,
    localString: args.startLocal,
    timezone: tz,
    fieldName: '开始时间',
  });
  const endAt = resolveScheduleTimestamp({
    epochMs: args.endAt,
    localString: args.endLocal,
    timezone: tz,
    fieldName: '结束时间',
  });
  const dueAt = resolveScheduleTimestamp({
    epochMs: args.dueAt,
    localString: args.dueLocal,
    timezone: tz,
    fieldName: '截止时间',
  });
  const item = await scheduleService.createItem({
    userId,
    kind: args.kind,
    title: args.title,
    description: args.description ?? null,
    startAt,
    endAt,
    dueAt,
    allDay: Boolean(args.allDay),
    timezone: tz,
    location: args.location ?? null,
    sourceChannel: args.sourceChannel ?? 'agent',
    sourceMessageId: args.sourceMessageId ?? null,
    sourceText: args.sourceText ?? null,
    metadata: args.metadata ?? { source: 'agent_tool' },
  });
  let remindAt = resolveScheduleTimestamp({
    epochMs: args.remindAt,
    localString: args.remindLocal,
    timezone: tz,
    fieldName: '提醒时间',
  });
  if (
    remindAt == null
    && shouldAutoCreateReminderAtStart({
      title: args.title,
      description: args.description,
      startAt,
      noReminder: Boolean(args.noReminder),
    })
  ) {
    remindAt = startAt;
  }
  if (remindAt != null) {
    const reminder = await scheduleService.createReminder({
      userId,
      itemId: item.id,
      remindAt,
      offsetMinutes: args.offsetMinutes ?? null,
      channel: args.channel ?? 'wechat',
    });
    return { item, reminder };
  }
  return { item };
}

export async function executeScheduleCreateReminderTool(args, {
  userId,
  scheduleService,
  timezone = 'Asia/Shanghai',
} = {}) {
  if (!scheduleService) throw new Error('scheduleService 不可用');
  const tz = args.timezone ?? timezone;
  const remindAt = resolveScheduleTimestamp({
    epochMs: args.remindAt,
    localString: args.remindLocal,
    timezone: tz,
    fieldName: '提醒时间',
  });
  if (remindAt == null) throw new Error('缺少提醒时间 remindLocal 或 remindAt');
  const reminder = await scheduleService.createReminder({
    userId,
    itemId: args.itemId,
    remindAt,
    offsetMinutes: args.offsetMinutes ?? null,
    channel: args.channel ?? 'wechat',
  });
  return reminder;
}

export async function commitAgentSideEffectTool(toolName, toolArgs, services) {
  const name = String(toolName ?? '').trim();
  if (name === 'scheduled_task_create') {
    const task = await executeScheduledTaskCreateTool(toolArgs, services);
    return { kind: 'scheduled_task', task };
  }
  if (name === 'scheduled_task_update_spec') {
    const task = await executeScheduledTaskUpdateSpecTool(toolArgs, services);
    return { kind: 'scheduled_task', task, updated: true };
  }
  if (name === 'schedule_create_item') {
    const result = await executeScheduleCreateItemTool(toolArgs, services);
    return { kind: 'schedule_item', ...result };
  }
  if (name === 'schedule_create_reminder') {
    const reminder = await executeScheduleCreateReminderTool(toolArgs, services);
    return { kind: 'schedule_reminder', reminder };
  }
  throw new Error(`不支持的 agent 副作用工具：${name}`);
}