import request from '@/utils/request';
import type { Page } from '@/types/base';
import type { 
    WorkflowInstance, 
    WorkflowInstanceQuery, 
    TaskInstance, 
    TaskQuery,
    InstanceStatistics 
} from './types';

// 获取工作流实例列表
export async function getInstances(params: WorkflowInstanceQuery): Promise<Page<WorkflowInstance>> {
    return request.get('/api/v1/workflow/instances/page', { params });
}

// 获取单个工作流实例详情
export async function getInstanceDetail(id: number): Promise<WorkflowInstance> {
    return request.get(`/api/v1/workflow/instances/${id}`);
}

// 启动工作流实例
export async function startInstance(data: {
    workflowKey: string;
    businessKey?: string;
    variables?: Record<string, any>;
}): Promise<WorkflowInstance> {
    return request.post('/api/v1/workflow/instances/start', data);
}

// 终止工作流实例
export async function terminateInstance(id: number, reason?: string): Promise<void> {
    return request.post(`/api/v1/workflow/instances/${id}/terminate`, { reason });
}

// 挂起工作流实例
export async function suspendInstance(id: number, reason?: string): Promise<void> {
    return request.post(`/api/v1/workflow/instances/${id}/suspend`, { reason });
}

// 激活工作流实例
export async function activateInstance(id: number): Promise<void> {
    return request.post(`/api/v1/workflow/instances/${id}/activate`);
}

// 删除工作流实例
export async function deleteInstance(id: number): Promise<void> {
    return request.delete(`/api/v1/workflow/instances/${id}`);
}

// 获取工作流实例的任务列表
export async function getInstanceTasks(instanceId: number): Promise<TaskInstance[]> {
    return request.get(`/api/v1/workflow/instances/${instanceId}/tasks`);
}

// 获取任务列表
export async function getTasks(params: TaskQuery): Promise<Page<TaskInstance>> {
    return request.get('/api/v1/workflow/tasks/page', { params });
}

// 完成任务
export async function completeTask(taskId: number, variables?: Record<string, any>): Promise<void> {
    return request.post(`/api/v1/workflow/tasks/${taskId}/complete`, { variables });
}

// 委派任务
export async function delegateTask(taskId: number, assignee: string): Promise<void> {
    return request.post(`/api/v1/workflow/tasks/${taskId}/delegate`, { assignee });
}

// 认领任务
export async function claimTask(taskId: number): Promise<void> {
    return request.post(`/api/v1/workflow/tasks/${taskId}/claim`);
}

// 获取实例统计信息
export async function getInstanceStatistics(): Promise<InstanceStatistics> {
    return request.get('/api/v1/workflow/instances/statistics');
}

// 获取实例执行历史
export async function getInstanceHistory(instanceId: number): Promise<any[]> {
    return request.get(`/api/v1/workflow/instances/${instanceId}/history`);
}

// 获取实例流程图
export async function getInstanceDiagram(instanceId: number): Promise<string> {
    return request.get(`/api/v1/workflow/instances/${instanceId}/diagram`, {
        responseType: 'text'
    });
}