import {
  Project,
  ProjectWorkflow,
  WorkflowDefinition,
  DocumentLineage,
  CreateProjectInput,
  ActivateWorkflowInput,
  ActivateWorkflowResult,
} from '../types/projectWorkflow';
import { getBearerAuthHeaders } from './authHeaders';

const API_BASE = '';

export async function fetchProjects(): Promise<Project[]> {
  const res = await fetch(`${API_BASE}/api/v1/projects`, {
    headers: getBearerAuthHeaders(),
  });
  if (!res.ok) {
    throw new Error(`获取项目列表失败: ${res.status}`);
  }
  const data = await res.json();
  return Array.isArray(data) ? data : [];
}

export async function createProject(data: CreateProjectInput): Promise<Project> {
  const res = await fetch(`${API_BASE}/api/v1/projects`, {
    method: 'POST',
    headers: getBearerAuthHeaders('application/json'),
    body: JSON.stringify(data),
  });
  if (!res.ok) {
    const text = await res.text();
    throw new Error(text || `创建项目失败: ${res.status}`);
  }
  return res.json();
}

export async function getProject(id: number): Promise<Project> {
  const res = await fetch(`${API_BASE}/api/v1/projects/${id}`, {
    headers: getBearerAuthHeaders(),
  });
  if (!res.ok) {
    throw new Error(`获取项目详情失败: ${res.status}`);
  }
  return res.json();
}

export async function fetchProjectWorkflows(projectId: number): Promise<ProjectWorkflow[]> {
  const res = await fetch(`${API_BASE}/api/v1/projects/${projectId}/workflows`, {
    headers: getBearerAuthHeaders(),
  });
  if (!res.ok) {
    throw new Error(`获取项目工作流清单失败: ${res.status}`);
  }
  return res.json();
}

export async function activateWorkflow(
  projectId: number,
  input: ActivateWorkflowInput
): Promise<ActivateWorkflowResult> {
  const res = await fetch(`${API_BASE}/api/v1/projects/${projectId}/active-workflow`, {
    method: 'PUT',
    headers: getBearerAuthHeaders('application/json'),
    body: JSON.stringify(input),
  });
  if (!res.ok) {
    const text = await res.text();
    let msg = text;
    try {
      const parsed = JSON.parse(text);
      if (parsed.message) msg = parsed.message;
    } catch {
      // ignore
    }
    throw new Error(msg || `切换激活工作流失败: ${res.status}`);
  }
  return res.json();
}

export async function fetchWorkflowCatalog(): Promise<WorkflowDefinition[]> {
  const res = await fetch(`${API_BASE}/api/v1/workflows`, {
    headers: getBearerAuthHeaders(),
  });
  if (!res.ok) {
    throw new Error(`获取工作流规范目录失败: ${res.status}`);
  }
  return res.json();
}

export async function fetchProjectLineage(
  projectId: number,
  docId?: string
): Promise<DocumentLineage[]> {
  const url = docId
    ? `${API_BASE}/api/v1/projects/${projectId}/lineage?doc_id=${encodeURIComponent(docId)}`
    : `${API_BASE}/api/v1/projects/${projectId}/lineage`;
  const res = await fetch(url, {
    headers: getBearerAuthHeaders(),
  });
  if (!res.ok) {
    throw new Error(`获取文档血缘失败: ${res.status}`);
  }
  return res.json();
}

export async function runProjectWorkflow(
  projectId: number,
  workflowKey: string,
  payload: Record<string, unknown>
): Promise<unknown> {
  const res = await fetch(`${API_BASE}/api/v1/projects/${projectId}/workflows/${workflowKey}/run`, {
    method: 'POST',
    headers: getBearerAuthHeaders('application/json'),
    body: JSON.stringify(payload),
  });
  if (!res.ok) {
    const text = await res.text();
    let msg = text;
    try {
      const parsed = JSON.parse(text);
      if (parsed.message) msg = parsed.message;
      else if (parsed.error_reason) msg = parsed.error_reason;
    } catch {
      // ignore
    }
    throw new Error(msg || `启动工作流运行失败: ${res.status}`);
  }
  return res.json();
}