/**
 * API client for integration tests.
 * Used for direct backend calls: DB verification, test reset, data assertions.
 */
const API_URL = process.env.API_URL || "http://localhost:8080"

export class ApiClient {
  private token: string | null = null

  async login(email: string, password: string): Promise<void> {
    const res = await fetch(`${API_URL}/api/v1/auth/login`, {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ email, password }),
    })
    if (!res.ok) throw new Error(`Login failed: ${res.status}`)
    const data = await res.json()
    this.token = data.token
  }

  async resetDb(): Promise<void> {
    const res = await fetch(`${API_URL}/api/v1/test/reset-db`, {
      method: "POST",
      headers: this.authHeaders(),
    })
    if (!res.ok) throw new Error(`DB reset failed: ${res.status}`)
  }

  async getMembers(): Promise<any> {
    return this.get("/api/v1/members")
  }

  async getDocuments(): Promise<any> {
    return this.get("/api/v1/documents")
  }

  async getBatches(): Promise<any> {
    return this.get("/api/v1/batches")
  }

  async getDistributions(): Promise<any> {
    return this.get("/api/v1/distributions")
  }

  async getBoardPositions(): Promise<any> {
    return this.get("/api/v1/board")
  }

  private authHeaders(): Record<string, string> {
    const headers: Record<string, string> = {
      "Content-Type": "application/json",
    }
    if (this.token) headers["Authorization"] = `Bearer ${this.token}`
    return headers
  }

  private async get(path: string): Promise<any> {
    const res = await fetch(`${API_URL}${path}`, {
      headers: this.authHeaders(),
    })
    if (!res.ok) throw new Error(`GET ${path} failed: ${res.status}`)
    return res.json()
  }

  private async post(path: string, body?: unknown): Promise<any> {
    const res = await fetch(`${API_URL}${path}`, {
      method: "POST",
      headers: this.authHeaders(),
      body: body ? JSON.stringify(body) : undefined,
    })
    if (!res.ok) throw new Error(`POST ${path} failed: ${res.status}`)
    return res.json()
  }
}