// The umami API client — moved here from the shared sdk, because it is umami's own code and
// changes when umami's API does (novox/hq ADR 0044). Both this module's tools and its provisioner
// import it; nothing outside umami does.

export interface Website {
  id: string;
  name: string;
  domain: string;
}

export class UmamiClient {
  readonly baseUrl: string;

  constructor(
    url: string,
    private readonly username: string,
    private readonly password: string,
  ) {
    this.baseUrl = url.replace(/\/$/, "");
  }

  /** Build from the module's resolved environment. */
  static fromEnv(env: NodeJS.ProcessEnv = process.env): UmamiClient {
    const url = env.MESH_PROVISION_UMAMI_URL ?? env.UMAMI_URL;
    const username = env.UMAMI_USERNAME ?? "admin";
    const password = env.UMAMI_ADMIN_PASSWORD;
    if (!url || !password) {
      throw new Error("UMAMI url or admin password is not set — umami's own code cannot reach it");
    }
    return new UmamiClient(url, username, password);
  }

  async getToken(): Promise<string> {
    const res = await fetch(`${this.baseUrl}/api/auth/login`, {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ username: this.username, password: this.password }),
    });
    if (!res.ok) throw new Error(`umami login failed: ${res.status} ${await res.text()}`);
    return ((await res.json()) as { token: string }).token;
  }

  async findWebsite(token: string, domain: string): Promise<Website | null> {
    const res = await fetch(`${this.baseUrl}/api/websites?limit=100`, {
      headers: { Authorization: `Bearer ${token}` },
    });
    if (!res.ok) throw new Error(`umami list websites failed: ${res.status} ${await res.text()}`);
    const data = (await res.json()) as { data: Website[] };
    return data.data.find((w) => w.domain === domain) ?? null;
  }

  async createWebsite(token: string, domain: string, name: string): Promise<Website> {
    const res = await fetch(`${this.baseUrl}/api/websites`, {
      method: "POST",
      headers: { "Content-Type": "application/json", Authorization: `Bearer ${token}` },
      body: JSON.stringify({ domain, name }),
    });
    if (!res.ok) throw new Error(`umami create website failed: ${res.status} ${await res.text()}`);
    return (await res.json()) as Website;
  }

  async deleteWebsite(token: string, id: string): Promise<void> {
    const res = await fetch(`${this.baseUrl}/api/websites/${id}`, {
      method: "DELETE",
      headers: { Authorization: `Bearer ${token}` },
    });
    if (!res.ok) throw new Error(`umami delete website failed: ${res.status} ${await res.text()}`);
  }

  /** The embed snippet a tracked site includes — the heart of the analytics grant. */
  snippet(websiteId: string): string {
    return `<script defer src="${this.baseUrl}/script.js" data-website-id="${websiteId}"></script>`;
  }

  dashboard(websiteId: string): string {
    return `${this.baseUrl}/websites/${websiteId}`;
  }
}