i-self 0.4.3

#![allow(dead_code)]

use anyhow::Result;
use reqwest::Client;
use serde::Serialize;

#[derive(Serialize)]
struct WhatsAppMessage {
    messaging_product: String,
    to: String,
    type_: String,
    text: WhatsAppText,
}

#[derive(Serialize)]
struct WhatsAppText {
    body: String,
}

pub async fn send_message(api_key: &str, from_phone: &str, to_phone: &str, text: &str) -> Result<()> {
    let client = Client::new();
    let url = format!("https://graph.facebook.com/v18.0/{}/messages", from_phone);
    
    let message = WhatsAppMessage {
        messaging_product: "whatsapp".to_string(),
        to: to_phone.to_string(),
        type_: "text".to_string(),
        text: WhatsAppText {
            body: text.to_string(),
        },
    };

    let response = client.post(&url)
        .header("Authorization", format!("Bearer {}", api_key))
        .header("Content-Type", "application/json")
        .json(&message)
        .send()
        .await?;

    if response.status().is_success() {
        Ok(())
    } else {
        let status = response.status();
        Err(anyhow::anyhow!("Failed to send WhatsApp message: {}", status))
    }
}