//! `attach-issue <number> <file>` and `attach-comment <comment-id>
//! <file>` — upload a file as an attachment. Prints the browser
//! download URL.

use std::path::PathBuf;

use anyhow::{Result, bail};
use clap::Args as ClapArgs;
use serde_json::Value;

use crate::client::Client;

#[derive(ClapArgs)]
pub struct IssueArgs {
    /// Issue number.
    number: u64,
    /// File path to upload.
    file: PathBuf,
}

#[derive(ClapArgs)]
pub struct CommentArgs {
    /// Comment id.
    id: u64,
    /// File path to upload.
    file: PathBuf,
}

/// # Errors
///
/// Returns an error if the input file doesn't exist or can't be
/// read. Propagates any transport error from the Forgejo REST call
/// (network unreachable, 4xx/5xx response, token missing/invalid)
/// and any I/O error from writing the browser download URL to stdout.
pub fn run_issue(client: &Client, args: IssueArgs) -> Result<()> {
    if !args.file.is_file() {
        bail!(
            "hive-forge attach-issue: file not found: {}",
            args.file.display()
        );
    }
    let repo = client.repo();
    let resp = client.post_multipart_file(
        &format!("/repos/{repo}/issues/{}/assets", args.number),
        &args.file,
    )?;
    print_url(&resp);
    Ok(())
}

/// # Errors
///
/// Returns an error if the input file doesn't exist or can't be
/// read. Propagates any transport error from the Forgejo REST call
/// (network unreachable, 4xx/5xx response, token missing/invalid)
/// and any I/O error from writing the browser download URL to stdout.
pub fn run_comment(client: &Client, args: CommentArgs) -> Result<()> {
    if !args.file.is_file() {
        bail!(
            "hive-forge attach-comment: file not found: {}",
            args.file.display()
        );
    }
    let repo = client.repo();
    let resp = client.post_multipart_file(
        &format!("/repos/{repo}/issues/comments/{}/assets", args.id),
        &args.file,
    )?;
    print_url(&resp);
    Ok(())
}

fn print_url(v: &Value) {
    if let Some(url) = v.get("browser_download_url").and_then(Value::as_str) {
        println!("{url}");
    }
}