//! The posts that tell an approver who asked for a redirected approval and what, and the line left
//! in the asking thread (M4b spec, section 6, after the review). Do not edit.

use gatewayd::approvals::text::{
    Asked, PROMPT_SHOWN, asked_post, sent_to_approver, unfollowed_post,
};

/// The escape for one code point, built here so this file holds no such character itself.
fn esc(code: u32) -> String {
    format!("{}u{code:04x}", char::from(92))
}

fn asked(prompt: &str, channel_type: &str) -> Asked {
    Asked {
        by: "@alex".to_string(),
        channel_type: channel_type.to_string(),
        prompt: prompt.to_string(),
    }
}

#[test]
fn who_where_and_what_they_asked() {
    assert_eq!(
        asked_post(
            3,
            &asked("Read the file /srv/notes/q3.txt and summarise it.", "D")
        ),
        "**Approval 3** was asked by @alex in a direct message with the bot. Their message:\n```\nRead the file /srv/notes/q3.txt and summarise it.\n```"
    );
    let group = asked_post(4, &asked("first\n\nsecond", "G"));
    assert_eq!(
        group,
        "**Approval 4** was asked by @alex in a group message with the bot. Their message:\n```\nfirst\n\nsecond\n```",
        "a burst keeps its lines"
    );
}

#[test]
fn the_message_is_escaped_and_fenced() {
    let hostile = format!(
        "see ``` and @channel{}{}",
        char::from_u32(0x202e).unwrap(),
        char::from(7)
    );
    let post = asked_post(5, &asked(&hostile, "D"));
    assert!(
        post.contains(&format!(
            "\n````\nsee ``` and @channel{}{}\n````",
            esc(0x202e),
            esc(7)
        )),
        "{post}"
    );
    assert!(!post.contains(char::from_u32(0x202e).unwrap()) && !post.contains(char::from(7)));
}

#[test]
fn a_long_message_is_cut_and_says_how_much() {
    let long = "é".repeat(PROMPT_SHOWN + 25);
    let post = asked_post(6, &asked(&long, "D"));
    assert!(
        post.ends_with(&format!(
            "\n```\n{}\n```\n(… 25 more characters)",
            "é".repeat(PROMPT_SHOWN)
        )),
        "{}",
        &post[post.len() - 80..]
    );
    let exact = asked_post(6, &asked(&"x".repeat(PROMPT_SHOWN), "D"));
    assert!(
        !exact.contains("more characters"),
        "nothing cut, nothing said"
    );
}

#[test]
fn an_unfollowed_session_and_the_note() {
    assert_eq!(
        unfollowed_post(9, "chat-1789700000-1"),
        "**Approval 9** was asked in session `chat-1789700000-1`, which gatewayd does not follow now (a restart, or a session from outside Mattermost)."
    );
    assert_eq!(
        sent_to_approver(3),
        "waiting for approval 3: it was sent to an approver"
    );
}