//! `gatewayd.toml` (M4a spec, section 3). Do not edit.

#[path = "support/tmp.rs"]
mod tmp;

use std::path::PathBuf;

use gatewayd::config::{Config, ConfigError, SecretSource, ServerUrl, parse_url, valid_id};
use tmp::TempDir;

const OWNER: &str = "abcdefghijklmnopqrstuvwxyz";
const CHANNEL: &str = "0123456789abcdefghijklmnop";

fn minimal() -> String {
    format!(
        "[mattermost]\nurl = \"https://straylight.scylla-hammerhead.ts.net\"\n\
         [secrets.mattermost_token]\ncredential = \"mattermost-token\"\n\
         [allow]\nusers = [\"{OWNER}\"]\n"
    )
}

fn load(text: &str) -> Result<Config, ConfigError> {
    let dir = TempDir::new("cfg");
    let path = dir.write("gatewayd.toml", text);
    Config::load(&path)
}

fn invalid(text: &str) -> String {
    match load(text) {
        Err(ConfigError::Invalid(_, why)) => why,
        other => panic!("expected Invalid for {text:?}, got {other:?}"),
    }
}

#[test]
fn a_minimal_config_gets_every_default() {
    let c = load(&minimal()).unwrap();
    assert_eq!(
        c.server().unwrap(),
        ServerUrl {
            tls: true,
            host: "straylight.scylla-hammerhead.ts.net".to_string(),
            port: 443
        }
    );
    assert_eq!(c.mattermost.ca_file, None);
    assert_eq!(
        c.token_source().unwrap(),
        SecretSource::Credential("mattermost-token".to_string())
    );
    assert_eq!(c.allow.users, vec![OWNER.to_string()]);
    assert!(c.allow.channels.is_empty());
    assert_eq!((c.limits.queue, c.limits.typing_every_ms), (20, 3_000));
    assert_eq!(
        (c.limits.ping_every_ms, c.limits.dead_after_ms),
        (30_000, 60_000)
    );
    let home = std::env::var_os("BOXMAKER_HOME")
        .map(PathBuf::from)
        .unwrap_or_else(|| PathBuf::from("/var/lib/boxmaker"));
    assert_eq!(c.loop_socket(), home.join("run/loop/loop.sock"));
    assert_eq!(c.state_path(), home.join("gateway/state.json"));
}

#[test]
fn every_value_can_be_set() {
    let text = format!(
        "[mattermost]\nurl = \"http://127.0.0.1:8065\"\nca_file = \"/etc/boxmaker/ca.pem\"\n\
         [secrets.mattermost_token]\nfile = \"/home/k/.config/boxmaker/token\"\n\
         [allow]\nusers = [\"{OWNER}\"]\nchannels = [\"{CHANNEL}\"]\n\
         [loop]\nsocket = \"/run/l.sock\"\n[paths]\nhome = \"/h\"\n\
         [limits]\nqueue = 5\ntyping_every_ms = 1\nping_every_ms = 2\ndead_after_ms = 3\n"
    );
    let c = load(&text).unwrap();
    assert_eq!(
        c.server().unwrap(),
        ServerUrl {
            tls: false,
            host: "127.0.0.1".to_string(),
            port: 8065
        }
    );
    assert_eq!(
        c.mattermost.ca_file,
        Some(PathBuf::from("/etc/boxmaker/ca.pem"))
    );
    assert_eq!(
        c.token_source().unwrap(),
        SecretSource::File(PathBuf::from("/home/k/.config/boxmaker/token"))
    );
    assert_eq!(c.allow.channels, vec![CHANNEL.to_string()]);
    assert_eq!(c.loop_socket(), PathBuf::from("/run/l.sock"));
    assert_eq!(c.state_path(), PathBuf::from("/h/gateway/state.json"));
    assert_eq!(
        (
            c.limits.queue,
            c.limits.typing_every_ms,
            c.limits.ping_every_ms,
            c.limits.dead_after_ms
        ),
        (5, 1, 2, 3)
    );
}

#[test]
fn an_env_secret() {
    let text = minimal().replace(
        "credential = \"mattermost-token\"",
        "env = \"BOXMAKER_MM_TOKEN\"",
    );
    assert_eq!(
        load(&text).unwrap().token_source().unwrap(),
        SecretSource::Env("BOXMAKER_MM_TOKEN".to_string())
    );
}

#[test]
fn urls() {
    for (url, tls, host, port) in [
        ("https://a.example", true, "a.example", 443),
        ("https://a.example:8443", true, "a.example", 8443),
        ("http://localhost", false, "localhost", 80),
        ("http://127.0.0.1:8065", false, "127.0.0.1", 8065),
    ] {
        assert_eq!(
            parse_url(url),
            Ok(ServerUrl {
                tls,
                host: host.to_string(),
                port
            }),
            "{url}"
        );
    }
    for url in [
        "",
        "a.example",
        "ftp://a.example",
        "https://",
        "https://a.example/",
        "https://a.example/api",
        "https://A.example",
        "https://a.example:0",
        "https://a.example:65536",
        "https://a.example:0443",
        "https://a.example:",
        "https://user@a.example",
        "https://a.example?x",
        "https://.a.example",
        "https://a.example.",
        "https://[::1]:443",
        "https:// a.example",
    ] {
        assert!(parse_url(url).is_err(), "{url:?} must be refused");
    }
}

#[test]
fn ids() {
    assert!(valid_id(OWNER));
    assert!(valid_id(CHANNEL));
    for id in [
        "",
        "abc",
        "abcdefghijklmnopqrstuvwxyZ",
        "abcdefghijklmnopqrstuvwxy-",
        "abcdefghijklmnopqrstuvwxyza",
    ] {
        assert!(!valid_id(id), "{id:?}");
    }
}

#[test]
fn bad_values_are_named() {
    let token = "credential = \"mattermost-token\"";
    let cases: Vec<(String, &str)> = vec![
        (
            minimal().replace(
                "https://straylight.scylla-hammerhead.ts.net",
                "https://x.example/path",
            ),
            "url",
        ),
        (
            minimal()
                .replace(
                    "[secrets.mattermost_token]",
                    "[mattermost2]\n[secrets.other]",
                )
                .replace("[mattermost2]\n", ""),
            "mattermost_token",
        ),
        (
            minimal().replace(token, "credential = \"a b\""),
            "credential",
        ),
        (minimal().replace(token, "env = \"lower\""), "env"),
        (
            minimal().replace(token, "file = \"relative/token\""),
            "absolute",
        ),
        (
            minimal().replace(token, "credential = \"x\"\nenv = \"Y\""),
            "exactly one",
        ),
        (minimal().replace(token, ""), "exactly one"),
        (
            minimal().replace(&format!("[\"{OWNER}\"]"), "[]"),
            "users is empty",
        ),
        (minimal().replace(OWNER, "tooshort"), "not a Mattermost id"),
        (
            format!("{}channels = [\"NOTANID\"]\n", minimal()),
            "not a Mattermost id",
        ),
        (
            minimal().replace("[mattermost]\n", "[mattermost]\nca_file = \"ca.pem\"\n"),
            "ca_file",
        ),
        (format!("{}[limits]\nqueue = 0\n", minimal()), "queue"),
        (
            format!("{}[limits]\ndead_after_ms = 0\n", minimal()),
            "dead_after_ms",
        ),
    ];
    for (text, word) in cases {
        let why = invalid(&text);
        assert!(why.contains(word), "{word}: {why}");
    }
}

#[test]
fn unknown_keys_and_missing_tables_are_parse_errors() {
    for text in [
        format!("{}[allow2]\n", minimal()),
        minimal().replace("[mattermost]\n", "[mattermost]\nproxy = \"x\"\n"),
        minimal().replace(
            "credential = \"mattermost-token\"",
            "credential = \"t\"\nkeyring = \"x\"",
        ),
        minimal().replace(&format!("[allow]\nusers = [\"{OWNER}\"]\n"), ""),
        format!("{}[limits]\nqueue = -1\n", minimal()),
    ] {
        assert!(matches!(load(&text), Err(ConfigError::Parse(..))), "{text}");
    }
}