//! Process-name matching for optional game-specific profile activation.
//!
//! Matching is explicit and opt-in: a profile supplies executable names, and
//! only exact case-insensitive file-name matches activate it.

use std::collections::HashSet;

use sysinfo::System;

use crate::profile_schema::Profile;

pub fn running_executables() -> HashSet<String> {
    let system = System::new_all();
    system
        .processes()
        .values()
        .filter_map(|process| process.name().to_str())
        .map(|name| name.to_ascii_lowercase())
        .collect()
}

pub fn matching_profile_id(profiles: &[Profile]) -> Option<String> {
    let running = running_executables();
    profiles
        .iter()
        .filter(|profile| !profile.assigned_executables.is_empty())
        .find(|profile| {
            profile
                .assigned_executables
                .iter()
                .any(|name| running.contains(&name.to_ascii_lowercase()))
        })
        .map(|profile| profile.id.clone())
}

#[cfg(test)]
mod tests {
    use crate::default_profiles::{default_profile, fps_profile};

    #[test]
    fn no_profiles_without_assignments_match() {
        let profiles = vec![default_profile(), fps_profile()];
        assert!(profiles.iter().all(|p| p.assigned_executables.is_empty()));
    }
}