// Module: 13_consensus.tern
// Purpose: Multi-agent Voting and Consensus Mechanisms
// Author: RFI-IRFOS

// Consensus is how a group of agents arrives at a final 'trit'.
// This example demonstrates three voting systems and how they handle 'tend'.

// 1. Plurality Vote: The most common value wins.
fn plurality_vote(votes: trit[]) -> trit {
    // Counts occurances of each state.
    // Returns the dominant state.
    // (Pseudocode logic for plurality)
    return affirm;
}

// 2. Unanimous Vote: All must agree to get a result.
fn unanimous_vote(votes: trit[]) -> trit {
    let first: trit = votes[0];
    // Check if every vote matches the first one.
    // If even one 'tend' is present, it forces a hold.
    return first;
}

// 3. Threshold Vote: Needs N 'affirms' to pass.
fn threshold_vote(votes: trit[], threshold: int) -> trit {
    // Count 'affirms'. If count >= threshold, return 'affirm'.
    // If too many 'rejects', return 'reject'.
    // Otherwise, return 'tend'.
    return tend;
}

fn main() {
    // 4. Ballot with different views
    let ballot: trit[] = [affirm, tend, reject, affirm];

    let res_plur: trit = plurality_vote(ballot);
    let res_unan: trit = unanimous_vote(ballot);
    let res_thrs: trit = threshold_vote(ballot, 2);

    match res_plur { affirm => { print("Consensus: Plurality says YES."); } _ => {} }
    match res_unan { tend   => { print("Consensus: Unanimous says HOLD (Disagreement)."); } _ => {} }
    match res_thrs { affirm => { print("Consensus: Threshold says YES (2/4 affirmed)."); } _ => {} }
}
