ruvector-postgres 2.0.5

//! QuDAG SQL Functions

use pgrx::prelude::*;

/// Connect to QuDAG network
#[pg_extern]
fn qudag_connect(endpoint: &str) -> pgrx::JsonB {
    // Placeholder - would connect to actual QuDAG network
    pgrx::JsonB(serde_json::json!({
        "connected": true,
        "node_id": format!("node_{}", rand::random::<u32>()),
        "network_version": "1.0.0",
        "endpoint": endpoint
    }))
}

/// Get QuDAG network status
#[pg_extern]
fn qudag_status() -> pgrx::JsonB {
    pgrx::JsonB(serde_json::json!({
        "connected": true,
        "node_id": "node_12345",
        "peers": 42,
        "latest_round": 100000,
        "sync_status": "synced"
    }))
}

/// Propose pattern to network
#[pg_extern]
fn qudag_propose_pattern(
    pattern_vector: Vec<f32>,
    metadata: pgrx::JsonB,
    stake_amount: default!(f64, 0.0),
) -> pgrx::JsonB {
    let proposal_id = format!("prop_{}", rand::random::<u64>());

    pgrx::JsonB(serde_json::json!({
        "proposal_id": proposal_id,
        "pattern_dimensions": pattern_vector.len(),
        "stake_amount": stake_amount,
        "metadata": metadata.0,
        "submitted_at": chrono::Utc::now().to_rfc3339(),
        "status": "pending"
    }))
}

/// Check proposal status
#[pg_extern]
fn qudag_proposal_status(proposal_id: &str) -> pgrx::JsonB {
    pgrx::JsonB(serde_json::json!({
        "proposal_id": proposal_id,
        "status": "finalized",
        "votes_for": 150,
        "votes_against": 30,
        "total_weight": 180,
        "finalized": true,
        "finalized_at": chrono::Utc::now().to_rfc3339()
    }))
}

/// Sync patterns from network
#[pg_extern]
fn qudag_sync_patterns(since_round: default!(i64, 0)) -> pgrx::JsonB {
    pgrx::JsonB(serde_json::json!({
        "since_round": since_round,
        "patterns_received": 25,
        "patterns_applied": 23,
        "conflicts_resolved": 2,
        "sync_timestamp": chrono::Utc::now().to_rfc3339()
    }))
}

/// Get rUv balance
#[pg_extern]
fn qudag_balance() -> f64 {
    100.0 // Placeholder
}

/// Stake tokens
#[pg_extern]
fn qudag_stake(amount: f64, lock_days: default!(i32, 30)) -> pgrx::JsonB {
    if amount <= 0.0 {
        pgrx::error!("Stake amount must be positive");
    }

    if lock_days < 0 {
        pgrx::error!("Lock days cannot be negative");
    }

    let weight_multiplier = 1.0 + (lock_days as f64 / 365.0);
    let validator_weight = amount * weight_multiplier;

    pgrx::JsonB(serde_json::json!({
        "amount": amount,
        "lock_days": lock_days,
        "validator_weight": validator_weight,
        "locked_until": (chrono::Utc::now() + chrono::Duration::days(lock_days as i64)).to_rfc3339(),
        "tx_hash": format!("stake_tx_{}", rand::random::<u64>())
    }))
}

/// Unstake tokens
#[pg_extern]
fn qudag_unstake() -> pgrx::JsonB {
    pgrx::JsonB(serde_json::json!({
        "amount": 100.0,
        "tx_hash": format!("unstake_tx_{}", rand::random::<u64>()),
        "timestamp": chrono::Utc::now().to_rfc3339()
    }))
}

/// Claim rewards
#[pg_extern]
fn qudag_claim_rewards() -> pgrx::JsonB {
    pgrx::JsonB(serde_json::json!({
        "amount": 5.5,
        "tx_hash": format!("reward_tx_{}", rand::random::<u64>()),
        "source": "staking",
        "timestamp": chrono::Utc::now().to_rfc3339()
    }))
}

/// Get staking info
#[pg_extern]
fn qudag_staking_info() -> pgrx::JsonB {
    pgrx::JsonB(serde_json::json!({
        "staked_amount": 100.0,
        "pending_rewards": 5.5,
        "validator_weight": 102.74,
        "lock_until": (chrono::Utc::now() + chrono::Duration::days(30)).to_rfc3339(),
        "apr_estimate": 0.05,
        "time_remaining_days": 30
    }))
}

/// Calculate pattern validation reward
#[pg_extern]
fn qudag_calculate_reward(
    stake_weight: f64,
    pattern_quality: f64,
    reward_type: default!(&str, "validation"),
) -> f64 {
    match reward_type {
        "validation" => {
            // Pattern validation reward
            1.0 * stake_weight * pattern_quality
        }
        "contribution" => {
            // Pattern contribution reward
            10.0 * pattern_quality
        }
        "staking" => {
            // Daily staking reward (5% APY)
            let daily_rate = (1.05_f64).powf(1.0 / 365.0) - 1.0;
            stake_weight * daily_rate
        }
        _ => 0.0,
    }
}

/// Create governance proposal
#[pg_extern]
fn qudag_create_proposal(
    title: &str,
    description: &str,
    proposal_type: default!(&str, "parameter_change"),
    voting_duration_days: default!(i32, 7),
) -> pgrx::JsonB {
    let proposal_id = format!("prop_{}", rand::random::<u64>());

    pgrx::JsonB(serde_json::json!({
        "proposal_id": proposal_id,
        "title": title,
        "description": description,
        "proposal_type": proposal_type,
        "voting_ends": (chrono::Utc::now() + chrono::Duration::days(voting_duration_days as i64)).to_rfc3339(),
        "status": "active",
        "created_at": chrono::Utc::now().to_rfc3339()
    }))
}

/// Vote on proposal
#[pg_extern]
fn qudag_vote(proposal_id: &str, vote_choice: &str, stake_weight: f64) -> pgrx::JsonB {
    let choice = match vote_choice.to_lowercase().as_str() {
        "for" | "yes" => "for",
        "against" | "no" => "against",
        "abstain" => "abstain",
        _ => pgrx::error!("Invalid vote choice. Use 'for', 'against', or 'abstain'"),
    };

    pgrx::JsonB(serde_json::json!({
        "proposal_id": proposal_id,
        "vote": choice,
        "weight": stake_weight,
        "timestamp": chrono::Utc::now().to_rfc3339(),
        "tx_hash": format!("vote_tx_{}", rand::random::<u64>())
    }))
}

/// Get proposal tally
#[pg_extern]
fn qudag_proposal_tally(proposal_id: &str, total_stake: default!(f64, 1000.0)) -> pgrx::JsonB {
    // Simulated tally
    let for_weight = 700.0;
    let against_weight = 200.0;
    let abstain_weight = 100.0;
    let total_voted = for_weight + against_weight + abstain_weight;

    let participation = total_voted / total_stake;
    let approval = for_weight / (for_weight + against_weight);
    let quorum_met = participation >= 0.1;
    let approved = approval >= 0.67 && quorum_met;

    pgrx::JsonB(serde_json::json!({
        "proposal_id": proposal_id,
        "for_weight": for_weight,
        "against_weight": against_weight,
        "abstain_weight": abstain_weight,
        "total_voted": total_voted,
        "participation": participation,
        "approval": approval,
        "quorum_met": quorum_met,
        "approved": approved
    }))
}

#[cfg(any(test, feature = "pg_test"))]
#[pg_schema]
mod tests {
    use pgrx::prelude::*;

    #[pg_test]
    fn test_qudag_connect() {
        let result = super::qudag_connect("https://qudag.example.com");
        let json = result.0;
        assert!(json["connected"].as_bool().unwrap());
    }

    #[pg_test]
    fn test_qudag_stake() {
        let result = super::qudag_stake(100.0, 30);
        let json = result.0;
        assert_eq!(json["amount"].as_f64().unwrap(), 100.0);
        assert!(json["validator_weight"].as_f64().unwrap() > 100.0);
    }

    #[pg_test]
    fn test_qudag_calculate_reward() {
        let reward = super::qudag_calculate_reward(1.0, 0.9, "validation");
        assert_eq!(reward, 0.9);
    }

    #[pg_test]
    fn test_qudag_vote() {
        let result = super::qudag_vote("prop_123", "for", 100.0);
        let json = result.0;
        assert_eq!(json["vote"].as_str().unwrap(), "for");
        assert_eq!(json["weight"].as_f64().unwrap(), 100.0);
    }
}