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use crate::entities::{ProtocolParameters, ProtocolVersion, StakeDistributionParty};

use chrono::{DateTime, Duration, Utc};
use serde::{Deserialize, Serialize};

/// CertificateMetadata represents the metadata associated to a Certificate
#[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
pub struct CertificateMetadataMessagePart {
    /// Cardano network
    /// part of METADATA(p,n)
    pub network: String,

    /// Protocol Version (semver)
    /// Useful to achieve backward compatibility of the certificates (including of the multi signature)
    /// part of METADATA(p,n)
    #[serde(rename = "version")]
    pub protocol_version: ProtocolVersion,

    /// Protocol parameters
    /// part of METADATA(p,n)
    #[serde(rename = "parameters")]
    pub protocol_parameters: ProtocolParameters,

    /// Date and time when the certificate was initiated
    /// Represents the time at which the single signatures registration is opened
    /// part of METADATA(p,n)
    pub initiated_at: DateTime<Utc>,

    /// Date and time when the certificate was sealed
    /// Represents the time at which the quorum of single signatures was reached so that they were aggregated into a multi signature
    /// part of METADATA(p,n)
    pub sealed_at: DateTime<Utc>,

    /// The list of the active signers with their stakes and verification keys
    /// part of METADATA(p,n)
    pub signers: Vec<StakeDistributionParty>,
}

impl CertificateMetadataMessagePart {
    /// CertificateMetadata factory
    pub fn dummy() -> Self {
        let initiated_at = DateTime::parse_from_rfc3339("2024-02-12T13:11:47Z")
            .unwrap()
            .with_timezone(&Utc);

        Self {
            network: "testnet".to_string(),
            protocol_version: "0.1.0".to_string(),
            protocol_parameters: ProtocolParameters::new(1000, 100, 0.123),
            initiated_at,
            sealed_at: initiated_at + Duration::try_seconds(100).unwrap(),
            signers: vec![
                StakeDistributionParty {
                    party_id: "1".to_string(),
                    stake: 10,
                },
                StakeDistributionParty {
                    party_id: "2".to_string(),
                    stake: 20,
                },
            ],
        }
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    fn golden_message() -> CertificateMetadataMessagePart {
        CertificateMetadataMessagePart {
            network: "testnet".to_string(),
            protocol_version: "0.1.0".to_string(),
            protocol_parameters: ProtocolParameters::new(1000, 100, 0.123),
            initiated_at: DateTime::parse_from_rfc3339("2024-02-12T13:11:47Z")
                .unwrap()
                .with_timezone(&Utc),
            sealed_at: DateTime::parse_from_rfc3339("2024-02-12T13:12:57Z")
                .unwrap()
                .with_timezone(&Utc),
            signers: vec![
                StakeDistributionParty {
                    party_id: "1".to_string(),
                    stake: 10,
                },
                StakeDistributionParty {
                    party_id: "2".to_string(),
                    stake: 20,
                },
            ],
        }
    }

    // Test the backward compatibility with possible future upgrades.
    #[test]
    fn test_v1() {
        let json = r#"{
            "network": "testnet",
            "version": "0.1.0",
            "parameters": {
                "k": 1000,
                "m": 100,
                "phi_f": 0.123
            },
            "initiated_at": "2024-02-12T13:11:47Z",
            "sealed_at": "2024-02-12T13:12:57Z",
            "signers": [
                {
                    "party_id": "1",
                    "verification_key": "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",
                    "stake": 10
                },
                {
                    "party_id": "2",
                    "verification_key": "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",
                    "stake": 20
                }
            ]
        }"#;
        let message: CertificateMetadataMessagePart = serde_json::from_str(json).expect(
            "This JSON is expected to be successfully parsed into a CertificateMetadataMessagePart instance.",
        );

        assert_eq!(golden_message(), message);
    }

    // Test the backward compatibility with possible future upgrades.
    #[test]
    fn test_v2() {
        let json = r#"{
            "network": "testnet",
            "version": "0.1.0",
            "parameters": {
                "k": 1000,
                "m": 100,
                "phi_f": 0.123
            },
            "initiated_at": "2024-02-12T13:11:47Z",
            "sealed_at": "2024-02-12T13:12:57Z",
            "signers": [
                {
                    "party_id": "1",
                    "stake": 10
                },
                {
                    "party_id": "2",
                    "stake": 20
                }
            ]
        }"#;
        let message: CertificateMetadataMessagePart = serde_json::from_str(json).expect(
            "This JSON is expected to be successfully parsed into a CertificateMetadataMessagePart instance.",
        );

        assert_eq!(golden_message(), message);
    }
}