use std::{sync::LazyLock, time::Duration};

pub(crate) mod networking_metrics;
pub(crate) mod tokio_runtime_metrics;
pub(crate) mod tokio_task_metrics;

const MONITOR_SAMPLE_DURATION: Duration = Duration::from_secs(10);

pub static MPC_NUM_TRIPLES_GENERATED: LazyLock<prometheus::IntCounter> = LazyLock::new(|| {
    prometheus::register_int_counter!(
        "mpc_num_triples_generated",
        "Number of triples generated (including both owned and not owned)"
    )
    .unwrap()
});

pub static MPC_NUM_BAD_PEER_PRESIGN_REQUESTS: LazyLock<prometheus::IntCounterVec> =
    LazyLock::new(|| {
        prometheus::register_int_counter_vec!(
            "mpc_num_bad_peer_presign_requests",
            "Presignature requests from a peer whose participant-set size did not \
             match the domain's reconstruction threshold",
            &["domain_id"]
        )
        .unwrap()
    });

pub static MPC_TRIPLES_GENERATION_TIME_ELAPSED: LazyLock<prometheus::Histogram> =
    LazyLock::new(|| {
        prometheus::register_histogram!(
            "near_mpc_triples_generation_time_elapsed",
            "Time taken to generate a batch of triples",
            // Batch generation takes tens of seconds, up to the configured
            // timeout; the default buckets top out at 10s.
            vec![5.0, 10.0, 20.0, 30.0, 45.0, 60.0, 90.0, 120.0, 180.0, 240.0],
        )
        .unwrap()
    });

pub static MPC_PRE_SIGNATURE_TIME_ELAPSED: LazyLock<prometheus::Histogram> = LazyLock::new(|| {
    prometheus::register_histogram!(
        "near_mpc_pre_signature_time_elapsed",
        "Time taken to generate a pre signature",
    )
    .unwrap()
});

pub static MPC_SIGNATURE_TIME_ELAPSED: LazyLock<prometheus::Histogram> = LazyLock::new(|| {
    prometheus::register_histogram!(
        "near_mpc_signature_time_elapsed",
        "Time taken to generate a signature",
    )
    .unwrap()
});

pub static MPC_CKD_TIME_ELAPSED: LazyLock<prometheus::Histogram> = LazyLock::new(|| {
    prometheus::register_histogram!(
        "near_mpc_ckd_time_elapsed",
        "Time taken to generate a confidential key",
    )
    .unwrap()
});

pub static MPC_OWNED_NUM_TRIPLES_AVAILABLE: LazyLock<prometheus::IntGauge> = LazyLock::new(|| {
    prometheus::register_int_gauge!(
        "mpc_owned_num_triples_available",
        "Number of triples generated that we own, and not yet used"
    )
    .unwrap()
});

pub static MPC_OWNED_NUM_TRIPLES_ONLINE: LazyLock<prometheus::IntGauge> = LazyLock::new(|| {
    prometheus::register_int_gauge!(
        "mpc_owned_num_triples_online",
        "Number of triples generated that we own, and not yet used,
                for which the participant set is confirmed alive"
    )
    .unwrap()
});

pub static MPC_OWNED_NUM_TRIPLES_WITH_OFFLINE_PARTICIPANT: LazyLock<prometheus::IntGauge> =
    LazyLock::new(|| {
        prometheus::register_int_gauge!(
            "mpc_owned_num_triples_with_offline_participant",
            "Number of triples generated that we own, and not yet used,
                for which some participant is offline",
        )
        .unwrap()
    });

pub static MPC_OWNED_NUM_PRESIGNATURES_AVAILABLE: LazyLock<prometheus::IntGauge> =
    LazyLock::new(|| {
        prometheus::register_int_gauge!(
            "mpc_owned_num_presignatures_available",
            "Number of presignatures generated that we own, and not yet used"
        )
        .unwrap()
    });

pub static MPC_OWNED_NUM_PRESIGNATURES_ONLINE: LazyLock<prometheus::IntGauge> =
    LazyLock::new(|| {
        prometheus::register_int_gauge!(
            "mpc_owned_num_presignatures_online",
            "Number of presignatures generated that we own, and not yet used,
                for which the participant set is confirmed alive"
        )
        .unwrap()
    });

pub static MPC_OWNED_NUM_PRESIGNATURES_WITH_OFFLINE_PARTICIPANT: LazyLock<prometheus::IntGauge> =
    LazyLock::new(|| {
        prometheus::register_int_gauge!(
            "mpc_owned_num_presignatures_with_offline_participant",
            "Number of presignatures generated that we own, and not yet used,
                for which some participant is offline",
        )
        .unwrap()
    });

pub static MPC_INDEXER_NUM_RECEIPT_EXECUTION_OUTCOMES: LazyLock<prometheus::IntCounter> =
    LazyLock::new(|| {
        prometheus::register_int_counter!(
            "mpc_indexer_num_receipt_execution_outcomes",
            "Number of receipt execution outcomes processed by the near indexer"
        )
        .unwrap()
    });

pub static MPC_NUM_SIGN_REQUESTS_INDEXED: LazyLock<prometheus::IntCounter> = LazyLock::new(|| {
    prometheus::register_int_counter!(
        "mpc_num_signature_requests_indexed",
        "Number of signatures requests seen by the indexer"
    )
    .unwrap()
});

pub static MPC_NUM_CKD_REQUESTS_INDEXED: LazyLock<prometheus::IntCounter> = LazyLock::new(|| {
    prometheus::register_int_counter!(
        "mpc_num_ckd_requests_indexed",
        "Number of ckd requests seen by the indexer"
    )
    .unwrap()
});

pub static MPC_NUM_VERIFY_FOREIGN_TX_REQUESTS_INDEXED: LazyLock<prometheus::IntCounter> =
    LazyLock::new(|| {
        prometheus::register_int_counter!(
            "mpc_num_verify_foreign_tx_requests_indexed",
            "Number of verify foreign tx requests seen by the indexer"
        )
        .unwrap()
    });

pub static MPC_NUM_SIGN_RESPONSES_INDEXED: LazyLock<prometheus::IntCounter> = LazyLock::new(|| {
    prometheus::register_int_counter!(
        "mpc_num_signature_responses_indexed",
        "Number of signatures responses seen by the indexer"
    )
    .unwrap()
});

pub static MPC_NUM_CKD_RESPONSES_INDEXED: LazyLock<prometheus::IntCounter> = LazyLock::new(|| {
    prometheus::register_int_counter!(
        "mpc_num_ckd_responses_indexed",
        "Number of ckd responses seen by the indexer"
    )
    .unwrap()
});

pub static MPC_NUM_VERIFY_FOREIGN_TX_RESPONSES_INDEXED: LazyLock<prometheus::IntCounter> =
    LazyLock::new(|| {
        prometheus::register_int_counter!(
            "mpc_num_verify_foreign_tx_responses_indexed",
            "Number of verify foreign tx responses seen by the indexer"
        )
        .unwrap()
    });

pub static MPC_NUM_TIMEOUTS_INDEXED: LazyLock<prometheus::IntCounter> = LazyLock::new(|| {
    prometheus::register_int_counter!(
        "mpc_num_fail_on_timeout_indexed",
        "Number of calls to fail_on_timeout seen by the indexer."
    )
    .unwrap()
});

pub static MPC_NUM_SIGNATURE_COMPUTATIONS_LED: LazyLock<prometheus::IntCounterVec> = LazyLock::new(
    || {
        prometheus::register_int_counter_vec!(
            "mpc_num_signature_computations_led",
            "Number of finished signature computation attempts that this node led. Attempts interrupted before completion (e.g. node restart) are not counted.",
            &["result"],
        )
        .unwrap()
    },
);

pub static MPC_NUM_CKD_COMPUTATIONS_LED: LazyLock<prometheus::IntCounterVec> = LazyLock::new(
    || {
        prometheus::register_int_counter_vec!(
            "mpc_num_ckd_computations_led",
            "Number of finished ckd computation attempts that this node led. Attempts interrupted before completion (e.g. node restart) are not counted.",
            &["result"],
        )
        .unwrap()
    },
);

pub static MPC_NUM_VERIFY_FOREIGN_TX_COMPUTATIONS_LED: LazyLock<prometheus::IntCounterVec> =
    LazyLock::new(|| {
        prometheus::register_int_counter_vec!(
            "mpc_num_verify_foreign_tx_computations_led",
            "Number of finished verify foreign tx computation attempts that this node led. Attempts interrupted before completion (e.g. node restart) are not counted.",
            &["result"],
        )
        .unwrap()
    });

pub static MPC_NUM_PASSIVE_SIGN_REQUESTS_RECEIVED: LazyLock<prometheus::IntCounter> =
    LazyLock::new(|| {
        prometheus::register_int_counter!(
            "mpc_num_passive_signature_requests_received",
            "Number of passive signature requests received from mpc peers"
        )
        .unwrap()
    });

pub static MPC_NUM_PASSIVE_CKD_REQUESTS_RECEIVED: LazyLock<prometheus::IntCounter> =
    LazyLock::new(|| {
        prometheus::register_int_counter!(
            "mpc_num_passive_ckd_requests_received",
            "Number of passive ckd requests received from mpc peers"
        )
        .unwrap()
    });

pub static MPC_NUM_PASSIVE_SIGN_REQUESTS_LOOKUP_SUCCEEDED: LazyLock<prometheus::IntCounter> =
    LazyLock::new(|| {
        prometheus::register_int_counter!(
            "mpc_num_passive_signature_requests_lookup_succeeded",
            "Number of passive signature requests successfully looked up in local DB"
        )
        .unwrap()
    });

pub static MPC_NUM_PASSIVE_CKD_REQUESTS_LOOKUP_SUCCEEDED: LazyLock<prometheus::IntCounter> =
    LazyLock::new(|| {
        prometheus::register_int_counter!(
            "mpc_num_passive_ckd_requests_lookup_succeeded",
            "Number of passive ckd requests successfully looked up in local DB"
        )
        .unwrap()
    });

pub static MPC_OUTGOING_TRANSACTION_OUTCOMES: LazyLock<prometheus::IntCounterVec> =
    LazyLock::new(|| {
        prometheus::register_int_counter_vec!(
            "mpc_outgoing_transaction_outcomes",
            "Number of transactions sent by this node, by type and outcome",
            &["type", "outcome"],
        )
        .unwrap()
    });

pub static MPC_INDEXER_LATEST_BLOCK_HEIGHT: LazyLock<prometheus::IntGauge> = LazyLock::new(|| {
    prometheus::register_int_gauge!(
        "mpc_indexer_latest_block_height",
        "Latest block height processed by the near indexer"
    )
    .unwrap()
});

pub static MPC_INDEXER_LATEST_BLOCK_TIMESTAMP_SECONDS: LazyLock<prometheus::IntGauge> =
    LazyLock::new(|| {
        prometheus::register_int_gauge!(
            "mpc_indexer_latest_block_timestamp_seconds",
            "Unix time of the latest block processed by the near indexer"
        )
        .unwrap()
    });

pub static MPC_CURRENT_EPOCH_ID: LazyLock<prometheus::IntGauge> = LazyLock::new(|| {
    prometheus::register_int_gauge!(
        "mpc_current_epoch_id",
        "Epoch id of the keyset the contract currently holds, as last observed by this node"
    )
    .unwrap()
});

pub static MPC_LAST_BACKUP_SERVED_EPOCH: LazyLock<prometheus::IntGauge> = LazyLock::new(|| {
    prometheus::register_int_gauge!(
        "mpc_last_backup_served_epoch",
        "Epoch id of the most recent keyset successfully served to the registered backup service"
    )
    .unwrap()
});

pub static MPC_LAST_BACKUP_SERVED_TIMESTAMP_SECONDS: LazyLock<prometheus::IntGauge> =
    LazyLock::new(|| {
        prometheus::register_int_gauge!(
            "mpc_last_backup_served_timestamp_seconds",
            "Unix time at which keyshares were most recently served to the registered backup \
             service"
        )
        .unwrap()
    });

pub static MPC_OWN_IMAGE_HASH_ALLOWED: LazyLock<prometheus::IntGauge> = LazyLock::new(|| {
    prometheus::register_int_gauge!(
        "mpc_own_image_hash_allowed",
        "Whether the Docker image hash this node is running is in the contract's \
             allowlist (1) or not (0)"
    )
    .unwrap()
});

pub static MPC_OWN_IMAGE_HASH_IS_MOST_RECENT: LazyLock<prometheus::IntGauge> =
    LazyLock::new(|| {
        prometheus::register_int_gauge!(
            "mpc_own_image_hash_is_most_recent",
            "Whether the Docker image hash this node is running is the most recent \
             hash in the contract's allowlist (1) or not (0)"
        )
        .unwrap()
    });

pub static MPC_OWN_IMAGE_HASH_EXPIRY_TIMESTAMP_SECONDS: LazyLock<prometheus::IntGauge> =
    LazyLock::new(|| {
        prometheus::register_int_gauge!(
            "mpc_own_image_hash_expiry_timestamp_seconds",
            "Unix time at which the Docker image hash this node is running is evicted \
             from the contract's allowlist. -1 when the hash never expires (newest \
             entry) or the contract does not report expiry; 0 when the hash is already \
             evicted. Compare against mpc_indexer_latest_block_timestamp_seconds for \
             the remaining time"
        )
        .unwrap()
    });

pub static MPC_ACCESS_KEY_NONCE: LazyLock<prometheus::IntGauge> = LazyLock::new(|| {
    prometheus::register_int_gauge!(
        "mpc_access_key_nonce",
        "Latest observed nonce among transactions submitted using
             the node's access key for its near account",
    )
    .unwrap()
});

pub static MPC_CURRENT_JOB_STATE: LazyLock<prometheus::IntGaugeVec> = LazyLock::new(|| {
    prometheus::register_int_gauge_vec!(
        "mpc_current_job_state",
        "Current state of the top-level MPC job",
        &["state"],
    )
    .unwrap()
});

pub static SIGN_REQUEST_CHANNEL_FAILED: LazyLock<prometheus::IntCounter> = LazyLock::new(|| {
    prometheus::register_int_counter!(
        "sign_request_channel_failed",
        "failed to send on channel in sign_request_channel",
    )
    .unwrap()
});

pub static CKD_REQUEST_CHANNEL_FAILED: LazyLock<prometheus::IntCounter> = LazyLock::new(|| {
    prometheus::register_int_counter!(
        "ckd_request_channel_failed",
        "failed to send on channel in ckd_request_channel",
    )
    .unwrap()
});

pub static VERIFY_FOREIGN_TX_REQUEST_CHANNEL_FAILED: LazyLock<prometheus::IntCounter> =
    LazyLock::new(|| {
        prometheus::register_int_counter!(
            "verify_foreign_tx_request_channel_failed",
            "failed to send on channel in verify_foreign_tx_request_channel",
        )
        .unwrap()
    });

pub static VERIFY_TEE_REQUESTS_SENT: LazyLock<prometheus::IntCounter> = LazyLock::new(|| {
    prometheus::register_int_counter!(
        "verify_tee_requests_sent",
        "failed to send on channel in sign_request_channel",
    )
    .unwrap()
});

pub static PEERS_INDEXER_HEIGHTS: LazyLock<prometheus::IntGaugeVec> = LazyLock::new(|| {
    prometheus::register_int_gauge_vec!(
        "mpc_peers_indexer_block_heights",
        "Latest known block height of peers",
        &["participant"]
    )
    .unwrap()
});

pub static MPC_BUILD_INFO: LazyLock<prometheus::IntGaugeVec> = LazyLock::new(|| {
    prometheus::register_int_gauge_vec!(
        "mpc_node_build_info",
        "Metric whose labels indicate node’s version",
        &["release", "build_time", "commit", "rustc_version"],
    )
    .unwrap()
});

/// Initialize the build info metric with current version information
pub fn init_build_info_metric() {
    // Use compile-time constants from built crate
    let version = crate::built_info::PKG_VERSION;
    let build_time = crate::built_info::BUILT_TIME_UTC;
    let commit = crate::built_info::GIT_COMMIT_HASH_SHORT.unwrap_or("unknown");
    let rustc_version = crate::built_info::RUSTC_VERSION;

    MPC_BUILD_INFO
        .with_label_values(&[version, build_time, commit, rustc_version])
        .set(1);
}

pub static PARTICIPANT_TOTAL_TIMES_SEEN_IN_FAILED_SIGNATURE_COMPUTATION_LEADER: LazyLock<
    prometheus::IntCounterVec,
> = LazyLock::new(|| {
    prometheus::register_int_counter_vec!(
        "participant_total_times_seen_in_failed_signature_computation_leader",
        "Number of times each participant id was seen in a failed signature computation that was led by us",
        &["participant_id"],
    )
    .unwrap()
});

pub static PARTICIPANT_TOTAL_TIMES_SEEN_IN_FAILED_SIGNATURE_COMPUTATION_FOLLOWER: LazyLock<
    prometheus::IntCounterVec,
> = LazyLock::new(|| {
    prometheus::register_int_counter_vec!(
            "participant_total_times_seen_in_failed_signature_computation_follower",
            "Number of times each participant id was seen in a failed signature computation that was followed by us",
            &["participant_id"],
        )
        .unwrap()
});

pub const MPC_NUM_COMPUTATIONS_LED_TOTAL_LABEL: &str = "total";
pub const MPC_NUM_COMPUTATIONS_LED_SUCCEEDED_LABEL: &str = "succeeded";
pub const MPC_NUM_COMPUTATIONS_LED_FAILED_LABEL: &str = "failed";
pub const MPC_NUM_COMPUTATIONS_LED_DEADLINE_EXCEEDED_LABEL: &str = "deadline_exceeded";

pub static MPC_TEE_ATTESTATION_ATTEMPTS_TOTAL: LazyLock<prometheus::IntCounterVec> =
    LazyLock::new(|| {
        prometheus::register_int_counter_vec!(
            "mpc_tee_attestation_attempts_total",
            "Total number of completed TEE attestation generation attempts",
            &["outcome"],
        )
        .unwrap()
    });

pub const MPC_TEE_ATTESTATION_OUTCOME_SUCCESS: &str = "success";
pub const MPC_TEE_ATTESTATION_OUTCOME_FAILURE: &str = "failure";