use super::*;
use tokio_postgres::types::ToSql;

async fn pg_execute_block_signatures(
    statement: &str,
    block_number: i32,
    signatures: &[String],
) -> Result<u64> {
    let params: [&(dyn ToSql + Sync); 2] = [&block_number, &signatures];
    pg_execute(statement, &params).await
}

async fn pg_execute_signatures(statement: &str, signatures: &[String]) -> Result<u64> {
    let params: [&(dyn ToSql + Sync); 1] = [&signatures];
    pg_execute(statement, &params).await
}

pub async fn mark_selected_transactions_processed(
    batch: &SelectedMempoolBatch,
    block_number: u32,
) -> Result<()> {
    // Mark each selected mempool row as processed under the saved block
    // number so it can be cleaned up or restored later if needed.
    let bn = block_number as i32;

    // Selected batches are grouped by table, then marked with one UPDATE per
    // table instead of touching rows one at a time.
    mark_rows_by_ids("transfer", &ids_for_table(batch, "transfer"), bn).await?;
    mark_rows_by_ids("token", &ids_for_table(batch, "token"), bn).await?;
    mark_rows_by_ids("issue_token", &ids_for_table(batch, "issue_token"), bn).await?;
    mark_rows_by_ids("burn", &ids_for_table(batch, "burn"), bn).await?;
    mark_rows_by_ids("nft", &ids_for_table(batch, "nft"), bn).await?;
    mark_rows_by_ids("marketing", &ids_for_table(batch, "marketing"), bn).await?;
    mark_rows_by_ids(
        "vanity_address",
        &ids_for_table(batch, "vanity_address"),
        bn,
    )
    .await?;
    mark_rows_by_ids("swap", &ids_for_table(batch, "swap"), bn).await?;
    mark_rows_by_ids("loan_contract", &ids_for_table(batch, "loan_contract"), bn).await?;
    mark_rows_by_ids("loan_payment", &ids_for_table(batch, "loan_payment"), bn).await?;
    mark_rows_by_ids(
        "collateral_claim",
        &ids_for_table(batch, "collateral_claim"),
        bn,
    )
    .await?;

    Ok(())
}

pub async fn restore_selected_transactions_processed(batch: &SelectedMempoolBatch) -> Result<()> {
    // If block commit fails after selected rows were marked processed,
    // restore them before the chain height can acknowledge the block.
    unmark_rows_by_ids("transfer", &ids_for_table(batch, "transfer")).await?;
    unmark_rows_by_ids("token", &ids_for_table(batch, "token")).await?;
    unmark_rows_by_ids("issue_token", &ids_for_table(batch, "issue_token")).await?;
    unmark_rows_by_ids("burn", &ids_for_table(batch, "burn")).await?;
    unmark_rows_by_ids("nft", &ids_for_table(batch, "nft")).await?;
    unmark_rows_by_ids("marketing", &ids_for_table(batch, "marketing")).await?;
    unmark_rows_by_ids(
        "vanity_address",
        &ids_for_table(batch, "vanity_address"),
    )
    .await?;
    unmark_rows_by_ids("swap", &ids_for_table(batch, "swap")).await?;
    unmark_rows_by_ids(
        "loan_contract",
        &ids_for_table(batch, "loan_contract"),
    )
    .await?;
    unmark_rows_by_ids(
        "loan_payment",
        &ids_for_table(batch, "loan_payment"),
    )
    .await?;
    unmark_rows_by_ids(
        "collateral_claim",
        &ids_for_table(batch, "collateral_claim"),
    )
    .await?;

    Ok(())
}

pub async fn restore_processed_by_signatures(signatures: &[String]) -> Result<bool> {
    // Orphan correction can revive recently processed mempool rows by
    // signature when a saved block is rolled back out of the chain.
    if signatures.is_empty() {
        return Ok(false);
    }

    let mut restored = 0_u64;

    // Each table keeps its own signature columns, so rollback unmarks every
    // column that could contain one of the rolled-back signatures.
    restored += unmark_by_signatures("transfer", "signature", signatures).await?;
    restored += unmark_by_signatures("token", "signature", signatures).await?;
    restored += unmark_by_signatures("issue_token", "signature", signatures).await?;
    restored += unmark_by_signatures("burn", "signature", signatures).await?;
    restored += unmark_by_signatures("nft", "signature", signatures).await?;
    restored += unmark_by_signatures("marketing", "signature", signatures).await?;
    restored += unmark_by_signatures("vanity_address", "signature", signatures).await?;
    restored += unmark_by_signatures("swap", "signature1", signatures).await?;
    restored += unmark_by_signatures("swap", "signature2", signatures).await?;
    restored += unmark_by_signatures("loan_contract", "signature1", signatures).await?;
    restored += unmark_by_signatures("loan_contract", "signature2", signatures).await?;
    restored += unmark_by_signatures("loan_payment", "signature", signatures).await?;
    restored += unmark_by_signatures("collateral_claim", "signature", signatures).await?;

    Ok(restored > 0)
}

pub fn spawn_processed_cleanup(saved_block_number: u32) {
    // Cleanup trails the chain tip by a small depth so recent processed
    // mempool rows can still be restored during short orphan events.
    if saved_block_number <= CLEANUP_DEPTH {
        return;
    }

    if CLEANUP_RUNNING
        .compare_exchange(
            false,
            true,
            crate::AtomicOrdering::SeqCst,
            crate::AtomicOrdering::SeqCst,
        )
        .is_err()
    {
        return;
    }

    task::spawn(async move {
        let safe_block = saved_block_number.saturating_sub(CLEANUP_DEPTH);
        // Cleanup is deliberately delayed behind the tip so short reorgs can
        // still restore recently processed rows.
        if let Err(err) = delete_processed_before_or_at(safe_block, CLEANUP_BATCH_LIMIT).await {
            eprintln!(
                "[mempool_cleanup] failed: saved_block={saved_block_number} safe_block={safe_block} err={err}"
            );
        }
        CLEANUP_RUNNING.store(false, crate::AtomicOrdering::SeqCst);
    });
}

pub async fn mark_processed_by_signatures(signatures: &[String], block_number: u32) -> Result<()> {
    // Synced blocks arrive with signatures instead of selected-row IDs,
    // so processed marking on the updating path works by signature.
    if signatures.is_empty() {
        return Ok(());
    }

    let bn = block_number as i32;

    // Remote/synced blocks do not know local row IDs, so they mark by
    // transaction signatures instead.
    pg_execute_block_signatures(
        "UPDATE transfer SET processed=true, processed_block_number=$1 WHERE signature = ANY($2)",
        bn,
        signatures,
    )
    .await?;
    pg_execute_block_signatures(
        "UPDATE token SET processed=true, processed_block_number=$1 WHERE signature = ANY($2)",
        bn,
        signatures,
    )
    .await?;
    pg_execute_block_signatures(
        "UPDATE issue_token SET processed=true, processed_block_number=$1 WHERE signature = ANY($2)",
        bn,
        signatures,
    )
    .await?;
    pg_execute_block_signatures(
        "UPDATE burn SET processed=true, processed_block_number=$1 WHERE signature = ANY($2)",
        bn,
        signatures,
    )
    .await?;
    pg_execute_block_signatures(
        "UPDATE nft SET processed=true, processed_block_number=$1 WHERE signature = ANY($2)",
        bn,
        signatures,
    )
    .await?;
    pg_execute_block_signatures(
        "UPDATE marketing SET processed=true, processed_block_number=$1 WHERE signature = ANY($2)",
        bn,
        signatures,
    )
    .await?;
    pg_execute_block_signatures(
        "UPDATE vanity_address SET processed=true, processed_block_number=$1 WHERE signature = ANY($2)",
        bn,
        signatures,
    )
    .await?;
    pg_execute_block_signatures(
        "UPDATE swap SET processed=true, processed_block_number=$1 WHERE signature1 = ANY($2)",
        bn,
        signatures,
    )
    .await?;
    pg_execute_block_signatures(
        "UPDATE swap SET processed=true, processed_block_number=$1 WHERE signature2 = ANY($2)",
        bn,
        signatures,
    )
    .await?;
    pg_execute_block_signatures(
        "UPDATE loan_contract SET processed=true, processed_block_number=$1 WHERE signature1 = ANY($2)",
        bn,
        signatures,
    )
    .await?;
    pg_execute_block_signatures(
        "UPDATE loan_contract SET processed=true, processed_block_number=$1 WHERE signature2 = ANY($2)",
        bn,
        signatures,
    )
    .await?;
    pg_execute_block_signatures(
        "UPDATE loan_payment SET processed=true, processed_block_number=$1 WHERE signature = ANY($2)",
        bn,
        signatures,
    )
    .await?;
    pg_execute_block_signatures(
        "UPDATE collateral_claim SET processed=true, processed_block_number=$1 WHERE signature = ANY($2)",
        bn,
        signatures,
    )
    .await?;

    Ok(())
}

pub async fn delete_by_signatures(signatures: &[String]) -> Result<()> {
    // Some validation failures need to remove mempool rows directly by
    // signature regardless of which table the transaction lives in.
    if signatures.is_empty() {
        return Ok(());
    }

    // Failed validation removes every matching pending row no matter which
    // transaction table currently owns the signature.
    pg_execute_signatures("DELETE FROM transfer WHERE signature = ANY($1)", signatures).await?;
    pg_execute_signatures("DELETE FROM token WHERE signature = ANY($1)", signatures).await?;
    pg_execute_signatures(
        "DELETE FROM issue_token WHERE signature = ANY($1)",
        signatures,
    )
    .await?;
    pg_execute_signatures("DELETE FROM burn WHERE signature = ANY($1)", signatures).await?;
    pg_execute_signatures("DELETE FROM nft WHERE signature = ANY($1)", signatures).await?;
    pg_execute_signatures(
        "DELETE FROM marketing WHERE signature = ANY($1)",
        signatures,
    )
    .await?;
    pg_execute_signatures(
        "DELETE FROM vanity_address WHERE signature = ANY($1)",
        signatures,
    )
    .await?;
    pg_execute_signatures(
        "DELETE FROM swap WHERE signature1 = ANY($1) OR signature2 = ANY($1)",
        signatures,
    )
    .await?;
    pg_execute_signatures(
        "DELETE FROM loan_contract WHERE signature1 = ANY($1) OR signature2 = ANY($1)",
        signatures,
    )
    .await?;
    pg_execute_signatures(
        "DELETE FROM loan_payment WHERE signature = ANY($1)",
        signatures,
    )
    .await?;
    pg_execute_signatures(
        "DELETE FROM collateral_claim WHERE signature = ANY($1)",
        signatures,
    )
    .await?;

    Ok(())
}