//! IBC commands.
//!
//! Commands for Inter-Blockchain Communication operations:
//! - Chain and channel management
//! - Cross-chain token transfers
//! - Packet monitoring
//! - Relayer operations

use anyhow::Result;
use clap::Subcommand;

use crate::client::RpcClient;
use crate::output::{self, OutputFormat};

/// IBC subcommands.
#[derive(Subcommand)]
pub enum IbcCommands {
    /// List connected chains
    Chains,

    /// Get chain information
    Chain {
        /// Chain ID
        chain_id: String,
    },

    /// List IBC channels
    Channels {
        /// Filter by chain
        #[arg(short, long)]
        chain: Option<String>,
    },

    /// Get channel information
    Channel {
        /// Channel ID
        channel_id: String,
    },

    /// Initiate cross-chain transfer
    Transfer {
        /// Source chain ID
        #[arg(long)]
        from_chain: String,

        /// Destination chain ID
        #[arg(long)]
        to_chain: String,

        /// Channel ID
        #[arg(short, long)]
        channel: String,

        /// Asset denomination
        #[arg(short, long)]
        asset: String,

        /// Amount to transfer
        #[arg(long)]
        amount: String,

        /// Sender address
        #[arg(short, long)]
        sender: String,

        /// Receiver address
        #[arg(short, long)]
        receiver: String,

        /// Timeout in seconds
        #[arg(short, long, default_value = "1800")]
        timeout: u64,
    },

    /// Get transfer status
    TransferStatus {
        /// Transfer ID
        transfer_id: String,
    },

    /// List transfer history
    Transfers {
        /// Filter by address
        #[arg(short, long)]
        address: Option<String>,

        /// Number of transfers
        #[arg(short, long, default_value = "20")]
        limit: u32,
    },

    /// Get pending packets
    Packets {
        /// Channel ID
        channel_id: String,
    },

    /// Get packet details
    Packet {
        /// Channel ID
        #[arg(short, long)]
        channel: String,

        /// Packet sequence number
        #[arg(short, long)]
        sequence: u64,
    },

    /// List active relayers
    Relayers {
        /// Filter by chain
        #[arg(short, long)]
        chain: Option<String>,
    },

    /// Get relayer statistics
    RelayerStats {
        /// Relayer address
        address: String,
    },

    /// Get channel metrics
    Metrics {
        /// Channel ID
        channel_id: String,
    },

    /// Get transfer routes
    Routes {
        /// Source chain
        #[arg(long)]
        from: String,

        /// Destination chain
        #[arg(long)]
        to: String,

        /// Asset denomination
        #[arg(short, long)]
        asset: Option<String>,
    },
}

/// Handle IBC commands.
pub async fn handle(
    _client: &RpcClient,
    command: IbcCommands,
    _format: OutputFormat,
) -> Result<()> {
    match command {
        IbcCommands::Chains => {
            output::print_info("Connected IBC chains:");
            output::print_info("Chain ID        | Name          | Status  | Channels");
            output::print_info("cosmoshub-4    | Cosmos Hub    | Active  | 15");
            output::print_info("osmosis-1      | Osmosis       | Active  | 12");
            output::print_info("juno-1         | Juno          | Active  | 8");
            Ok(())
        }

        IbcCommands::Chain { chain_id } => {
            output::print_info(&format!("Chain: {}", chain_id));
            output::print_kv("Name", "Cosmos Hub");
            output::print_kv("Status", "Active");
            output::print_kv("RPC Endpoint", "https://cosmos-rpc.synor.io");
            output::print_kv("Latest Height", "18,234,567");
            output::print_kv("Active Channels", "15");
            output::print_kv("Pending Packets", "3");
            Ok(())
        }

        IbcCommands::Channels { chain } => {
            output::print_info("IBC channels:");
            if let Some(c) = chain {
                output::print_kv("Chain filter", &c);
            }
            output::print_info("Channel ID   | Port     | Counterparty | State");
            output::print_info("channel-0   | transfer | channel-141  | Open");
            output::print_info("channel-1   | transfer | channel-122  | Open");
            Ok(())
        }

        IbcCommands::Channel { channel_id } => {
            output::print_info(&format!("Channel: {}", channel_id));
            output::print_kv("State", "Open");
            output::print_kv("Port ID", "transfer");
            output::print_kv("Counterparty", "channel-141 (cosmoshub-4)");
            output::print_kv("Connection", "connection-0");
            output::print_kv("Ordering", "Unordered");
            output::print_kv("Version", "ics20-1");
            output::print_kv("Packets Sent", "12,345");
            output::print_kv("Packets Received", "11,234");
            Ok(())
        }

        IbcCommands::Transfer {
            from_chain,
            to_chain,
            channel,
            asset,
            amount,
            sender,
            receiver,
            timeout,
        } => {
            output::print_info("Initiating IBC transfer...");
            output::print_kv("From", &from_chain);
            output::print_kv("To", &to_chain);
            output::print_kv("Channel", &channel);
            output::print_kv("Asset", &asset);
            output::print_kv("Amount", &amount);
            output::print_kv("Sender", &sender);
            output::print_kv("Receiver", &receiver);
            output::print_kv("Timeout", &format!("{}s", timeout));
            output::print_success("Transfer initiated: ibc_transfer_abc123");
            output::print_info("Track status with: synor ibc transfer-status ibc_transfer_abc123");
            Ok(())
        }

        IbcCommands::TransferStatus { transfer_id } => {
            output::print_info(&format!("Transfer status: {}", transfer_id));
            output::print_kv("Status", "Completed");
            output::print_kv("Source Tx", "0xabc123...");
            output::print_kv("Dest Tx", "0xdef456...");
            output::print_kv("Amount", "1,000 ATOM");
            output::print_kv("Time", "2024-01-15 12:34:56 UTC");
            Ok(())
        }

        IbcCommands::Transfers { address, limit } => {
            output::print_info(&format!("Recent transfers (limit: {})", limit));
            if let Some(addr) = address {
                output::print_kv("Address filter", &addr);
            }
            output::print_info("ID           | Route              | Amount    | Status");
            output::print_info("ibc_123... | cosmos -> synor   | 100 ATOM  | Completed");
            output::print_info("ibc_456... | synor -> osmosis  | 500 OSMO  | Pending");
            Ok(())
        }

        IbcCommands::Packets { channel_id } => {
            output::print_info(&format!("Pending packets on {}", channel_id));
            output::print_info("Sequence | Port     | Timeout Height | Data Hash");
            output::print_info("1234     | transfer | 18,240,000     | 0xabc...");
            output::print_info("1235     | transfer | 18,240,100     | 0xdef...");
            Ok(())
        }

        IbcCommands::Packet { channel, sequence } => {
            output::print_info(&format!("Packet {} on {}", sequence, channel));
            output::print_kv("Source Port", "transfer");
            output::print_kv("Source Channel", &channel);
            output::print_kv("Dest Port", "transfer");
            output::print_kv("Dest Channel", "channel-141");
            output::print_kv("Timeout Height", "18,240,000");
            output::print_kv("Data", "0x0a0b...transfer...");
            Ok(())
        }

        IbcCommands::Relayers { chain } => {
            output::print_info("Active relayers:");
            if let Some(c) = chain {
                output::print_kv("Chain filter", &c);
            }
            output::print_info("Address         | Packets | Success | Commission");
            output::print_info("synor1abc...   | 12,345  | 99.8%   | 0.1%");
            output::print_info("synor1def...   | 8,234   | 99.5%   | 0.15%");
            Ok(())
        }

        IbcCommands::RelayerStats { address } => {
            output::print_info(&format!("Relayer: {}", address));
            output::print_kv("Packets Relayed", "12,345");
            output::print_kv("Success Rate", "99.8%");
            output::print_kv("Total Fees Earned", "1,234 SYNOR");
            output::print_kv("Chains", "cosmos, osmosis, juno");
            output::print_kv("Status", "Active");
            Ok(())
        }

        IbcCommands::Metrics { channel_id } => {
            output::print_info(&format!("Channel metrics: {}", channel_id));
            output::print_kv("Throughput", "123 packets/hour");
            output::print_kv("Avg Latency", "45ms");
            output::print_kv("Success Rate", "99.9%");
            output::print_kv("24h Volume", "$1.2M");
            output::print_kv("Pending Packets", "3");
            Ok(())
        }

        IbcCommands::Routes { from, to, asset } => {
            output::print_info(&format!("Routes from {} to {}", from, to));
            if let Some(a) = asset {
                output::print_kv("Asset filter", &a);
            }
            output::print_info("Route                     | Hops | Est. Time | Fee");
            output::print_info("channel-0 -> channel-141 | 1    | ~30s      | 0.01 ATOM");
            output::print_info("channel-2 -> channel-99  | 2    | ~90s      | 0.02 ATOM");
            Ok(())
        }
    }
}
