matc 0.1.2

//! Matter TLV encoders and decoders for Group Key Management Cluster
//! Cluster ID: 0x003F
//!
//! This file is automatically generated from Group-Key-Management-Cluster.xml

use crate::tlv;
use anyhow;
use serde_json;


// Import serialization helpers for octet strings
use crate::clusters::helpers::{serialize_opt_bytes_as_hex};

// Enum definitions

#[derive(Debug, Clone, Copy, PartialEq, Eq, serde::Serialize, serde::Deserialize)]
#[repr(u8)]
pub enum GroupKeyMulticastPolicy {
    /// Indicates filtering of multicast messages for a specific Group ID
    Pergroupid = 0,
    /// Indicates not filtering of multicast messages
    Allnodes = 1,
}

impl GroupKeyMulticastPolicy {
    /// Convert from u8 value
    pub fn from_u8(value: u8) -> Option<Self> {
        match value {
            0 => Some(GroupKeyMulticastPolicy::Pergroupid),
            1 => Some(GroupKeyMulticastPolicy::Allnodes),
            _ => None,
        }
    }

    /// Convert to u8 value
    pub fn to_u8(self) -> u8 {
        self as u8
    }
}

impl From<GroupKeyMulticastPolicy> for u8 {
    fn from(val: GroupKeyMulticastPolicy) -> Self {
        val as u8
    }
}

#[derive(Debug, Clone, Copy, PartialEq, Eq, serde::Serialize, serde::Deserialize)]
#[repr(u8)]
pub enum GroupKeySecurityPolicy {
    /// Message counter synchronization using trust-first
    Trustfirst = 0,
    /// Message counter synchronization using cache-and-sync
    Cacheandsync = 1,
}

impl GroupKeySecurityPolicy {
    /// Convert from u8 value
    pub fn from_u8(value: u8) -> Option<Self> {
        match value {
            0 => Some(GroupKeySecurityPolicy::Trustfirst),
            1 => Some(GroupKeySecurityPolicy::Cacheandsync),
            _ => None,
        }
    }

    /// Convert to u8 value
    pub fn to_u8(self) -> u8 {
        self as u8
    }
}

impl From<GroupKeySecurityPolicy> for u8 {
    fn from(val: GroupKeySecurityPolicy) -> Self {
        val as u8
    }
}

// Struct definitions

#[derive(Debug, serde::Serialize)]
pub struct GroupInfoMap {
    pub group_id: Option<u8>,
    pub endpoints: Option<Vec<u16>>,
    pub group_name: Option<String>,
}

#[derive(Debug, serde::Serialize)]
pub struct GroupKeyMap {
    pub group_id: Option<u8>,
    pub group_key_set_id: Option<u16>,
}

#[derive(Debug, serde::Serialize)]
pub struct GroupKeySet {
    pub group_key_set_id: Option<u16>,
    pub group_key_security_policy: Option<GroupKeySecurityPolicy>,
    #[serde(serialize_with = "serialize_opt_bytes_as_hex")]
    pub epoch_key0: Option<Vec<u8>>,
    pub epoch_start_time0: Option<u64>,
    #[serde(serialize_with = "serialize_opt_bytes_as_hex")]
    pub epoch_key1: Option<Vec<u8>>,
    pub epoch_start_time1: Option<u64>,
    #[serde(serialize_with = "serialize_opt_bytes_as_hex")]
    pub epoch_key2: Option<Vec<u8>>,
    pub epoch_start_time2: Option<u64>,
    pub group_key_multicast_policy: Option<GroupKeyMulticastPolicy>,
}

// Command encoders

/// Encode KeySetWrite command (0x00)
pub fn encode_key_set_write(group_key_set: GroupKeySet) -> anyhow::Result<Vec<u8>> {
            // Encode struct GroupKeySetStruct
            let mut group_key_set_fields = Vec::new();
            if let Some(x) = group_key_set.group_key_set_id { group_key_set_fields.push((0, tlv::TlvItemValueEnc::UInt16(x)).into()); }
            if let Some(x) = group_key_set.group_key_security_policy { group_key_set_fields.push((1, tlv::TlvItemValueEnc::UInt8(x.to_u8())).into()); }
            if let Some(x) = group_key_set.epoch_key0 { group_key_set_fields.push((2, tlv::TlvItemValueEnc::OctetString(x.clone())).into()); }
            if let Some(x) = group_key_set.epoch_start_time0 { group_key_set_fields.push((3, tlv::TlvItemValueEnc::UInt64(x)).into()); }
            if let Some(x) = group_key_set.epoch_key1 { group_key_set_fields.push((4, tlv::TlvItemValueEnc::OctetString(x.clone())).into()); }
            if let Some(x) = group_key_set.epoch_start_time1 { group_key_set_fields.push((5, tlv::TlvItemValueEnc::UInt64(x)).into()); }
            if let Some(x) = group_key_set.epoch_key2 { group_key_set_fields.push((6, tlv::TlvItemValueEnc::OctetString(x.clone())).into()); }
            if let Some(x) = group_key_set.epoch_start_time2 { group_key_set_fields.push((7, tlv::TlvItemValueEnc::UInt64(x)).into()); }
            if let Some(x) = group_key_set.group_key_multicast_policy { group_key_set_fields.push((8, tlv::TlvItemValueEnc::UInt8(x.to_u8())).into()); }
    let tlv = tlv::TlvItemEnc {
        tag: 0,
        value: tlv::TlvItemValueEnc::StructInvisible(vec![
        (0, tlv::TlvItemValueEnc::StructInvisible(group_key_set_fields)).into(),
        ]),
    };
    Ok(tlv.encode()?)
}

/// Encode KeySetRead command (0x01)
pub fn encode_key_set_read(group_key_set_id: u16) -> anyhow::Result<Vec<u8>> {
    let tlv = tlv::TlvItemEnc {
        tag: 0,
        value: tlv::TlvItemValueEnc::StructInvisible(vec![
        (0, tlv::TlvItemValueEnc::UInt16(group_key_set_id)).into(),
        ]),
    };
    Ok(tlv.encode()?)
}

/// Encode KeySetRemove command (0x03)
pub fn encode_key_set_remove(group_key_set_id: u16) -> anyhow::Result<Vec<u8>> {
    let tlv = tlv::TlvItemEnc {
        tag: 0,
        value: tlv::TlvItemValueEnc::StructInvisible(vec![
        (0, tlv::TlvItemValueEnc::UInt16(group_key_set_id)).into(),
        ]),
    };
    Ok(tlv.encode()?)
}

/// Encode KeySetReadAllIndices command (0x04)
pub fn encode_key_set_read_all_indices(do_not_use: u8) -> anyhow::Result<Vec<u8>> {
    let tlv = tlv::TlvItemEnc {
        tag: 0,
        value: tlv::TlvItemValueEnc::StructInvisible(vec![
        (0, tlv::TlvItemValueEnc::UInt8(do_not_use)).into(),
        ]),
    };
    Ok(tlv.encode()?)
}

// Attribute decoders

/// Decode GroupKeyMap attribute (0x0000)
pub fn decode_group_key_map(inp: &tlv::TlvItemValue) -> anyhow::Result<Vec<GroupKeyMap>> {
    let mut res = Vec::new();
    if let tlv::TlvItemValue::List(v) = inp {
        for item in v {
            res.push(GroupKeyMap {
                group_id: item.get_int(&[1]).map(|v| v as u8),
                group_key_set_id: item.get_int(&[2]).map(|v| v as u16),
            });
        }
    }
    Ok(res)
}

/// Decode GroupTable attribute (0x0001)
pub fn decode_group_table(inp: &tlv::TlvItemValue) -> anyhow::Result<Vec<GroupInfoMap>> {
    let mut res = Vec::new();
    if let tlv::TlvItemValue::List(v) = inp {
        for item in v {
            res.push(GroupInfoMap {
                group_id: item.get_int(&[1]).map(|v| v as u8),
                endpoints: {
                    if let Some(tlv::TlvItemValue::List(l)) = item.get(&[2]) {
                        let items: Vec<u16> = l.iter().filter_map(|e| { if let tlv::TlvItemValue::Int(v) = &e.value { Some(*v as u16) } else { None } }).collect();
                        Some(items)
                    } else {
                        None
                    }
                },
                group_name: item.get_string_owned(&[3]),
            });
        }
    }
    Ok(res)
}

/// Decode MaxGroupsPerFabric attribute (0x0002)
pub fn decode_max_groups_per_fabric(inp: &tlv::TlvItemValue) -> anyhow::Result<u16> {
    if let tlv::TlvItemValue::Int(v) = inp {
        Ok(*v as u16)
    } else {
        Err(anyhow::anyhow!("Expected UInt16"))
    }
}

/// Decode MaxGroupKeysPerFabric attribute (0x0003)
pub fn decode_max_group_keys_per_fabric(inp: &tlv::TlvItemValue) -> anyhow::Result<u16> {
    if let tlv::TlvItemValue::Int(v) = inp {
        Ok(*v as u16)
    } else {
        Err(anyhow::anyhow!("Expected UInt16"))
    }
}


// JSON dispatcher function

/// Decode attribute value and return as JSON string
///
/// # Parameters
/// * `cluster_id` - The cluster identifier
/// * `attribute_id` - The attribute identifier
/// * `tlv_value` - The TLV value to decode
///
/// # Returns
/// JSON string representation of the decoded value or error
pub fn decode_attribute_json(cluster_id: u32, attribute_id: u32, tlv_value: &crate::tlv::TlvItemValue) -> String {
    // Verify this is the correct cluster
    if cluster_id != 0x003F {
        return format!("{{\"error\": \"Invalid cluster ID. Expected 0x003F, got {}\"}}", cluster_id);
    }

    match attribute_id {
        0x0000 => {
            match decode_group_key_map(tlv_value) {
                Ok(value) => serde_json::to_string(&value).unwrap_or_else(|_| "null".to_string()),
                Err(e) => format!("{{\"error\": \"{}\"}}", e),
            }
        }
        0x0001 => {
            match decode_group_table(tlv_value) {
                Ok(value) => serde_json::to_string(&value).unwrap_or_else(|_| "null".to_string()),
                Err(e) => format!("{{\"error\": \"{}\"}}", e),
            }
        }
        0x0002 => {
            match decode_max_groups_per_fabric(tlv_value) {
                Ok(value) => serde_json::to_string(&value).unwrap_or_else(|_| "null".to_string()),
                Err(e) => format!("{{\"error\": \"{}\"}}", e),
            }
        }
        0x0003 => {
            match decode_max_group_keys_per_fabric(tlv_value) {
                Ok(value) => serde_json::to_string(&value).unwrap_or_else(|_| "null".to_string()),
                Err(e) => format!("{{\"error\": \"{}\"}}", e),
            }
        }
        _ => format!("{{\"error\": \"Unknown attribute ID: {}\"}}", attribute_id),
    }
}

/// Get list of all attributes supported by this cluster
///
/// # Returns
/// Vector of tuples containing (attribute_id, attribute_name)
pub fn get_attribute_list() -> Vec<(u32, &'static str)> {
    vec![
        (0x0000, "GroupKeyMap"),
        (0x0001, "GroupTable"),
        (0x0002, "MaxGroupsPerFabric"),
        (0x0003, "MaxGroupKeysPerFabric"),
    ]
}

#[derive(Debug, serde::Serialize)]
pub struct KeySetReadResponse {
    pub group_key_set: Option<GroupKeySet>,
}

#[derive(Debug, serde::Serialize)]
pub struct KeySetReadAllIndicesResponse {
    pub group_key_set_i_ds: Option<Vec<u16>>,
}

// Command response decoders

/// Decode KeySetReadResponse command response (02)
pub fn decode_key_set_read_response(inp: &tlv::TlvItemValue) -> anyhow::Result<KeySetReadResponse> {
    if let tlv::TlvItemValue::List(_fields) = inp {
        let item = tlv::TlvItem { tag: 0, value: inp.clone() };
        Ok(KeySetReadResponse {
                group_key_set: {
                    if let Some(nested_tlv) = item.get(&[0]) {
                        if let tlv::TlvItemValue::List(_) = nested_tlv {
                            let nested_item = tlv::TlvItem { tag: 0, value: nested_tlv.clone() };
                            Some(GroupKeySet {
                group_key_set_id: nested_item.get_int(&[0]).map(|v| v as u16),
                group_key_security_policy: nested_item.get_int(&[1]).and_then(|v| GroupKeySecurityPolicy::from_u8(v as u8)),
                epoch_key0: nested_item.get_octet_string_owned(&[2]),
                epoch_start_time0: nested_item.get_int(&[3]),
                epoch_key1: nested_item.get_octet_string_owned(&[4]),
                epoch_start_time1: nested_item.get_int(&[5]),
                epoch_key2: nested_item.get_octet_string_owned(&[6]),
                epoch_start_time2: nested_item.get_int(&[7]),
                group_key_multicast_policy: nested_item.get_int(&[8]).and_then(|v| GroupKeyMulticastPolicy::from_u8(v as u8)),
                            })
                        } else {
                            None
                        }
                    } else {
                        None
                    }
                },
        })
    } else {
        Err(anyhow::anyhow!("Expected struct fields"))
    }
}

/// Decode KeySetReadAllIndicesResponse command response (05)
pub fn decode_key_set_read_all_indices_response(inp: &tlv::TlvItemValue) -> anyhow::Result<KeySetReadAllIndicesResponse> {
    if let tlv::TlvItemValue::List(_fields) = inp {
        let item = tlv::TlvItem { tag: 0, value: inp.clone() };
        Ok(KeySetReadAllIndicesResponse {
                group_key_set_i_ds: {
                    if let Some(tlv::TlvItemValue::List(l)) = item.get(&[0]) {
                        let items: Vec<u16> = l.iter().filter_map(|e| { if let tlv::TlvItemValue::Int(v) = &e.value { Some(*v as u16) } else { None } }).collect();
                        Some(items)
                    } else {
                        None
                    }
                },
        })
    } else {
        Err(anyhow::anyhow!("Expected struct fields"))
    }
}