// ----------------------------------------------------------------------
class axi_transaction extends uvm_sequence_item;
    // Declare AXI transaction fields
    rand axi_transaction_type_t         txn_type; // Transaction type (read/write)
    rand bit [`ADDR_WIDTH-1:0]          addr; // Address
    rand bit [`DATA_WIDTH-1:0]          data; // Data
    rand bit [`DATA_WIDTH_DIV_8-1:0]    strb; // Byte enable
    rand bit [`BRESP_WIDTH-1:0]         resp; // Response code
    rand bit [2:0]                      size; // Size
    rand bit [7:0]                      length; // Length

    `uvm_object_utils_begin(axi_transaction)
        `uvm_field_enum(axi_transaction_type_t, txn_type, UVM_DEFAULT)
        `uvm_field_int(addr, UVM_DEFAULT)
        `uvm_field_int(data, UVM_DEFAULT)
        `uvm_field_int(strb, UVM_DEFAULT)
        `uvm_field_int(resp, UVM_DEFAULT)
        `uvm_field_int(size, UVM_DEFAULT)
        `uvm_field_int(length, UVM_DEFAULT)
    `uvm_object_utils_end

    // Constructor
    function new(string name = "axi_transaction");
        super.new(name);
    endfunction

    // Get transaction id - made up of sequence ID and trasacton ID
    function axi_transaction_id_t get_tid();
        axi_transaction_id_t tid;

        tid.seq_id = this.get_sequence_id();
        tid.txn_id = this.get_transaction_id();

        return tid;
    endfunction

    // Show transaction id - sequence ID:trasacton ID
    function string show_tid();
        return $sformatf("%0h:%0h", this.get_sequence_id(), this.get_transaction_id());
    endfunction

    // Show transaction tag - Transaction type:sequence ID:trasacton ID
    function string show_tag();
        return $sformatf("%s:%0h:%0h", this.txn_type.name(), this.get_sequence_id(), this.get_transaction_id());
    endfunction

    // Wait for transaction to be done
    task wait_for_done();
        uvm_event finished_event;

        finished_event = get_event_pool().get("finished");
        finished_event.wait_on();
    endtask

    // Copy method for cloning
    virtual function uvm_object clone();
        axi_transaction copy;
        copy = axi_transaction::type_id::create(get_name());
        copy.txn_type = this.txn_type;
        copy.addr = this.addr;
        copy.data = this.data;
        copy.strb = this.strb;
        copy.resp = this.resp;
        copy.size = this.size;
        copy.length = this.length;
        return copy;
    endfunction

    // Comparison method for checking equality
    virtual function bit compare(uvm_object rhs);
        axi_transaction other;
        if (!$cast(other, rhs)) return 0; // Ensure type match
        return (this.txn_type == other.txn_type) &&
               (this.addr == other.addr) &&
               (this.data == other.data) &&
               (this.strb == other.strb) &&
               (this.size == other.size) &&
               (this.length == other.length);
    endfunction

    // Tracker print line
    static function string tracker_line_hdr();
        return $sformatf("%7s %10s %16s %16s %4s %3s %3s",
                "TIME", "TYPE", "ADDR", "DATA", "STRB", "SZ", "LEN");
    endfunction

    function string tracker_line();
        return $sformatf("%7t %10s %16h %16h %4h %3d %3d",
                $time, this.txn_type.name(), this.addr,
                this.data, this.strb, this.size, this.length);
    endfunction

endclass : axi_transaction