{%- macro format_parameters(properties, required) -%}
    {%- set standard_keys = ['description', 'type', 'properties', 'required', 'nullable'] -%}
    {%- set ns = namespace(found_first=false) -%}
    {%- for key, value in properties | dictsort -%}
        {%- if key not in standard_keys -%}
            {%- if ns.found_first %},{% endif -%}
            {%- set ns.found_first = true -%}
            {{- key }}:{description:<escape>{{ value['description'] }}<escape>
            {%- if value['type'] | upper == 'STRING' -%}
                {%- if value['enum'] -%}
                    ,enum:{{ format_argument(value['enum']) }}
                {%- endif -%}
            {%- elif value['type'] | upper == 'OBJECT' -%}
                ,properties:{
                {%- if value['properties'] is defined and value['properties'] is mapping -%}
                    {{- format_parameters(value['properties'], value['required'] | default([])) -}}
                {%- elif value is mapping -%}
                    {{- format_parameters(value, value['required'] | default([])) -}}
                {%- endif -%}
                }
                {%- if value['required'] -%}
                    ,required:[
                    {%- for item in value['required'] | default([]) -%}
                        <escape>{{- item -}}<escape>
                        {%- if not loop.last %},{% endif -%}
                    {%- endfor -%}
                    ]
                {%- endif -%}
            {%- elif value['type'] | upper == 'ARRAY' -%}
                {%- if value['items'] is mapping and value['items'] -%}
                    ,items:{
                    {%- set ns_items = namespace(found_first=false) -%}
                    {%- for item_key, item_value in value['items'] | dictsort -%}
                        {%- if item_value is not none -%}
                            {%- if ns_items.found_first %},{% endif -%}
                            {%- set ns_items.found_first = true -%}
                            {%- if item_key == 'properties' -%}
                                properties:{
                                {%- if item_value is mapping -%}
                                    {{- format_parameters(item_value, value['items']['required'] | default([])) -}}
                                {%- endif -%}
                                }
                            {%- elif item_key == 'required' -%}
                                required:[
                                {%- for req_item in item_value -%}
                                    <escape>{{- req_item -}}<escape>
                                    {%- if not loop.last %},{% endif -%}
                                {%- endfor -%}
                                ]
                            {%- elif item_key == 'type' -%}
                                {%- if item_value is string -%}
                                    type:{{ format_argument(item_value | upper) }}
                                {%- else -%}
                                    type:{{ format_argument(item_value | map('upper') | list) }}
                                {%- endif -%}
                            {%- else -%}
                                {{ item_key }}:{{ format_argument(item_value) }}
                            {%- endif -%}
                        {%- endif -%}
                    {%- endfor -%}
                    }
                {%- endif -%}
            {%- endif -%}
            ,type:<escape>{{ value['type'] | upper }}<escape>}
        {%- endif -%}
    {%- endfor -%}
{%- endmacro -%}
{% macro format_function_declaration(tool_data) -%}
declaration:{{- tool_data['function']['name'] -}}
{description:<escape>{{- tool_data['function']['description'] -}}<escape>
{%- set params = tool_data['function']['parameters'] -%}
{%- if params -%}
    ,parameters:{
    {%- if params['properties'] -%}
        properties:{ {{- format_parameters(params['properties'], params['required']) -}} },
    {%- endif -%}
    {%- if params['required'] -%}
        required:[
        {%- for item in params['required'] -%}
            <escape>{{- item -}}<escape>
            {{- ',' if not loop.last -}}
        {%- endfor -%}
        ],
    {%- endif -%}
    {%- if params['type'] -%}
        type:<escape>{{- params['type'] | upper -}}<escape>}
    {%- endif -%}
{%- endif -%}
}
{%- endmacro -%}
{% macro format_argument(argument, escape_keys=True) -%}
{%- if argument is string -%}
    {{- '<escape>' + argument + '<escape>' -}}
{%- elif argument is boolean -%}
    {%- if argument -%}
        {{- 'true' -}}
    {%- else -%}
        {{- 'false' -}}
    {%- endif -%}
{%- elif argument is mapping -%}
    {{- '{' -}}
    {%- set ns = namespace(found_first=false) -%}
    {%- for key, value in argument | dictsort -%}
        {%- if ns.found_first %},{% endif -%}
        {%- set ns.found_first = true -%}
        {%- if escape_keys -%}
            {{- '<escape>' + key + '<escape>' -}}
        {%- else -%}
            {{- key -}}
        {%- endif -%}
        :{{- format_argument(value, escape_keys=escape_keys) -}}
    {%- endfor -%}
    {{- '}' -}}
{%- elif argument is sequence -%}
    {{- '[' -}}
    {%- for item in argument -%}
        {{- format_argument(item, escape_keys=escape_keys) -}}
        {%- if not loop.last %},{% endif -%}
    {%- endfor -%}
    {{- ']' -}}
{%- else -%}
    {{- argument -}}
{%- endif -%}
{%- endmacro -%}
{{ bos_token }}
{%- set ns = namespace(prev_message_type=None) -%}
{#- Tool Declarations -#}
{%- set loop_messages = messages -%}
{%- if tools or messages[0]['role'] == 'system' or messages[0]['role'] == 'developer' -%}
    {{- '<start_of_turn>developer\n' -}}
    {%- if messages[0]['role'] == 'system' or messages[0]['role'] == 'developer' -%}
        {%- if messages[0]['content'] is string -%}
            {{- messages[0]['content'] | trim -}}
        {%- elif messages[0]['content'] is sequence -%}
            {%- for item in messages[0]['content'] -%}
                {%- if item['type'] == 'text' -%}
                    {{- item['text'] | trim -}}
                {%- endif -%}
            {%- endfor -%}
        {%- endif -%}
        {%- set loop_messages = messages[1:] -%}
    {%- endif -%}
    {%- if tools -%}
        {%- for tool in tools %}
            {{- '<start_function_declaration>' -}}
            {{- format_function_declaration(tool) | trim }}
            {{- '<end_function_declaration>' -}}
        {%- endfor %}
    {%- endif -%}
    {{- '<end_of_turn>\n' }}
{%- endif %}
{#- Loop through messages. -#}
{%- for message in loop_messages -%}
    {%- if (message['role'] == 'assistant') -%}
        {#- Rename "assistant" to "model". -#}
        {%- set role = "model" -%}
    {%- else -%}
        {%- set role = message['role'] -%}
    {%- endif -%}
    {%- if role != 'tool' -%}
        {%- if ns.prev_message_type != 'tool_response' -%}
            {{- '<start_of_turn>' + role + '\n' }}
        {%- endif -%}
        {%- set ns.prev_message_type = None -%}
        {%- if 'content' in message and message['content'] is not none -%}
            {%- if message['content'] is string -%}
                {{ message['content'] | trim }}
            {%- elif message['content'] is sequence -%}
                {%- for item in message['content'] -%}
                    {%- if item['type'] == 'image' -%}
                        {{ '<start_of_image>' }}
                    {%- elif item['type'] == 'text' -%}
                        {{ item['text'] | trim }}
                    {%- endif -%}
                {%- endfor -%}
            {%- else -%}
                {{ raise_exception("Invalid content type in user/assistant message") }}
            {%- endif -%}
            {%- set ns.prev_message_type = 'content' -%}
        {%- endif -%}
        {%- if 'tool_calls' in message and message['tool_calls'] and message['tool_calls'] is iterable -%}
            {#- Tool Calls -#}
            {%- for tool_call in message['tool_calls'] -%}
                {% set function = tool_call['function'] %}
                {{-  '<start_function_call>call:' + function['name'] + '{' -}}
                {%- if 'arguments' in function -%}
                    {%- if function['arguments'] is mapping -%}
                        {%- set ns = namespace(found_first=false) -%}
                        {%- for key, value in function['arguments'] | dictsort -%}
                            {%- if ns.found_first %},{% endif -%}
                            {%- set ns.found_first = true -%}
                            {{- key -}}:{{- format_argument(value, escape_keys=False) -}}
                        {%- endfor -%}
                    {%- elif function['arguments'] is string -%}
                        {# This handles string-JSON, just in case #}
                    {{ function['arguments'] }}
                    {%- endif %}
                {%- endif -%}
                {{- '}<end_function_call>' -}}
            {%- endfor -%}
            {%- if loop.last -%}
                {{ '<start_function_response>' }}
            {%- endif -%}
            {%- set ns.prev_message_type = 'tool_call' -%}
        {%- endif -%}
    {%- else -%}
        {#- Tool Responses -#}
        {%- if 'content' in message and message['content'] -%}
            {%- if message['content'] is mapping -%}
                {%- if 'name' in message['content'] and 'response' in message['content'] -%}
                    {{ '<start_function_response>response:' + message['content']['name'] | trim + '{' }}
                    {%- set response_ns = namespace(found_first=false) -%}
                    {%- for key, value in message['content']['response'] | dictsort -%}
                        {%- if response_ns.found_first %},{% endif -%}
                        {%- set response_ns.found_first = true -%}
                        {{- key -}}:{{- format_argument(value, escape_keys=False) -}}
                    {%- endfor -%}
                    {{- '}<end_function_response>' -}}
                {%- elif 'name' in message -%}
                    {{ '<start_function_response>response:' + message['name'] | trim + '{' }}
                    {%- set response_ns = namespace(found_first=false) -%}
                    {%- for key, value in message['content'] | dictsort -%}
                        {%- if response_ns.found_first %},{% endif -%}
                        {%- set response_ns.found_first = true -%}
                        {{- key -}}:{{- format_argument(value, escape_keys=False) -}}
                    {%- endfor -%}
                    {{- '}<end_function_response>' -}}
                {%- else -%}
                    {{ raise_exception("Invalid tool response mapping: must contain 'name' and 'response' keys, or 'name' must be in the message.") }}
                {%- endif -%}
            {%- elif message['content'] is string -%}
                {%- if 'name' in message -%}
                     {{ '<start_function_response>response:' + message['name'] | trim + '{value:' + format_argument(message['content'], escape_keys=False) + '}<end_function_response>' }}
                {%- else -%}
                     {{ raise_exception("Invalid tool response: 'name' must be provided.") }}
                {%- endif -%}
            {%- elif message['content'] is sequence -%}
                {%- for item in message['content'] -%}
                    {%- if item is mapping -%}
                        {%- if 'name' in item and 'response' in item -%}
                            {{ '<start_function_response>response:' + item['name'] | trim + '{' }}
                            {%- set response_ns = namespace(found_first=false) -%}
                            {%- for key, value in item['response'] | dictsort -%}
                                {%- if response_ns.found_first %},{% endif -%}
                                {%- set response_ns.found_first = true -%}
                                {{- key -}}:{{- format_argument(value, escape_keys=False) -}}
                            {%- endfor -%}
                            {{- '}<end_function_response>' -}}
                        {%- elif 'name' in message -%}
                            {{ '<start_function_response>response:' + message['name'] | trim + '{' }}
                            {%- set response_ns = namespace(found_first=false) -%}
                            {%- for key, value in item | dictsort -%}
                                {%- if response_ns.found_first %},{% endif -%}
                                {%- set response_ns.found_first = true -%}
                                {{- key -}}:{{- format_argument(value, escape_keys=False) -}}
                            {%- endfor -%}
                            {{- '}<end_function_response>' -}}
                        {%- else -%}
                            {{ raise_exception("Invalid tool response mapping: must contain 'name' and 'response' keys, or 'name' must be in the message.") }}
                        {%- endif -%}
                    {%- else -%}
                        {{ raise_exception("Invalid tool response message: multiple responses must all be mappings") }}
                    {%- endif -%}
                {%- endfor -%}
            {%- else -%}
                {{ raise_exception("Invalid content type in tool message: must be mapping, sequence of mappings, or string.") }}
            {%- endif -%}
        {%- endif -%}
        {%- set ns.prev_message_type = 'tool_response' -%}
    {%- endif -%}
    {%- if ns.prev_message_type not in ['tool_call', 'tool_response'] -%}
        {{ '<end_of_turn>\n' }}
    {%- endif -%}
{%- endfor -%}
{%- if add_generation_prompt -%}
    {%- if ns.prev_message_type != 'tool_response' -%}
        {{- '<start_of_turn>model\n' -}}
    {%- endif -%}
{%- endif -%}