{% set image_count = namespace(value=0) %}
{% set video_count = namespace(value=0) %}

{%- set role_indicators = {
    'user': '<|user|>\n',
    'assistant': '<|assistant|>\n',
    'system': '<|system|>\n',
    'tool': '<|tool|>\n',
    'tool_declare': '<|tool_declare|>\n'
} %}
{%- set end_of_turn = '<|endofturn|>\n' %}


{%- macro declare_available_tools(tools) %}
    {{- "# Tools" }}
    {{- "\n" }}
    {%- for tool in tools %}
        {{- "<tool>" }}
        {{- tool | tojson(ensure_ascii=False) | safe }}
        {{- "</tool>\n" }}
    {%- endfor %}
{%- endmacro %}


{%- set ns = namespace(last_query_index = messages|length - 1, last_query_index_not_yet_determined = true) %}
{%- for message in messages[::-1] %}
    {%- set index = (messages|length - 1) - loop.index0 %}
    {%- if ns.last_query_index_not_yet_determined and message.role == "user" and message.content is string %}
        {%- set ns.last_query_index = index -%}
        {%- set ns.last_query_index_not_yet_determined = false -%}
    {%- endif %}
{%- endfor %}

{%- if tools is defined and tools %}
    {{- role_indicators['tool_declare'] }}
    {{- declare_available_tools(tools) }}
    {{- end_of_turn -}}  
{%- endif %}

{%- for i in range(messages | length) %}
    {%- set msg = messages[i] %}
    {%- set role = msg.role %}
    {%- if role not in role_indicators %}
        {{- raise_exception('Unknown role: ' ~ role) }}
    {%- endif %}
    
    {%- if i == 0 %}
        {%- if role == 'system' %}
            {{- role_indicators['system'] }}
            {{- msg.content }}
            {{- end_of_turn -}}
            {%- continue %}          
        {%- endif %}
    {%- endif %}

    {%- if role == 'assistant' %}
        {{- role_indicators['assistant'] }}

        {%- set content = (msg.content if (msg.content is defined and msg.content) else "") -%}
        {%- set reasoning = none -%}

        {%- if msg.reasoning_content is defined and msg.reasoning_content%}
            {%- set reasoning = msg.reasoning_content.strip() -%}
        {%- elif content and "</think>" in content %}
            {%- set _parts = content.split('</think>') -%}
            {%- set reasoning = _parts[0].lstrip('<think>').strip() -%}
            {%- set content = _parts[-1].strip() -%}
        {%- endif %}

        {%- if not (reasoning and i > ns.last_query_index) or (skip_think is defined and skip_think) %}
            {%- set reasoning = none %}
        {%- endif %}

        {%- set content = content.strip() -%}
        
        {{- "<think>\n" }}
        {{- (reasoning if reasoning is not none else "") }}
        {{- "\n</think>\n\n" }}

        {{- content }}

        {%- if msg.tool_calls %}
            {%- if content is defined and content %}
                {{- "\n" }}
            {%- endif %}
            {%- for tool_call in msg.tool_calls %}
                {%- if tool_call.function is defined %}
                    {%- set tool_call = tool_call.function %}
                {%- endif %}

                {%- if tool_call.arguments is defined %}
                    {%- set arguments = tool_call.arguments %}
                {%- elif tool_call.parameters is defined %}
                    {%- set arguments = tool_call.parameters %}
                {%- else %}
                    {{- raise_exception('arguments or parameters are mandatory: ' ~ tool_call) }}
                {%- endif %}
                {%- if arguments is string %}
                    {{- "<tool_call>" }}{"name": "{{- tool_call.name }}", "arguments": {{ arguments }}}{{- "</tool_call>" }}
                {%- else %}
                    {{- "<tool_call>" }}{"name": "{{- tool_call.name }}", "arguments": {{ arguments | tojson(ensure_ascii=False) | safe }}}{{- "</tool_call>" }}
                {%- endif %}
                {%- if not loop.last %}
                    {{- "\n" }}
                {%- endif %}

            {%- endfor %}
        {%- endif %}
        {{- end_of_turn -}}

    {%- elif role == "tool" %}
        {%- if i == 0 or messages[i - 1].role != "tool" %}
            {{- role_indicators['tool'] }}
        {%- endif %}
        {%- if msg.content is defined %}          
            {%- if msg.content is string %}  
                {{- "<tool_result>" }}{{ msg.content }}{{- "</tool_result>" }} 
            {%- else %}
                {{- "<tool_result>" }}{{ msg.content | tojson(ensure_ascii=False) | safe }}{{- "</tool_result>" }}            
            {%- endif %}
        {%- endif %}
        {%- if loop.last or messages[i + 1].role != "tool" %}
            {{- end_of_turn -}}
        {%- else %}
            {{- "\n" }}
        {%- endif %}

    {%- else %}
        {{- role_indicators[role] }}
        {%- if msg.content is string %}
            {{- msg.content }}
        {%- else %}
            {%- for content in msg.content %} 
                {%- if content.type == 'image' %}
                    {%- set image_count.value = image_count.value + 1 %}
                    {%- if add_vision_id %}Picture {{ image_count.value }}: {% endif %}<vision><image_pad></vision>
                {%- elif content.type == 'video' %}
                    {%- set video_count.value = video_count.value + 1 %}
                    {%- if add_vision_id %}Video {{ video_count.value }}: {% endif %}<vision><video_pad></vision>
                {%- elif content.type == 'text' %}
                    {{- content.text }}
                {%- else %}
                    {{- content.text }}
                {%- endif %}
            {%- endfor %}
        {%- endif %}
        {{- end_of_turn -}}
    {%- endif %}
{% endfor %}


{%- if add_generation_prompt %}
    {{- role_indicators['assistant'] }}
    {%- if enable_thinking is not defined or enable_thinking is true %}
        {{- "<think>\n" }}
    {%- else %}
        {{- "<think>\n\n</think>\n\n" }}
    {%- endif %}
{%- endif %}