{{- bos_token if bos_token is defined else '' }}
{%- if custom_tools is defined and custom_tools is not none %}
    {%- set tools = custom_tools %}
{%- endif %}
{%- if tools is not defined %}
    {%- set tools = none %}
{%- endif %}
{%- if tools is not none and tools is iterable and tools is not mapping and tools|length == 0 %}
    {%- set tools = none %}
{%- endif %}
{%- if tools_in_user_message is not defined %}
    {#- Llama 3.1-style tool prompting is most stable when tools are injected into the first user turn. #}
    {%- set tools_in_user_message = true %}
{%- endif %}
{%- if date_string is not defined %}
    {%- if strftime_now is defined %}
        {%- set date_string = strftime_now("%d %b %Y") %}
    {%- else %}
        {#- Avoid baking a stale Today Date into newer data. Pass date_string explicitly if needed. #}
        {%- set date_string = none %}
    {%- endif %}
{%- endif %}
{%- if cutoff_date_string is not defined %}
    {%- set cutoff_date_string = "December 2023" %}
{%- endif %}
{%- if image_token is not defined %}
    {%- set image_token = "<|image|>" %}
{%- endif %}
{%- if video_token is not defined %}
    {%- set video_token = "<|video|>" %}
{%- endif %}

{#- Modern content renderer inspired by Qwen-style templates.
    Supports:
    - string content
    - None / missing content
    - list content blocks: {type: text, text: ...}, {type: image/image_url/input_image, ...}, {type: video/input_video, ...}
    - direct {text: ...}, {image: ...}, {image_url: ...}, {video: ...}
#}
{%- set image_count = namespace(value=0) %}
{%- set video_count = namespace(value=0) %}

{%- macro render_content_item(item, do_vision_count, is_system_content=false) %}
    {%- if item is string %}
        {{- item }}
    {%- elif item is mapping %}
        {%- set item_type = item.get('type', '') %}
        {%- if item_type in ['image', 'image_url', 'input_image'] or 'image' in item or 'image_url' in item %}
            {%- if is_system_content %}
                {{- raise_exception('System message cannot contain images.') }}
            {%- endif %}
            {%- if do_vision_count %}
                {%- set image_count.value = image_count.value + 1 %}
            {%- endif %}
            {%- if add_vision_id is defined and add_vision_id %}
                {{- 'Picture ' ~ image_count.value ~ ': ' }}
            {%- endif %}
            {{- image_token }}
        {%- elif item_type in ['video', 'input_video'] or 'video' in item %}
            {%- if is_system_content %}
                {{- raise_exception('System message cannot contain videos.') }}
            {%- endif %}
            {%- if do_vision_count %}
                {%- set video_count.value = video_count.value + 1 %}
            {%- endif %}
            {%- if add_vision_id is defined and add_vision_id %}
                {{- 'Video ' ~ video_count.value ~ ': ' }}
            {%- endif %}
            {{- video_token }}
        {%- elif 'text' in item %}
            {{- item.text }}
        {%- elif item_type in ['text', 'input_text'] and 'content' in item %}
            {{- item.content }}
        {%- elif 'content' in item %}
            {{- render_content(item.content, do_vision_count, is_system_content) }}
        {%- else %}
            {{- raise_exception('Unexpected item type in content.') }}
        {%- endif %}
    {%- elif item is none or item is undefined %}
        {{- '' }}
    {%- else %}
        {{- raise_exception('Unexpected item type in content.') }}
    {%- endif %}
{%- endmacro %}

{%- macro render_content(content, do_vision_count, is_system_content=false) %}
    {%- if content is string %}
        {{- content }}
    {%- elif content is none or content is undefined %}
        {{- '' }}
    {%- elif content is mapping %}
        {{- render_content_item(content, do_vision_count, is_system_content) }}
    {%- elif content is iterable %}
        {%- for item in content %}
            {{- render_content_item(item, do_vision_count, is_system_content) }}
        {%- endfor %}
    {%- else %}
        {{- raise_exception('Unexpected content type.') }}
    {%- endif %}
{%- endmacro %}

{%- macro render_tool_call_json(tool_call) %}
    {%- if tool_call.function is defined %}
        {%- set fn = tool_call.function %}
    {%- else %}
        {%- set fn = tool_call %}
    {%- endif %}
    {%- if fn.name is not defined %}
        {{- raise_exception('Tool call is missing function name.') }}
    {%- endif %}
    {%- set args = fn.arguments if fn.arguments is defined and fn.arguments is not none else {} %}
    {{- '{"name": ' }}{{- fn.name | tojson }}{{- ', "parameters": ' }}
    {%- if args is string and args|trim %}
        {{- args }}
    {%- else %}
        {{- args | tojson }}
    {%- endif %}
    {{- '}' }}
{%- endmacro %}

{%- macro render_tool_calls_json(tool_calls) %}
    {%- if tool_calls|length == 1 %}
        {{- render_tool_call_json(tool_calls[0]) }}
    {%- else %}
        {{- '[' }}
        {%- for tool_call in tool_calls %}
            {{- render_tool_call_json(tool_call) }}
            {%- if not loop.last %}
                {{- ', ' }}
            {%- endif %}
        {%- endfor %}
        {{- ']' }}
    {%- endif %}
{%- endmacro %}

{%- if not messages %}
    {{- raise_exception('No messages provided.') }}
{%- endif %}

{#- Extract an initial system/developer message, so we can slot it into the Llama system header. #}
{%- if messages[0]['role'] == 'system' or messages[0]['role'] == 'developer' %}
    {%- set system_message = render_content(messages[0]['content'], false, true)|trim %}
    {%- set messages = messages[1:] %}
{%- else %}
    {%- if tools is not none %}
        {%- set system_message = "You are a helpful assistant with tool calling capabilities. Only reply with a tool call if the function exists in the library provided by the user. If it doesn't exist, just reply directly in natural language. When you receive a tool call response, use the output to format an answer to the original user question." %}
    {%- else %}
        {%- set system_message = "" %}
    {%- endif %}
{%- endif %}

{#- System message #}
{{- "<|start_header_id|>system<|end_header_id|>\n\n" }}
{%- if tools is not none %}
    {{- "Environment: ipython\n" }}
{%- endif %}
{%- if cutoff_date_string %}
    {{- "Cutting Knowledge Date: " + cutoff_date_string + "\n" }}
{%- endif %}
{%- if date_string %}
    {{- "Today Date: " + date_string + "\n" }}
{%- endif %}
{%- if tools is not none or cutoff_date_string or date_string %}
    {{- "\n" }}
{%- endif %}
{%- if tools is not none and not tools_in_user_message %}
    {{- "You have access to the following functions. To call a function, please respond with JSON for a function call. " }}
    {{- 'For a single function call, respond in the format {"name": function name, "parameters": dictionary of argument name and its value}. ' }}
    {{- 'If multiple function calls are required, respond with a JSON array of objects in that same format. ' }}
    {{- "Do not use variables.\n\n" }}
    {%- for t in tools %}
        {{- t | tojson(indent=4) }}
        {{- "\n\n" }}
    {%- endfor %}
{%- endif %}
{{- system_message }}
{{- "<|eot_id|>" }}

{#- Custom tools can be passed in the first user message with extra guidance. #}
{%- if tools_in_user_message and tools is not none %}
    {%- if messages | length != 0 %}
        {%- set first_user_message = render_content(messages[0]['content'], true)|trim %}
        {%- set messages = messages[1:] %}
    {%- else %}
        {{- raise_exception("Cannot put tools in the first user message when there's no first user message!") }}
    {%- endif %}
    {{- '<|start_header_id|>user<|end_header_id|>\n\n' -}}
    {{- "Given the following functions, please respond with JSON for a function call " }}
    {{- "with its proper arguments that best answers the given prompt.\n\n" }}
    {{- 'For a single function call, respond in the format {"name": function name, "parameters": dictionary of argument name and its value}. ' }}
    {{- 'If multiple function calls are required, respond with a JSON array of objects in that same format. ' }}
    {{- "Do not use variables.\n\n" }}
    {%- for t in tools %}
        {{- t | tojson(indent=4) }}
        {{- "\n\n" }}
    {%- endfor %}
    {{- first_user_message + "<|eot_id|>" }}
{%- endif %}

{%- for message in messages %}
    {%- set role = message.role %}
    {%- if role == 'system' or role == 'developer' %}
        {{- '<|start_header_id|>system<|end_header_id|>\n\n' }}
        {{- render_content(message.content, true, true)|trim }}
        {{- '<|eot_id|>' }}
    {%- elif role == 'user' %}
        {{- '<|start_header_id|>user<|end_header_id|>\n\n' }}
        {{- render_content(message.content, true)|trim }}
        {{- '<|eot_id|>' }}
    {%- elif role == 'assistant' %}
        {%- set content = render_content(message.content, true)|trim %}
        {%- set reasoning_content = '' %}
        {%- if message.reasoning_content is defined and message.reasoning_content is string %}
            {%- set reasoning_content = message.reasoning_content|trim %}
        {%- elif '</think>' in content %}
            {%- set reasoning_content = content.split('</think>')[0].rstrip('\n').split('<think>')[-1].lstrip('\n')|trim %}
            {%- set content = content.split('</think>')[-1].lstrip('\n')|trim %}
        {%- endif %}
        {{- '<|start_header_id|>assistant<|end_header_id|>\n\n' }}
        {%- if reasoning_content %}
            {{- '<think>\n' + reasoning_content + '\n</think>\n\n' }}
        {%- endif %}
        {{- content }}
        {%- if message.tool_calls is defined and message.tool_calls and message.tool_calls is iterable and message.tool_calls is not mapping %}
            {%- if content or reasoning_content %}
                {{- '\n\n' }}
            {%- endif %}
            {{- render_tool_calls_json(message.tool_calls) }}
        {%- endif %}
        {{- '<|eot_id|>' }}
    {%- elif role == 'tool' or role == 'ipython' or role == 'function' %}
        {{- '<|start_header_id|>ipython<|end_header_id|>\n\n' }}
        {%- if message.content is mapping %}
            {{- {"output": message.content} | tojson }}
        {%- else %}
            {%- set tool_content = render_content(message.content, true)|trim %}
            {{- {"output": tool_content} | tojson }}
        {%- endif %}
        {{- '<|eot_id|>' }}
    {%- else %}
        {{- raise_exception('Unexpected message role: ' + role) }}
    {%- endif %}
{%- endfor %}

{%- if add_generation_prompt is defined and add_generation_prompt %}
    {{- '<|start_header_id|>assistant<|end_header_id|>\n\n' }}
    {%- if enable_thinking is defined and enable_thinking %}
        {{- '<think>\n' }}
    {%- endif %}
{%- endif %}