{%- set ns = namespace(system_text="") -%}
{%- for m in messages -%}
  {%- if m.role == 'system' -%}
    {%- if m.content is string -%}
      {%- set ns.system_text = ns.system_text + m.content -%}
    {%- else -%}
      {%- for c in m.content -%}
        {%- if c.type == 'text' and (c.text is defined) -%}
          {%- set ns.system_text = ns.system_text + c.text -%}
        {%- endif -%}
      {%- endfor -%}
    {%- endif -%}
  {%- endif -%}
{%- endfor -%}

{%- set ns2 = namespace(audio_tokens="") -%}
{%- for m in messages -%}
  {%- if m.content is not string -%}
    {%- for c in m.content -%}
      {%- if c.type == 'audio' or ('audio' in c) or ('audio_url' in c) -%}
        {%- set ns2.audio_tokens = ns2.audio_tokens + "<|audio_start|><|audio_pad|><|audio_end|>" -%}
      {%- endif -%}
    {%- endfor -%}
  {%- endif -%}
{%- endfor -%}

{{- '<|im_start|>system\n' + (ns.system_text if ns.system_text is string else '') + '<|im_end|>\n' -}}
{{- '<|im_start|>user\n' + ns2.audio_tokens + '<|im_end|>\n' -}}
{%- if add_generation_prompt -%}
{{- '<|im_start|>assistant\n' -}}
{%- endif -%}