{%- macro visible_text(content) -%}
    {%- if content is string -%}
        {{- content -}}
    {%- elif content is iterable and content is not mapping -%}
        {%- for item in content -%}
            {%- if item is mapping and item.type == 'text' -%}
                {{- item.text -}}
            {%- elif item is string -%}
                {{- item -}}
            {%- endif -%}
        {%- endfor -%}
    {%- else -%}
        {{- content -}}
    {%- endif -%}
{%- endmacro -%}

{{- '<|beginoftext|>' -}}

{%- set ns = namespace(has_system=false, last_user_index=-1, last_assistant_index=-1) -%}
{%- if messages | length > 0 and messages[0].role == 'system' -%}
    {%- set ns.has_system = true -%}
{%- endif -%}
{%- for m in messages -%}
    {%- if m.role == 'user' -%}
        {%- set ns.last_user_index = loop.index0 -%}
    {%- elif m.role == 'assistant' -%}
        {%- set ns.last_assistant_index = loop.index0 -%}
    {%- endif -%}
{%- endfor -%}

{#- ── System / Tools block ── -#}
{%- if tools is iterable and tools | length > 0 -%}
    {{- '<|startofturn|><|system|>' -}}
    {{- '# Tools\n\nYou may call one or more functions to assist with the user query.\n\n' -}}
    {{- 'You are provided with function signatures within <tools></tools> XML tags:\n\n<tools>' -}}
    {%- for tool in tools -%}
        {%- if tool.function is defined -%}
            {%- set tool = tool.function -%}
        {%- endif -%}
        {{- '\n' ~ (tool | tojson) -}}
    {%- endfor -%}
    {{- '\n</tools>' -}}
    {{- '\n\nFor each function call, output in JSON within <tool_call> tags:\n' -}}
    {%- for tool in tools -%}
        {%- if tool.function is defined -%}
            {%- set tool = tool.function -%}
        {%- endif -%}
        {%- set _props = tool.parameters.properties if (tool.parameters is defined and tool.parameters.properties is defined) else {} -%}
        {{- '\n<tool_call>{"name": "' ~ tool.name ~ '", "arguments": {' -}}
        {%- set _keys = _props | list -%}
        {%- for k in _keys -%}
            {{- '"' ~ k ~ '": <' ~ k ~ '>' -}}
            {%- if not loop.last -%}{{- ', ' -}}{%- endif -%}
        {%- endfor -%}
        {{- '}}</tool_call>' -}}
    {%- endfor -%}
    {%- if ns.has_system -%}
        {{- '\n\n' ~ visible_text(messages[0].content) -}}
    {%- endif -%}
    {{- '<|endofturn|>' -}}
{%- elif ns.has_system -%}
    {{- '<|startofturn|><|system|>' ~ visible_text(messages[0].content) ~ '<|endofturn|>' -}}
{%- endif -%}

{#- ── Conversation turns ── -#}
{%- for m in messages -%}

    {#- [Fix 1] continue 대신 if/elif 체인으로 첫 system 스킵 -#}
    {%- if loop.index0 == 0 and m.role == 'system' -%}
        {#- already rendered above, skip -#}

    {#- [Fix 2] 중간에 나오는 system 메시지도 처리 -#}
    {%- elif m.role == 'system' -%}
        {{- '<|startofturn|><|system|>' ~ visible_text(m.content) ~ '<|endofturn|>' -}}

    {%- elif m.role == 'user' -%}
        {{- '<|startofturn|><|user|>' -}}
        {%- if m.references is defined and m.references -%}
            {{- '<|reference|>' ~ m.references ~ '\n' -}}
        {%- endif -%}
        {{- visible_text(m.content) -}}
        {{- '<|endofturn|>' -}}

    {%- elif m.role == 'assistant' -%}
        {{- '<|startofturn|><|assistant|>' -}}

        {#- [순서 정책] think → plan → content → tool_calls -#}

        {#- Reasoning block -#}
        {%- set _content = visible_text(m.content) -%}
        {%- set _reasoning = '' -%}
        {%- if m.reasoning_content is string -%}
            {%- set _reasoning = m.reasoning_content -%}
        {%- elif '</think>' in _content -%}
            {%- set _reasoning = _content.split('</think>')[0].split('<think>')[-1].strip() -%}
            {%- set _content = _content.split('</think>', 1)[-1].lstrip('\n') -%}
        {%- endif -%}
        {%- set _has_tools = (tools is defined and tools is iterable and tools | length > 0) -%}
        {%- set _emit_think = _reasoning and (_has_tools or loop.index0 == ns.last_assistant_index) -%}
        {%- if _emit_think -%}
            {{- '<think>' ~ _reasoning.strip() ~ '</think>' -}}
        {%- endif -%}

        {#- Text content -#}
        {%- if _content.strip() -%}
            {{- _content.strip() -}}
        {%- endif -%}

        {#- Tool calls — IDs are rendered for intermediate assistant turns
             (context for call↔response correlation) but omitted for the last
             assistant turn (prediction target — model should not learn to
             generate IDs). After multi-turn data expansion, intermediate turns
             become GRAY context and the last turn is GREEN. -#}
        {%- if m.tool_calls is defined and m.tool_calls -%}
            {%- set _is_last_assistant = (loop.index0 == ns.last_assistant_index) and not add_generation_prompt -%}
            {%- for tc in m.tool_calls -%}
                {%- set _tc_id = tc.id if (tc.id is defined and not _is_last_assistant) else none -%}
                {%- if tc.function is defined -%}
                    {%- set tc = tc.function -%}
                {%- endif -%}
                {%- set _id_suffix = ', "id": ' ~ (_tc_id | tojson) if _tc_id is not none else '' -%}
                {%- if tc.arguments is not defined or not tc.arguments or tc.arguments == "" -%}
                    {{- '\n<tool_call>' ~ '{"name": "' ~ tc.name ~ '", "arguments": ' ~ null ~ _id_suffix ~ '}' ~ '</tool_call>' -}}
                {%- elif tc.arguments is string -%}
                    {{- '\n<tool_call>' ~ '{"name": "' ~ tc.name ~ '", "arguments": ' ~ tc.arguments ~ _id_suffix ~ '}' ~ '</tool_call>' -}}
                {%- else -%}
                    {{- '\n<tool_call>' ~ '{"name": "' ~ tc.name ~ '", "arguments": ' ~ (tc.arguments | tojson) ~ _id_suffix ~ '}' ~ '</tool_call>' -}}
                {%- endif -%}
            {%- endfor -%}
        {%- endif -%}

        {{- '<|endofturn|>' -}}

    {%- elif m.role == 'tool' -%}
        {#- [Fix 3] loop.previtem/nextitem으로 인덱스 오버플로 제거 -#}
        {%- if loop.first or loop.previtem.role != 'tool' -%}
            {{- '<|startofturn|><|tool|>' -}}
        {%- endif -%}
        {{- '<tool_response>' ~ ({"tool_call_id": m.tool_call_id, "content": m.content} | tojson) ~ '</tool_response>' -}}
        {%- if loop.last or loop.nextitem.role != 'tool' -%}
            {{- '<|endofturn|>' -}}
        {%- endif -%}

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

{#- ── Generation prompt ── -#}
{%- if add_generation_prompt -%}
    {{- '<|startofturn|><|assistant|>' -}}
    {%- if enable_thinking is defined and not enable_thinking -%}
        {{- '<think></think>' -}}
    {%- else -%}
        {{- '<think>' -}}
    {%- endif -%}
{%- else -%}
    {{- '<|endoftext|>' -}}
{%- endif -%}