#pragma once
#include <algorithm>
#include <cstring>

constexpr size_t AGENT_FINAL_MAX_BYTES = 2048;

template<size_t N> void copy_agent_final(char (&out)[N], const char *value) {
    value=value?value:"";
    size_t size=std::min(std::strlen(value),N-1);
    while (size && (static_cast<unsigned char>(value[size]) & 0xc0U)==0x80U) --size;
    std::memcpy(out,value,size);
    out[size]='\0';
}

struct AgentDisplayText { const char *text; bool terminal; bool tool; };

inline AgentDisplayText agent_display_text(const char *state, const char *final_text,
        const char *activity_type, const char *latest_activity, const char *recent_text) {
    const bool terminal=state && (std::strcmp(state,"DONE")==0 || std::strcmp(state,"FAILED")==0);
    // nullptr means an older Gateway: preserve its activity display for Pi/Codex.
    // An explicit empty terminal reply must not present tool logs as the answer.
    if (terminal && final_text)
        return {*final_text?final_text:"No final response received.",true,false};
    const bool persisted=state && (std::strcmp(state,"DORMANT")==0 || std::strcmp(state,"IDLE")==0);
    if (persisted && final_text && *final_text)
        return {final_text,true,false};
    const bool tool=activity_type && std::strcmp(activity_type,"tool")==0;
    return {tool?latest_activity:recent_text,false,tool};
}