/*
 * voicecat.cpp — C ABI implementation (M0 skeleton).
 *
 * Lifecycle (create/destroy) and trivial accessors are real. Everything that needs a
 * subsystem (net/crypto/codec/protocol/session/audio) returns VC_ERR_NOT_IMPLEMENTED for
 * now and is the work of M1+ (see AGENTS.md / docs/roadmap.md).
 */
#include "voicecat.h"

#include <new>

#include "core/client.h"

#define VC_STR2(x) #x
#define VC_STR(x) VC_STR2(x)

extern "C" {

const char* vc_version_string(void) {
    static const char* kVersion = VC_STR(VOICECAT_VERSION_MAJOR) "." VC_STR(
        VOICECAT_VERSION_MINOR) "." VC_STR(VOICECAT_VERSION_PATCH);
    return kVersion;
}

const char* vc_result_string(vc_result code) {
    switch (code) {
        case VC_OK: return "ok";
        case VC_ERR_NOT_IMPLEMENTED: return "not implemented";
        case VC_ERR_INVALID_ARG: return "invalid argument";
        case VC_ERR_NOT_CONNECTED: return "not connected";
        case VC_ERR_ALREADY: return "already in requested state";
        case VC_ERR_AUTH_FAILED: return "authentication failed";
        case VC_ERR_PERMISSION_DENIED: return "permission denied";
        case VC_ERR_TIMEOUT: return "timeout";
        case VC_ERR_IO: return "i/o error";
        case VC_ERR_PROTOCOL: return "protocol error";
        case VC_ERR_CRYPTO: return "crypto error";
        case VC_ERR_AUDIO: return "audio error";
        case VC_ERR_INTERNAL: return "internal error";
    }
    return "unknown";
}

vc_client* vc_client_create(const vc_config* cfg, vc_callbacks cb) {
    if (cfg == nullptr) return nullptr;
    return new (std::nothrow) vc_client(*cfg, cb);
}

void vc_client_destroy(vc_client* c) { delete c; }

/* ── Everything below delegates to the (stub) client. ─────────────────────── */

vc_result vc_connect(vc_client* c, const char* host, uint16_t port) {
    if (c == nullptr || host == nullptr) return VC_ERR_INVALID_ARG;
    return c->connect(host, port);
}

vc_result vc_disconnect(vc_client* c) {
    if (c == nullptr) return VC_ERR_INVALID_ARG;
    return c->disconnect();
}

vc_result vc_authenticate_guest(vc_client* c, const char* nickname) {
    if (c == nullptr || nickname == nullptr) return VC_ERR_INVALID_ARG;
    return c->authenticate_guest(nickname);
}

vc_result vc_authenticate_user(vc_client* c, const char* username, const char* password) {
    if (c == nullptr || username == nullptr || password == nullptr) return VC_ERR_INVALID_ARG;
    return c->authenticate_user(username, password);
}

vc_result vc_join_channel(vc_client* c, uint32_t channel_id, const char* password) {
    if (c == nullptr) return VC_ERR_INVALID_ARG;
    return c->join_channel(channel_id, password);
}

vc_result vc_leave_channel(vc_client* c) {
    if (c == nullptr) return VC_ERR_INVALID_ARG;
    return c->leave_channel();
}

vc_result vc_stream_start(vc_client* c, const vc_stream_desc* desc, uint32_t* out_stream_id) {
    if (c == nullptr || desc == nullptr) return VC_ERR_INVALID_ARG;
    return c->stream_start(*desc, out_stream_id);
}

vc_result vc_stream_stop(vc_client* c, uint32_t stream_id) {
    if (c == nullptr) return VC_ERR_INVALID_ARG;
    return c->stream_stop(stream_id);
}

vc_result vc_set_input_device(vc_client* c, uint32_t stream_id, const char* device_id) {
    if (c == nullptr) return VC_ERR_INVALID_ARG;
    return c->set_input_device(stream_id, device_id);
}

vc_result vc_set_input_mode(vc_client* c, vc_input_mode mode) {
    if (c == nullptr) return VC_ERR_INVALID_ARG;
    return c->set_input_mode(mode);
}

vc_result vc_set_push_to_talk(vc_client* c, int active) {
    if (c == nullptr) return VC_ERR_INVALID_ARG;
    return c->set_push_to_talk(active != 0);
}

vc_result vc_set_self_mute(vc_client* c, int mic_muted, int deafened) {
    if (c == nullptr) return VC_ERR_INVALID_ARG;
    return c->set_self_mute(mic_muted != 0, deafened != 0);
}

vc_result vc_set_remote_stream(vc_client* c, uint32_t user_id, uint32_t stream_id, float gain,
                               int muted, int noise_reduction) {
    if (c == nullptr) return VC_ERR_INVALID_ARG;
    return c->set_remote_stream(user_id, stream_id, gain, muted != 0, noise_reduction != 0);
}

vc_result vc_send_text(vc_client* c, vc_text_scope scope, uint32_t target_id,
                       const char* utf8) {
    if (c == nullptr || utf8 == nullptr) return VC_ERR_INVALID_ARG;
    return c->send_text(scope, target_id, utf8);
}

vc_result vc_list_devices(vc_client* c, vc_device_kind kind, vc_device_list* out) {
    if (c == nullptr || out == nullptr) return VC_ERR_INVALID_ARG;
    return c->list_devices(kind, out);
}

void vc_free_device_list(vc_device_list* list) {
    if (list == nullptr) return;
    /* Stub: no allocation yet. Real impl frees list->items here. */
    list->items = nullptr;
    list->count = 0;
}

}  // extern "C"