/*
 * voicecat.cpp — C ABI implementation.
 *
 * Lifecycle (create/destroy) and trivial accessors are always real. Everything else below
 * just delegates to vc_client (core/src/core/client.cpp): under VOICECAT_HAS_NET
 * (`dev`/`release`/`server-release` — see docs/building.md) that's the real M1–M3 implementation;
 * under the no-deps `skeleton` preset, client.cpp's `#else` branch returns VC_ERR_NOT_IMPLEMENTED
 * for all of it, to keep that skeleton build green.
 */
#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 vc_client (real or stub, per preset above). ───────── */

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_vad_threshold(vc_client* c, float threshold) {
    if (c == nullptr) return VC_ERR_INVALID_ARG;
    return c->set_vad_threshold(threshold);
}

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_output_volume(vc_client* c, float gain) {
    if (c == nullptr) return VC_ERR_INVALID_ARG;
    return c->set_output_volume(gain);
}

vc_result vc_set_input_gain(vc_client* c, float gain) {
    if (c == nullptr) return VC_ERR_INVALID_ARG;
    return c->set_input_gain(gain);
}

vc_result vc_set_input_noise_reduction(vc_client* c, int enable) {
    if (c == nullptr) return VC_ERR_INVALID_ARG;
    return c->set_input_noise_reduction(enable != 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_get_remote_stream(vc_client* c, uint32_t user_id, uint32_t stream_id,
                               vc_remote_stream_state* out) {
    if (c == nullptr) return VC_ERR_INVALID_ARG;
    return c->get_remote_stream(user_id, stream_id, out);
}

vc_result vc_get_stream_audio_config(vc_client* c, uint32_t user_id, uint32_t stream_id,
                                     vc_audio_config* out) {
    if (c == nullptr || out == nullptr) return VC_ERR_INVALID_ARG;
    return c->get_stream_audio_config(user_id, stream_id, out);
}

vc_result vc_test_inject_capture(vc_client* c, uint32_t stream_id, const int16_t* pcm,
                                 size_t samples) {
    if (c == nullptr || pcm == nullptr) return VC_ERR_INVALID_ARG;
    return c->stream_feed_pcm(stream_id, pcm, samples, 1);
}

vc_result vc_stream_feed_pcm(vc_client* c, uint32_t stream_id, const int16_t* pcm,
                              size_t samples_per_channel, uint32_t channels) {
    if (c == nullptr || pcm == nullptr) return VC_ERR_INVALID_ARG;
    if (channels != 1 && channels != 2) return VC_ERR_INVALID_ARG;
    return c->stream_feed_pcm(stream_id, pcm, samples_per_channel, channels);
}

vc_result vc_set_pcm_sink(vc_client* c, vc_pcm_sink_cb cb, void* user) {
    if (c == nullptr) return VC_ERR_INVALID_ARG;
    return c->set_pcm_sink(cb, user);
}

vc_result vc_set_mixed_output_sink(vc_client* c, vc_mixed_output_cb cb, void* user) {
    if (c == nullptr) return VC_ERR_INVALID_ARG;
    return c->set_mixed_output_sink(cb, user);
}

vc_result vc_set_external_playback(vc_client* c, int enable) {
    if (c == nullptr) return VC_ERR_INVALID_ARG;
    return c->set_external_playback(enable != 0);
}

vc_result vc_set_capture_channels(vc_client* c, uint32_t stream_id, uint32_t channels) {
    if (c == nullptr) return VC_ERR_INVALID_ARG;
    return c->set_capture_channels(stream_id, channels);
}

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 || list->items == nullptr) return;
    for (size_t i = 0; i < list->count; ++i) {
        delete[] list->items[i].id;
        delete[] list->items[i].name;
    }
    delete[] list->items;
    list->items = nullptr;
    list->count = 0;
}

vc_result vc_list_channels(vc_client* c, vc_channel_list* out) {
    if (c == nullptr || out == nullptr) return VC_ERR_INVALID_ARG;
    return c->list_channels(out);
}

void vc_free_channel_list(vc_channel_list* list) {
    if (list == nullptr || list->items == nullptr) return;
    for (size_t i = 0; i < list->count; ++i) {
        delete[] list->items[i].name;
        delete[] list->items[i].topic;
    }
    delete[] list->items;
    list->items = nullptr;
    list->count = 0;
}

vc_result vc_list_users(vc_client* c, vc_user_list* out) {
    if (c == nullptr || out == nullptr) return VC_ERR_INVALID_ARG;
    return c->list_users(out);
}

void vc_free_user_list(vc_user_list* list) {
    if (list == nullptr || list->items == nullptr) return;
    for (size_t i = 0; i < list->count; ++i) delete[] list->items[i].nickname;
    delete[] list->items;
    list->items = nullptr;
    list->count = 0;
}

vc_result vc_list_user_streams(vc_client* c, uint32_t user_id, vc_stream_summary_list* out) {
    if (c == nullptr || out == nullptr) return VC_ERR_INVALID_ARG;
    return c->list_user_streams(user_id, out);
}

void vc_free_stream_summary_list(vc_stream_summary_list* list) {
    if (list == nullptr || list->items == nullptr) return;
    for (size_t i = 0; i < list->count; ++i) delete[] list->items[i].label;
    delete[] list->items;
    list->items = nullptr;
    list->count = 0;
}

vc_result vc_confirm_server_identity(vc_client* c, int accept) {
    if (c == nullptr) return VC_ERR_INVALID_ARG;
    return c->confirm_server_identity(accept != 0);
}

vc_result vc_get_server_identity_display(vc_client* c, char* out_buf, size_t buf_cap,
                                          size_t* out_len) {
    if (c == nullptr) return VC_ERR_INVALID_ARG;
    return c->get_server_identity_display(out_buf, buf_cap, out_len);
}

vc_result vc_kick_user(vc_client* c, uint32_t user_id, const char* reason) {
    if (c == nullptr) return VC_ERR_INVALID_ARG;
    return c->kick_user(user_id, reason);
}

vc_result vc_ban_user(vc_client* c, uint32_t user_id, const char* reason,
                       uint64_t expires_unix_ms) {
    if (c == nullptr) return VC_ERR_INVALID_ARG;
    return c->ban_user(user_id, reason, expires_unix_ms);
}

vc_result vc_set_permission(vc_client* c, uint32_t user_id, const vc_permissions* perms) {
    if (c == nullptr || perms == nullptr) return VC_ERR_INVALID_ARG;
    return c->set_permission(user_id, perms);
}

vc_result vc_set_server_mute(vc_client* c, uint32_t user_id, int muted, int deafened) {
    if (c == nullptr) return VC_ERR_INVALID_ARG;
    return c->set_server_mute(user_id, muted != 0, deafened != 0);
}

vc_result vc_move_user(vc_client* c, uint32_t user_id, uint32_t channel_id) {
    if (c == nullptr) return VC_ERR_INVALID_ARG;
    return c->move_user(user_id, channel_id);
}

vc_result vc_create_channel(vc_client* c, const vc_channel_info* info) {
    if (c == nullptr || info == nullptr) return VC_ERR_INVALID_ARG;
    return c->create_channel(info);
}

vc_result vc_edit_channel(vc_client* c, const vc_channel_info* info) {
    if (c == nullptr || info == nullptr) return VC_ERR_INVALID_ARG;
    return c->edit_channel(info);
}

vc_result vc_delete_channel(vc_client* c, uint32_t channel_id) {
    if (c == nullptr) return VC_ERR_INVALID_ARG;
    return c->delete_channel(channel_id);
}

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

vc_result vc_reset_password(vc_client* c, const char* username, const char* new_password) {
    if (c == nullptr || username == nullptr || new_password == nullptr) return VC_ERR_INVALID_ARG;
    return c->reset_password(username, new_password);
}

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

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

vc_result vc_get_account_list(vc_client* c, vc_account_list* out) {
    if (c == nullptr || out == nullptr) return VC_ERR_INVALID_ARG;
    return c->get_account_list(out);
}

void vc_free_account_list(vc_account_list* list) {
    if (list == nullptr || list->items == nullptr) return;
    for (size_t i = 0; i < list->count; ++i) delete[] list->items[i].username;
    delete[] list->items;
    list->items = nullptr;
    list->count = 0;
}

vc_result vc_get_permissions(vc_client* c, vc_permissions* out) {
    if (c == nullptr || out == nullptr) return VC_ERR_INVALID_ARG;
    return c->get_permissions(out);
}

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

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

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

}  // extern "C"
