#include "nerv/lib/common.h"
#include "nerv/matrix/matrix.h"
#include "cwrapper_kaldi.h"
#include <stdio.h>

const char *nerv_kaldi_feat_repo_tname = "nerv.KaldiFeatureRepo";
const char *nerv_kaldi_lookup_feat_repo_tname = "nerv.KaldiLookupFeatureRepo";
const char *nerv_kaldi_label_repo_tname = "nerv.KaldiLabelRepo";
const char *nerv_matrix_host_float_tname = "nerv.MMatrixFloat";

static int feat_repo_new(lua_State *L) {
    const char *feature_rsepcifier = luaL_checkstring(L, 1);
    KaldiFeatureRepo *repo = kaldi_feature_repo_new(feature_rsepcifier);
    luaT_pushudata(L, repo, nerv_kaldi_feat_repo_tname);
    return 1;
}

static int feat_repo_destroy(lua_State *L) {
    KaldiFeatureRepo *repo = luaT_checkudata(L, 1, nerv_kaldi_feat_repo_tname);
    kaldi_feature_repo_destroy(repo);
    return 0;
}

static int feat_repo_current_utterance(lua_State *L) {
    MContext *context;
    MMATRIX_GET_CONTEXT(L, 3);
    KaldiFeatureRepo *repo = luaT_checkudata(L, 1, nerv_kaldi_feat_repo_tname);
    int debug;
    if (!lua_isboolean(L, 2))
        nerv_error(L, "debug flag should be a boolean");
    debug = lua_toboolean(L, 2);
    Matrix *utter = kaldi_feature_repo_read_utterance(repo, L, debug, context);
    luaT_pushudata(L, utter, nerv_matrix_host_float_tname);
    return 1;
}

static int feat_repo_next(lua_State *L) {
    KaldiFeatureRepo *repo = luaT_checkudata(L, 1, nerv_kaldi_feat_repo_tname);
    kaldi_feature_repo_next(repo);
    return 0;
}

static int feat_repo_is_end(lua_State *L) {
    KaldiFeatureRepo *repo = luaT_checkudata(L, 1, nerv_kaldi_feat_repo_tname);
    lua_pushboolean(L, kaldi_feature_repo_is_end(repo));
    return 1;
}

static int feat_repo_key(lua_State *L) {
    KaldiFeatureRepo *repo = luaT_checkudata(L, 1, nerv_kaldi_feat_repo_tname);
    lua_pushstring(L, kaldi_feature_repo_key(repo));
    return 1;
}

static const luaL_Reg feat_repo_methods[] = {
    {"cur_utter", feat_repo_current_utterance},
    {"next", feat_repo_next},
    {"is_end", feat_repo_is_end},
    {"key", feat_repo_key},
    {NULL, NULL}
};

static int lookup_feat_repo_new(lua_State *L) {
    const char *feature_rsepcifier = luaL_checkstring(L, 1);
    const char *map_rspecifier = luaL_checkstring(L, 2);
    KaldiLookupFeatureRepo *repo = kaldi_lookup_feature_repo_new(feature_rsepcifier, map_rspecifier);
    luaT_pushudata(L, repo, nerv_kaldi_lookup_feat_repo_tname);
    return 1;
}

static int lookup_feat_repo_destroy(lua_State *L) {
    KaldiLookupFeatureRepo *repo = luaT_checkudata(L, 1, nerv_kaldi_lookup_feat_repo_tname);
    kaldi_lookup_feature_repo_destroy(repo);
    return 0;
}

static int lookup_feat_repo_read_utterance(lua_State *L) {
    MContext *context;
    MMATRIX_GET_CONTEXT(L, 5);
    KaldiLookupFeatureRepo *repo = luaT_checkudata(L, 1, nerv_kaldi_lookup_feat_repo_tname);
    KaldiFeatureRepo *feat_repo = luaT_checkudata(L, 2, nerv_kaldi_feat_repo_tname);
    int nframes, debug;
    if (!lua_isnumber(L, 3))
        nerv_error(L, "nframes should be a number");
    nframes = lua_tonumber(L, 3);
    if (!lua_isboolean(L, 4))
        nerv_error(L, "debug flag should be a boolean");
    debug = lua_toboolean(L, 4);
    Matrix *utter = kaldi_lookup_feature_repo_read_utterance(repo, feat_repo,
                                                            nframes, L, debug, context);
    luaT_pushudata(L, utter, nerv_matrix_host_float_tname);
    return 1;
}

static const luaL_Reg lookup_feat_repo_methods[] = {
    {"get_utter", lookup_feat_repo_read_utterance},
    {NULL, NULL}
};

static int label_repo_new(lua_State *L) {
    const char *targets_rspecifier = luaL_checkstring(L, 1);
    KaldiLabelRepo *repo = kaldi_label_repo_new(targets_rspecifier);
    luaT_pushudata(L, repo, nerv_kaldi_label_repo_tname);
    return 1;
}

static int label_repo_read_utterance(lua_State *L) {
    MContext *context;
    MMATRIX_GET_CONTEXT(L, 5);
    KaldiLabelRepo *repo = luaT_checkudata(L, 1, nerv_kaldi_label_repo_tname);
    KaldiFeatureRepo *feat_repo = luaT_checkudata(L, 2, nerv_kaldi_feat_repo_tname);
    int nframes, debug;
    if (!lua_isnumber(L, 3))
        nerv_error(L, "nframes should be a number");
    nframes = lua_tonumber(L, 3);
    if (!lua_isboolean(L, 4))
        nerv_error(L, "debug flag should be a boolean");
    debug = lua_toboolean(L, 4);
    Matrix *utter = kaldi_label_repo_read_utterance(repo, feat_repo, nframes,
                                                    L, debug, context);
    luaT_pushudata(L, utter, nerv_matrix_host_float_tname);
    return 1;
}

static int label_repo_destroy(lua_State *L) {
    KaldiLabelRepo *repo = luaT_checkudata(L, 1, nerv_kaldi_label_repo_tname);
    kaldi_label_repo_destroy(repo);
    return 0;
}

static const luaL_Reg label_repo_methods[] = {
    {"get_utter", label_repo_read_utterance},
    {NULL, NULL}
};

static void feat_repo_init(lua_State *L) {
    luaT_newmetatable(L, nerv_kaldi_feat_repo_tname, NULL,
                        feat_repo_new, feat_repo_destroy, NULL);
    luaL_register(L, NULL, feat_repo_methods);
    lua_pop(L, 1);
}

static void lookup_feat_repo_init(lua_State *L) {
    luaT_newmetatable(L, nerv_kaldi_lookup_feat_repo_tname, NULL,
                        lookup_feat_repo_new, lookup_feat_repo_destroy, NULL);
    luaL_register(L, NULL, lookup_feat_repo_methods);
    lua_pop(L, 1);
}

static void label_repo_init(lua_State *L) {
    luaT_newmetatable(L, nerv_kaldi_label_repo_tname, NULL,
                        label_repo_new, label_repo_destroy, NULL);
    luaL_register(L, NULL, label_repo_methods);
    lua_pop(L, 1);
}

void kaldi_io_init(lua_State *L) {
    feat_repo_init(L);
    lookup_feat_repo_init(L);
    label_repo_init(L);
}