#ifdef NERV_GENERIC_MATRIX
#include "../matrix.h"
#include "../../lib/matrix/generic/matrix.h"
#include "../../lib/common.h"

extern const char *nerv_matrix_(tname);
extern const char *MATRIX_BASE_TNAME;

int nerv_matrix_(lua_new)(lua_State *L) {
    Status status;
    MATRIX_CONTEXT *context;
    MATRIX_GET_CONTEXT(L, 3);
    Matrix *self = nerv_matrix_(create)(luaL_checkinteger(L, 1),
                                        luaL_checkinteger(L, 2),
                                        context, &status);
    NERV_LUA_CHECK_STATUS(L, status);
    luaT_pushudata(L, self, nerv_matrix_(tname));
    return 1;
}

int nerv_matrix_(lua_destroy)(lua_State *L) {
    Status status;
    MATRIX_CONTEXT *context;
    MATRIX_GET_CONTEXT(L, 2);
    Matrix *self = luaT_checkudata(L, 1, nerv_matrix_(tname));
    nerv_matrix_(destroy)(self, context, &status);
    NERV_LUA_CHECK_STATUS(L, status);
    return 1;
}

int nerv_matrix_(lua_get_elem)(lua_State *L);
int nerv_matrix_(lua_set_elem)(lua_State *L);

static int nerv_matrix_(lua_newindex)(lua_State *L) {
    Matrix *self = luaT_checkudata(L, 1, nerv_matrix_(tname));
    if (lua_isnumber(L, 2))
    {
        int idx = luaL_checkinteger(L, 2);
        if (self->dim == 1)
        {
            if (idx < 0 || idx >= self->ncol)
                nerv_error(L, "index must be within range [0, %d)", self->ncol);
            MATRIX_DATA_WRITE(L, MATRIX_ELEM_PTR(self), idx,
                                luaL_checknumber(L, 3));
        }
        else
            nerv_error(L, "cannot assign to row vector");
        lua_pushboolean(L, 1);
        return 1;
    }
    else
    {
        lua_pushboolean(L, 0);
        return 1;
    }
}


static int nerv_matrix_(lua_index)(lua_State *L) {
    Status status;
    Matrix *self = luaT_checkudata(L, 1, nerv_matrix_(tname));
    if (lua_isnumber(L, 2))
    {
        int idx = luaL_checkinteger(L, 2);
        if (self->dim == 1)
        {
            if (idx < 0 || idx >= self->ncol)
                nerv_error(L, "index must be within range [0, %d)", self->ncol);
            lua_pushnumber(L, MATRIX_DATA_READ(L, MATRIX_ELEM_PTR(self), idx));
        }
        else
        {
            if (idx < 0 || idx >= self->nrow)
                nerv_error(L, "index must be within range [0, %d)", self->nrow);
            luaT_pushudata(L, nerv_matrix_(getrow)(self, idx),
                                nerv_matrix_(tname));
        }
        lua_pushboolean(L, 1);
        return 2;
    }
    else
    {
        lua_pushboolean(L, 0);
        return 1;
    }
}

static int nerv_matrix_(lua_ncol)(lua_State *L) {
    Matrix *self = luaT_checkudata(L, 1, nerv_matrix_(tname));
    lua_pushinteger(L, self->ncol);
    return 1;
}

static int nerv_matrix_(lua_dim)(lua_State *L) {
    Matrix *self = luaT_checkudata(L, 1, nerv_matrix_(tname));
    lua_pushinteger(L, self->dim);
    return 1;
}

static int nerv_matrix_(lua_nrow)(lua_State *L) {
    Matrix *self = luaT_checkudata(L, 1, nerv_matrix_(tname));
    lua_pushinteger(L, self->nrow);
    return 1;
}

static int nerv_matrix_(lua_get_dataref_value)(lua_State *L) {
    Matrix *self = luaT_checkudata(L, 1, nerv_matrix_(tname));
    lua_pushinteger(L, *(self->data_ref));
    return 1;
}

static const luaL_Reg nerv_matrix_(methods)[] = {
    {"get_elem", nerv_matrix_(lua_get_elem)},
    {"set_elem", nerv_matrix_(lua_set_elem)},
    {"ncol", nerv_matrix_(lua_ncol)},
    {"nrow", nerv_matrix_(lua_nrow)},
    {"dim", nerv_matrix_(lua_dim)},
    {"get_dataref_value", nerv_matrix_(lua_get_dataref_value)},
    {"__index__", nerv_matrix_(lua_index)},
    {"__newindex__", nerv_matrix_(lua_newindex)},
    {NULL, NULL}
};

void nerv_matrix_(lua_init)(lua_State *L) {
    luaT_newmetatable(L, nerv_matrix_(tname), MATRIX_BASE_TNAME,
                        nerv_matrix_(lua_new), nerv_matrix_(lua_destroy), NULL);
    luaL_register(L, NULL, nerv_matrix_(methods));
#ifdef MATRIX_INIT
    MATRIX_INIT(L);
#endif
    lua_pop(L, 1);
}

static int nerv_matrix_(lua_add)(lua_State *L) {
    Status status;
    MATRIX_CONTEXT *context;
    MATRIX_GET_CONTEXT(L, 6);
    Matrix *c = luaT_checkudata(L, 1, nerv_matrix_(tname));
    const Matrix *a = luaT_checkudata(L, 2, nerv_matrix_(tname));
    const Matrix *b = luaT_checkudata(L, 3, nerv_matrix_(tname));
    MATRIX_ELEM alpha = luaL_checknumber(L, 4);
    MATRIX_ELEM beta = luaL_checknumber(L, 5);
    nerv_matrix_(add)(c, a, b, alpha, beta, context, &status);
    NERV_LUA_CHECK_STATUS(L, status);
    return 0;
}

static int nerv_matrix_(lua_mul)(lua_State *L) {
    Status status;
    MATRIX_CONTEXT *context;
    MATRIX_GET_CONTEXT(L, 8);
    Matrix *c = luaT_checkudata(L, 1, nerv_matrix_(tname));
    Matrix *a = luaT_checkudata(L, 2, nerv_matrix_(tname));
    Matrix *b = luaT_checkudata(L, 3, nerv_matrix_(tname));
    MATRIX_ELEM alpha = luaL_checknumber(L, 4);
    MATRIX_ELEM beta = luaL_checknumber(L, 5);
    int nargs = lua_gettop(L);
    int ta = nargs > 5 ? nerv_matrix_(lua_get_blas_op)(*luaL_checkstring(L, 6)) \
                            : BLAS_OP_N;
    int tb = nargs > 6 ? nerv_matrix_(lua_get_blas_op)(*luaL_checkstring(L, 7)) \
                            : BLAS_OP_N;
    nerv_matrix_(mul)(c, a, b, alpha, beta, ta, tb, context, &status);
    NERV_LUA_CHECK_STATUS(L, status);
    return 0;
}

static int nerv_matrix_(lua_sigmoid)(lua_State *L) {
    Status status;
    MATRIX_CONTEXT *context;
    MATRIX_GET_CONTEXT(L, 3);
    Matrix *a = luaT_checkudata(L, 1, nerv_matrix_(tname));
    Matrix *b = luaT_checkudata(L, 2, nerv_matrix_(tname));
    nerv_matrix_(sigmoid)(a, b, context, &status);
    NERV_LUA_CHECK_STATUS(L, status);
    return 0;
}

static int nerv_matrix_(lua_sigmoid_grad)(lua_State *L) {
    Status status;
    MATRIX_CONTEXT *context;
    MATRIX_GET_CONTEXT(L, 4);
    Matrix *nerr = luaT_checkudata(L, 1, nerv_matrix_(tname));
    Matrix *err = luaT_checkudata(L, 2, nerv_matrix_(tname));
    Matrix *output = luaT_checkudata(L, 3, nerv_matrix_(tname));
    nerv_matrix_(sigmoid_grad)(nerr, err, output, context, &status);
    NERV_LUA_CHECK_STATUS(L, status);
    return 0;
}

static int nerv_matrix_(lua_softmax)(lua_State *L) {
    Status status;
    MATRIX_CONTEXT *context;
    MATRIX_GET_CONTEXT(L, 3);
    Matrix *a = luaT_checkudata(L, 2, nerv_matrix_(tname));
    Matrix *b = luaT_checkudata(L, 1, nerv_matrix_(tname));
    Matrix *max_idx = nerv_matrix_(softmax)(b, a, context, &status);
    NERV_LUA_CHECK_STATUS(L, status);
    luaT_pushudata(L, max_idx, nerv_matrix_(tname));
    return 1;
}

static int nerv_matrix_(lua_rowsum)(lua_State *L) {
    Status status;
    MATRIX_CONTEXT *context;
    MATRIX_GET_CONTEXT(L, 2);
    Matrix *a = luaT_checkudata(L, 1, nerv_matrix_(tname));
    Matrix *b = nerv_matrix_(rowsum)(a, context, &status);
    NERV_LUA_CHECK_STATUS(L, status);
    luaT_pushudata(L, b, nerv_matrix_(tname));
    return 1;
}

static int nerv_matrix_(lua_colsum)(lua_State *L) {
    Status status;
    MATRIX_CONTEXT *context;
    MATRIX_GET_CONTEXT(L, 2);
    Matrix *a = luaT_checkudata(L, 1, nerv_matrix_(tname));
    Matrix *b = nerv_matrix_(colsum)(a, context, &status);
    NERV_LUA_CHECK_STATUS(L, status);
    luaT_pushudata(L, b, nerv_matrix_(tname));
    return 1;
}

static int nerv_matrix_(lua_colsame)(lua_State *L) {
    Status status;
    MATRIX_CONTEXT *context;
    MATRIX_GET_CONTEXT(L, 3);
    Matrix *a = luaT_checkudata(L, 1, nerv_matrix_(tname));
    const Matrix *ref = luaT_checkudata(L, 2, nerv_matrix_(tname));
    Matrix *b = nerv_matrix_(colsame)(a, ref, context, &status);
    NERV_LUA_CHECK_STATUS(L, status);
    luaT_pushudata(L, b, nerv_matrix_(tname));
    return 1;
}

static int nerv_matrix_(lua_rowmax)(lua_State *L) {
    Status status;
    MATRIX_CONTEXT *context;
    MATRIX_GET_CONTEXT(L, 2);
    Matrix *a = luaT_checkudata(L, 1, nerv_matrix_(tname));
    Matrix *b = nerv_matrix_(rowmax)(a, context, &status);
    NERV_LUA_CHECK_STATUS(L, status);
    luaT_pushudata(L, b, nerv_matrix_(tname));
    return 1;
}

static int nerv_matrix_(lua_rowmax_idx)(lua_State *L) {
    Status status;
    MATRIX_CONTEXT *context;
    MATRIX_GET_CONTEXT(L, 2);
    Matrix *a = luaT_checkudata(L, 1, nerv_matrix_(tname));
    Matrix *b;
    Matrix *idx;
    nerv_matrix_(rowmax_idx)(a, &b, &idx, context, &status);
    NERV_LUA_CHECK_STATUS(L, status);
    luaT_pushudata(L, b, nerv_matrix_(tname));
    luaT_pushudata(L, idx, nerv_matrix_(tname));
    return 2;
}

static int nerv_matrix_(lua_add_row)(lua_State *L) {
    Status status;
    MATRIX_CONTEXT *context;
    MATRIX_GET_CONTEXT(L, 4);
    const Matrix *a = luaT_checkudata(L, 2, nerv_matrix_(tname));
    Matrix *b = luaT_checkudata(L, 1, nerv_matrix_(tname));
    double beta = luaL_checknumber(L, 3);
    nerv_matrix_(add_row)(b, a, beta, context, &status);
    NERV_LUA_CHECK_STATUS(L, status);
    return 0;
}

static int nerv_matrix_(lua_fill)(lua_State *L) {
    Status status;
    MATRIX_CONTEXT *context;
    MATRIX_GET_CONTEXT(L, 3);
    Matrix *self = luaT_checkudata(L, 1, nerv_matrix_(tname));
    double val = luaL_checknumber(L, 2);
    nerv_matrix_(fill)(self, val, context, &status);
    NERV_LUA_CHECK_STATUS(L, status);
    return 0;
}

static int nerv_matrix_(lua_clip)(lua_State *L) {
    Status status;
    MATRIX_CONTEXT *context;
    MATRIX_GET_CONTEXT(L, 4);
    Matrix *self = luaT_checkudata(L, 1, nerv_matrix_(tname));
    double val1 = luaL_checknumber(L, 2);
    double val2 = luaL_checknumber(L, 3);
    nerv_matrix_(clip)(self, val1, val2, context, &status);
    NERV_LUA_CHECK_STATUS(L, status);
    return 0;
}

static int nerv_matrix_(lua_trans)(lua_State *L) {
    Status status;
    MATRIX_CONTEXT *context;
    MATRIX_GET_CONTEXT(L, 2);
    Matrix *a = luaT_checkudata(L, 1, nerv_matrix_(tname));
    Matrix *b = nerv_matrix_(trans)(a, context, &status);
    NERV_LUA_CHECK_STATUS(L, status);
    luaT_pushudata(L, b, nerv_matrix_(tname));
    return 1;
}

static int nerv_matrix_(lua_mul_elem)(lua_State *L) {
    Status status;
    MATRIX_CONTEXT *context;
    MATRIX_GET_CONTEXT(L, 4);
    const Matrix *a = luaT_checkudata(L, 2, nerv_matrix_(tname));
    const Matrix *b = luaT_checkudata(L, 3, nerv_matrix_(tname));
    Matrix *c = luaT_checkudata(L, 1, nerv_matrix_(tname));
    nerv_matrix_(mul_elem)(c, a, b, context, &status);
    NERV_LUA_CHECK_STATUS(L, status);
    return 0;
}

static int nerv_matrix_(lua_log_elem)(lua_State *L) {
    Status status;
    MATRIX_CONTEXT *context;
    MATRIX_GET_CONTEXT(L, 3);
    const Matrix *a = luaT_checkudata(L, 2, nerv_matrix_(tname));
    Matrix *b = luaT_checkudata(L, 1, nerv_matrix_(tname));
    nerv_matrix_(log_elem)(b, a, context, &status);
    NERV_LUA_CHECK_STATUS(L, status);
    return 0;
}

static int nerv_matrix_(lua_decompress)(lua_State *L) {
    Status status;
    MATRIX_CONTEXT *context;
    MATRIX_GET_CONTEXT(L, 3);
    const Matrix *a = luaT_checkudata(L, 1, nerv_matrix_(tname));
    int orig_col = luaL_checkinteger(L, 2);
    Matrix *b = nerv_matrix_(decompress)(a, orig_col, context, &status);
    NERV_LUA_CHECK_STATUS(L, status);
    luaT_pushudata(L, b, nerv_matrix_(tname));
    return 1;
}

static int nerv_matrix_(lua_expand_frm)(lua_State *L) {
    Status status;
    MATRIX_CONTEXT *context;
    MATRIX_GET_CONTEXT(L, 4);
    Matrix *a = luaT_checkudata(L, 1, nerv_matrix_(tname));
    const Matrix *b = luaT_checkudata(L, 2, nerv_matrix_(tname));
    int cont = luaL_checkinteger(L, 3);
    nerv_matrix_(expand_frm)(a, b, cont, context, &status);
    NERV_LUA_CHECK_STATUS(L, status);
    return 0;
}

static int nerv_matrix_(lua_rearrange_frm)(lua_State *L) {
    Status status;
    MATRIX_CONTEXT *context;
    MATRIX_GET_CONTEXT(L, 4);
    Matrix *a = luaT_checkudata(L, 1, nerv_matrix_(tname));
    const Matrix *b = luaT_checkudata(L, 2, nerv_matrix_(tname));
    int step = luaL_checkinteger(L, 3);
    nerv_matrix_(rearrange_frm)(a, b, step, context, &status);
    NERV_LUA_CHECK_STATUS(L, status);
    return 0;
}

static int nerv_matrix_(lua_scale_rows_by_col)(lua_State *L) {
    Status status;
    MATRIX_CONTEXT *context;
    MATRIX_GET_CONTEXT(L, 3);
    Matrix *a = luaT_checkudata(L, 1, nerv_matrix_(tname));
    const Matrix *b = luaT_checkudata(L, 2, nerv_matrix_(tname));
    nerv_matrix_(scale_rows_by_col)(a, b, context, &status);
    NERV_LUA_CHECK_STATUS(L, status);
    return 0;
}

static int nerv_matrix_(lua_scale_rows_by_row)(lua_State *L) {
    Status status;
    MATRIX_CONTEXT *context;
    MATRIX_GET_CONTEXT(L, 3);
    Matrix *a = luaT_checkudata(L, 1, nerv_matrix_(tname));
    const Matrix *b = luaT_checkudata(L, 2, nerv_matrix_(tname));
    nerv_matrix_(scale_rows_by_row)(a, b, context, &status);
    NERV_LUA_CHECK_STATUS(L, status);
    return 0;
}

static int nerv_matrix_(lua_diagonalize)(lua_State *L) {
    Status status;
    MATRIX_CONTEXT *context;
    MATRIX_GET_CONTEXT(L, 2);
    Matrix *a = luaT_checkudata(L, 1, nerv_matrix_(tname));
    nerv_matrix_(diagonalize)(a, context, &status);
    NERV_LUA_CHECK_STATUS(L, status);
    return 0;
}

static int nerv_matrix_(lua_set_values_by_mask)(lua_State *L) {
    Status status;
    MATRIX_CONTEXT *context;
    MATRIX_GET_CONTEXT(L, 4);
    Matrix *a = luaT_checkudata(L, 1, nerv_matrix_(tname));
    Matrix *mask = luaT_checkudata(L, 2, nerv_matrix_(tname));
    double val = luaL_checknumber(L, 3);
    nerv_matrix_(set_values_by_mask)(a, mask, val, context, &status);
    NERV_LUA_CHECK_STATUS(L, status);
    return 0;
}

static int nerv_matrix_(lua_tanh)(lua_State *L) {
    Status status;
    MATRIX_CONTEXT *context;
    MATRIX_GET_CONTEXT(L, 3);
    Matrix *a = luaT_checkudata(L, 1, nerv_matrix_(tname));
    Matrix *b = luaT_checkudata(L, 2, nerv_matrix_(tname));
    nerv_matrix_(tanh)(a, b, context, &status);
    NERV_LUA_CHECK_STATUS(L, status);
    return 0;
}

static int nerv_matrix_(lua_tanh_grad)(lua_State *L) {
    Status status;
    MATRIX_CONTEXT *context;
    MATRIX_GET_CONTEXT(L, 4);
    Matrix *nerr = luaT_checkudata(L, 1, nerv_matrix_(tname));
    Matrix *err = luaT_checkudata(L, 2, nerv_matrix_(tname));
    Matrix *output = luaT_checkudata(L, 3, nerv_matrix_(tname));
    nerv_matrix_(tanh_grad)(nerr, err, output, context, &status);
    NERV_LUA_CHECK_STATUS(L, status);
    return 0;
}

#endif