#!/usr/bin/env python
################################################################################
# Copyright 2018-2023 Intel Corporation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
################################################################################

from __future__ import print_function

import os
import re
import sys
import datetime
import xml.etree.ElementTree as ET


def banner(year_from):
    year_now = str(datetime.datetime.now().year)
    banner_year = (
        year_from if year_now == year_from else "%s-%s" % (year_from, year_now)
    )
    return """\
/*******************************************************************************
* Copyright %s Intel Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*******************************************************************************/

// DO NOT EDIT, AUTO-GENERATED
// Use this script to update the file: scripts/%s

// clang-format off

""" % (
        banner_year,
        os.path.basename(__file__),
    )


def template(body, year_from):
    return "%s%s" % (banner(year_from), body)


def header(body):
    return (
        """\
#ifndef ONEAPI_DNNL_DNNL_DEBUG_H
#define ONEAPI_DNNL_DNNL_DEBUG_H

/// @file
/// Debug capabilities

#include "oneapi/dnnl/dnnl_config.h"
#include "oneapi/dnnl/dnnl_types.h"

#ifdef __cplusplus
extern "C" {
#endif

%s
const char DNNL_API *dnnl_runtime2str(unsigned v);
const char DNNL_API *dnnl_fmt_kind2str(dnnl_format_kind_t v);

#ifdef __cplusplus
}
#endif

#endif
"""
        % body
    )


def source(body):
    return (
        """\
#include <assert.h>

#include "oneapi/dnnl/dnnl_debug.h"
#include "oneapi/dnnl/dnnl_types.h"

%s
"""
        % body
    )


def header_benchdnn(body):
    return (
        """\
#ifndef DNNL_DEBUG_HPP
#define DNNL_DEBUG_HPP

#include "oneapi/dnnl/dnnl.h"

%s
/* status */
const char *status2str(dnnl_status_t status);

/* data type */
const char *dt2str(dnnl_data_type_t dt);

/* format */
const char *fmt_tag2str(dnnl_format_tag_t tag);

/* encoding */
#ifdef DNNL_EXPERIMENTAL_SPARSE
const char *sparse_encoding2str(dnnl_sparse_encoding_t encoding);
#endif

/* engine kind */
const char *engine_kind2str(dnnl_engine_kind_t kind);

/* scratchpad mode */
const char *scratchpad_mode2str(dnnl_scratchpad_mode_t mode);

/* fpmath mode */
const char *fpmath_mode2str(dnnl_fpmath_mode_t mode);

#endif
"""
        % body
    )


def source_benchdnn(body):
    return (
        """\
#include <assert.h>
#include <stdio.h>
#include <string.h>

#include "oneapi/dnnl/dnnl_debug.h"

#include "dnnl_debug.hpp"

#include "src/common/z_magic.hpp"

%s

const char *status2str(dnnl_status_t status) {
    return dnnl_status2str(status);
}

const char *dt2str(dnnl_data_type_t dt) {
    return dnnl_dt2str(dt);
}

const char *fmt_tag2str(dnnl_format_tag_t tag) {
    return dnnl_fmt_tag2str(tag);
}

#ifdef DNNL_EXPERIMENTAL_SPARSE
const char *sparse_encoding2str(dnnl_sparse_encoding_t encoding) {
    return dnnl_sparse_encoding2str(encoding);
}
#endif

const char *engine_kind2str(dnnl_engine_kind_t kind) {
    return dnnl_engine_kind2str(kind);
}

const char *scratchpad_mode2str(dnnl_scratchpad_mode_t mode) {
    return dnnl_scratchpad_mode2str(mode);
}

const char *fpmath_mode2str(dnnl_fpmath_mode_t mode) {
    return dnnl_fpmath_mode2str(mode);
}

"""
        % body.rstrip()
    )


def maybe_skip(enum):
    return enum in (
        "dnnl_memory_extra_flags_t",
        "dnnl_normalization_flags_t",
        "dnnl_query_t",
        "dnnl_rnn_cell_flags_t",
        "dnnl_stream_flags_t",
        "dnnl_format_kind_t",
    )


def enum_abbrev(enum):
    def_enum = re.sub(r"^dnnl_", "", enum)
    def_enum = re.sub(r"_t$", "", def_enum)
    return {
        "dnnl_data_type_t": "dt",
        "dnnl_format_tag_t": "fmt_tag",
        "dnnl_primitive_kind_t": "prim_kind",
        "dnnl_engine_kind_t": "engine_kind",
    }.get(enum, def_enum)


def sanitize_value(v):
    if "undef" in v:
        return "undef"
    if "any" in v:
        return "any"
    v = v.split("dnnl_fpmath_mode_")[-1]
    v = v.split("dnnl_scratchpad_mode_")[-1]
    v = v.split("dnnl_")[-1]
    return v


def func_to_str_decl(enum, is_header=False):
    abbrev = enum_abbrev(enum)
    return "const char %s*dnnl_%s2str(%s v)" % (
        "DNNL_API " if is_header else "",
        abbrev,
        enum,
    )


def func_to_str(enum, values):
    indent = "    "
    abbrev = enum_abbrev(enum)
    func = ""
    func += func_to_str_decl(enum) + " {\n"
    for v in values:
        func += '%sif (v == %s) return "%s";\n' % (indent, v, sanitize_value(v))
    func += '%sassert(!"unknown %s");\n' % (indent, abbrev)
    func += '%sreturn "unknown %s";\n}\n' % (indent, abbrev)
    return func


def str_to_func_decl(enum, is_header=False, is_dnnl=True):
    attr = "DNNL_API " if is_header and is_dnnl else ""
    prefix = "dnnl_" if is_dnnl else ""
    abbrev = enum_abbrev(enum)
    return "%s %s%sstr2%s(const char *str)" % (enum, attr, prefix, abbrev)


def str_to_func(enum, values, is_dnnl=True):
    indent = "    "
    abbrev = enum_abbrev(enum)
    func = ""
    func += str_to_func_decl(enum, is_dnnl=is_dnnl) + " {\n"
    func += """#define CASE(_case) do { \\
    if (!strcmp(STRINGIFY(_case), str) \\
            || !strcmp("dnnl_" STRINGIFY(_case), str)) \\
        return CONCAT2(dnnl_, _case); \\
} while (0)
"""
    special_values = []
    for v in values:
        if "last" in v:
            continue
        if "undef" in v:
            v_undef = v
            special_values.append(v)
            continue
        if "any" in v:
            special_values.append(v)
            continue
        func += "%sCASE(%s);\n" % (indent, sanitize_value(v))
    func += "#undef CASE\n"
    for v in special_values:
        v_short = re.search(r"(any|undef)", v).group()
        func += """%sif (!strcmp("%s", str) || !strcmp("%s", str))
        return %s;
""" % (
            indent,
            v_short,
            v,
            v,
        )
    if enum != "dnnl_format_tag_t":
        func += (
            '%sprintf("Error: %s ' % (indent, abbrev)
            + '`%s` is not supported.\\n", str);\n'
        )
        func += '%sassert(!"unknown %s");\n' % (indent, abbrev)
    func += "%sreturn %s;\n}\n" % (
        indent,
        v_undef if enum != "dnnl_format_tag_t" else "dnnl_format_tag_last",
    )
    return func


def generate(ifile, banner_years):
    h_body, s_body = "", ""
    h_benchdnn_body, s_benchdnn_body = "", ""
    root = ET.parse(ifile).getroot()
    for v_enum in root.findall("Enumeration"):
        enum = v_enum.attrib["name"]
        if maybe_skip(enum):
            continue
        values = [v_value.attrib["name"] for v_value in v_enum.findall("EnumValue")]

        if enum in ["dnnl_sparse_encoding_t"]:
            h_body += "#ifdef DNNL_EXPERIMENTAL_SPARSE\n"
            s_body += "#ifdef DNNL_EXPERIMENTAL_SPARSE\n"

        h_body += func_to_str_decl(enum, is_header=True) + ";\n"
        s_body += func_to_str(enum, values) + "\n"

        if enum in ["dnnl_sparse_encoding_t"]:
            h_body += "#endif\n"
            s_body += "#endif\n"

        if enum in ["dnnl_format_tag_t", "dnnl_data_type_t", "dnnl_sparse_encoding_t"]:
            if enum in ["dnnl_sparse_encoding_t"]:
                h_benchdnn_body += "#ifdef DNNL_EXPERIMENTAL_SPARSE\n"
                s_benchdnn_body += "#ifdef DNNL_EXPERIMENTAL_SPARSE\n"

            h_benchdnn_body += (
                str_to_func_decl(enum, is_header=True, is_dnnl=False) + ";\n"
            )
            s_benchdnn_body += str_to_func(enum, values, is_dnnl=False) + "\n"

            if enum in ["dnnl_sparse_encoding_t"]:
                h_benchdnn_body += "#endif\n"
                s_benchdnn_body += "#endif\n"

    bodies = [
        header(h_body),
        source(s_body),
        header_benchdnn(h_benchdnn_body),
        source_benchdnn(s_benchdnn_body),
    ]
    return [template(b, y) for b, y in zip(bodies, banner_years)]


def usage():
    print(
        """\
%s types.xml

Generates oneDNN debug header and source files with enum to string mapping.
Input types.xml file can be obtained with CastXML[1]:
$ castxml --castxml-cc-gnu-c clang --castxml-output=1 \\
        -DDNNL_EXPERIMENTAL_SPARSE -Iinclude -Ibuild/include \\
        include/oneapi/dnnl/dnnl_types.h -o types.xml

[1] https://github.com/CastXML/CastXML"""
        % sys.argv[0]
    )
    sys.exit(1)


for arg in sys.argv:
    if "-help" in arg:
        usage()

script_root = os.path.dirname(os.path.realpath(__file__))

ifile = sys.argv[1] if len(sys.argv) > 1 else usage()

file_paths = (
    "%s/../include/oneapi/dnnl/dnnl_debug.h" % script_root,
    "%s/../src/common/dnnl_debug_autogenerated.cpp" % script_root,
    "%s/../tests/benchdnn/dnnl_debug.hpp" % script_root,
    "%s/../tests/benchdnn/dnnl_debug_autogenerated.cpp" % script_root,
)

banner_years = []
for file_path in file_paths:
    with open(file_path, "r") as f:
        m = re.search(r"Copyright (.*) Intel", f.read())
        banner_years.append(m.group(1).split("-")[0])

for file_path, file_body in zip(file_paths, generate(ifile, banner_years)):
    with open(file_path, "w") as f:
        f.write(file_body)
