"""
Bazel build file for NLopt
"""

package(default_visibility = ["//visibility:public"])

load("@rules_cc//cc:defs.bzl", "cc_library")
load("@cmake_configure_file//:cmake_configure_file.bzl", "cmake_configure_file")

# Generate nlopt_config.h from template
cmake_configure_file(
    name = "generate_config_header",
    src = "nlopt_config.h.in",
    out = "src/api/nlopt_config.h",
    defines = [
        # Version numbers
        "NLOPT_MAJOR_VERSION=2",
        "NLOPT_MINOR_VERSION=7",
        "NLOPT_BUGFIX_VERSION=1",
        # Feature detection
        "HAVE_COPYSIGN",
        "HAVE_FPCLASSIFY",
        "HAVE_GETOPT_H",
        "HAVE_GETOPT",
        "HAVE_GETPID",
        "HAVE_GETTIMEOFDAY",
        "HAVE_ISINF",
        "HAVE_ISNAN",
        "HAVE_QSORT_R",
        "HAVE_STDINT_H",
        "HAVE_SYS_TIME_H",
        "HAVE_TIME",
        "HAVE_UINT32_T",
        "HAVE_UNISTD_H",
        # C++ support
        "NLOPT_CXX",
        "NLOPT_CXX11",
        # Thread local storage
        "THREADLOCAL=__thread",
        # Type sizes
        "SIZEOF_UNSIGNED_INT=4",
        "SIZEOF_UNSIGNED_LONG=8",
        # Time handling
        "TIME_WITH_SYS_TIME",
    ],
)

# Generate C++ header (nlopt.hpp) from template
genrule(
    name = "generate_cpp_header",
    srcs = [
        "src/api/nlopt-in.hpp",
        "src/api/nlopt.h",
    ],
    outs = ["nlopt.hpp"],
    cmd = """
        $(location //tools:generate_cpp) \
            $(location src/api/nlopt-in.hpp) \
            $(location src/api/nlopt.h) \
            $(location nlopt.hpp)
    """,
    tools = ["//tools:generate_cpp"],
)

# Generate Fortran interface (nlopt.f) from C header
genrule(
    name = "generate_fortran_header",
    srcs = ["src/api/nlopt.h"],
    outs = ["nlopt.f"],
    cmd = """
        $(location //tools:generate_fortran) \
            $(location src/api/nlopt.h) \
            $(location nlopt.f)
    """,
    tools = ["//tools:generate_fortran"],
)

# Compile NLopt library
cc_library(
    name = "nlopt",
    srcs = glob(
        [
            "src/algs/**/*.c",
            "src/algs/**/*.cc",
            "src/api/*.c",
            "src/util/*.c",
            "src/algs/**/*.h",
            "src/algs/**/*.hpp",
            "src/api/nlopt-internal.h",
            "src/api/f77funcs.h",
            "src/api/f77funcs_.h",
            "src/util/*.h",
        ],
        exclude = [
            "src/util/nlopt-getopt.c",
            "src/util/*_test.c",
            "src/algs/cquad/**",
            "src/algs/direct/DIRparallel.c",
            "src/algs/direct/tstc.c",
            "src/algs/stogo/tstc.c",
            "src/algs/stogo/testros.cc",
            "src/algs/stogo/tst.cc",
            "src/algs/stogo/prog.cc",
            "src/algs/ags/tst.cc",
        ],
    ) + select({
        "@platforms//os:windows": ["src/util/nlopt-getopt.c"],
        "//conditions:default": [],
    }),
    hdrs = [
        "src/api/nlopt.h",
        ":generate_cpp_header",
        ":generate_config_header",
    ],
    copts = select({
        "@platforms//os:windows": [
            "/D_CRT_SECURE_NO_WARNINGS",
        ],
        "//conditions:default": [
            "-fPIC",
            "-Wno-unused-parameter",
            "-Wno-deprecated-declarations",
            "-Wno-unused-variable",
            "-Wno-nonnull",
            "-Wno-unused-value",
        ],
    }),
    defines = select({
        "@platforms//os:windows": ["NLOPT_DLL"],
        "//conditions:default": [],
    }),
    includes = [
        ".",
        "src/api",
        "src/util",
        "src/algs/direct",
        "src/algs/cdirect",
        "src/algs/praxis",
        "src/algs/luksan",
        "src/algs/crs",
        "src/algs/mlsl",
        "src/algs/mma",
        "src/algs/cobyla",
        "src/algs/newuoa",
        "src/algs/neldermead",
        "src/algs/auglag",
        "src/algs/bobyqa",
        "src/algs/isres",
        "src/algs/slsqp",
        "src/algs/esch",
        "src/algs/stogo",
        "src/algs/ags",
    ],
    linkopts = select({
        "@platforms//os:linux": ["-lm"],
        "@platforms//os:macos": ["-lm"],
        "@platforms//os:freebsd": ["-lm"],
        "//conditions:default": [],
    }),
)

# Convenience filegroup for generated headers
filegroup(
    name = "generated_headers",
    srcs = [
        ":generate_cpp_header",
        ":generate_fortran_header",
    ],
)