# SPDX-FileCopyrightText: 2010-2023 Blender Authors
#
# SPDX-License-Identifier: GPL-2.0-or-later

# classes for extracting info from blenders internal classes


def write_sysinfo(filepath):
    import sys
    import platform

    import subprocess

    import bpy
    import gpu

    # pretty repr
    def prepr(v):
        r = repr(v)
        vt = type(v)
        if vt is bytes:
            r = r[2:-1]
        elif vt is list or vt is tuple:
            r = r[1:-1]
        return r

    with open(filepath, 'w', encoding="utf-8") as output:
        try:
            header = "= Blender {:s} System Information =\n".format(bpy.app.version_string)
            lilies = "{:s}\n\n".format((len(header) - 1) * "=")
            output.write(lilies[:-1])
            output.write(header)
            output.write(lilies)

            def title(text):
                return "\n{:s}:\n{:s}".format(text, lilies)

            # build info
            output.write(title("Blender"))
            output.write(
                "version: {:s}, branch: {:s}, commit date: {:s} {:s}, hash: {:s}, type: {:s}\n".format(
                    bpy.app.version_string,
                    prepr(bpy.app.build_branch),
                    prepr(bpy.app.build_commit_date),
                    prepr(bpy.app.build_commit_time),
                    prepr(bpy.app.build_hash),
                    prepr(bpy.app.build_type),
                )
            )

            output.write("build date: {:s}, {:s}\n".format(prepr(bpy.app.build_date), prepr(bpy.app.build_time)))
            output.write("platform: {:s}\n".format(prepr(platform.platform())))
            output.write("binary path: {:s}\n".format(prepr(bpy.app.binary_path)))
            output.write("build cflags: {:s}\n".format(prepr(bpy.app.build_cflags)))
            output.write("build cxxflags: {:s}\n".format(prepr(bpy.app.build_cxxflags)))
            output.write("build linkflags: {:s}\n".format(prepr(bpy.app.build_linkflags)))
            output.write("build system: {:s}\n".format(prepr(bpy.app.build_system)))

            # Windowing Environment (include when dynamically selectable).
            from _bpy import _ghost_backend
            ghost_backend = _ghost_backend()
            if ghost_backend not in {'NONE', 'DEFAULT'}:
                output.write("windowing environment: {:s}\n".format(prepr(ghost_backend)))
            del _ghost_backend, ghost_backend

            # Python info.
            output.write(title("Python"))
            output.write("version: {:s}\n".format(sys.version.replace("\n", " ")))
            output.write("file system encoding: {:s}:{:s}\n".format(
                sys.getfilesystemencoding(),
                sys.getfilesystemencodeerrors(),
            ))
            output.write("paths:\n")
            for p in sys.path:
                output.write("\t{!r}\n".format(p))

            output.write(title("Python (External Binary)"))
            output.write("binary path: {:s}\n".format(prepr(sys.executable)))
            try:
                py_ver = prepr(subprocess.check_output([
                    sys.executable,
                    "--version",
                ]).strip())
            except BaseException as ex:
                py_ver = str(ex)
            output.write("version: {:s}\n".format(py_ver))
            del py_ver

            output.write(title("Directories"))
            output.write("scripts:\n")
            for p in bpy.utils.script_paths():
                output.write("\t{!r}\n".format(p))
            output.write("user scripts: {!r}\n".format(bpy.utils.script_path_user()))
            output.write("pref scripts:\n")
            for p in bpy.utils.script_paths_pref():
                output.write("\t{!r}\n".format(p))
            output.write("datafiles: {!r}\n".format(bpy.utils.user_resource('DATAFILES')))
            output.write("config: {!r}\n".format(bpy.utils.user_resource('CONFIG')))
            output.write("scripts: {!r}\n".format(bpy.utils.user_resource('SCRIPTS')))
            output.write("extensions: {!r}\n".format(bpy.utils.user_resource('EXTENSIONS')))
            output.write("tempdir: {!r}\n".format(bpy.app.tempdir))

            output.write(title("FFmpeg"))
            ffmpeg = bpy.app.ffmpeg
            if ffmpeg.supported:
                for lib in ("avcodec", "avdevice", "avformat", "avutil", "swscale"):
                    output.write(
                        "{:s}:{:s}{!r}\n".format(
                            lib,
                            " " * (10 - len(lib)),
                            getattr(ffmpeg, lib + "_version_string"),
                        )
                    )
            else:
                output.write("Blender was built without FFmpeg support\n")

            if bpy.app.build_options.sdl:
                output.write(title("SDL"))
                output.write("Version: {:s}\n".format(bpy.app.sdl.version_string))
                output.write("Loading method: ")
                if bpy.app.build_options.sdl_dynload:
                    output.write("dynamically loaded by Blender (WITH_SDL_DYNLOAD=ON)\n")
                else:
                    output.write("linked (WITH_SDL_DYNLOAD=OFF)\n")
                if not bpy.app.sdl.available:
                    output.write("WARNING: Blender could not load SDL library\n")

            output.write(title("Other Libraries"))
            ocio = bpy.app.ocio
            output.write("OpenColorIO: ")
            if ocio.supported:
                if ocio.version_string == "fallback":
                    output.write("Blender was built with OpenColorIO, "
                                 "but it currently uses fallback color management.\n")
                else:
                    output.write("{:s}\n".format(ocio.version_string))
            else:
                output.write("Blender was built without OpenColorIO support\n")

            oiio = bpy.app.oiio
            output.write("OpenImageIO: ")
            if ocio.supported:
                output.write("{:s}\n".format(oiio.version_string))
            else:
                output.write("Blender was built without OpenImageIO support\n")

            output.write("OpenShadingLanguage: ")
            if bpy.app.build_options.cycles:
                if bpy.app.build_options.cycles_osl:
                    from _cycles import osl_version_string
                    output.write("{:s}\n".format(osl_version_string))
                else:
                    output.write("Blender was built without OpenShadingLanguage support in Cycles\n")
            else:
                output.write("Blender was built without Cycles support\n")

            opensubdiv = bpy.app.opensubdiv
            output.write("OpenSubdiv: ")
            if opensubdiv.supported:
                output.write("{:s}\n".format(opensubdiv.version_string))
            else:
                output.write("Blender was built without OpenSubdiv support\n")

            openvdb = bpy.app.openvdb
            output.write("OpenVDB: ")
            if openvdb.supported:
                output.write("{:s}\n".format(openvdb.version_string))
            else:
                output.write("Blender was built without OpenVDB support\n")

            alembic = bpy.app.alembic
            output.write("Alembic: ")
            if alembic.supported:
                output.write("{:s}\n".format(alembic.version_string))
            else:
                output.write("Blender was built without Alembic support\n")

            usd = bpy.app.usd
            output.write("USD: ")
            if usd.supported:
                output.write("{:s}\n".format(usd.version_string))
            else:
                output.write("Blender was built without USD support\n")

            if not bpy.app.build_options.sdl:
                output.write("SDL: Blender was built without SDL support\n")

            if bpy.app.background:
                output.write("\nGPU: missing, background mode\n")
            else:
                output.write(title("GPU"))
                output.write("renderer:\t{!r}\n".format(gpu.platform.renderer_get()))
                output.write("vendor:\t\t{!r}\n".format(gpu.platform.vendor_get()))
                output.write("version:\t{!r}\n".format(gpu.platform.version_get()))
                output.write("device type:\t{!r}\n".format(gpu.platform.device_type_get()))
                output.write("backend type:\t{!r}\n".format(gpu.platform.backend_type_get()))
                output.write("extensions:\n")

                glext = sorted(gpu.capabilities.extensions_get())

                for l in glext:
                    output.write("\t{:s}\n".format(l))

                output.write(title("Implementation Dependent GPU Limits"))
                output.write("Maximum Batch Vertices:\t{:d}\n".format(
                    gpu.capabilities.max_batch_vertices_get(),
                ))
                output.write("Maximum Batch Indices:\t{:d}\n".format(
                    gpu.capabilities.max_batch_indices_get(),
                ))

                output.write("\nGLSL:\n")
                output.write("Maximum Varying Floats:\t{:d}\n".format(
                    gpu.capabilities.max_varying_floats_get(),
                ))
                output.write("Maximum Vertex Attributes:\t{:d}\n".format(
                    gpu.capabilities.max_vertex_attribs_get(),
                ))
                output.write("Maximum Vertex Uniform Components:\t{:d}\n".format(
                    gpu.capabilities.max_uniforms_vert_get(),
                ))
                output.write("Maximum Fragment Uniform Components:\t{:d}\n".format(
                    gpu.capabilities.max_uniforms_frag_get(),
                ))
                output.write("Maximum Vertex Image Units:\t{:d}\n".format(
                    gpu.capabilities.max_textures_vert_get(),
                ))
                output.write("Maximum Fragment Image Units:\t{:d}\n".format(
                    gpu.capabilities.max_textures_frag_get(),
                ))
                output.write("Maximum Pipeline Image Units:\t{:d}\n".format(
                    gpu.capabilities.max_textures_get(),
                ))
                output.write("Maximum Image Units:\t{:d}\n".format(
                    gpu.capabilities.max_images_get(),
                ))

            if bpy.app.build_options.cycles:
                import cycles
                output.write(title("Cycles"))
                output.write(cycles.engine.system_info())

            import addon_utils
            addon_utils.modules()
            output.write(title("Enabled add-ons"))
            for addon in bpy.context.preferences.addons.keys():
                addon_mod = addon_utils.addons_fake_modules.get(addon, None)
                if addon_mod is None:
                    output.write("{:s} (MISSING)\n".format(addon))
                else:
                    output.write(
                        "{:s} (version: {:s}, path: {!r})\n".format(
                            addon,
                            str(addon_mod.bl_info.get("version", "UNKNOWN")),
                            addon_mod.__file__,
                        )
                    )
        except BaseException as ex:
            output.write("ERROR: {:s}\n".format(str(ex)))