"""Functions used to generate source files during build time

All such functions are invoked in a subprocess on Windows to prevent build flakiness.
"""

from platform_methods import subprocess_main
from compat import iteritems, itervalues, open_utf8, escape_string, byte_to_str


def make_certs_header(target, source, env):

    src = source[0]
    dst = target[0]
    f = open(src, "rb")
    g = open_utf8(dst, "w")
    buf = f.read()
    decomp_size = len(buf)
    import zlib
    buf = zlib.compress(buf)

    g.write("/* THIS FILE IS GENERATED DO NOT EDIT */\n")
    g.write("#ifndef CERTS_COMPRESSED_GEN_H\n")
    g.write("#define CERTS_COMPRESSED_GEN_H\n")

    # System certs path. Editor will use them if defined. (for package maintainers)
    path = env['system_certs_path']
    g.write("#define _SYSTEM_CERTS_PATH \"%s\"\n" % str(path))
    if env['builtin_certs']:
        # Defined here and not in env so changing it does not trigger a full rebuild.
        g.write("#define BUILTIN_CERTS_ENABLED\n")
        g.write("static const int _certs_compressed_size = " + str(len(buf)) + ";\n")
        g.write("static const int _certs_uncompressed_size = " + str(decomp_size) + ";\n")
        g.write("static const unsigned char _certs_compressed[] = {\n")
        for i in range(len(buf)):
            g.write("\t" + byte_to_str(buf[i]) + ",\n")
        g.write("};\n")
    g.write("#endif // CERTS_COMPRESSED_GEN_H")

    g.close()
    f.close()


def make_authors_header(target, source, env):
    sections = ["Project Founders", "Lead Developer", "Project Manager", "Developers"]
    sections_id = ["AUTHORS_FOUNDERS", "AUTHORS_LEAD_DEVELOPERS", "AUTHORS_PROJECT_MANAGERS", "AUTHORS_DEVELOPERS"]

    src = source[0]
    dst = target[0]
    f = open_utf8(src, "r")
    g = open_utf8(dst, "w")

    g.write("/* THIS FILE IS GENERATED DO NOT EDIT */\n")
    g.write("#ifndef AUTHORS_GEN_H\n")
    g.write("#define AUTHORS_GEN_H\n")

    reading = False

    def close_section():
        g.write("\t0\n")
        g.write("};\n")

    for line in f:
        if reading:
            if line.startswith("    "):
                g.write("\t\"" + escape_string(line.strip()) + "\",\n")
                continue
        if line.startswith("## "):
            if reading:
                close_section()
                reading = False
            for section, section_id in zip(sections, sections_id):
                if line.strip().endswith(section):
                    current_section = escape_string(section_id)
                    reading = True
                    g.write("const char *const " + current_section + "[] = {\n")
                    break

    if reading:
        close_section()

    g.write("#endif // AUTHORS_GEN_H\n")

    g.close()
    f.close()


def make_donors_header(target, source, env):
    sections = ["Platinum sponsors", "Gold sponsors", "Mini sponsors",
                "Gold donors", "Silver donors", "Bronze donors"]
    sections_id = ["DONORS_SPONSOR_PLAT", "DONORS_SPONSOR_GOLD", "DONORS_SPONSOR_MINI",
                   "DONORS_GOLD", "DONORS_SILVER", "DONORS_BRONZE"]

    src = source[0]
    dst = target[0]
    f = open_utf8(src, "r")
    g = open_utf8(dst, "w")

    g.write("/* THIS FILE IS GENERATED DO NOT EDIT */\n")
    g.write("#ifndef DONORS_GEN_H\n")
    g.write("#define DONORS_GEN_H\n")

    reading = False

    def close_section():
        g.write("\t0\n")
        g.write("};\n")

    for line in f:
        if reading >= 0:
            if line.startswith("    "):
                g.write("\t\"" + escape_string(line.strip()) + "\",\n")
                continue
        if line.startswith("## "):
            if reading:
                close_section()
                reading = False
            for section, section_id in zip(sections, sections_id):
                if line.strip().endswith(section):
                    current_section = escape_string(section_id)
                    reading = True
                    g.write("const char *const " + current_section + "[] = {\n")
                    break

    if reading:
        close_section()

    g.write("#endif // DONORS_GEN_H\n")

    g.close()
    f.close()


def make_license_header(target, source, env):
    src_copyright = source[0]
    src_license = source[1]
    dst = target[0]

    class LicenseReader:
        def __init__(self, license_file):
            self._license_file = license_file
            self.line_num = 0
            self.current = self.next_line()

        def next_line(self):
            line = self._license_file.readline()
            self.line_num += 1
            while line.startswith("#"):
                line = self._license_file.readline()
                self.line_num += 1
            self.current = line
            return line

        def next_tag(self):
            if not ':' in self.current:
                return ('', [])
            tag, line = self.current.split(":", 1)
            lines = [line.strip()]
            while self.next_line() and self.current.startswith(" "):
                lines.append(self.current.strip())
            return (tag, lines)

    from collections import OrderedDict
    projects = OrderedDict()
    license_list = []

    with open_utf8(src_copyright, "r") as copyright_file:
        reader = LicenseReader(copyright_file)
        part = {}
        while reader.current:
            tag, content = reader.next_tag()
            if tag in ("Files", "Copyright", "License"):
                part[tag] = content[:]
            elif tag == "Comment":
                # attach part to named project
                projects[content[0]] = projects.get(content[0], []) + [part]

            if not tag or not reader.current:
                # end of a paragraph start a new part
                if "License" in part and not "Files" in part:
                    # no Files tag in this one, so assume standalone license
                    license_list.append(part["License"])
                part = {}
                reader.next_line()

    data_list = []
    for project in itervalues(projects):
        for part in project:
            part["file_index"] = len(data_list)
            data_list += part["Files"]
            part["copyright_index"] = len(data_list)
            data_list += part["Copyright"]

    with open_utf8(dst, "w") as f:

        f.write("/* THIS FILE IS GENERATED DO NOT EDIT */\n")
        f.write("#ifndef LICENSE_GEN_H\n")
        f.write("#define LICENSE_GEN_H\n")
        f.write("const char *const GODOT_LICENSE_TEXT =")

        with open_utf8(src_license, "r") as license_file:
            for line in license_file:
                escaped_string = escape_string(line.strip())
                f.write("\n\t\t\"" + escaped_string + "\\n\"")
        f.write(";\n\n")

        f.write("struct ComponentCopyrightPart {\n"
                "\tconst char *license;\n"
                "\tconst char *const *files;\n"
                "\tconst char *const *copyright_statements;\n"
                "\tint file_count;\n"
                "\tint copyright_count;\n"
                "};\n\n")

        f.write("struct ComponentCopyright {\n"
                "\tconst char *name;\n"
                "\tconst ComponentCopyrightPart *parts;\n"
                "\tint part_count;\n"
                "};\n\n")

        f.write("const char *const COPYRIGHT_INFO_DATA[] = {\n")
        for line in data_list:
            f.write("\t\"" + escape_string(line) + "\",\n")
        f.write("};\n\n")

        f.write("const ComponentCopyrightPart COPYRIGHT_PROJECT_PARTS[] = {\n")
        part_index = 0
        part_indexes = {}
        for project_name, project in iteritems(projects):
            part_indexes[project_name] = part_index
            for part in project:
                f.write("\t{ \"" + escape_string(part["License"][0]) + "\", "
                        + "&COPYRIGHT_INFO_DATA[" + str(part["file_index"]) + "], "
                        + "&COPYRIGHT_INFO_DATA[" + str(part["copyright_index"]) + "], "
                        + str(len(part["Files"])) + ", "
                        + str(len(part["Copyright"])) + " },\n")
                part_index += 1
        f.write("};\n\n")

        f.write("const int COPYRIGHT_INFO_COUNT = " + str(len(projects)) + ";\n")

        f.write("const ComponentCopyright COPYRIGHT_INFO[] = {\n")
        for project_name, project in iteritems(projects):
            f.write("\t{ \"" + escape_string(project_name) + "\", "
                    + "&COPYRIGHT_PROJECT_PARTS[" + str(part_indexes[project_name]) + "], "
                    + str(len(project)) + " },\n")
        f.write("};\n\n")

        f.write("const int LICENSE_COUNT = " + str(len(license_list)) + ";\n")

        f.write("const char *const LICENSE_NAMES[] = {\n")
        for l in license_list:
            f.write("\t\"" + escape_string(l[0]) + "\",\n")
        f.write("};\n\n")

        f.write("const char *const LICENSE_BODIES[] = {\n\n")
        for l in license_list:
            for line in l[1:]:
                if line == ".":
                    f.write("\t\"\\n\"\n")
                else:
                    f.write("\t\"" + escape_string(line) + "\\n\"\n")
            f.write("\t\"\",\n\n")
        f.write("};\n\n")

        f.write("#endif // LICENSE_GEN_H\n")


if __name__ == '__main__':
    subprocess_main(globals())