from ._ucre_data import SRC_ANY, SRC_CC, SRC_CF, SRC_P, SRC_Z

# \p{\Z\P\Cc\CF} (white spaces + control + format + punctuation)
SRC_ZPCC = "|".join([SRC_Z, SRC_P, SRC_CC])

# \p{\Z\Cc} (white spaces + control)
SRC_ZCC = "|".join([SRC_Z, SRC_CC])

# Experimental. List of chars, completely prohibited in links
# because can separate it from other part of text
TEXT_SEPARATORS = "[><\uff5c]"

# All possible word characters (everything without punctuation, spaces & controls)
# Defined via punctuation & spaces to save space
# Should be something like \p{\L\N\S\M} (\w but without `_`)
SRC_PSEUDO_LETTER = "(?:(?!" + TEXT_SEPARATORS + "|" + SRC_ZPCC + ")" + SRC_ANY + ")"
# The same as abothe but without [0-9]
# var SRC_PSEUDO_LETTER_non_d = '(?:(?![0-9]|' + SRC_ZPCC + ')' + SRC_ANY + ')'

# =============================================================================

SRC_IP4 = (
    "(?:(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(25[0-5]|"
    + "2[0-4][0-9]|[01]?[0-9][0-9]?)"
)

# Prohibit any of "@/[]()" in user/pass to avoid wrong domain fetch.
# Length is capped to exclude possible rescans till the end and avoid O(n^2)
# DoS. No standard limit, just take something reasonable.
SRC_AUTH = "(?:(?:(?!" + SRC_ZCC + "|[@/\\[\\]()]).){1,50}@)?"

SRC_PORT = (
    "(?::(?:6(?:[0-4]\\d{3}|5(?:[0-4]\\d{2}|5(?:[0-2]\\d|3[0-5])))|[1-5]?\\d{1,4}))?"
)

# Allow anything in markdown spec, forbid quote (") at the first position
# because emails enclosed in quotes are far more common
# Max name length capped to 64 chars (RFC 5321). This also prevents O(n^2)
# rescans to the end on inputs like `mailto:mailto:...`
SRC_EMAIL_NAME = '[\\-;:&=\\+\\$,\\.a-zA-Z0-9_][\\-;:&=\\+\\$,\\"\\.a-zA-Z0-9_]{0,63}'

SRC_XN = "xn--[a-z0-9\\-]{1,59}"

# More to read about domain names
# http:#serverfault.com/questions/638260/

# Allow letters & digits (http:#test1)
SRC_DOMAIN_ROOT = "(?:" + SRC_XN + "|" + SRC_PSEUDO_LETTER + "{1,63}" + ")"

SRC_DOMAIN = (
    "(?:"
    + SRC_XN
    + "|"
    + "(?:"
    + SRC_PSEUDO_LETTER
    + ")"
    + "|"
    + "(?:"
    + SRC_PSEUDO_LETTER
    + "(?:-|"
    + SRC_PSEUDO_LETTER
    + "){0,61}"
    + SRC_PSEUDO_LETTER
    + ")"
    + ")"
)

SRC_HOST = (
    "(?:"
    +
    # Don't need IP check, because digits are already allowed in normal domain names
    # SRC_IP4 +
    # '|' +
    "(?:(?:(?:"
    + SRC_DOMAIN
    + ")\\.)*"
    + SRC_DOMAIN  # _root
    + ")"
    + ")"
)

TPL_HOST_FUZZY = (
    "(?:" + SRC_IP4 + "|" + "(?:(?:(?:" + SRC_DOMAIN + ")\\.)+(?:%TLDS%))" + ")"
)

TPL_HOST_NO_IP_FUZZY = "(?:(?:(?:" + SRC_DOMAIN + ")\\.)+(?:%TLDS%))"


# =============================================================================

# Rude test fuzzy links by host, for quick deny
TPL_HOST_FUZZY_TEST = (
    "localhost|www\\.|\\.\\d{1,3}\\.|(?:\\.(?:%TLDS%)(?:" + SRC_ZPCC + "|>|$))"
)


def _re_host_terminator(opts):
    src_host_terminator = (
        "(?=$|"
        + TEXT_SEPARATORS
        + "|"
        + SRC_ZPCC
        + ")"
        + "(?!"
        + ("-(?!--)|" if opts.get("---") else "-|")
        + "_|:\\d|\\.-|\\.(?!$|"
        + SRC_ZPCC
        + "))"
    )
    return src_host_terminator


def _re_src_path(opts):
    src_path = (
        "(?:"
        + "[/?#]"
        + "(?:"
        + "(?!"
        + SRC_ZCC
        + "|"
        + TEXT_SEPARATORS
        + "|[()[\\]{}.,\"'?!\\-;]).|"
        + "\\[(?:(?!"
        + SRC_ZCC
        + "|\\]).)*\\]|"
        + "\\((?:(?!"
        + SRC_ZCC
        + "|[)]).)*\\)|"
        + "\\{(?:(?!"
        + SRC_ZCC
        + "|[}]).)*\\}|"
        + '\\"(?:(?!'
        + SRC_ZCC
        + '|["]).)+\\"|'
        + "\\'(?:(?!"
        + SRC_ZCC
        + "|[']).)+\\'|"
        + "\\'(?="
        + SRC_PSEUDO_LETTER
        + "|[-])|"
        + "\\.{2,}[a-zA-Z0-9%/&]|"
        # google has many dots in "google search" links (#66, #81).
        # github has ... in commit range links,
        # ReSTRICT to
        # - english
        # - percent-encoded
        # - parts of file path
        # - params separator
        # until more examples found.
        + "\\.(?!"
        + SRC_ZCC
        + "|[.]|$)|"
        + ("\\-(?!--(?:[^-]|$))(?:-*)|" if opts.get("---") else "\\-+|")
        + ",(?!"
        + SRC_ZCC
        + "|$)|"  # allow `,,,` in paths
        + ";(?!"
        + SRC_ZCC
        + "|$)|"  # allow `,,,` in paths
        + "\\!+(?!"
        + SRC_ZCC
        + "|[!]|$)|"  # allow `!!!` in paths, but not at the end
        + "\\?(?!"
        + SRC_ZCC
        + "|[?]|$)"
        + ")+"
        + "|\\/"
        + ")?"
    )

    return src_path


def build_re(opts):
    """Build regex

    Args:
        opts (dict): options

    Return:
        dict: dict of regex string
    """
    SRC_HOST_STRICT = SRC_HOST + _re_host_terminator(opts)

    TPL_HOST_FUZZY_STRICT = TPL_HOST_FUZZY + _re_host_terminator(opts)

    SRC_HOST_PORT_STRICT = SRC_HOST + SRC_PORT + _re_host_terminator(opts)

    TPL_HOST_PORT_FUZZY_STRICT = TPL_HOST_FUZZY + SRC_PORT + _re_host_terminator(opts)

    TPL_HOST_PORT_NO_IP_FUZZY_STRICT = (
        TPL_HOST_NO_IP_FUZZY + SRC_PORT + _re_host_terminator(opts)
    )

    TPL_EMAIL_FUZZY = (
        "(^|"
        + TEXT_SEPARATORS
        + '|"|\\(|'
        + SRC_ZCC
        + ")"
        + "("
        + SRC_EMAIL_NAME
        + "@"
        + TPL_HOST_FUZZY_STRICT
        + ")"
    )

    regex = {
        "src_Any": SRC_ANY,
        "src_Cc": SRC_CC,
        "src_Cf": SRC_CF,
        "src_Z": SRC_Z,
        "src_P": SRC_P,
        "src_ZPCc": SRC_ZPCC,
        "src_ZCc": SRC_ZCC,
        "src_pseudo_letter": SRC_PSEUDO_LETTER,
        "src_ip4": SRC_IP4,
        "src_auth": SRC_AUTH,
        "src_port": SRC_PORT,
        "src_host_terminator": _re_host_terminator(opts),
        "src_path": _re_src_path(opts),
        "src_email_name": SRC_EMAIL_NAME,
        "src_xn": SRC_XN,
        "src_domain_root": SRC_DOMAIN_ROOT,
        "src_domain": SRC_DOMAIN,
        "src_host": SRC_HOST,
        "tpl_host_fuzzy": TPL_HOST_FUZZY,
        "tpl_host_no_ip_fuzzy": TPL_HOST_NO_IP_FUZZY,
        "src_host_strict": SRC_HOST_STRICT,
        "tpl_host_fuzzy_strict": TPL_HOST_FUZZY_STRICT,
        "src_host_port_strict": SRC_HOST_PORT_STRICT,
        "tpl_host_port_fuzzy_strict": TPL_HOST_PORT_FUZZY_STRICT,
        "tpl_host_port_no_ip_fuzzy_strict": TPL_HOST_PORT_FUZZY_STRICT,
        # Main rules
        "tpl_host_fuzzy_test": TPL_HOST_FUZZY_TEST,
        "tpl_email_fuzzy": TPL_EMAIL_FUZZY,
        # Fuzzy link can't be prepended with .:/\- and non punctuation.
        # but can start with > (markdown blockquote)
        "tpl_link_fuzzy": (
            "(^|(?![.:/\\-_@])(?:[$+<=>^`|\uff5c]|"
            + SRC_ZPCC
            + "))"
            + "((?![$+<=>^`|\uff5c])"
            + TPL_HOST_PORT_FUZZY_STRICT
            + _re_src_path(opts)
            + ")"
        ),
        # Fuzzy link can't be prepended with .:/\- and non punctuation.
        # but can start with > (markdown blockquote)
        "tpl_link_no_ip_fuzzy": (
            "(^|(?![.:/\\-_@])(?:[$+<=>^`|\uff5c]|"
            + SRC_ZPCC
            + "))"
            + "((?![$+<=>^`|\uff5c])"
            + TPL_HOST_PORT_NO_IP_FUZZY_STRICT
            + _re_src_path(opts)
            + ")"
        ),
    }

    return regex
