#!/usr/bin/env python3

# http://inamidst.com/saxo/
# Created by Sean B. Palmer

import os
import saxo

HEXCODE = 0
CODEPOINT = 1
NAME = 2
CURRENT = 3
ANCIENT = 4
CATEGORY = 5
CHARACTER = 6
DISPLAY = 7

@saxo.pipe
def unicode_by_codepoint(arg):
    if not arg:
        return "Search for a unicode character by hexadecimal codepoint"

    for prefix in ("U+", "u+", r"\u"):
        if arg.startswith(prefix):
            arg = arg[len(prefix):]
            break

    arg = arg.upper()
    allowed = set("0123456789ABCDEF")
    if (len(arg) not in {4,5,6}) or (set(arg) - allowed):
        return "Usage: search for a hexadecimal codepoint, [0-9A-F]{4,6}"

    arg = "%04X" % int(arg, 16)
    with saxo.database(dotdir=True) as db:
        if "saxo_unicode" not in db:
            return "The unicode database needs to be updated"

        query = "SELECT * FROM saxo_unicode WHERE hexcode = ?"
        rows = list(db.query(query, arg))

    if len(rows) > 1:
        return "There was an error, multiple rows returned"
    elif not rows:
        return "No information found about that codepoint"

    row = rows[0]
    return "U+%s %s (%s)" % (row[HEXCODE], row[NAME], row[DISPLAY])