import time
import sys
if sys.version_info >= (3,6):
   Dict = dict
else:
   from collections import OrderedDict as Dict


class PrettyFloat(float):
    def __repr__(self):
        return '%.15g' % self


def get_abs_time(*times):
    now = int(time.time() + 0.999)
    oneyear = 365 * 24 * 3600
    return tuple(t + now if t < oneyear else t for t in times)


class ColorMap(object):
    """"
    ColorMap is using official CSS color names, with the exception of Green, as this
    is defined differently with X11 colors than in SEA, and used heavily in config files.
    Here Green is an alias to Lime (#00FF00) and MidGreen is #008000, which is called Green in CSS.
    The function to_code is case insensitive and accepts also names with underscores.
    The order is choosen by M. Zolliker for the SEA client, originally only the first 16 were used.
    """
    hex_name = (
        ("#FFFFFF", "White"), ("#FF0000", "Red"), ("#00FF00", "Lime"), ("#0000FF", "Blue"), ("#FF00FF", "Magenta"),
        ("#FFFF00", "Yellow"), ("#00FFFF", "Cyan"), ("#000000", "Black"), ("#FFA500", "Orange"),
        ("#006400", "DarkGreen"), ("#9400D3", "DarkViolet"), ("#A52A2A", "Brown"), ("#87CEEB", "SkyBlue"),
        ("#808080", "Gray"), ("#FF69B4", "HotPink"), ("#FFFFE0", "LightYellow"), ("#00FF7F", "SpringGreen"),
        ("#000080", "Navy"), ("#1E90FF", "DodgerBlue"), ("#9ACD32", "YellowGreen"), ("#008B8B", "DarkCyan"),
        ("#808000", "Olive"), ("#DEB887", "BurlyWood"),
        ("#7B68EE", "MediumSlateBlue"), ("#483D8B", "DarkSlateBlue"), ("#98FB98", "PaleGreen"), ("#FF1493", "DeepPink"),
        ("#FF6347", "Tomato"), ("#32CD32", "LimeGreen"), ("#DDA0DD", "Plum"), ("#7FFF00", "Chartreuse"),
        ("#800080", "Purple"), ("#00CED1", "DarkTurquoise"), ("#8FBC8F", "DarkSeaGreen"), ("#4682B4", "SteelBlue"),
        ("#800000", "Maroon"),
        ("#3CB371", "MediumSeaGreen"), ("#FF4500", "OrangeRed"), ("#BA55D3", "MediumOrchid"),
        ("#2F4F4F", "DarkSlateGray"), ("#CD853F", "Peru"), ("#228B22", "ForestGreen"), ("#48D1CC", "MediumTurquoise"),
        ("#DC143C", "Crimson"),
        ("#D3D3D3", "LightGray"), ("#ADFF2F", "GreenYellow"), ("#7FFFD4", "Aquamarine"), ("#BC8F8F", "RosyBrown"),
        ("#20B2AA", "LightSeaGreen"), ("#C71585", "MediumVioletRed"), ("#F0E68C", "Khaki"),
        ("#6495ED", "CornflowerBlue"),
        ("#556B2F", "DarkOliveGreen"), ("#CD5C5C", "IndianRed "), ("#2E8B57", "SeaGreen"), ("#F08080", "LightCoral"),
        ("#8A2BE2", "BlueViolet"), ("#AFEEEE", "PaleTurquoise"), ("#4169E1", "RoyalBlue"), ("#0000CD", "MediumBlue"),
        ("#B8860B", "DarkGoldenRod"), ("#00BFFF", "DeepSkyBlue"), ("#FFC0CB", "Pink"), ("#4B0082", "Indigo "),
        ("#A0522D", "Sienna"),
        ("#FFD700", "Gold"), ("#F4A460", "SandyBrown"), ("#DAA520", "GoldenRod"), ("#DA70D6", "Orchid"),
        ("#E6E6FA", "Lavender"),
        ("#5F9EA0", "CadetBlue"), ("#D2691E", "Chocolate"), ("#66CDAA", "MediumAquaMarine"), ("#6B8E23", "OliveDrab"),
        ("#A9A9A9", "DarkGray"), ("#BDB76B", "DarkKhaki"), ("#696969", "DimGray"), ("#B0C4DE", "LightSteelBlue"),
        ("#191970", "MidnightBlue"), ("#FFE4C4", "Bisque"), ("#6A5ACD", "SlateBlue"), ("#EE82EE", "Violet"),
        ("#8B4513", "SaddleBrown"), ("#FF7F50", "Coral"), ("#008000", "MidGreen"), ("#DB7093", "PaleVioletRed"),
        ("#C0C0C0", "Silver"),
        ("#E0FFFF", "LightCyan"), ("#9370DB", "MediumPurple"), ("#FF8C00", "DarkOrange"),
        ("#00FA9A", "MediumSpringGreen"),
        ("#E9967A", "DarkSalmon"), ("#778899", "LightSlateGray"), ("#9932CC", "DarkOrchid"),
        ("#EEE8AA", "PaleGoldenRod"),
        ("#F8F8FF", "GhostWhite"), ("#FFA07A", "LightSalmon"), ("#ADD8E6", "LightBlue"), ("#D8BFD8", "Thistle"),
        ("#FFE4E1", "MistyRose"), ("#FFDEAD", "NavajoWhite"), ("#40E0D0", "Turquoise"), ("#90EE90", "LightGreen"),
        ("#B22222", "FireBrick"), ("#008080", "Teal"), ("#F0FFF0", "HoneyDew"), ("#FFFACD", "LemonChiffon"),
        ("#FFF5EE", "SeaShell"),
        ("#F5F5DC", "Beige"), ("#DCDCDC", "Gainsboro"), ("#FA8072", "Salmon"), ("#8B008B", "DarkMagenta"),
        ("#FFB6C1", "LightPink"),
        ("#708090", "SlateGray"), ("#87CEFA", "LightSkyBlue"), ("#FFEFD5", "PapayaWhip"), ("#D2B48C", "Tan"),
        ("#FFFFF0", "Ivory"),
        ("#F0FFFF", "Azure"), ("#F5DEB3", "Wheat"), ("#00008B", "DarkBlue"), ("#FFDAB9", "PeachPuff"),
        ("#8B0000", "DarkRed"),
        ("#FAF0E6", "Linen"), ("#B0E0E6", "PowderBlue"), ("#FFE4B5", "Moccasin"), ("#F5F5F5", "WhiteSmoke"),
        ("#FFF8DC", "Cornsilk"),
        ("#FFFAFA", "Snow"), ("#FFF0F5", "LavenderBlush"), ("#FFEBCD", "BlanchedAlmond"), ("#F0F8FF", "AliceBlue"),
        ("#FAEBD7", "AntiqueWhite"), ("#FDF5E6", "OldLace"), ("#FAFAD2", "LightGoldenRodYellow"),
        ("#F5FFFA", "MintCream"),
        ("#FFFAF0", "FloralWhite"), ("#7CFC00", "LawnGreen"), ("#663399", "RebeccaPurple"))
    codes = {}
    for i, pair in enumerate(hex_name):
        codes[pair[0]] = i
        low = pair[1].lower()
        codes[low] = i
        codes[low.replace("gray", "grey")] = i
    codes["green"] = 2
    codes["fuchsia"] = 4
    codes["aqua"] = 6

    @staticmethod
    def to_code(colortext):
        try:
            return int(colortext)
        except ValueError:
            return ColorMap.codes.get(colortext.lower().replace("_", ""),-1)

    @staticmethod
    def check_hex(code):
        if not code.startswith("#"):
            return None
        if len(code) == 4: # convert short code to long code
            code = code[0:2] + code[1:3] + code[2:4] + code[3]
        if len(code) != 7:
            return None
        try:
            int(code[1:]) # we have a valid hex color code
            return code
        except ValueError:
            return None

    @staticmethod
    def to_hex(code):
        try:
            return ColorMap.hex_name[code][0]
        except IndexError:
            return -1


def get_vars(main, time):
    result = {}

    time, = get_abs_time(time)
    # get last value only
    curves = main.get_curve_options((time, time))
    for key, opts in curves.items():
        if not opts.get('show', False):
            continue
        print(key, opts)
        opts = dict(name=key, **opts)
        unit = opts.pop('unit', '*')
        tag = opts.pop('tag', unit)
        if not tag in result:
            result[tag] = dict(tag=tag, unit=unit, curves=Dict())
        if 'label' not in opts:
            opts['label'] = opts['name']
        result[tag]["curves"][key] = opts

    # determine colors
    for _, curvegroup in result.items():
        color_set = set()
        auto_curves = []
        curve_list = list(curvegroup["curves"].values())
        curvegroup['curves'] = curve_list
        for curve in curve_list:
            col = curve.get("color", '').strip()
            c = ColorMap.to_code(col)
            if c < 0:
                valid = ColorMap.check_hex(col)
                if valid:
                    curve["original_color"] = col
                    curve["color"] = valid
                else:
                    auto_curves.append(curve)
                    curve["original_color"] = col + "?"
            else:
                color_set.add(c)
                curve["original_color"] = col
                curve["color"] = ColorMap.to_hex(c)
        c = 1  # omit white
        for curve in auto_curves:
            while c in color_set:
                c += 1  # find unused color
            curve["color"] = ColorMap.to_hex(c)
            c += 1
    return result


def get_curves(main, keys, timerange, cut_begin=True):
    curves = main.get_curves(keys, get_abs_time(*timerange), maxpoints=500, cut_begin=cut_begin)
    opts = main.get_curve_options(timerange, keys)
    #if 'tt:target' in curves:
    #    print('---')
    #    print(curves['tt:target'].fmtm())
    #    print('TT', curves['tt:target'].for_json()[-5:])
    return {k: c.for_json(opts.get(k, {}).get('period', 0)) for k, c in curves.items()}