# ===============================================================================
# Copyright (C) 2014 Ryan Holmes
#
# This file is part of eos.
#
# eos is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) any later version.
#
# eos is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with eos.  If not, see <http://www.gnu.org/licenses/>.
# ===============================================================================

import re
from logbook import Logger
import eos.db

pyfalog = Logger(__name__)


class TargetResists(object):
    # also determined import/export order - VERY IMPORTANT
    DAMAGE_TYPES = ("em", "thermal", "kinetic", "explosive")

    def __init__(self, *args, **kwargs):
        self.update(*args, **kwargs)

    def update(self, emAmount=0, thermalAmount=0, kineticAmount=0, explosiveAmount=0):
        self.emAmount = emAmount
        self.thermalAmount = thermalAmount
        self.kineticAmount = kineticAmount
        self.explosiveAmount = explosiveAmount

    @classmethod
    def importPatterns(cls, text):
        lines = re.split('[\n\r]+', text)
        patterns = []
        numPatterns = 0

        # When we import damage profiles, we create new ones and update old ones. To do this, get a list of current
        # patterns to allow lookup
        lookup = {}
        current = eos.db.getTargetResistsList()
        for pattern in current:
            lookup[pattern.name] = pattern

        for line in lines:
            try:
                if line.strip()[0] == "#":  # comments
                    continue
                line = line.split('#', 1)[0]  # allows for comments
                type, data = line.rsplit('=', 1)
                type, data = type.strip(), data.split(',')
            except:
                pyfalog.warning("Data isn't in correct format, continue to next line.")
                continue

            if type != "TargetResists":
                continue

            numPatterns += 1
            name, data = data[0], data[1:5]
            fields = {}

            for index, val in enumerate(data):
                val = float(val)
                try:
                    assert 0 <= val <= 100
                    fields["%sAmount" % cls.DAMAGE_TYPES[index]] = val / 100
                except:
                    pyfalog.warning("Caught unhandled exception in import patterns.")
                    continue

            if len(fields) == 4:  # Avoid possible blank lines
                if name.strip() in lookup:
                    pattern = lookup[name.strip()]
                    pattern.update(**fields)
                    eos.db.save(pattern)
                else:
                    pattern = TargetResists(**fields)
                    pattern.name = name.strip()
                    eos.db.save(pattern)
                patterns.append(pattern)

        eos.db.commit()

        return patterns, numPatterns

    EXPORT_FORMAT = "TargetResists = %s,%.1f,%.1f,%.1f,%.1f\n"

    @classmethod
    def exportPatterns(cls, *patterns):
        out = "# Exported from pyfa\n#\n"
        out += "# Values are in following format:\n"
        out += "# TargetResists = [name],[EM %],[Thermal %],[Kinetic %],[Explosive %]\n\n"
        for dp in patterns:
            out += cls.EXPORT_FORMAT % (
                dp.name,
                dp.emAmount * 100,
                dp.thermalAmount * 100,
                dp.kineticAmount * 100,
                dp.explosiveAmount * 100
            )

        return out.strip()

    def __deepcopy__(self, memo):
        p = TargetResists(self.emAmount, self.thermalAmount, self.kineticAmount, self.explosiveAmount)
        p.name = "%s copy" % self.name
        return p