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#
#  This program is free software; you can redistribute it and/or
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#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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# <pep8 compliant>

if "bpy" in locals():
    import imp
    imp.reload(settings)
    imp.reload(utils_i18n)
else:
    import bpy
    from bpy.props import (BoolProperty,
                           CollectionProperty,
                           EnumProperty,
                           FloatProperty,
                           FloatVectorProperty,
                           IntProperty,
                           PointerProperty,
                           StringProperty,
                           )
    from . import settings
    from bl_i18n_utils import utils as utils_i18n


import os
import shutil


# A global cache for I18nMessages objects, as parsing po files takes a few seconds.
PO_CACHE = {}


def _get_messages(lang, fname):
    if fname not in PO_CACHE:
        PO_CACHE[fname] = utils_i18n.I18nMessages(uid=lang, kind='PO', key=fname, src=fname, settings=settings.settings)
    return PO_CACHE[fname]


class UI_OT_i18n_edittranslation_update_mo(bpy.types.Operator):
    """Try to "compile" given po file into relevant blender.mo file """ \
    """(WARNING: it will replace the official mo file in your user dir!)"""
    bl_idname = "ui.i18n_edittranslation_update_mo"
    bl_label = "Edit Translation Update Mo"

    # "Parameters"
    lang = StringProperty(description="Current (translated) language",
                          options={'SKIP_SAVE'})
    po_file = StringProperty(description="Path to the matching po file",
                             subtype='FILE_PATH', options={'SKIP_SAVE'})
    clean_mo = BoolProperty(description="Clean up (remove) all local "
                                        "translation files, to be able to use "
                                        "all system's ones again",
                            default=False, options={'SKIP_SAVE'})

    def execute(self, context):
        if self.clean_mo:
            root = bpy.utils.user_resource('DATAFILES', settings.settings.MO_PATH_ROOT_RELATIVE)
            if root:
                shutil.rmtree(root)
        elif not (self.lang and self.po_file):
            return {'CANCELLED'}
        else:
            mo_dir = bpy.utils.user_resource('DATAFILES', settings.settings.MO_PATH_TEMPLATE_RELATIVE.format(self.lang),
                                             create=True)
            mo_file = os.path.join(mo_dir, settings.settings.MO_FILE_NAME)
            _get_messages(self.lang, self.po_file).write(kind='MO', dest=mo_file)

        bpy.ops.ui.reloadtranslation()
        return {'FINISHED'}


class UI_OT_i18n_edittranslation(bpy.types.Operator):
    """Translate the label and tooltip of the property defined by given 'parameters'"""
    bl_idname = "ui.edittranslation"
    bl_label = "Edit Translation"

    # "Parameters"
    but_label = StringProperty(description="Label of the control", options={'SKIP_SAVE'})
    rna_label = StringProperty(description="RNA-defined label of the control, if any", options={'SKIP_SAVE'})
    enum_label = StringProperty(description="Label of the enum item of the control, if any", options={'SKIP_SAVE'})
    but_tip = StringProperty(description="Tip of the control", options={'SKIP_SAVE'})
    rna_tip = StringProperty(description="RNA-defined tip of the control, if any", options={'SKIP_SAVE'})
    enum_tip = StringProperty(description="Tip of the enum item of the control, if any", options={'SKIP_SAVE'})
    rna_struct = StringProperty(description="Identifier of the RNA struct, if any", options={'SKIP_SAVE'})
    rna_prop = StringProperty(description="Identifier of the RNA property, if any", options={'SKIP_SAVE'})
    rna_enum = StringProperty(description="Identifier of the RNA enum item, if any", options={'SKIP_SAVE'})
    rna_ctxt = StringProperty(description="RNA context for label", options={'SKIP_SAVE'})

    lang = StringProperty(description="Current (translated) language", options={'SKIP_SAVE'})
    po_file = StringProperty(description="Path to the matching po file", subtype='FILE_PATH', options={'SKIP_SAVE'})

    # Found in po file.
    org_but_label = StringProperty(description="Original label of the control", options={'SKIP_SAVE'})
    org_rna_label = StringProperty(description="Original RNA-defined label of the control, if any",
                                   options={'SKIP_SAVE'})
    org_enum_label = StringProperty(description="Original label of the enum item of the control, if any",
                                    options={'SKIP_SAVE'})
    org_but_tip = StringProperty(description="Original tip of the control", options={'SKIP_SAVE'})
    org_rna_tip = StringProperty(description="Original RNA-defined tip of the control, if any", options={'SKIP_SAVE'})
    org_enum_tip = StringProperty(description="Original tip of the enum item of the control, if any",
                                  options={'SKIP_SAVE'})

    flag_items = (('FUZZY', "Fuzzy", "Message is marked as fuzzy in po file"),
                  ('ERROR', "Error", "Some error occurred with this message"),
                 )
    but_label_flags = EnumProperty(items=flag_items, description="Flags about the label of the button",
                                   options={'SKIP_SAVE', 'ENUM_FLAG'})
    rna_label_flags = EnumProperty(items=flag_items, description="Flags about the RNA-defined label of the button",
                                   options={'SKIP_SAVE', 'ENUM_FLAG'})
    enum_label_flags = EnumProperty(items=flag_items, description="Flags about the RNA enum item label of the button",
                                    options={'SKIP_SAVE', 'ENUM_FLAG'})
    but_tip_flags = EnumProperty(items=flag_items, description="Flags about the tip of the button",
                                 options={'SKIP_SAVE', 'ENUM_FLAG'})
    rna_tip_flags = EnumProperty(items=flag_items, description="Flags about the RNA-defined tip of the button",
                                 options={'SKIP_SAVE', 'ENUM_FLAG'})
    enum_tip_flags = EnumProperty(items=flag_items, description="Flags about the RNA enum item tip of the button",
                                  options={'SKIP_SAVE', 'ENUM_FLAG'})

    stats_str = StringProperty(description="Stats from opened po", options={'SKIP_SAVE'})
    update_po = BoolProperty(description="Update po file, try to rebuild mo file, and refresh Blender UI",
                             default=False, options={'SKIP_SAVE'})
    update_mo = BoolProperty(description="Try to rebuild mo file, and refresh Blender UI",
                             default=False, options={'SKIP_SAVE'})
    clean_mo = BoolProperty(description="Clean up (remove) all local translation files, to be able to use "
                                        "all system's ones again",
                            default=False, options={'SKIP_SAVE'})

    def execute(self, context):
        if not hasattr(self, "msgmap"):
            self.report('ERROR', "Looks like you did not invoke this operator first!")
            return {'CANCELLED'}

        msgs = _get_messages(self.lang, self.po_file)
        done_keys = set()
        for mmap in self.msgmap.values():
            if 'ERROR' in getattr(self, mmap["msg_flags"]):
                continue
            k = mmap["key"]
#            print(k)
            if k not in done_keys and len(k) == 1:
                k = tuple(k)[0]
                msgs.msgs[k].msgstr = getattr(self, mmap["msgstr"])
                msgs.msgs[k].is_fuzzy = 'FUZZY' in getattr(self, mmap["msg_flags"])
                done_keys.add(k)

        if self.update_po:
            # Try to overwrite po file, may fail if we have no good rights...
            try:
                msgs.write(kind='PO', dest=self.po_file)
            except Exception as e:
                self.report('ERROR', "Could not write to po file ({})".format(str(e)))
            # Always invalidate reverse messages cache afterward!
            msgs.invalidate_reverse_cache()
        if self.update_mo:
            lang = os.path.splitext(os.path.basename(self.po_file))[0]
            bpy.ops.ui.i18n_edittranslation_update_mo(po_file=self.po_file, lang=lang)
        elif self.clean_mo:
            bpy.ops.ui.i18n_edittranslation_update_mo(clean_mo=True)
        return {'FINISHED'}

    def invoke(self, context, event):
        self.msgmap = {"but_label": {"msgstr": "but_label", "msgid": "org_but_label",
                                     "msg_flags": "but_label_flags", "key": set()},
                       "rna_label": {"msgstr": "rna_label", "msgid": "org_rna_label",
                                     "msg_flags": "rna_label_flags", "key": set()},
                       "enum_label": {"msgstr": "enum_label", "msgid": "org_enum_label",
                                      "msg_flags": "enum_label_flags", "key": set()},
                       "but_tip": {"msgstr": "but_tip", "msgid": "org_but_tip",
                                   "msg_flags": "but_tip_flags", "key": set()},
                       "rna_tip": {"msgstr": "rna_tip", "msgid": "org_rna_tip",
                                   "msg_flags": "rna_tip_flags", "key": set()},
                       "enum_tip": {"msgstr": "enum_tip", "msgid": "org_enum_tip",
                                    "msg_flags": "enum_tip_flags", "key": set()},
                      }

        msgs = _get_messages(self.lang, self.po_file)
        msgs.find_best_messages_matches(self, self.msgmap, self.rna_ctxt, self.rna_struct, self.rna_prop, self.rna_enum)
        msgs.update_info()
        self.stats_str = "{}: {} messages, {} translated.".format(os.path.basename(self.po_file), msgs.nbr_msgs,
                                                                  msgs.nbr_trans_msgs)

        for mmap in self.msgmap.values():
            k = tuple(mmap["key"])
            if k:
                if len(k) == 1:
                    k = k[0]
                    ctxt, msgid = k
                    setattr(self, mmap["msgstr"], msgs.msgs[k].msgstr)
                    setattr(self, mmap["msgid"], msgid)
                    if msgs.msgs[k].is_fuzzy:
                        setattr(self, mmap["msg_flags"], {'FUZZY'})
                else:
                    setattr(self, mmap["msgid"],
                            "ERROR: Button label “{}” matches several messages in po file ({})!"
                            "".format(self.but_label, k))
                    setattr(self, mmap["msg_flags"], {'ERROR'})
            else:
                setattr(self, mmap["msgstr"], "")
                setattr(self, mmap["msgid"], "")

        wm = context.window_manager
        return wm.invoke_props_dialog(self, width=600)

    def draw(self, context):
        layout = self.layout
        layout.label(text=self.stats_str)
        src, _a, _b = bpy.utils.make_rna_paths(self.rna_struct, self.rna_prop, self.rna_enum)
        if src:
            layout.label(text="    RNA Path: bpy.types." + src)
        if self.rna_ctxt:
            layout.label(text="    RNA Context: " + self.rna_ctxt)

        if self.org_but_label or self.org_rna_label or self.org_enum_label:
            # XXX Can't use box, labels are not enough readable in them :/
            box = layout.box()
            #box = layout
            box.label(text="Labels:")
            split = box.split(percentage=0.15)
            col1 = split.column()
            col2 = split.column()
            if self.org_but_label:
                col1.label(text="Button Label:")
                row = col2.row()
                row.enabled = False
                if 'ERROR' in self.but_label_flags:
                    row.alert = True
                else:
                    col1.prop_enum(self, "but_label_flags", 'FUZZY', text="Fuzzy")
                    col2.prop(self, "but_label", text="")
                row.prop(self, "org_but_label", text="")
            if self.org_rna_label:
                col1.label(text="RNA Label:")
                row = col2.row()
                row.enabled = False
                if 'ERROR' in self.rna_label_flags:
                    row.alert = True
                else:
                    col1.prop_enum(self, "rna_label_flags", 'FUZZY', text="Fuzzy")
                    col2.prop(self, "rna_label", text="")
                row.prop(self, "org_rna_label", text="")
            if self.org_enum_label:
                col1.label(text="Enum Item Label:")
                row = col2.row()
                row.enabled = False
                if 'ERROR' in self.enum_label_flags:
                    row.alert = True
                else:
                    col1.prop_enum(self, "enum_label_flags", 'FUZZY', text="Fuzzy")
                    col2.prop(self, "enum_label", text="")
                row.prop(self, "org_enum_label", text="")

        if self.org_but_tip or self.org_rna_tip or self.org_enum_tip:
            # XXX Can't use box, labels are not enough readable in them :/
            box = layout.box()
            #box = layout
            box.label(text="Tool Tips:")
            split = box.split(percentage=0.15)
            col1 = split.column()
            col2 = split.column()
            if self.org_but_tip:
                col1.label(text="Button Tip:")
                row = col2.row()
                row.enabled = False
                if 'ERROR' in self.but_tip_flags:
                    row.alert = True
                else:
                    col1.prop_enum(self, "but_tip_flags", 'FUZZY', text="Fuzzy")
                    col2.prop(self, "but_tip", text="")
                row.prop(self, "org_but_tip", text="")
            if self.org_rna_tip:
                col1.label(text="RNA Tip:")
                row = col2.row()
                row.enabled = False
                if 'ERROR' in self.rna_tip_flags:
                    row.alert = True
                else:
                    col1.prop_enum(self, "rna_tip_flags", 'FUZZY', text="Fuzzy")
                    col2.prop(self, "rna_tip", text="")
                row.prop(self, "org_rna_tip", text="")
            if self.org_enum_tip:
                col1.label(text="Enum Item Tip:")
                row = col2.row()
                row.enabled = False
                if 'ERROR' in self.enum_tip_flags:
                    row.alert = True
                else:
                    col1.prop_enum(self, "enum_tip_flags", 'FUZZY', text="Fuzzy")
                    col2.prop(self, "enum_tip", text="")
                row.prop(self, "org_enum_tip", text="")

        row = layout.row()
        row.prop(self, "update_po", text="Save to PO File", toggle=True)
        row.prop(self, "update_mo", text="Rebuild MO File", toggle=True)
        row.prop(self, "clean_mo", text="Erase Local MO files", toggle=True)
