# SPDX-License-Identifier: GPL-2.0-or-later
from __future__ import annotations

import bpy
from bpy.types import Operator
from bpy.props import (
    BoolProperty,
    StringProperty,
)


def _lang_module_get(sc):
    return __import__("console_" + sc.language,
                      # for python 3.3, maybe a bug???
                      level=0)


class ConsoleExec(Operator):
    """Execute the current console line as a python expression"""
    bl_idname = "console.execute"
    bl_label = "Console Execute"
    bl_options = {'UNDO_GROUPED'}

    interactive: BoolProperty(
        options={'SKIP_SAVE'},
    )

    @classmethod
    def poll(cls, context):
        return (context.area and context.area.type == 'CONSOLE')

    def execute(self, context):
        sc = context.space_data

        module = _lang_module_get(sc)
        execute = getattr(module, "execute", None)

        if execute is not None:
            return execute(context, self.interactive)
        else:
            print("Error: bpy.ops.console.execute_%s - not found" %
                  sc.language)
            return {'FINISHED'}


class ConsoleAutocomplete(Operator):
    """Evaluate the namespace up until the cursor and give a list of """ \
        """options or complete the name if there is only one"""
    bl_idname = "console.autocomplete"
    bl_label = "Console Autocomplete"

    @classmethod
    def poll(cls, context):
        return (context.area and context.area.type == 'CONSOLE')

    def execute(self, context):
        sc = context.space_data
        module = _lang_module_get(sc)
        autocomplete = getattr(module, "autocomplete", None)

        if autocomplete:
            return autocomplete(context)
        else:
            print("Error: bpy.ops.console.autocomplete_%s - not found" %
                  sc.language)
            return {'FINISHED'}


class ConsoleCopyAsScript(Operator):
    """Copy the console contents for use in a script"""
    bl_idname = "console.copy_as_script"
    bl_label = "Copy to Clipboard (as Script)"

    @classmethod
    def poll(cls, context):
        return (context.area and context.area.type == 'CONSOLE')

    def execute(self, context):
        sc = context.space_data

        module = _lang_module_get(sc)
        copy_as_script = getattr(module, "copy_as_script", None)

        if copy_as_script:
            return copy_as_script(context)
        else:
            print("Error: copy_as_script - not found for %r" %
                  sc.language)
            return {'FINISHED'}


class ConsoleBanner(Operator):
    """Print a message when the terminal initializes"""
    bl_idname = "console.banner"
    bl_label = "Console Banner"

    @classmethod
    def poll(cls, context):
        return (context.area and context.area.type == 'CONSOLE')

    def execute(self, context):
        sc = context.space_data

        # default to python
        if not sc.language:
            sc.language = "python"

        module = _lang_module_get(sc)
        banner = getattr(module, "banner", None)

        if banner:
            return banner(context)
        else:
            print("Error: bpy.ops.console.banner_%s - not found" %
                  sc.language)
            return {'FINISHED'}


class ConsoleLanguage(Operator):
    """Set the current language for this console"""
    bl_idname = "console.language"
    bl_label = "Console Language"

    language: StringProperty(
        name="Language",
        maxlen=32,
    )

    @classmethod
    def poll(cls, context):
        return (context.area and context.area.type == 'CONSOLE')

    def execute(self, context):
        sc = context.space_data

        # default to python
        sc.language = self.language

        bpy.ops.console.banner()

        # insert a new blank line
        bpy.ops.console.history_append(text="", current_character=0,
                                       remove_duplicates=True)

        return {'FINISHED'}


classes = (
    ConsoleAutocomplete,
    ConsoleBanner,
    ConsoleCopyAsScript,
    ConsoleExec,
    ConsoleLanguage,
)
