from textual.screen import ModalScreen
from textual.widgets import Label, Select, TabbedContent, TabPane, Switch, Input, Rule, Static
from textual.containers import Vertical, HorizontalGroup, VerticalGroup, VerticalScroll
from textual.binding import Binding


class SettingsScreen(ModalScreen):
    border_title = "Settings"
    DEFAULT_CSS = """
    SettingsScreen {
        align: center middle;

        #window {
            border: panel $primary;
            background: $background;
            width: 65%;
            height: 65%;
            padding: 1;
        }

        TabPane {
            padding: 1;
        }

        Rule {
            color: $boost;
        }

        .thingy {
            margin-top: 2;
            text-style: bold;
        }

        .setting {
            padding: 0 2;
            content-align: center middle;
            margin-bottom: 1;

            .setting-name {
                text-style: bold;
            }

            .setting-desc {
                text-style: dim;
                width: 100%;
                min-width: 30;
            }

            VerticalGroup {
                width: 50%;
                min-width: 20;
                margin-right: 1;
            }

            Select, Input {
                max-width: 30;
            }
        }
    }
    """

    BINDINGS = [
        Binding("escape", "close", "Close")
    ]

    def __init__(self):
        super().__init__()

    def action_close(self):
        self.dismiss()

    def on_switch_changed(self, event: Switch.Changed):
        if event.switch.id == "word-wrap":
            self.app.query_one("#code-editor").soft_wrap = event.value
            self.app.config_handler.set("editor", "word_wrap", str(int(event.value)))
        elif event.switch.id == "line-numbers":
            self.app.query_one("#code-editor").show_line_numbers = event.value
            self.app.config_handler.set("editor", "line_numbers", str(int(event.value)))
        elif event.switch.id == "plugins-enabled":
            self.app.config_handler.set("plugins", "enabled", str(int(event.value)))
            self.notify("Restart for changes to apply.", title="Restart Required", severity="warning")
        elif event.switch.id == "plugins-log":
            self.app.config_handler.set("plugins", "log", str(int(event.value)))
        elif event.switch.has_class("plugin-option"):
            if event.switch.berry_changed_func != None:
                event.switch.berry_changed_func(event.switch.value)

    def on_select_changed(self, event: Select.Changed):
        if event.select.id == "colour-theme":
            self.app.theme = event.value
            self.app.config_handler.set("appearance", "colour_theme", str(event.value))

    def on_input_changed(self, event: Input.Changed):
        if not event.input.is_valid: return

        if event.input.id == "log-timeout":
            self.app.config_handler.set("plugins", "log_timeout", str(event.input.value))
        elif event.input.has_class("plugin-option"):
            if event.input.berry_changed_func != None:
                event.input.berry_changed_func(event.input.value)

    def compose(self):
        with Vertical(id="window") as window:
            window.border_title = "Settings"
            with TabbedContent():
                with TabPane("Appearance"):
                    with VerticalScroll():
                        with HorizontalGroup(classes="setting"):
                            with VerticalGroup():
                                yield Label("Colour Theme", classes="setting-name")
                                yield Label("Colour theme used for the entire Berry app. You can get more themes with plugins!", classes="setting-desc")

                            yield Select.from_values(
                                (theme_name for theme_name in self.app._registered_themes.keys() if theme_name != "textual-ansi"),
                                allow_blank=False,
                                id="colour-theme",
                                value=self.app.theme
                            )


                with TabPane("Editor"):
                    with VerticalScroll():
                        with HorizontalGroup(classes="setting"):
                            with VerticalGroup():
                                yield Label("Word Wrap", classes="setting-name")
                                yield Label("Enable word wrap in the code editor.", classes="setting-desc")
                            yield Switch(value=bool(int(self.app.config_handler.get("editor", "word_wrap"))), id="word-wrap")
                        
                        with HorizontalGroup(classes="setting"):
                            with VerticalGroup():
                                yield Label("Line Numbers", classes="setting-name")
                                yield Label("Show line numbers in the editor.", classes="setting-desc")
                            yield Switch(value=bool(int(self.app.config_handler.get("editor", "line_numbers"))), id="line-numbers")
                with TabPane("Plugins"):
                    with VerticalScroll():
                    
                        with HorizontalGroup(classes="setting"):
                            with VerticalGroup():
                                yield Label("Plugins Enabled", classes="setting-name")
                                yield Label("Enable or disable Lua plugins. This requires a restart.", classes="setting-desc")
                            yield Switch(value=bool(int(self.app.config_handler.get("plugins", "enabled"))), id="plugins-enabled")

                        with HorizontalGroup(classes="setting"):
                            with VerticalGroup():
                                yield Label("Plugins Log", classes="setting-name")
                                yield Label("Show the plugin loader log on startup.", classes="setting-desc")
                            yield Switch(value=bool(int(self.app.config_handler.get("plugins", "log"))), id="plugins-log")
                            
                        with HorizontalGroup(classes="setting"):
                            with VerticalGroup():
                                yield Label("Log Timeout", classes="setting-name")
                                yield Label("How many seconds before the log automatically closes. This gets overriden by the [b]Plugins Log[/] option. The window doesn't automatically close if there was an error. If this is set to -1, the log will not close automatically.", classes="setting-desc")
                            yield Input(value=self.app.config_handler.get("plugins", "log_timeout"), id="log-timeout", type="integer")
                            
                        yield Static("Plugin-defined Settings", classes="thingy")
                        yield Rule(line_style="double")

                        for plugin_section, plugin_settings in self.app.config_handler.plugin_defined_settings.items():
                            yield Static(f"{plugin_section}", classes="thingy")
                            yield Rule()

                            for setting_name, setting in plugin_settings.items():
                                with HorizontalGroup(classes="setting"):
                                    with VerticalGroup():
                                        yield Label(setting_name, classes="setting-name")
                                        yield Label(setting["description"], classes="setting-desc")

                                    value = self.app.config_handler.get(f"plugin_{plugin_section}", setting["option_name"])

                                    new_widget = None
                                    if setting["type"] == bool:
                                        value = bool(int(value))
                                        new_widget = Switch(value=value)
                                    elif setting["type"] == int:
                                        new_widget = Input(value=value, type="integer", placeholder=setting["default_value"])
                                    elif setting["type"] == float:
                                        new_widget = Input(value=value, type="number", placeholder=setting["default_value"])
                                    elif setting["type"] == str:
                                        new_widget = Input(value=value, placeholder=setting["default_value"])
                                    
                                    new_widget.add_class("plugin-option")
                                    setattr(new_widget, "berry_changed_func", setting['on_changed_func'])
                                    yield new_widget