from __future__ import annotations

from django import forms

from .client import CatalogPlugin
from .runtime import RuntimeSettings


class LifecycleConfirmForm(forms.Form):
    confirmation = forms.CharField(
        max_length=64,
        label="Plugin-Slug zur Bestätigung",
        help_text="Diese Eingabe verhindert versehentliche Lifecycle-Aktionen.",
    )
    version = forms.ChoiceField(required=False, label="Version")
    dry_run = forms.BooleanField(
        required=False,
        initial=True,
        label="Nur prüfen (Dry-Run)",
        help_text="Plant und validiert den Vorgang, ohne Dateien oder Prozesse zu verändern.",
    )

    def __init__(
        self,
        *args,
        plugin: CatalogPlugin,
        action: str,
        runtime: RuntimeSettings,
        **kwargs,
    ):
        super().__init__(*args, **kwargs)
        self.plugin = plugin
        self.action = action
        self.runtime = runtime
        self.fields["confirmation"].widget.attrs.update({"autocomplete": "off", "placeholder": plugin.slug})
        self.fields["dry_run"].initial = runtime.default_dry_run
        self.has_installable_release = True
        if action in {"install", "update"}:
            choices = [
                (release.version, release.version)
                for release in plugin.installable_releases(
                    runtime.netbox_version,
                    require_approval_marker=runtime.execution_mode == "agent",
                )
            ]
            choices.sort(reverse=True)
            self.fields["version"].choices = choices
            self.has_installable_release = bool(choices)
            self.fields["version"].required = self.has_installable_release
            self.fields["version"].disabled = not self.has_installable_release
            self.fields["version"].initial = plugin.latest_version
        else:
            self.fields.pop("version")
        for field in self.fields.values():
            if not isinstance(field.widget, forms.CheckboxInput):
                field.widget.attrs.setdefault("class", "form-control")

    def clean_confirmation(self) -> str:
        value = self.cleaned_data["confirmation"]
        if value != self.plugin.slug:
            raise forms.ValidationError("Der Slug stimmt nicht exakt überein.")
        return value

    def clean(self):
        cleaned = super().clean()
        if self.action in {"install", "update"} and not self.has_installable_release:
            raise forms.ValidationError(
                "Keine freigegebene, kompatible Plugin-Version ist verfügbar. "
                "Das Source-Artefakt muss zunächst im Store synchronisiert und freigegeben werden."
            )
        if self.runtime.execution_mode == "dry_run" and not cleaned.get("dry_run", False):
            self.add_error("dry_run", "Reale Aktionen sind in execution_mode=dry_run deaktiviert.")
        return cleaned