from __future__ import annotations

from pathlib import Path

from django.conf import settings
from django.templatetags.static import static

from .models import PortalBranding


def get_portal_branding() -> PortalBranding:
    branding, _ = PortalBranding.objects.get_or_create(
        name='Default',
        defaults={
            'portal_title': 'TUBCO Onboarding & Offboarding Portal',
            'company_name': 'TUBCO',
            'support_email': 'info@tub.co',
            'default_language': 'de',
            'primary_color': '#000078',
            'secondary_color': '#c0002b',
        },
    )
    return branding


def get_portal_logo_url() -> str:
    branding = get_portal_branding()
    if branding.logo_image:
        try:
            return branding.logo_image.url
        except ValueError:
            pass
    return static('workflows/img/tubco-logo.svg')


def get_portal_letterhead_path() -> Path:
    branding = get_portal_branding()
    if branding.pdf_letterhead:
        try:
            candidate = Path(branding.pdf_letterhead.path)
            if candidate.exists():
                return candidate
        except (ValueError, NotImplementedError):
            pass
    return settings.PDF_TEMPLATES_DIR / 'templates.pdf'


def get_branding_context() -> dict[str, object]:
    branding = get_portal_branding()
    return {
        'portal_branding': branding,
        'portal_title': branding.portal_title,
        'portal_company_name': branding.company_name,
        'portal_support_email': branding.support_email,
        'portal_default_language': branding.default_language,
        'portal_primary_color': branding.primary_color,
        'portal_secondary_color': branding.secondary_color,
        'portal_logo_url': get_portal_logo_url(),
        'portal_has_custom_logo': bool(branding.logo_image),
        'portal_has_custom_letterhead': bool(branding.pdf_letterhead),
    }


def get_branding_email_copy() -> dict[str, str]:
    branding = get_portal_branding()
    company_name = (branding.company_name or 'TUBCO').strip()
    portal_title = (branding.portal_title or f'{company_name} Portal').strip()
    return {
        'company_name': company_name,
        'portal_title': portal_title,
        'support_email': (branding.support_email or '').strip(),
    }


def get_default_notification_templates() -> dict[str, dict[str, str]]:
    from copy import deepcopy

    from .tasks import DEFAULT_NOTIFICATION_TEMPLATES

    templates = deepcopy(DEFAULT_NOTIFICATION_TEMPLATES)
    company_name = get_branding_email_copy()['company_name']
    welcome = templates.get('onboarding_welcome')
    if welcome:
        welcome['subject'] = f'Willkommen bei {company_name}, {{ VORNAME }}'
        welcome['subject_en'] = f'Welcome to {company_name}, {{ VORNAME }}'
        welcome['body'] = (
            'Hallo {{ FULL_NAME }},\n\n'
            f'herzlich willkommen bei {company_name}.\n'
            'Wir freuen uns sehr, dass du ab dem {{ CONTRACT_START }} unser Team in der Abteilung {{ DEPARTMENT }} verstärkst.\n\n'
            'Deine dienstliche E-Mail-Adresse lautet: {{ EMAIL }}.\n'
            'Im Anhang findest du deine Onboarding-Unterlagen als PDF.\n\n'
            'Wenn du Fragen hast, melde dich gerne jederzeit.\n\n'
            'Viele Grüße\n'
            f'{company_name} IT'
        )
        welcome['body_en'] = (
            'Hello {{ FULL_NAME }},\n\n'
            f'welcome to {company_name}.\n'
            'We are very happy that you will join our {{ DEPARTMENT }} team starting on {{ CONTRACT_START }}.\n\n'
            'Your work email address is: {{ EMAIL }}.\n'
            'You will find your onboarding documents attached as a PDF.\n\n'
            'If you have any questions, feel free to contact us anytime.\n\n'
            'Best regards,\n'
            f'{company_name} IT'
        )
    return templates