from django.db import models
from django.utils.translation import get_language, gettext_lazy as _

from .model_account import EmployeeProfile
from .model_shared import REQUEST_STATUS_CHOICES, normalized_language_code


class OnboardingRequest(models.Model):
    STATUS_CHOICES = REQUEST_STATUS_CHOICES

    full_name = models.CharField(max_length=255, verbose_name='Vorname und Nachname')
    gender = models.CharField(max_length=20, blank=True, choices=[('herr', _('Herr')), ('frau', _('Frau')), ('divers', _('Divers'))], verbose_name='Anrede')
    job_title = models.CharField(max_length=255, blank=True, verbose_name='Berufsbezeichnung')
    department = models.CharField(max_length=255, blank=True, verbose_name='Abteilung')
    work_email = models.EmailField(verbose_name='Gewünschte dienstliche E-Mail-Adresse')
    contract_start = models.DateField(verbose_name='Vertragsbeginn')
    employment_type = models.CharField(max_length=20, blank=True, choices=[('befristet', _('befristet')), ('unbefristet', _('unbefristet'))], verbose_name='Beschäftigungsverhältnis')
    employment_end_date = models.DateField(null=True, blank=True, verbose_name='Enddatum (nur bei befristet)')
    handover_date = models.DateField(null=True, blank=True, verbose_name='Gewünschtes Übergabedatum der Geräte')
    order_business_cards = models.BooleanField(default=False, verbose_name='Bestellung Visitenkarten')
    business_card_name = models.CharField(max_length=255, blank=True, verbose_name='Name (Visitenkarte)')
    business_card_title = models.CharField(max_length=255, blank=True, verbose_name='Titel (Visitenkarte)')
    business_card_email = models.EmailField(blank=True, verbose_name='E-Mailadresse (Visitenkarte)')
    business_card_phone = models.CharField(max_length=100, blank=True, verbose_name='Telefonnummer (Visitenkarte)')
    group_mailboxes_required = models.BooleanField(default=False, verbose_name='Gruppenpostfächer erforderlich?')
    group_mailboxes = models.TextField(blank=True, verbose_name='Gruppenpostfächer')
    needed_devices = models.TextField(blank=True, verbose_name='Benötigte Geräte und Gegenstände')
    needed_software = models.TextField(blank=True, verbose_name='Benötigte Software')
    needed_accesses = models.TextField(blank=True, verbose_name='Benötigte Zugänge')
    needed_workspace_groups = models.TextField(blank=True, verbose_name='Benötigte Gruppen im Workspace')
    additional_software_needed = models.BooleanField(default=False, verbose_name='Wird zusätzliche Software benötigt?')
    additional_software = models.TextField(blank=True, verbose_name='Zusätzlich gewünschte Software (ohne Garantie)')
    additional_hardware_needed = models.BooleanField(default=False, verbose_name='Wird zusätzliche Hardware benötigt?')
    additional_hardware = models.TextField(blank=True, verbose_name='Zusätzliche Hardware')
    additional_hardware_other = models.TextField(blank=True, verbose_name='Weitere Hardware (Freitext)')
    additional_access_needed = models.BooleanField(default=False, verbose_name='Werden weitere Zugänge benötigt?')
    additional_access_text = models.TextField(blank=True, verbose_name='Weitere Zugänge (Freitext)')
    needed_resources = models.TextField(blank=True, verbose_name='Benötigte Ressourcen')
    phone_number = models.CharField(max_length=100, blank=True, verbose_name='Telefon-Direktwahl')
    successor_required = models.BooleanField(default=False, verbose_name='Neue Mitarbeitende ist Nachfolge von?')
    successor_name = models.CharField(max_length=255, blank=True, verbose_name='Name der Vorgängerperson')
    inherit_phone_number = models.BooleanField(default=False, verbose_name='Telefonnummer von Vorgängerperson übernehmen')
    additional_notes = models.TextField(blank=True, verbose_name='Raum für zusätzliche Anmerkungen und Wünsche')
    onboarded_by_email = models.EmailField(blank=True, verbose_name='E-Mail der anfordernden Person')
    onboarded_by_name = models.CharField(max_length=255, blank=True, verbose_name='Name der anfordernden Person')
    agreement = models.TextField(blank=True, verbose_name='Vereinbarung')
    signature_url = models.URLField(blank=True, verbose_name='Unterschrift')
    signature_image = models.ImageField(upload_to='signatures/', blank=True, null=True, verbose_name='Unterschrift (Bilddatei)')
    personalized_text = models.TextField(blank=True, verbose_name='Personalisierter Text für PDF', help_text='Optionaler individueller Textblock im Onboarding PDF.')
    custom_field_values = models.JSONField(default=dict, blank=True)
    generated_pdf_path = models.CharField(max_length=500, blank=True)
    intro_pdf_path = models.CharField(max_length=500, blank=True)
    processing_status = models.CharField(max_length=20, choices=STATUS_CHOICES, default='submitted')
    last_error = models.TextField(blank=True)
    preferred_language = models.CharField(max_length=10, blank=True, default='de', db_default='de')
    created_at = models.DateTimeField(auto_now_add=True)

    def __str__(self) -> str:
        return f'Onboarding #{self.id} - {self.full_name}'

    def save(self, *args, **kwargs):
        self.preferred_language = normalized_language_code(self.preferred_language)
        super().save(*args, **kwargs)


class ScheduledWelcomeEmail(models.Model):
    STATUS_CHOICES = [
        ('scheduled', _('Geplant')),
        ('paused', _('Pausiert')),
        ('cancelled', _('Abgebrochen')),
        ('sent', _('Gesendet')),
        ('failed', _('Fehlgeschlagen')),
    ]

    onboarding_request = models.OneToOneField(OnboardingRequest, on_delete=models.CASCADE)
    recipient_email = models.EmailField()
    send_at = models.DateTimeField()
    status = models.CharField(max_length=20, choices=STATUS_CHOICES, default='scheduled')
    celery_task_id = models.CharField(max_length=100, blank=True)
    sent_at = models.DateTimeField(null=True, blank=True)
    last_error = models.TextField(blank=True)
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    class Meta:
        ordering = ['-send_at', '-id']

    def __str__(self) -> str:
        return f'Welcome #{self.id} | {self.recipient_email} | {self.status}'


class IntroChecklistItem(models.Model):
    SECTION_CHOICES = [
        ('workplace', _('Geräte und Arbeitsplatz')),
        ('accounts', _('Konten und Berechtigungen')),
        ('software', _('Software und Tools')),
        ('process', _('Prozesse und Hinweise')),
    ]
    OPERATOR_CHOICES = [
        ('always', _('Immer anzeigen')),
        ('contains', _('Enthält')),
        ('equals', _('Ist gleich')),
        ('is_true', _('Ist Ja / aktiv')),
        ('is_false', _('Ist Nein / inaktiv')),
    ]

    section = models.CharField(max_length=30, choices=SECTION_CHOICES)
    label = models.CharField(max_length=255)
    label_en = models.CharField(max_length=255, blank=True)
    sort_order = models.PositiveIntegerField(default=0)
    is_active = models.BooleanField(default=True)
    condition_field = models.CharField(max_length=80, blank=True)
    condition_operator = models.CharField(max_length=20, choices=OPERATOR_CHOICES, default='always')
    condition_value = models.CharField(max_length=255, blank=True)

    class Meta:
        ordering = ['section', 'sort_order', 'label']

    def __str__(self) -> str:
        return f'{self.get_section_display()}: {self.label}'

    def translated_label(self, language_code: str | None = None) -> str:
        lang = (language_code or get_language() or 'de').split('-')[0]
        if lang == 'en' and self.label_en.strip():
            return self.label_en.strip()
        return self.label.strip()


class OnboardingIntroductionSession(models.Model):
    STATUS_CHOICES = [('draft', _('Entwurf')), ('completed', _('Abgeschlossen'))]

    onboarding_request = models.OneToOneField(OnboardingRequest, on_delete=models.CASCADE)
    checklist_state = models.JSONField(default=dict, blank=True)
    notes = models.TextField(blank=True)
    status = models.CharField(max_length=20, choices=STATUS_CHOICES, default='draft')
    completed_at = models.DateTimeField(null=True, blank=True)
    completed_by_name = models.CharField(max_length=255, blank=True)
    exported_pdf_path = models.CharField(max_length=500, blank=True)
    updated_at = models.DateTimeField(auto_now=True)
    created_at = models.DateTimeField(auto_now_add=True)

    def __str__(self) -> str:
        return f'Einweisung #{self.id} | {self.onboarding_request.full_name} | {self.status}'


class OffboardingRequest(models.Model):
    STATUS_CHOICES = REQUEST_STATUS_CHOICES

    employee_profile = models.ForeignKey(EmployeeProfile, null=True, blank=True, on_delete=models.SET_NULL)
    full_name = models.CharField(max_length=255, verbose_name='Vorname und Nachname')
    work_email = models.EmailField(verbose_name='Dienstliche E-Mail-Adresse')
    department = models.CharField(max_length=255, blank=True, verbose_name='Abteilung')
    job_title = models.CharField(max_length=255, blank=True, verbose_name='Berufsbezeichnung')
    last_working_day = models.DateField(verbose_name='Letzter Arbeitstag')
    offboarding_reason = models.TextField(blank=True, verbose_name='Grund')
    notes = models.TextField(blank=True, verbose_name='Notizen')
    signature = models.CharField(max_length=255, blank=True, verbose_name='Unterschrift (Name)')
    requested_by_email = models.EmailField(verbose_name='E-Mail der anfordernden Person')
    requested_by_name = models.CharField(max_length=255, blank=True, verbose_name='Name der anfordernden Person')
    preferred_language = models.CharField(max_length=10, blank=True, default='de', db_default='de')
    generated_pdf_path = models.CharField(max_length=500, blank=True)
    custom_field_values = models.JSONField(default=dict, blank=True)
    processing_status = models.CharField(max_length=20, choices=STATUS_CHOICES, default='submitted')
    last_error = models.TextField(blank=True)
    created_at = models.DateTimeField(auto_now_add=True)

    def __str__(self) -> str:
        return f'Offboarding #{self.id} - {self.full_name}'

    def save(self, *args, **kwargs):
        self.preferred_language = normalized_language_code(self.preferred_language)
        super().save(*args, **kwargs)