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

from .course import Course
from apps.account.models import User


class CourseLiveSession(models.Model):
    course = models.ForeignKey(
        Course,
        on_delete=models.CASCADE,
        related_name="live_sessions",
        verbose_name=_("Course"),
        help_text=_("Course that this live session belongs to."),
    )
    room_id = models.CharField(
        max_length=255,
        verbose_name=_("Room ID"),
        help_text=_("Identifier of the PlugNMeet room."),
        unique=True,
        null=True,
        blank=True,
    )
    subject = models.CharField(
        max_length=255,
        verbose_name=_("Subject"),
        help_text=_("Topic of the live session."),
    )
    started_at = models.DateTimeField(
        verbose_name=_("Started At"),
        help_text=_("Start time of the live session."),
    )
    ended_at = models.DateTimeField(
        verbose_name=_("Ended At"),
        help_text=_("End time of the live session."),
        null=True,
        blank=True,
    )
    recorded_file = models.FileField(
        upload_to="live_session_recordings/",
        verbose_name=_("Recorded File"),
        help_text=_("Recorded file of the live session."),
        null=True,
        blank=True,
    )
    created_at = models.DateTimeField(auto_now_add=True, verbose_name=_("Created At"))
    updated_at = models.DateTimeField(auto_now=True, verbose_name=_("Updated At"))

    def __str__(self):
        return f"{self.course} - {self.subject}"

    class Meta:
        ordering = ("-started_at", "-id")
        verbose_name = _("Course Live Session")
        verbose_name_plural = _("Course Live Sessions")
        indexes = [
            models.Index(fields=["course", "started_at"]),
            models.Index(fields=["course", "created_at"]),
            models.Index(fields=["room_id"]),
        ]


USER_ROLE_CHOICES = (
    ("participant", _("Participant")),
    ("moderator", _("Moderator")),
    ("observer", _("Observer")),
)



class LiveSessionUser(models.Model):
    session = models.ForeignKey(
        CourseLiveSession,
        on_delete=models.CASCADE,
        related_name="user_sessions",
        verbose_name=_("Live Session"),
        help_text=_("Live session that the user joined."),
    )
    user = models.ForeignKey(
        User,
        on_delete=models.CASCADE,
        related_name="live_session_entries",
        verbose_name=_("User"),
        help_text=_("User participating in the live session."),
    )
    role = models.CharField(
        max_length=50,
        choices=USER_ROLE_CHOICES,
        verbose_name=_("Role"),
        help_text=_("Role of the user in the session"),
    )
    entered_at = models.DateTimeField(
        verbose_name=_("Entered At"),
        help_text=_("Time the user entered the session"),
    )
    exited_at = models.DateTimeField(
        verbose_name=_("Exited At"),
        help_text=_("Time the user exited the session"),
        null=True,
        blank=True,
        default=None,
    )
    is_online = models.BooleanField(
        default=True,
        verbose_name=_("Is online"),
        help_text=_("Is the user currently online?"),
    )
    created_at = models.DateTimeField(auto_now_add=True, verbose_name=_("Created At"))
    updated_at = models.DateTimeField(auto_now=True, verbose_name=_("Updated At"))

    def __str__(self):
        return f"{self.user} @ {self.session}"

    class Meta:
        verbose_name = _("User Session")
        verbose_name_plural = _("User Sessions")
        ordering = ("-entered_at", "-id")
        indexes = [
            models.Index(fields=["session", "user"]),
            models.Index(fields=["session", "is_online"]),
            models.Index(fields=["user", "is_online"]),
        ]
        unique_together = ("session", "user", "entered_at")


RECORDING_TYPE_CHOICES = (
    ("voice", _("Voice")),
    ("video", _("Video")),
)



class LiveSessionRecording(models.Model):
    session = models.ForeignKey(
        CourseLiveSession,
        on_delete=models.CASCADE,
        related_name="recordings",
        verbose_name=_("Live Session"),
        help_text=_("Live session that this recording belongs to."),
    )
    title = models.CharField(
        max_length=255,
        verbose_name=_("Title"),
        help_text=_("Title of the recording"),
    )
    file = models.FileField(
        upload_to="recorded_sessions/",
        verbose_name=_("Recording File"),
        help_text=_("File of the recorded session"),
    )
    file_time = models.DurationField(
        verbose_name=_("File Duration"),
        help_text=_("Duration of the recording file"),
        null=True,
        blank=True,
    )
    recording_type = models.CharField(
        max_length=10,
        choices=RECORDING_TYPE_CHOICES,
        verbose_name=_("Recording Type"),
        help_text=_("Type of the recording (voice or video)"),
    )
    thumbnail = models.ImageField(
        upload_to="recording_thumbnails/",
        verbose_name=_("Thumbnail"),
        help_text=_("Thumbnail image for video recordings"),
        null=True,
        blank=True,
    )
    created_at = models.DateTimeField(auto_now_add=True, verbose_name=_("Created At"), help_text=_("Time the recording was created"))
    updated_at = models.DateTimeField(auto_now=True, verbose_name=_("Updated At"), help_text=_("The datetime when the recording was last updated"))
    is_active = models.BooleanField(
        default=True,
        verbose_name=_("Is Active"),
        help_text=_("Whether this recording is active or not"),
    )

    def __str__(self):
        meet_id = getattr(self.session, "meet_id", self.session_id)
        return f"meet:<{meet_id}><{self.id}>{self.title} - {self.recording_type}"

    class Meta:
        verbose_name = _("Live Session Recording")
        verbose_name_plural = _("Live Session Recordings")
        ordering = ("-created_at", "-id")
        indexes = [
            models.Index(fields=["session", "is_active"]),
            models.Index(fields=["session", "recording_type"]),
        ]