"""
Feedback models - Patient feedback and suggestions management

This module implements the feedback management system that:
- Tracks patient feedback (compliments, suggestions, general feedback)
- Manages feedback workflow (submitted → reviewed → acknowledged → closed)
- Maintains feedback responses and timeline
- Supports attachments and ratings
"""

from django.conf import settings
from django.db import models
from django.utils import timezone

from apps.core.models import PriorityChoices, TimeStampedModel, UUIDModel


class FeedbackType(models.TextChoices):
    """Feedback type choices"""

    COMPLIMENT = "compliment", "Compliment"
    SUGGESTION = "suggestion", "Suggestion"
    GENERAL = "general", "General Feedback"
    INQUIRY = "inquiry", "Inquiry"
    SATISFACTION_CHECK = "satisfaction_check", "Satisfaction Check"


class FeedbackStatus(models.TextChoices):
    """Feedback status choices"""

    SUBMITTED = "submitted", "Submitted"
    REVIEWED = "reviewed", "Reviewed"
    ACKNOWLEDGED = "acknowledged", "Acknowledged"
    CLOSED = "closed", "Closed"


class FeedbackCategory(models.TextChoices):
    """Feedback category choices"""

    CLINICAL_CARE = "clinical_care", "Clinical Care"
    STAFF_SERVICE = "staff_service", "Staff Service"
    FACILITY = "facility", "Facility & Environment"
    COMMUNICATION = "communication", "Communication"
    APPOINTMENT = "appointment", "Appointment & Scheduling"
    BILLING = "billing", "Billing & Insurance"
    FOOD_SERVICE = "food_service", "Food Service"
    CLEANLINESS = "cleanliness", "Cleanliness"
    TECHNOLOGY = "technology", "Technology & Systems"
    OTHER = "other", "Other"


class SentimentChoices(models.TextChoices):
    """Sentiment analysis choices"""

    POSITIVE = "positive", "Positive"
    NEUTRAL = "neutral", "Neutral"
    NEGATIVE = "negative", "Negative"


class Feedback(UUIDModel, TimeStampedModel):
    """
    Feedback model for patient feedback, compliments, and suggestions.

    Workflow:
    1. SUBMITTED - Feedback received
    2. REVIEWED - Being reviewed by staff
    3. ACKNOWLEDGED - Response provided
    4. CLOSED - Feedback closed
    """

    # Patient and encounter information
    patient = models.ForeignKey(
        "organizations.Patient",
        on_delete=models.CASCADE,
        related_name="feedbacks",
        null=True,
        blank=True,
        help_text="Patient who provided feedback (optional for anonymous feedback)",
    )

    # Anonymous feedback support
    is_anonymous = models.BooleanField(default=False)
    contact_name = models.CharField(max_length=200, blank=True)
    contact_email = models.EmailField(blank=True)
    contact_phone = models.CharField(max_length=20, blank=True)

    encounter_id = models.CharField(
        max_length=100, blank=True, db_index=True, help_text="Related encounter ID if applicable"
    )

    # Survey linkage (for satisfaction checks after negative surveys)
    related_survey = models.ForeignKey(
        "surveys.SurveyInstance",
        on_delete=models.SET_NULL,
        null=True,
        blank=True,
        related_name="follow_up_feedbacks",
        help_text="Survey that triggered this satisfaction check feedback",
    )

    # Organization
    hospital = models.ForeignKey("organizations.Hospital", on_delete=models.CASCADE, related_name="feedbacks")
    department = models.ForeignKey(
        "organizations.Department", on_delete=models.SET_NULL, null=True, blank=True, related_name="feedbacks"
    )
    staff = models.ForeignKey(
        "organizations.Staff",
        on_delete=models.SET_NULL,
        null=True,
        blank=True,
        related_name="feedbacks",
        help_text="Staff member being mentioned in feedback",
    )

    # Feedback details
    feedback_type = models.CharField(
        max_length=20, choices=FeedbackType.choices, default=FeedbackType.GENERAL, db_index=True
    )

    title = models.CharField(max_length=500)
    message = models.TextField(help_text="Feedback message")

    # Classification
    category = models.CharField(max_length=50, choices=FeedbackCategory.choices, db_index=True)
    subcategory = models.CharField(max_length=100, blank=True)

    # Rating (1-5 stars)
    rating = models.IntegerField(null=True, blank=True, help_text="Rating from 1 to 5 stars")

    # Priority
    priority = models.CharField(
        max_length=20, choices=PriorityChoices.choices, default=PriorityChoices.MEDIUM, db_index=True
    )

    # Sentiment analysis
    sentiment = models.CharField(
        max_length=20,
        choices=SentimentChoices.choices,
        default=SentimentChoices.NEUTRAL,
        db_index=True,
        help_text="Sentiment analysis result",
    )
    sentiment_score = models.FloatField(
        null=True, blank=True, help_text="Sentiment score from -1 (negative) to 1 (positive)"
    )

    # Status and workflow
    status = models.CharField(
        max_length=20, choices=FeedbackStatus.choices, default=FeedbackStatus.SUBMITTED, db_index=True
    )

    # Assignment
    assigned_to = models.ForeignKey(
        "accounts.User", on_delete=models.SET_NULL, null=True, blank=True, related_name="assigned_feedbacks"
    )
    assigned_at = models.DateTimeField(null=True, blank=True)

    # Review tracking
    reviewed_at = models.DateTimeField(null=True, blank=True)
    reviewed_by = models.ForeignKey(
        "accounts.User", on_delete=models.SET_NULL, null=True, blank=True, related_name="reviewed_feedbacks"
    )

    # Acknowledgment
    acknowledged_at = models.DateTimeField(null=True, blank=True)
    acknowledged_by = models.ForeignKey(
        "accounts.User", on_delete=models.SET_NULL, null=True, blank=True, related_name="acknowledged_feedbacks"
    )

    # Closure
    closed_at = models.DateTimeField(null=True, blank=True)
    closed_by = models.ForeignKey(
        "accounts.User", on_delete=models.SET_NULL, null=True, blank=True, related_name="closed_feedbacks"
    )

    # Flags
    is_featured = models.BooleanField(default=False, help_text="Feature this feedback (e.g., for testimonials)")
    is_public = models.BooleanField(default=False, help_text="Make this feedback public")
    requires_follow_up = models.BooleanField(default=False)

    # Source
    source = models.ForeignKey(
        "px_sources.PXSource",
        on_delete=models.PROTECT,
        related_name="feedbacks",
        null=True,
        blank=True,
        help_text="Source of feedback",
    )

    # Metadata
    metadata = models.JSONField(default=dict, blank=True)

    # Soft delete
    is_deleted = models.BooleanField(default=False, db_index=True)
    deleted_at = models.DateTimeField(null=True, blank=True)
    deleted_by = models.ForeignKey(
        "accounts.User", on_delete=models.SET_NULL, null=True, blank=True, related_name="deleted_feedbacks"
    )

    class Meta:
        ordering = ["-created_at"]
        indexes = [
            models.Index(fields=["status", "-created_at"]),
            models.Index(fields=["hospital", "status", "-created_at"]),
            models.Index(fields=["feedback_type", "-created_at"]),
            models.Index(fields=["sentiment", "-created_at"]),
            models.Index(fields=["is_deleted", "-created_at"]),
        ]
        verbose_name_plural = "Feedback"

    def __str__(self):
        if self.patient:
            return f"{self.title} - {self.patient.get_full_name()} ({self.feedback_type})"
        return f"{self.title} - Anonymous ({self.feedback_type})"

    def get_contact_name(self):
        """Get contact name (patient or anonymous)"""
        if self.patient:
            return self.patient.get_full_name()
        return self.contact_name or "Anonymous"

    def soft_delete(self, user=None):
        """Soft delete feedback"""
        self.is_deleted = True
        self.deleted_at = timezone.now()
        self.deleted_by = user
        self.save(update_fields=["is_deleted", "deleted_at", "deleted_by"])


class FeedbackAttachment(UUIDModel, TimeStampedModel):
    """Feedback attachment (images, documents, etc.)"""

    feedback = models.ForeignKey(Feedback, on_delete=models.CASCADE, related_name="attachments")

    file = models.FileField(upload_to="feedback/%Y/%m/%d/")
    filename = models.CharField(max_length=500)
    file_type = models.CharField(max_length=100, blank=True)
    file_size = models.IntegerField(help_text="File size in bytes")

    uploaded_by = models.ForeignKey(
        "accounts.User", on_delete=models.SET_NULL, null=True, blank=True, related_name="feedback_attachments"
    )

    description = models.TextField(blank=True)

    class Meta:
        ordering = ["-created_at"]

    def __str__(self):
        return f"{self.feedback} - {self.filename}"


class FeedbackResponse(UUIDModel, TimeStampedModel):
    """
    Feedback response/timeline entry.

    Tracks all responses, status changes, and communications.
    """

    feedback = models.ForeignKey(Feedback, on_delete=models.CASCADE, related_name="responses")

    # Response details
    response_type = models.CharField(
        max_length=50,
        choices=[
            ("status_change", "Status Change"),
            ("assignment", "Assignment"),
            ("note", "Internal Note"),
            ("response", "Response to Patient"),
            ("acknowledgment", "Acknowledgment"),
        ],
        db_index=True,
    )

    message = models.TextField()

    # User who made the response
    created_by = models.ForeignKey(
        "accounts.User", on_delete=models.SET_NULL, null=True, related_name="feedback_responses"
    )

    # Status change tracking
    old_status = models.CharField(max_length=20, blank=True)
    new_status = models.CharField(max_length=20, blank=True)

    # Visibility
    is_internal = models.BooleanField(default=False, help_text="Internal note (not visible to patient)")

    # Metadata
    metadata = models.JSONField(default=dict, blank=True)

    class Meta:
        ordering = ["-created_at"]
        indexes = [
            models.Index(fields=["feedback", "-created_at"]),
        ]

    def __str__(self):
        return f"{self.feedback} - {self.response_type} - {self.created_at.strftime('%Y-%m-%d %H:%M')}"


class CommentSourceCategory(models.TextChoices):
    """Source category from IT department data export (Step 0)"""

    APPOINTMENT = "appointment", "Appointment"
    INPATIENT = "inpatient", "Inpatient"
    OUTPATIENT = "outpatient", "Outpatient"


class CommentClassification(models.TextChoices):
    """Comment classification categories (Step 1 — Colors sheet)"""

    HOSPITAL = "hospital", "Hospital"
    MEDICAL = "medical", "Medical"
    NON_MEDICAL = "non_medical", "Non-Medical"
    NURSING = "nursing", "Nursing"
    ER = "er", "ER"
    SUPPORT_SERVICES = "support_services", "Support Services"


class CommentSubCategory(models.TextChoices):
    """Comment sub-categories (Step 1 — Colors sheet dropdown)"""

    PHARMACY = "pharmacy", "Pharmacy"
    RAD = "rad", "RAD"
    LAB = "lab", "LAB"
    PHYSIOTHERAPY = "physiotherapy", "Physiotherapy"
    DOCTORS = "doctors", "Doctors"
    MEDICAL_REPORTS = "medical_reports", "Medical Reports"
    RECEPTION = "reception", "Reception"
    INSURANCE_APPROVALS = "insurance_approvals", "Insurance/Approvals"
    OPD_CLINICS = "opd_clinics", "OPD - Clinics"
    APPOINTMENTS = "appointments", "Appointments"
    IT_APP = "it_app", "IT - App"
    ADMINISTRATION = "administration", "Administration"
    BILLING = "billing", "Billing"
    FACILITIES = "facilities", "Facilities"
    FOOD_SERVICES = "food_services", "Food Services"
    PARKING = "parking", "Parking"
    HOUSEKEEPING = "housekeeping", "Housekeeping"
    OTHER = "other", "Other"


COMMENT_SUB_CATEGORY_MAP = {
    CommentClassification.MEDICAL: [
        CommentSubCategory.PHARMACY,
        CommentSubCategory.RAD,
        CommentSubCategory.LAB,
        CommentSubCategory.PHYSIOTHERAPY,
        CommentSubCategory.DOCTORS,
        CommentSubCategory.MEDICAL_REPORTS,
    ],
    CommentClassification.NON_MEDICAL: [
        CommentSubCategory.RECEPTION,
        CommentSubCategory.INSURANCE_APPROVALS,
        CommentSubCategory.OPD_CLINICS,
        CommentSubCategory.APPOINTMENTS,
        CommentSubCategory.IT_APP,
        CommentSubCategory.ADMINISTRATION,
        CommentSubCategory.BILLING,
    ],
    CommentClassification.NURSING: [],
    CommentClassification.ER: [
        CommentSubCategory.DOCTORS,
        CommentSubCategory.RECEPTION,
    ],
    CommentClassification.SUPPORT_SERVICES: [
        CommentSubCategory.FACILITIES,
        CommentSubCategory.FOOD_SERVICES,
        CommentSubCategory.PARKING,
        CommentSubCategory.HOUSEKEEPING,
    ],
    CommentClassification.HOSPITAL: [],
}


class CommentImport(UUIDModel, TimeStampedModel):
    """
    Tracks IT department comment data imports (Step 0).

    Each import represents a monthly batch of raw patient comments
    exported from the IT system.
    """

    IMPORT_STATUS_CHOICES = [
        ("pending", "Pending"),
        ("processing", "Processing"),
        ("completed", "Completed"),
        ("failed", "Failed"),
    ]

    hospital = models.ForeignKey(
        "organizations.Hospital",
        on_delete=models.CASCADE,
        related_name="comment_imports",
    )

    month = models.IntegerField(help_text="Month number (1-12)")
    year = models.IntegerField(help_text="Year")

    source_file = models.FileField(
        upload_to="comments/imports/%Y/%m/",
        blank=True,
        help_text="Uploaded source file from IT department",
    )

    status = models.CharField(max_length=20, choices=IMPORT_STATUS_CHOICES, default="pending")

    total_rows = models.IntegerField(default=0, help_text="Total rows in the import file")
    imported_count = models.IntegerField(default=0, help_text="Number of comments successfully imported")
    error_count = models.IntegerField(default=0)
    error_log = models.TextField(blank=True)

    imported_by = models.ForeignKey(
        "accounts.User",
        on_delete=models.SET_NULL,
        null=True,
        blank=True,
        related_name="comment_imports",
    )

    class Meta:
        ordering = ["-year", "-month"]
        unique_together = [["hospital", "year", "month"]]
        verbose_name = "Comment Import"
        verbose_name_plural = "Comment Imports"

    def __str__(self):
        return f"{self.hospital} - {self.year}-{self.month:02d} ({self.imported_count} comments)"


class PatientComment(UUIDModel, TimeStampedModel):
    """
    Patient comment from IT department data export.

    Workflow (Steps 0-5):
    - Step 0: Raw import from IT (source_category, comment_text)
    - Step 1: Classification (classification, sub_category, sentiment keywords)
    - Step 2: Department filtering (grouped by department for review)
    - Step 3: Action plan creation (linked action plans)
    - Step 5: Action plan tracking (status, timeframe, evidence)

    One comment can have multiple classifications (multi-category).
    Use PatientCommentClassification for multi-category support.
    """

    comment_import = models.ForeignKey(
        CommentImport,
        on_delete=models.CASCADE,
        related_name="comments",
        null=True,
        blank=True,
        help_text="Import batch this comment came from",
    )

    hospital = models.ForeignKey(
        "organizations.Hospital",
        on_delete=models.CASCADE,
        related_name="patient_comments",
    )

    serial_number = models.IntegerField(null=True, blank=True, help_text="Serial number from the source file")

    source_category = models.CharField(
        max_length=20,
        choices=CommentSourceCategory.choices,
        blank=True,
        db_index=True,
        help_text="Source category from IT export (Appointment/Inpatient/Outpatient)",
    )

    comment_text = models.TextField(help_text="Original comment text (Arabic/English)")

    comment_text_en = models.TextField(blank=True, help_text="English translation of the comment")

    classification = models.CharField(
        max_length=20,
        choices=CommentClassification.choices,
        blank=True,
        db_index=True,
        help_text="Primary classification (Hospital/Medical/Non-Medical/Nursing/ER/Support)",
    )

    sub_category = models.CharField(
        max_length=30,
        choices=CommentSubCategory.choices,
        blank=True,
        db_index=True,
        help_text="Sub-category classification (e.g., Pharmacy, Reception, etc.)",
    )

    negative_keywords = models.TextField(blank=True, help_text="Negative sentiment keywords/phrases extracted")

    positive_keywords = models.TextField(blank=True, help_text="Positive sentiment keywords/phrases extracted")

    gratitude_keywords = models.TextField(blank=True, help_text="Gratitude keywords/phrases extracted")

    suggestions = models.TextField(blank=True, help_text="Suggestion text extracted from the comment")

    sentiment = models.CharField(
        max_length=20,
        choices=SentimentChoices.choices,
        blank=True,
        db_index=True,
        help_text="Overall sentiment classification",
    )

    is_classified = models.BooleanField(
        default=False,
        db_index=True,
        help_text="Whether this comment has been classified",
    )

    mentioned_doctor_name = models.CharField(
        max_length=200,
        blank=True,
        help_text="Name of doctor mentioned in the comment",
    )

    mentioned_doctor_name_en = models.CharField(
        max_length=200,
        blank=True,
        help_text="English name of mentioned doctor",
    )

    frequency = models.IntegerField(
        default=1,
        help_text="How many times this comment/problem has been reported",
    )

    month = models.IntegerField(null=True, blank=True, help_text="Month the comment was collected")

    year = models.IntegerField(null=True, blank=True, help_text="Year the comment was collected")

    metadata = models.JSONField(default=dict, blank=True)

    class Meta:
        ordering = ["-year", "-month", "-serial_number"]
        indexes = [
            models.Index(fields=["hospital", "classification", "sub_category"]),
            models.Index(fields=["hospital", "year", "month"]),
            models.Index(fields=["hospital", "source_category"]),
            models.Index(fields=["sentiment"]),
        ]
        verbose_name = "Patient Comment"
        verbose_name_plural = "Patient Comments"

    def __str__(self):
        text = self.comment_text[:50] if self.comment_text else "No text"
        return f"#{self.serial_number or '—'} {text}"


class CommentActionPlanStatus(models.TextChoices):
    COMPLETED = "completed", "Completed"
    ON_PROCESS = "on_process", "On Process"
    PENDING = "pending", "Pending"


class CommentActionPlan(UUIDModel, TimeStampedModel):
    """
    Action plan derived from classified patient comments (Step 3/5).

    Tracks recommendations/action plans with responsible departments,
    timeframes, and completion status.
    """

    comment = models.ForeignKey(
        PatientComment,
        on_delete=models.CASCADE,
        related_name="action_plans",
        null=True,
        blank=True,
        help_text="Source comment (may be null if aggregated from multiple)",
    )

    hospital = models.ForeignKey(
        "organizations.Hospital",
        on_delete=models.CASCADE,
        related_name="comment_action_plans",
    )

    department = models.ForeignKey(
        "organizations.Department",
        on_delete=models.SET_NULL,
        null=True,
        blank=True,
        related_name="comment_action_plans",
        help_text="Responsible department",
    )

    department_label = models.CharField(
        max_length=200,
        blank=True,
        help_text="Free-text department name (for when no FK exists)",
    )

    problem_number = models.IntegerField(null=True, blank=True, help_text="Problem number within the department")

    comment_text = models.TextField(blank=True, help_text="Related comment text")
    comment_text_en = models.TextField(blank=True, help_text="English translation of the comment")

    frequency = models.IntegerField(default=1, help_text="Number of times this problem was reported")

    recommendation = models.TextField(help_text="Recommendation / Action Plan")

    recommendation_en = models.TextField(blank=True, help_text="English translation of the recommendation")

    responsible_department = models.CharField(
        max_length=200,
        blank=True,
        help_text="Free-text responsible department name",
    )

    status = models.CharField(
        max_length=20,
        choices=CommentActionPlanStatus.choices,
        default=CommentActionPlanStatus.PENDING,
        db_index=True,
    )

    timeframe = models.CharField(
        max_length=100,
        blank=True,
        help_text="Target timeframe (e.g., Q3, 3 months, 2025-Q1)",
    )

    evidences = models.TextField(blank=True, help_text="Evidence of completion / notes")

    month = models.IntegerField(null=True, blank=True)
    year = models.IntegerField(null=True, blank=True)

    class Meta:
        ordering = ["department_label", "problem_number"]
        indexes = [
            models.Index(fields=["hospital", "status"]),
            models.Index(fields=["hospital", "year", "month"]),
        ]
        verbose_name = "Comment Action Plan"
        verbose_name_plural = "Comment Action Plans"

    def __str__(self):
        dept = self.department_label or (self.department.name if self.department else "—")
        return f"{dept} - Problem #{self.problem_number or '—'} ({self.get_status_display()})"