from pydantic import BaseModel, EmailStr
from typing import Optional, List, Literal, Union, Any
from datetime import date, time, datetime
from enum import Enum

# --- USER SCHEMAS ---
class SignupForm(BaseModel):
    email: EmailStr
    password: str
    full_name: str
    # Patients can only register through signup, role is automatically set to 'patient'

class TokenResponse(BaseModel):
    access_token: str
    token_type: str

# --- DOCTOR CREATION SCHEMA (Admin use only) ---
class DoctorCreate(BaseModel):
    license_number: str  # Changed from matricule to license_number for consistency
    email: EmailStr
    password: str
    full_name: str
    specialty: str
    roles: List[Literal['admin', 'doctor', 'patient']] = ['doctor']  # Can have multiple roles

# --- ADMIN CREATION SCHEMA (Admin use only) ---
class AdminCreate(BaseModel):
    email: EmailStr
    password: str
    full_name: str
    roles: List[Literal['admin', 'doctor', 'patient']] = ['admin']  # Can have multiple roles

# --- ADMIN USER MANAGEMENT ---
class AdminUserUpdate(BaseModel):
    full_name: Optional[str] = None
    roles: Optional[List[Literal['admin', 'doctor', 'patient']]] = None
    specialty: Optional[str] = None
    license_number: Optional[str] = None

class AdminPasswordReset(BaseModel):
    new_password: str

# --- PROFILE UPDATE SCHEMA ---
class ProfileUpdate(BaseModel):
    full_name: Optional[str] = None
    phone: Optional[str] = None
    address: Optional[str] = None
    date_of_birth: Optional[str] = None
    gender: Optional[str] = None
    specialty: Optional[str] = None
    license_number: Optional[str] = None

# --- PASSWORD CHANGE SCHEMA ---
class PasswordChange(BaseModel):
    current_password: str
    new_password: str

# --- PASSWORD RESET SCHEMAS ---
class PasswordResetRequest(BaseModel):
    email: EmailStr

class PasswordResetVerify(BaseModel):
    email: EmailStr
    verification_code: str

class PasswordResetConfirm(BaseModel):
    email: EmailStr
    verification_code: str
    new_password: str

# --- CONTACT INFO ---
class ContactInfo(BaseModel):
    email: Optional[EmailStr] = None
    phone: Optional[str] = None

# --- PATIENT SOURCE TYPES ---
class PatientSource(str, Enum):
    EHR = "ehr"                    # Patients from external EHR system
    DIRECT_REGISTRATION = "direct"  # Patients registered directly in the system
    IMPORT = "import"               # Patients imported from other systems
    MANUAL = "manual"               # Manually entered patients
    SYNTHEA = "synthea"            # Patients imported from Synthea
    HAPI_FHIR = "hapi_fhir"        # Patients imported from HAPI FHIR Test Server

# --- PATIENT STATUS ---
class PatientStatus(str, Enum):
    ACTIVE = "active"
    INACTIVE = "inactive"
    ARCHIVED = "archived"
    PENDING = "pending"

# --- PATIENT SCHEMA ---
class PatientCreate(BaseModel):
    full_name: str
    date_of_birth: date
    gender: str
    notes: Optional[str] = ""
    address: Optional[str] = None
    national_id: Optional[str] = None
    blood_type: Optional[str] = None
    allergies: Optional[List[str]] = []
    chronic_conditions: Optional[List[str]] = []
    medications: Optional[List[str]] = []
    emergency_contact_name: Optional[str] = None
    emergency_contact_phone: Optional[str] = None
    insurance_provider: Optional[str] = None
    insurance_policy_number: Optional[str] = None
    contact: Optional[ContactInfo] = None
    # New fields for patient source management
    source: PatientSource = PatientSource.DIRECT_REGISTRATION
    ehr_id: Optional[str] = None  # External EHR system ID
    ehr_system: Optional[str] = None  # Name of the EHR system
    status: PatientStatus = PatientStatus.ACTIVE
    assigned_doctor_id: Optional[str] = None  # Primary doctor assignment
    registration_date: Optional[datetime] = None
    last_visit_date: Optional[datetime] = None
    next_appointment_date: Optional[datetime] = None

class PatientUpdate(BaseModel):
    full_name: Optional[str] = None
    date_of_birth: Optional[date] = None
    gender: Optional[str] = None
    notes: Optional[str] = None
    address: Optional[str] = None
    national_id: Optional[str] = None
    blood_type: Optional[str] = None
    allergies: Optional[List[str]] = None
    chronic_conditions: Optional[List[str]] = None
    medications: Optional[List[str]] = None
    emergency_contact_name: Optional[str] = None
    emergency_contact_phone: Optional[str] = None
    insurance_provider: Optional[str] = None
    insurance_policy_number: Optional[str] = None
    contact: Optional[ContactInfo] = None
    status: Optional[PatientStatus] = None
    assigned_doctor_id: Optional[str] = None
    last_visit_date: Optional[datetime] = None
    next_appointment_date: Optional[datetime] = None

class PatientResponse(BaseModel):
    id: str
    full_name: str
    date_of_birth: Optional[date] = None
    gender: str
    notes: Optional[Union[str, List[dict]]] = []  # Can be string or list of dicts
    address: Optional[str] = None
    national_id: Optional[str] = None
    blood_type: Optional[str] = None
    allergies: List[str] = []
    chronic_conditions: List[str] = []
    medications: Union[List[str], List[dict]] = []  # Can be list of strings or list of dicts
    emergency_contact_name: Optional[str] = None
    emergency_contact_phone: Optional[str] = None
    insurance_provider: Optional[str] = None
    insurance_policy_number: Optional[str] = None
    contact: Optional[ContactInfo] = None
    source: PatientSource
    ehr_id: Optional[str] = None
    ehr_system: Optional[str] = None
    status: PatientStatus
    assigned_doctor_id: Optional[str] = None
    assigned_doctor_name: Optional[str] = None
    registration_date: Optional[datetime] = None
    last_visit_date: Optional[datetime] = None
    next_appointment_date: Optional[datetime] = None
    created_at: datetime
    updated_at: datetime

class PatientListResponse(BaseModel):
    patients: List[PatientResponse]
    total: int
    page: int
    limit: int
    source_filter: Optional[PatientSource] = None
    status_filter: Optional[PatientStatus] = None

# --- APPOINTMENT STATUS ENUM ---
class AppointmentStatus(str, Enum):
    PENDING = "pending"
    CONFIRMED = "confirmed"
    CANCELLED = "cancelled"
    COMPLETED = "completed"
    NO_SHOW = "no_show"

# --- APPOINTMENT TYPE ENUM ---
class AppointmentType(str, Enum):
    CHECKUP = "checkup"
    CONSULTATION = "consultation"
    PROCEDURE = "procedure"
    FOLLOW_UP = "follow_up"
    EMERGENCY = "emergency"
    ROUTINE = "routine"

# --- APPOINTMENT SCHEMAS ---
class AppointmentCreate(BaseModel):
    patient_id: str  # MongoDB ObjectId as string
    doctor_id: str   # MongoDB ObjectId as string
    date: str  # Date as string in 'YYYY-MM-DD' format
    time: str  # Time as string in 'HH:MM:SS' format
    type: AppointmentType = AppointmentType.CONSULTATION
    reason: Optional[str] = None
    notes: Optional[str] = None
    duration: Optional[int] = 30  # Duration in minutes
    status: Optional[AppointmentStatus] = AppointmentStatus.PENDING
    
    # Enhanced patient data fields for comprehensive patient record
    # Personal Information
    patient_full_name: Optional[str] = None
    patient_date_of_birth: Optional[str] = None  # Format: 'YYYY-MM-DD'
    patient_gender: Optional[str] = None
    patient_address: Optional[str] = None
    patient_city: Optional[str] = None
    patient_state: Optional[str] = None
    patient_postal_code: Optional[str] = None
    patient_country: Optional[str] = None
    patient_national_id: Optional[str] = None
    patient_blood_type: Optional[str] = None
    
    # Medical Information
    patient_allergies: Optional[List[str]] = []
    patient_chronic_conditions: Optional[List[str]] = []
    patient_medications: Optional[List[str]] = []
    
    # Emergency Contact
    patient_emergency_contact_name: Optional[str] = None
    patient_emergency_contact_phone: Optional[str] = None
    
    # Insurance Information
    patient_insurance_provider: Optional[str] = None
    patient_insurance_policy_number: Optional[str] = None
    
    # Additional Notes and Encounters
    patient_medical_notes: Optional[str] = None
    patient_previous_encounters: Optional[List[dict]] = []
    patient_symptoms: Optional[List[str]] = []
    patient_vital_signs: Optional[dict] = None  # e.g., {"blood_pressure": "120/80", "temperature": "98.6"}
    patient_lab_results: Optional[List[dict]] = []
    patient_imaging_results: Optional[List[dict]] = []

class AppointmentUpdate(BaseModel):
    date: Optional[str] = None  # Date as string in 'YYYY-MM-DD' format
    time: Optional[str] = None  # Time as string in 'HH:MM:SS' format
    type: Optional[AppointmentType] = None
    reason: Optional[str] = None
    notes: Optional[str] = None
    status: Optional[AppointmentStatus] = None
    duration: Optional[int] = None

class AppointmentResponse(BaseModel):
    id: str
    patient_id: str
    doctor_id: str
    patient_name: str
    doctor_name: str
    date: date
    time: time
    type: AppointmentType
    status: AppointmentStatus
    reason: Optional[str] = None
    notes: Optional[str] = None
    duration: int
    created_at: datetime
    updated_at: datetime

class AppointmentListResponse(BaseModel):
    appointments: List[AppointmentResponse]
    total: int
    page: int
    limit: int

# --- DOCTOR AVAILABILITY SCHEMAS ---
class DoctorAvailabilityCreate(BaseModel):
    doctor_id: str
    day_of_week: int  # 0=Monday, 6=Sunday
    start_time: time
    end_time: time
    is_available: bool = True

class DoctorAvailabilityUpdate(BaseModel):
    start_time: Optional[time] = None
    end_time: Optional[time] = None
    is_available: Optional[bool] = None

class DoctorAvailabilityResponse(BaseModel):
    id: str
    doctor_id: str
    doctor_name: str
    day_of_week: int
    start_time: time
    end_time: time
    is_available: bool

# --- APPOINTMENT SLOT SCHEMAS ---
class AppointmentSlot(BaseModel):
    date: date
    time: time
    is_available: bool
    appointment_id: Optional[str] = None

class AvailableSlotsResponse(BaseModel):
    doctor_id: str
    doctor_name: str
    specialty: str
    date: date
    slots: List[AppointmentSlot]

# --- DOCTOR LIST RESPONSE ---
class DoctorListResponse(BaseModel):
    id: str
    full_name: str
    specialty: str
    license_number: str
    email: str
    phone: Optional[str] = None

# --- MESSAGING SCHEMAS ---
class MessageType(str, Enum):
    TEXT = "text"
    IMAGE = "image"
    FILE = "file"
    SYSTEM = "system"

class MessageStatus(str, Enum):
    SENT = "sent"
    DELIVERED = "delivered"
    READ = "read"
    FAILED = "failed"

class MessageCreate(BaseModel):
    recipient_id: str  # MongoDB ObjectId as string
    content: str
    message_type: MessageType = MessageType.TEXT
    attachment_url: Optional[str] = None
    reply_to_message_id: Optional[str] = None

class MessageUpdate(BaseModel):
    content: Optional[str] = None
    is_archived: Optional[bool] = None

class MessageResponse(BaseModel):
    id: str
    sender_id: str
    recipient_id: str
    sender_name: str
    recipient_name: str
    content: str
    message_type: MessageType
    attachment_url: Optional[str] = None
    reply_to_message_id: Optional[str] = None
    status: MessageStatus
    is_archived: bool = False
    created_at: datetime
    updated_at: datetime
    read_at: Optional[datetime] = None

class ConversationResponse(BaseModel):
    id: str
    participant_ids: List[str]
    participant_names: List[str]
    last_message: Optional[MessageResponse] = None
    unread_count: int = 0
    created_at: datetime
    updated_at: datetime

class ConversationListResponse(BaseModel):
    conversations: List[ConversationResponse]
    total: int
    page: int
    limit: int

class MessageListResponse(BaseModel):
    messages: List[MessageResponse]
    total: int
    page: int
    limit: int
    conversation_id: str

# --- NOTIFICATION SCHEMAS ---
class NotificationType(str, Enum):
    MESSAGE = "message"
    APPOINTMENT = "appointment"
    SYSTEM = "system"
    REMINDER = "reminder"

class NotificationPriority(str, Enum):
    LOW = "low"
    MEDIUM = "medium"
    HIGH = "high"
    URGENT = "urgent"

class NotificationCreate(BaseModel):
    recipient_id: str
    title: str
    message: str
    notification_type: NotificationType
    priority: NotificationPriority = NotificationPriority.MEDIUM
    data: Optional[dict] = None  # Additional data for the notification

class NotificationResponse(BaseModel):
    id: str
    recipient_id: str
    recipient_name: str
    title: str
    message: str
    notification_type: NotificationType
    priority: NotificationPriority
    data: Optional[dict] = None
    is_read: bool = False
    created_at: datetime
    read_at: Optional[datetime] = None

class NotificationListResponse(BaseModel):
    notifications: List[NotificationResponse]
    total: int
    unread_count: int
    page: int
    limit: int