# Organization Model Implementation

## Overview
The Organization model has been added to create a hierarchical structure for healthcare facilities. This allows multiple hospitals to be grouped under a parent organization.

## Model Structure

```
Organization (Top-level)
    ├── Hospital (Branch)
    │   ├── Department
    │   │   ├── Physician
    │   │   └── Employee
    │   └── Patient
```

## Organization Model

### Fields
- `name` (CharField) - Organization name (English)
- `name_ar` (CharField) - Organization name (Arabic)
- `code` (CharField) - Unique organization code (indexed)
- `address` (TextField) - Organization address
- `city` (CharField) - Organization city
- `phone` (CharField) - Contact phone number
- `email` (EmailField) - Contact email address
- `website` (URLField) - Organization website URL
- `status` (CharField) - Active/Inactive status (from StatusChoices)
- `logo` (ImageField) - Organization logo image
- `license_number` (CharField) - Organization license number
- `created_at` (DateTimeField) - Auto-populated creation timestamp
- `updated_at` (DateTimeField) - Auto-populated update timestamp

### Relationships
- `hospitals` (One-to-Many) - Related name for Hospital model

## Hospital Model Changes

### New Field
- `organization` (ForeignKey to Organization) - Parent organization (nullable for backward compatibility)

### Backward Compatibility
The `organization` field is nullable to ensure existing hospitals without an organization continue to work.

## Database Migration

### Migration File
- `apps/organizations/migrations/0002_organization_hospital_organization.py`

### Changes Made
1. Created `Organization` model table
2. Added `organization` foreign key to `Hospital` table
3. Migration applied successfully

## Admin Interface

### OrganizationAdmin
- List display: name, code, city, status, created_at
- Filters: status, city
- Search: name, name_ar, code, license_number
- Ordering: by name
- Fieldsets: Basic info, Contact, Details, Metadata

### HospitalAdmin Updates
- Added `organization` field to form
- Added autocomplete for organization selection
- Added `organization_name` to list display (read-only)

## Serializers

### OrganizationSerializer
- Includes `hospitals_count` method field
- Fields: id, name, name_ar, code, address, city, phone, email, website, status, license_number, logo, hospitals_count, created_at, updated_at

### HospitalSerializer Updates
- Added `organization` field
- Added `organization_name` (read-only, from organization.name)
- Added `departments_count` method field
- Fields: id, organization, organization_name, name, name_ar, code, address, city, phone, email, status, license_number, capacity, departments_count, created_at, updated_at

## Data Migration

### Management Command
`python manage.py create_default_organization`

#### Options
- `--name` - Organization name (default: "Default Healthcare Organization")
- `--code` - Organization code (default: "DEFAULT")
- `--force` - Force reassignment of all hospitals
- `--dry-run` - Preview changes without applying

#### Example Usage
```bash
# Create default organization
python manage.py create_default_organization

# Create with custom name and code
python manage.py create_default_organization --name="My Hospital Group" --code="MHG"

# Preview changes
python manage.py create_default_organization --dry-run

# Force reassign all hospitals
python manage.py create_default_organization --force
```

### Current Data
- **Organization**: King Faisal Specialist Hospital Group (KFSHG)
- **Hospital**: Alhammadi Hospital (HH)
- **Departments**: 10
- **Status**: All hospitals assigned to organization

## Verification

### Verification Script
Run `python verify_organization.py` to check:
- Total organizations
- Hospitals per organization
- Departments per hospital
- Orphaned hospitals (without organization)

### Expected Output
```
============================================================
Organization Verification
============================================================

Total Organizations: 1

Organization: King Faisal Specialist Hospital Group (KFSHG)
  Status: active
  Hospitals: 1
    - Alhammadi Hospital (Code: HH)
      Departments: 10

✓ All hospitals have organizations assigned

============================================================
```

## Impact on Other Apps

### Complaints App
- Hospital selection in forms now shows organization context
- Complaints can be filtered by organization via hospital relationship
- No breaking changes - existing functionality preserved

### Surveys App
- Surveys can be filtered by organization
- Patient relationships work through hospital → organization

### Journey Engine
- Journeys can be organized by organization
- Department routing can consider organization context

### Call Center
- Agent dashboard can filter by organization
- Call routing can consider organization hierarchy

### Analytics App
- Reports can be aggregated at organization level
- Multi-hospital analytics available

## Future Enhancements

### Recommended Features
1. **Organization-Level Permissions**
   - Role-based access control at organization level
   - Organization admins managing their hospitals

2. **Organization Settings**
   - Custom branding per organization
   - Organization-specific policies and procedures
   - Organization-level notification settings

3. **Organization Dashboard**
   - Overview of all hospitals in organization
   - Aggregate metrics and KPIs
   - Cross-hospital comparison

4. **Multi-Organization Support**
   - Users can belong to multiple organizations
   - Organization switching in UI
   - Organization-scoped data views

5. **Organization Hierarchy**
   - Sub-organizations (regional, national)
   - Multi-level organization structure
   - Parent/child organization relationships

6. **Organization Templates**
   - Standardized hospital templates
   - Quick setup of new hospitals
   - Consistent policies across organization

## Notes

- All models inherit from `UUIDModel` and `TimeStampedModel` for consistency
- Bilingual support (English/Arabic) maintained throughout
- Status management follows existing `StatusChoices` pattern
- Backward compatible with existing data
- No breaking changes to existing functionality

## References

- Model file: `apps/organizations/models.py`
- Admin file: `apps/organizations/admin.py`
- Serializer file: `apps/organizations/serializers.py`
- Migration: `apps/organizations/migrations/0002_organization_hospital_organization.py`
- Management command: `apps/organizations/management/commands/create_default_organization.py`
