# Edit Farm Feature - Implementation Summary

## Overview
A complete farm management page has been added to MonsterAgro, allowing farm managers to edit farm details and view farm statistics.

## Files Created

### 1. **edit_farm.html**
- Main page for editing farm details
- Form fields for:
  - Farm Name (required)
  - Location
  - Total Farm Area (hectares)
  - Contact Phone
  - Farm Email
  - Description
- Farm Statistics section showing:
  - Total Equipment count
  - Total Fields count
  - Total Employees count
  - Total Fuel Records count

### 2. **js/edit_farm.js**
- Module for handling farm editing functionality
- Features:
  - Authentication check (only managers and admins can access)
  - Load existing farm data from database
  - Load and display farm statistics
  - Form validation (name required, email format, positive area)
  - Submit handler with error/success messages
  - Auto-redirect on successful update

## Files Modified

### 1. **server.js**
Added three new API endpoints:

#### GET `/api/farms/:id`
- Retrieves farm details by ID
- Returns: id, name, location, area, phone, email, description

#### PUT `/api/farms/:id`
- Updates farm details
- Required: name
- Optional: location, area, phone, email, description
- Returns: success message

#### Updated GET `/api/farms`
- Existing endpoint for listing all farms (unchanged)

### 2. **js/app.js**
- Added "Farm Settings" link to manager navigation menu
- Link appears only for users with status 2 (managers) or 3 (admins)

### 3. **css/style.css**
- Added `.stat-box` styling for statistics display
- Added form styling for edit farm page
- Added button and alert styling

### 4. **docs/MonsterAgro.sql**
- Updated `farms` table schema with new columns:
  - `location` (varchar 100)
  - `area` (double)
  - `phone` (varchar 20)
  - `email` (varchar 100)
  - `description` (text)

## Access Control
- **Employees (status 1)**: Cannot access
- **Managers (status 2)**: Can access and edit their farm
- **Admins (status 3)**: Can access and edit farms

## How to Use

1. **Login** as a manager or admin
2. Click **"Farm Settings"** in the navigation menu
3. Edit any farm details in the form
4. Click **"Save Changes"** to update
5. View farm statistics on the same page

## Database Migration

To apply the schema changes to an existing database, run:

```sql
ALTER TABLE farms ADD COLUMN location VARCHAR(100);
ALTER TABLE farms ADD COLUMN area DOUBLE;
ALTER TABLE farms ADD COLUMN phone VARCHAR(20);
ALTER TABLE farms ADD COLUMN email VARCHAR(100);
ALTER TABLE farms ADD COLUMN description TEXT;
```

## Validation Rules

- **Farm Name**: Required, max 100 characters
- **Location**: Optional, max 100 characters
- **Area**: Optional, must be positive number
- **Phone**: Optional, max 20 characters
- **Email**: Optional, must be valid email format
- **Description**: Optional, unlimited text

## Error Handling

- Authentication failures redirect to login
- Permission errors show message and redirect to home
- Database errors display user-friendly messages
- Form validation prevents invalid submissions
- Success messages auto-redirect after 2 seconds

## Testing

Test with these credentials:
- **Manager**: john@farm.com / pass123
- **Admin**: admin@test.com / admin

Both can access and edit farm details.
