<?php

namespace App\Models;

use CodeIgniter\Model;

/**
 * Activity Model
 */
class SalesActivityModel extends Model
{
    protected $table            = 'sales_activities';
    protected $primaryKey       = 'activity_id';
    protected $useAutoIncrement = true;
    protected $returnType       = 'array';
    protected $useSoftDeletes   = false;
    protected $protectFields    = true;
    protected $allowedFields    = [
        'lead_id',
        'activity_type',
        'notes',
        'scheduled_date',
        'assigned_to',
        'status',
        'completion_notes',
        'completed_date',
        'parent_activity_id',
        'created_by',
        'updated_by'
    ];

    // Dates
    protected $useTimestamps = true;
    protected $dateFormat    = 'datetime';
    protected $createdField  = 'created_at';
    protected $updatedField  = 'updated_at';

    // Validation
    protected $validationRules = [
        'lead_id'        => 'required|integer',
        'activity_type'  => 'required|in_list[Call,Email,Meeting,Demo,Share,Todo]',
        'notes'          => 'required',
        'scheduled_date' => 'required|valid_date',
        'assigned_to'    => 'required|integer',
        'status'         => 'in_list[pending,completed]',
    ];

    protected $validationMessages = [
        'lead_id' => [
            'required' => 'Lead ID is required',
        ],
        'activity_type' => [
            'required' => 'Activity type is required',
        ],
        'notes' => [
            'required' => 'Activity notes are required',
        ],
    ];

    protected $skipValidation = false;

    /**
     * Get activities by lead with user details
     */
    public function getActivitiesByLead($leadId, $status = null)
    {
        $builder = $this->select('activities.*, user_profiles.username as assigned_to_name')
            ->join('user_profiles', 'user_profiles.id = activities.assigned_to', 'left')
            ->where('activities.lead_id', $leadId);

        if ($status) {
            $builder->where('activities.status', $status);
        }

        return $builder->orderBy('activities.scheduled_date', 'DESC')->findAll();
    }

    /**
     * Get all activities with filters
     */
    public function getActivitiesWithFilters($filters = [], $limit = 10, $offset = 0)
    {
        $builder = $this->select('activities.*, actual_leads.company_name, user_profiles.username as assigned_to_name')
            ->join('actual_leads', 'actual_leads.lead_id = activities.lead_id', 'left')
            ->join('user_profiles', 'user_profiles.id = activities.assigned_to', 'left');

        if (!empty($filters['status'])) {
            $builder->where('activities.status', $filters['status']);
        }

        if (!empty($filters['activity_type'])) {
            $builder->where('activities.activity_type', $filters['activity_type']);
        }

        if (!empty($filters['assigned_to'])) {
            $builder->where('activities.assigned_to', $filters['assigned_to']);
        }

        if (!empty($filters['date_from'])) {
            $builder->where('activities.scheduled_date >=', $filters['date_from']);
        }

        if (!empty($filters['date_to'])) {
            $builder->where('activities.scheduled_date <=', $filters['date_to']);
        }

        return [
            'data'  => $builder->orderBy('activities.scheduled_date', 'DESC')
                ->limit($limit, $offset)->findAll(),
            'total' => $builder->countAllResults(false)
        ];
    }

    /**
     * Complete an activity
     */
    public function completeActivity($activityId, $completionData)
    {
        return $this->update($activityId, [
            'status'           => 'completed',
            'completion_notes' => $completionData['completion_notes'],
            'completed_date'   => date('Y-m-d H:i:s'),
            'updated_by'       => $completionData['updated_by'] ?? null
        ]);
    }

    /**
     * Get pending activities count by user
     */
    public function getPendingActivitiesCount($userId)
    {
        return $this->where('assigned_to', $userId)
            ->where('status', 'pending')
            ->where('scheduled_date <=', date('Y-m-d H:i:s'))
            ->countAllResults();
    }

    /**
     * Get upcoming activities for a user
     */
    public function getUpcomingActivities($userId, $days = 7, $limit = 10)
    {
        $endDate = date('Y-m-d H:i:s', strtotime("+{$days} days"));

        return $this->select('activities.*, actual_leads.company_name')
            ->join('actual_leads', 'actual_leads.lead_id = activities.lead_id', 'left')
            ->where('activities.assigned_to', $userId)
            ->where('activities.status', 'pending')
            ->where('activities.scheduled_date <=', $endDate)
            ->orderBy('activities.scheduled_date', 'ASC')
            ->limit($limit)
            ->findAll();
    }

    /**
     * Get activity timeline for a lead
     */
    public function getActivityTimeline($leadId)
    {
        return $this->select('activities.*, user_profiles.username as assigned_to_name')
            ->join('user_profiles', 'user_profiles.id = activities.assigned_to', 'left')
            ->where('activities.lead_id', $leadId)
            ->orderBy('activities.scheduled_date', 'DESC')
            ->findAll();
    }
}