<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Builder;
use App\Models\Invoice;

class AdditionalCharge extends Model
{
    protected $table = 'additional_charges';
    protected $primaryKey = 'id';
    public $timestamps = true;
    protected $fillable = [
        'parent_id',
        'invoice_id',
        'school_year',
        'semester',
        'charge_type',
        'title',
        'description',
        'amount',
        'due_date',
        'status',
        'created_by',
        'created_at',
        'updated_at',
    ];

    protected $casts = [
        'parent_id'   => 'integer',
        'invoice_id'  => 'integer',
        'amount'      => 'decimal:2',
        'created_by'  => 'integer',
        'due_date'    => 'date',
    ];

    /*
    |--------------------------------------------------------------------------
    | Relationships
    |--------------------------------------------------------------------------
    */

    public function parent()
    {
        return $this->belongsTo(User::class, 'parent_id');
    }

    public function invoice()
    {
        return $this->belongsTo(Invoice::class, 'invoice_id');
    }

    public function creator()
    {
        return $this->belongsTo(User::class, 'created_by');
    }


    /*
    |--------------------------------------------------------------------------
    | Custom Query Scopes (CI equivalent of byParentTerm)
    |--------------------------------------------------------------------------
    */

    public function scopeByParentTerm(Builder $query, int $parentId, string $year, string $semester, ?string $status = null)
    {
        $query->where('parent_id', $parentId)
              ->where('school_year', $year)
              ->where('semester', $semester);

        if ($status !== null) {
            $query->where('status', $status);
        }

        return $query->orderBy('id', 'DESC');
    }


    /*
    |--------------------------------------------------------------------------
    | Custom Methods
    |--------------------------------------------------------------------------
    */

    public function markApplied($ids, int $invoiceId): bool
    {
        $ids = is_array($ids) ? $ids : [$ids];

        if (empty($ids)) {
            return true;
        }

        $ids = array_map('intval', $ids);

        return $this->whereIn('id', $ids)
            ->update([
                'status' => 'applied',
                'invoice_id' => $invoiceId
            ]) >= 0;
    }


    /*
    |--------------------------------------------------------------------------
    | Pagination Search (CI paginate alternative)
    |--------------------------------------------------------------------------
    */

    public function listAllForTerm(
        string $schoolYear,
        string $semester,
        ?string $status = null,
        ?string $q = null,
        int $perPage = 50,
        bool $fallbackToYear = true
    )
    {
        $build = function (?string $semesterFilter) use ($schoolYear, $status, $q) {
            $query = self::query()
                ->select('additional_charges.*')
                ->selectRaw("CONCAT(COALESCE(users.lastname,''), ', ', COALESCE(users.firstname,'')) AS parent_name")
                ->selectRaw('invoices.invoice_number')
                ->leftJoin('users', 'users.id', '=', 'additional_charges.parent_id')
                ->leftJoin('invoices', 'invoices.id', '=', 'additional_charges.invoice_id')
                ->where('additional_charges.school_year', $schoolYear);

            if ($semesterFilter !== null && $semesterFilter !== '') {
                $query->where('additional_charges.semester', $semesterFilter);
            }

            if (!empty($status)) {
                $query->where('additional_charges.status', $status);
            }

            if (!empty($q)) {
                $query->where(function ($sub) use ($q) {
                    $sub->where('additional_charges.title', 'like', "%$q%")
                        ->orWhere('additional_charges.description', 'like', "%$q%")
                        ->orWhere('users.firstname', 'like', "%$q%")
                        ->orWhere('users.lastname', 'like', "%$q%")
                        ->orWhere('invoices.invoice_number', 'like', "%$q%");
                });
            }

            return $query;
        };

        $result = $build($semester)
            ->orderBy('additional_charges.id', 'DESC')
            ->paginate($perPage);

        if ($fallbackToYear && $result->count() === 0 && $semester !== '') {
            $result = $build(null)
                ->orderBy('additional_charges.id', 'DESC')
                ->paginate($perPage);
        }

        return $result;
    }
}