<?php

namespace App\Models;

use App\Services\EstimateService;
use App\Services\Pdf\PdfTemplateUtils;
use App\Support\PdfHtmlSanitizer;
use App\Traits\GeneratesPdfTrait;
use App\Traits\HasCustomFieldsTrait;
use Carbon\Carbon;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Illuminate\Database\Eloquent\Relations\MorphMany;
use Illuminate\Support\Str;
use Spatie\MediaLibrary\HasMedia;
use Spatie\MediaLibrary\InteractsWithMedia;

class Estimate extends Model implements HasMedia
{
    use GeneratesPdfTrait;
    use HasCustomFieldsTrait;
    use HasFactory;
    use InteractsWithMedia;

    public const STATUS_DRAFT = 'DRAFT';

    public const STATUS_SENT = 'SENT';

    public const STATUS_VIEWED = 'VIEWED';

    public const STATUS_EXPIRED = 'EXPIRED';

    public const STATUS_ACCEPTED = 'ACCEPTED';

    public const STATUS_REJECTED = 'REJECTED';

    protected $dates = [
        'created_at',
        'updated_at',
        'deleted_at',
        'estimate_date',
        'expiry_date',
    ];

    protected $appends = [
        'formattedExpiryDate',
        'formattedEstimateDate',
        'estimatePdfUrl',
    ];

    protected $guarded = ['id'];

    protected function casts(): array
    {
        return [
            'total' => 'integer',
            'tax' => 'integer',
            'sub_total' => 'integer',
            'discount' => 'float',
            'discount_val' => 'integer',
            'exchange_rate' => 'float',
        ];
    }

    public function getEstimatePdfUrlAttribute()
    {
        return url('/estimates/pdf/'.$this->unique_hash);
    }

    public function emailLogs(): MorphMany
    {
        return $this->morphMany('App\Models\EmailLog', 'mailable');
    }

    public function items(): HasMany
    {
        return $this->hasMany(EstimateItem::class);
    }

    public function customer(): BelongsTo
    {
        return $this->belongsTo(Customer::class, 'customer_id');
    }

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

    public function company(): BelongsTo
    {
        return $this->belongsTo(Company::class);
    }

    public function currency(): BelongsTo
    {
        return $this->belongsTo(Currency::class);
    }

    public function taxes(): HasMany
    {
        return $this->hasMany(Tax::class);
    }

    public function getFormattedExpiryDateAttribute($value)
    {
        $dateFormat = CompanySetting::getSetting('carbon_date_format', $this->company_id);

        return Carbon::parse($this->expiry_date)->translatedFormat($dateFormat);
    }

    public function getFormattedEstimateDateAttribute($value)
    {
        $dateFormat = CompanySetting::getSetting('carbon_date_format', $this->company_id);

        return Carbon::parse($this->estimate_date)->translatedFormat($dateFormat);
    }

    public function scopeEstimatesBetween($query, $start, $end)
    {
        return $query->whereBetween(
            'estimates.estimate_date',
            [$start->format('Y-m-d'), $end->format('Y-m-d')]
        );
    }

    public function scopeWhereStatus($query, $status)
    {
        return $query->where('estimates.status', $status);
    }

    public function scopeWhereEstimateNumber($query, $estimateNumber)
    {
        return $query->where('estimates.estimate_number', 'LIKE', '%'.$estimateNumber.'%');
    }

    public function scopeWhereEstimate($query, $estimate_id)
    {
        $query->orWhere('id', $estimate_id);
    }

    public function scopeWhereSearch($query, $search)
    {
        foreach (explode(' ', $search) as $term) {
            $query->whereHas('customer', function ($query) use ($term) {
                $query->where('name', 'LIKE', '%'.$term.'%')
                    ->orWhere('contact_name', 'LIKE', '%'.$term.'%')
                    ->orWhere('company_name', 'LIKE', '%'.$term.'%');
            });
        }
    }

    public function scopeApplyFilters($query, array $filters)
    {
        $filters = collect($filters);

        if ($filters->get('search')) {
            $query->whereSearch($filters->get('search'));
        }

        if ($filters->get('estimate_number')) {
            $query->whereEstimateNumber($filters->get('estimate_number'));
        }

        if ($filters->get('status')) {
            $query->whereStatus($filters->get('status'));
        }

        if ($filters->get('estimate_id')) {
            $query->whereEstimate($filters->get('estimate_id'));
        }

        if ($filters->get('from_date') && $filters->get('to_date')) {
            $start = Carbon::createFromFormat('Y-m-d', $filters->get('from_date'));
            $end = Carbon::createFromFormat('Y-m-d', $filters->get('to_date'));
            $query->estimatesBetween($start, $end);
        }

        if ($filters->get('customer_id')) {
            $query->whereCustomer($filters->get('customer_id'));
        }

        if ($filters->get('orderByField') || $filters->get('orderBy')) {
            $field = $filters->get('orderByField') ? $filters->get('orderByField') : 'sequence_number';
            $orderBy = $filters->get('orderBy') ? $filters->get('orderBy') : 'desc';
            $query->whereOrder($field, $orderBy);
        }
    }

    public function scopeWhereOrder($query, $orderByField, $orderBy)
    {
        $query->orderBy($orderByField, $orderBy);
    }

    public function scopeWhereCompany($query)
    {
        $query->where('estimates.company_id', request()->header('company'));
    }

    public function scopeWhereCustomer($query, $customer_id)
    {
        $query->where('estimates.customer_id', $customer_id);
    }

    public function scopePaginateData($query, $limit)
    {
        if ($limit == 'all') {
            return $query->get();
        }

        return $query->paginate($limit);
    }

    public function getPDFData(): mixed
    {
        return app(EstimateService::class)->getPdfData($this);
    }

    public function getCompanyAddress(): string|false
    {
        if ($this->company && (! $this->company->address()->exists())) {
            return false;
        }

        $format = CompanySetting::getSetting('estimate_company_address_format', $this->company_id);

        return $this->getFormattedString($format);
    }

    public function getCustomerShippingAddress(): string|false
    {
        if ($this->customer && (! $this->customer->shippingAddress()->exists())) {
            return false;
        }

        $format = CompanySetting::getSetting('estimate_shipping_address_format', $this->company_id);

        return $this->getFormattedString($format);
    }

    public function getCustomerBillingAddress(): string|false
    {
        if ($this->customer && (! $this->customer->billingAddress()->exists())) {
            return false;
        }

        $format = CompanySetting::getSetting('estimate_billing_address_format', $this->company_id);

        return $this->getFormattedString($format);
    }

    public function getNotes(): string
    {
        return PdfHtmlSanitizer::sanitize($this->getFormattedString($this->notes));
    }

    public function getEmailAttachmentSetting(): bool
    {
        $estimateAsAttachment = CompanySetting::getSetting('estimate_email_attachment', $this->company_id);

        if ($estimateAsAttachment == 'NO') {
            return false;
        }

        return true;
    }

    public function getEmailBody(string $body): string
    {
        $values = array_merge($this->getFieldsArray(), $this->getExtraFields());

        $body = strtr($body, $values);

        return preg_replace('/{(.*?)}/', '', $body);
    }

    public function getExtraFields(): array
    {
        return [
            '{ESTIMATE_DATE}' => $this->formattedEstimateDate,
            '{ESTIMATE_EXPIRY_DATE}' => $this->formattedExpiryDate,
            '{ESTIMATE_NUMBER}' => $this->estimate_number,
            '{ESTIMATE_REF_NUMBER}' => $this->reference_number,
        ];
    }

    /**
     * Map the estimate's template name to the corresponding invoice template name.
     *
     * Falls back to 'invoice1' if the mapped name does not exist in available templates.
     */
    public function getInvoiceTemplateName(): string
    {
        $templateName = Str::replace('estimate', 'invoice', $this->template_name);

        $name = [];

        foreach (PdfTemplateUtils::getFormattedTemplates('invoice') as $template) {
            $name[] = $template['name'];
        }

        if (in_array($templateName, $name) == false) {
            $templateName = 'invoice1';
        }

        return $templateName;
    }

    /**
     * Handle the post-conversion action for this estimate based on company settings.
     *
     * Either deletes the estimate or marks it as accepted, depending on the
     * 'estimate_convert_action' company setting.
     */
    public function checkForEstimateConvertAction(): bool
    {
        $convertEstimateAction = CompanySetting::getSetting(
            'estimate_convert_action',
            $this->company_id
        );

        if ($convertEstimateAction === 'delete_estimate') {
            $this->delete();
        }

        if ($convertEstimateAction === 'mark_estimate_as_accepted') {
            $this->status = self::STATUS_ACCEPTED;
            $this->save();
        }

        return true;
    }
}