<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Builder;
use Illuminate\Database\Eloquent\Relations\BelongsTo;

class WhatsappInviteLog extends BaseModel
{
    protected $table = 'whatsapp_invites_log';

    /**
     * legacy: timestamps disabled (we manage sent_at manually)
     */
    public $timestamps = false;

    protected $fillable = [
        'parent_id',
        'email',
        'class_section_id',
        'link_id',
        'status',
        'error_message',
        'sent_at',
    ];

    protected $casts = [
        'parent_id' => 'integer',
        'class_section_id' => 'integer',
        'link_id' => 'integer',
        'sent_at' => 'datetime',
    ];

    /* ============================================================
     * Status constants (optional but helpful)
     * ============================================================
     */
    public const STATUS_SENT = 'sent';

    public const STATUS_FAILED = 'failed';

    /* ============================================================
     * Relationships (optional)
     * ============================================================
     */

    public function parent(): BelongsTo
    {
        // If "parents" are users in your DB, keep User::class.
        // If you have a Parent model/table, change it accordingly.
        return $this->belongsTo(User::class, 'parent_id');
    }

    public function link(): BelongsTo
    {
        // Link row (whatsapp_group_links)
        return $this->belongsTo(WhatsappGroupLink::class, 'link_id');
    }

    public function classSection(): BelongsTo
    {
        // Adjust keys if your ClassSection model uses a different PK
        return $this->belongsTo(ClassSection::class, 'class_section_id', 'class_section_id');
    }

    /* ============================================================
     * Scopes
     * ============================================================
     */

    public function scopeForParent(Builder $q, int $parentId): Builder
    {
        return $q->where('parent_id', $parentId);
    }

    public function scopeForSection(Builder $q, int $classSectionId): Builder
    {
        return $q->where('class_section_id', $classSectionId);
    }

    public function scopeStatus(Builder $q, string $status): Builder
    {
        return $q->where('status', $status);
    }

    public function scopeLatestFirst(Builder $q): Builder
    {
        return $q->orderByDesc('sent_at')->orderByDesc('id');
    }

    /* ============================================================
     * legacy-compatible helpers
     * ============================================================
     */

    /**
     * Log a successful send.
     */
    public static function logSuccess(
        int $parentId,
        string $email,
        ?int $classSectionId = null,
        ?int $linkId = null
    ): bool {
        static::query()->create([
            'parent_id' => $parentId,
            'email' => $email,
            'class_section_id' => $classSectionId,
            'link_id' => $linkId,
            'status' => self::STATUS_SENT,
            'error_message' => null,
            'sent_at' => now(),
        ]);

        return true;
    }

    /**
     * Log a failure with error message.
     */
    public static function logFailure(
        int $parentId,
        string $email,
        string $error,
        ?int $classSectionId = null,
        ?int $linkId = null
    ): bool {
        static::query()->create([
            'parent_id' => $parentId,
            'email' => $email,
            'class_section_id' => $classSectionId,
            'link_id' => $linkId,
            'status' => self::STATUS_FAILED,
            'error_message' => $error,
            'sent_at' => now(),
        ]);

        return true;
    }

    /**
     * Get logs for a parent and/or section.
     * legacy: getLogs($parentId = null, $classSectionId = null)
     */
    public static function getLogs(?int $parentId = null, ?int $classSectionId = null): array
    {
        $q = static::query();

        if ($parentId) {
            $q->forParent($parentId);
        }
        if ($classSectionId) {
            $q->forSection($classSectionId);
        }

        return $q->latestFirst()->get()->all();
    }

    /* ============================================================
     * Optional validation helper (FormRequest/controller)
     * Mirrors legacy validation intent
     * ============================================================
     */

    public static function rules(bool $updating = false): array
    {
        $req = $updating ? 'sometimes' : 'required';

        return [
            'parent_id' => [$req, 'integer', 'min:1'],
            'email' => [$req, 'email', 'max:255'],
            'status' => [$req, 'string', 'max:20'],
            'class_section_id' => ['nullable', 'integer'],
            'link_id' => ['nullable', 'integer'],
            'error_message' => ['nullable', 'string', 'max:5000'],
            'sent_at' => ['nullable', 'date'],
        ];
    }
}