<?php

namespace Modules\Conversation\Database\Seeders;

use Illuminate\Database\Seeder;
use Illuminate\Support\Facades\Schema;
use Modules\Conversation\App\Models\Conversation;
use Modules\Conversation\App\Models\ConversationMessage;
use Modules\Listing\Models\Listing;
use Modules\User\App\Models\User;
use Modules\User\App\Support\DemoUserCatalog;

class ConversationDemoSeeder extends Seeder
{
    public function run(): void
    {
        if (! $this->conversationTablesExist()) {
            return;
        }

        $users = User::query()
            ->whereIn('email', DemoUserCatalog::emails())
            ->orderBy('email')
            ->get()
            ->values();

        if ($users->count() < 2) {
            return;
        }

        ConversationMessage::query()
            ->whereHas('conversation', fn ($query) => $query->whereIn('buyer_id', $users->pluck('id'))->orWhereIn('seller_id', $users->pluck('id')))
            ->delete();

        Conversation::query()
            ->whereIn('buyer_id', $users->pluck('id'))
            ->orWhereIn('seller_id', $users->pluck('id'))
            ->delete();

        foreach ($users as $index => $buyer) {
            $primarySeller = $users->get(($index + 1) % $users->count());
            $secondarySeller = $users->get(($index + 2) % $users->count());

            if (! $primarySeller instanceof User || ! $secondarySeller instanceof User) {
                continue;
            }

            $primaryListing = Listing::query()
                ->where('user_id', $primarySeller->getKey())
                ->where('status', 'active')
                ->orderBy('id')
                ->first();

            $secondaryListing = Listing::query()
                ->where('user_id', $secondarySeller->getKey())
                ->where('status', 'active')
                ->orderBy('id')
                ->first();

            $this->seedConversationThread(
                $primarySeller,
                $buyer,
                $primaryListing,
                $this->messagePayloads($index, false)
            );

            $this->seedConversationThread(
                $secondarySeller,
                $buyer,
                $secondaryListing,
                $this->messagePayloads($index, true)
            );
        }
    }

    private function conversationTablesExist(): bool
    {
        return Schema::hasTable('conversations') && Schema::hasTable('conversation_messages');
    }

    private function seedConversationThread(
        User $seller,
        User $buyer,
        ?Listing $listing,
        array $messages
    ): void {
        if (! $listing || (int) $seller->getKey() === (int) $buyer->getKey()) {
            return;
        }

        $conversation = Conversation::updateOrCreate(
            [
                'listing_id' => $listing->getKey(),
                'buyer_id' => $buyer->getKey(),
            ],
            [
                'seller_id' => $seller->getKey(),
                'last_message_at' => now(),
            ]
        );

        $lastMessageAt = null;

        foreach ($messages as $payload) {
            $createdAt = now()->subHours((int) $payload['hours_ago']);
            $sender = ($payload['sender'] ?? 'buyer') === 'seller' ? $seller : $buyer;
            $readAfterMinutes = $payload['read_after_minutes'];
            $readAt = is_numeric($readAfterMinutes) ? $createdAt->copy()->addMinutes((int) $readAfterMinutes) : null;

            $message = new ConversationMessage();
            $message->forceFill([
                'conversation_id' => $conversation->getKey(),
                'sender_id' => $sender->getKey(),
                'body' => (string) $payload['body'],
                'read_at' => $readAt,
                'created_at' => $createdAt,
                'updated_at' => $readAt ?? $createdAt,
            ])->save();

            $lastMessageAt = $createdAt;
        }

        if ($lastMessageAt) {
            $conversation->forceFill([
                'seller_id' => $seller->getKey(),
                'last_message_at' => $lastMessageAt,
                'updated_at' => $lastMessageAt,
            ])->saveQuietly();
        }
    }

    private function messagePayloads(int $index, bool $secondary): array
    {
        $openingMessages = [
            'Is this listing still available?',
            'Can you share the best price?',
            'Would pickup this evening work for you?',
            'Can you confirm the condition details?',
            'Do you have any more photos?',
        ];

        $sellerReplies = [
            'Yes, it is available.',
            'I can offer a small discount.',
            'This evening works for me.',
            'Everything is in clean condition.',
            'I can send more photos in a minute.',
        ];

        $closingMessages = [
            'Great, I will message again before I leave.',
            'Perfect. I can arrange pickup.',
            'Thanks. That sounds good to me.',
            'Understood. I am interested.',
            'Nice. I will keep this saved.',
        ];

        $offset = ($index + ($secondary ? 2 : 0)) % count($openingMessages);

        return [
            ['sender' => 'buyer', 'body' => $openingMessages[$offset], 'hours_ago' => 30 - $index, 'read_after_minutes' => 5],
            ['sender' => 'seller', 'body' => $sellerReplies[$offset], 'hours_ago' => 28 - $index, 'read_after_minutes' => 8],
            ['sender' => 'buyer', 'body' => $closingMessages[$offset], 'hours_ago' => 4 + $index, 'read_after_minutes' => $secondary ? 6 : null],
        ];
    }
}