<?php

namespace App\Services;

class SocialMediaStudioService
{
    public function __construct(
        private HuggingFaceImageService $huggingFaceImage,
        private HuggingFaceVideoService $huggingFaceVideo,
        private FreepikVideoService $freepikVideo,
        private FreepikAssetRemixService $freepikAssetRemix,
        private OpenAiVideoService $openAiVideo,
        private ReplicateImageService $replicateImage,
        private PollinationsImageService $pollinations,
        private PosterImageService $posterImage,
        private StoryImageNormalizerService $storyNormalizer,
        private MotionVideoService $motionVideo,
        private GeminiVideoService $geminiVideo,
        private ReplicateVideoService $replicateVideo,
    ) {
    }

    public function generateImage(string $prompt): array
    {
        $cleanPrompt = trim($prompt);

        return $this->generateImageFallback($cleanPrompt, []);
    }

    private function generateImageFallback(string $prompt, array $fallbackErrors): array
    {
        try {
            $urls = $this->huggingFaceImage->generate($prompt, 'portrait', 4);
            $variants = $this->storyNormalizer->normalizeMany($urls);

            return [
                'url' => $variants[0]['url'] ?? null,
                'thumbnail_url' => $variants[0]['thumbnail_url'] ?? null,
                'variants' => $variants,
                'provider' => 'huggingface',
                'aspect' => '9:16',
                'prompt' => $prompt,
                'width' => 1080,
                'height' => 1920,
                'notice' => 'Image story-size diproses lewat Hugging Face.',
            ];
        } catch (\Throwable $hfError) {
            try {
                $urls = $this->pollinations->generate($prompt, 'portrait', 4);
                $variants = $this->storyNormalizer->normalizeMany($urls);

                return [
                    'url' => $variants[0]['url'] ?? null,
                    'thumbnail_url' => $variants[0]['thumbnail_url'] ?? null,
                    'variants' => $variants,
                    'provider' => 'pollinations',
                    'aspect' => '9:16',
                    'prompt' => $prompt,
                    'width' => 1080,
                    'height' => 1920,
                    'notice' => 'Image story-size diproses lewat Pollinations.',
                ];
            } catch (\Throwable $pollinationsError) {
                $urls = $this->posterImage->generate($prompt, 'portrait', 4);
                $variants = $this->storyNormalizer->normalizeMany($urls);

                return [
                    'url' => $variants[0]['url'] ?? null,
                    'thumbnail_url' => $variants[0]['thumbnail_url'] ?? null,
                    'variants' => $variants,
                    'provider' => 'poster',
                    'aspect' => '9:16',
                    'prompt' => $prompt,
                    'width' => 1080,
                    'height' => 1920,
                    'notice' => 'Provider eksternal tidak tersedia, menggunakan poster story-size lokal.',
                    'fallback_errors' => array_merge($fallbackErrors, [
                        'huggingface' => $hfError->getMessage(),
                        'pollinations' => $pollinationsError->getMessage(),
                    ]),
                ];
            }
        }
    }

    public function generateVideo(string $prompt, array $options = []): array
    {
        $cleanPrompt = trim($prompt);

        return $this->generateVideoFallback($cleanPrompt, [], $options);
    }

    private function generateVideoFallback(string $prompt, array $fallbackErrors, array $options = []): array
    {
        try {
            $requestedProvider = $this->resolveRequestedVideoProvider($options);

            if ($requestedProvider === 'gemini') {
                if (! $this->geminiVideo->isAvailable()) {
                    throw new \RuntimeException('Provider Gemini belum siap karena GEMINI_API_KEY belum diset.');
                }

                $submission = $this->geminiVideo->submit(null, $prompt, $options);
                $appliedSettings = (array) ($submission['applied_settings'] ?? []);

                return [
                    'provider' => 'gemini-veo',
                    'prediction_id' => $submission['prediction_id'] ?? null,
                    'prompt' => $prompt,
                    'applied_settings' => $appliedSettings,
                    'notice' => 'Render Google Veo native aktif dengan '.$this->describeAppliedVideoSettings($appliedSettings).'.',
                    'async' => true,
                ];
            }

            if ($requestedProvider === 'huggingface') {
                return $this->huggingFaceVideo->generate(null, $prompt, $options);
            }

            if ($requestedProvider === 'runway') {
                try {
                    $duration = (int) preg_replace('/[^0-9]/', '', (string) ($options['video_duration'] ?? '4s'));
                    $video = $this->freepikVideo->generate($prompt, $duration);

                    return [
                        ...$video,
                        'prompt' => $prompt,
                        'notice' => 'Render Runway aktif lewat Freepik dengan output vertikal siap pakai.',
                        'async' => false,
                    ];
                } catch (\Throwable $runwayError) {
                    $fallbackErrors['runway'] = $runwayError->getMessage();

                    if ($this->replicateVideo->isAvailable()) {
                        $image = $this->generateSingleStoryImage($prompt);
                        $fallbackOptions = array_merge($options, ['video_provider' => 'replicate']);
                        $video = $this->generateVideoFromImageUrl((string) $image['url'], $prompt, $fallbackOptions);

                        return [
                            ...$video,
                            'source_image_provider' => $image['provider'] ?? 'huggingface',
                            'notice' => 'Runway tidak tersedia saat ini, otomatis dialihkan ke Replicate dari source frame story terbaru.',
                            'fallback_errors' => array_merge($fallbackErrors, (array) ($image['fallback_errors'] ?? [])),
                        ];
                    }
                }
            }

            if ($requestedProvider === 'openai') {
                return $this->openAiVideo->generate(null, $prompt, $options);
            }

            if ($requestedProvider === 'replicate') {
                if (! $this->replicateVideo->isAvailable()) {
                    throw new \RuntimeException('Provider Replicate belum siap karena REPLICATE_API_KEY belum diset.');
                }

                $image = $this->generateSingleStoryImage($prompt);
                $video = $this->generateVideoFromImageUrl((string) $image['url'], $prompt, $options);

                return [
                    ...$video,
                    'source_image_provider' => $image['provider'] ?? 'huggingface',
                    'notice' => 'Video diproses lewat Replicate dari source frame story terbaru.',
                    'fallback_errors' => array_merge($fallbackErrors, (array) ($image['fallback_errors'] ?? [])),
                ];
            }

            // Buat frame visual dulu
            $image = $this->generateSingleStoryImage($prompt);

            if ($this->replicateVideo->isAvailable()) {
                $video = $this->generateVideoFromImageUrl((string) $image['url'], $prompt, $options);

                return [
                    ...$video,
                    'source_image_provider' => $image['provider'] ?? 'huggingface',
                    'notice' => 'Video diproses lewat Replicate dari source frame story terbaru.',
                    'fallback_errors' => array_merge($fallbackErrors, (array) ($image['fallback_errors'] ?? [])),
                ];
            }

            // Render jadi motion video lokal via ffmpeg
            $video = $this->motionVideo->createFromImageUrl((string) $image['url'], $prompt, $options);

            return [
                'url' => $video['url'],
                'provider' => $video['provider'],
                'aspect' => '9:16',
                'prompt' => $prompt,
                'duration_seconds' => $video['duration_seconds'] ?? 6,
                'source_image_url' => $image['url'],
                'source_image_provider' => $image['provider'],
                'notice' => 'Video vertikal dirender lokal dari visual story terbaru.',
                'fallback_errors' => array_merge($fallbackErrors, (array) ($image['fallback_errors'] ?? [])),
            ];
        } catch (\Throwable $fallbackVideoError) {
            throw new \RuntimeException(
                'Gagal membuat video: ' . $fallbackVideoError->getMessage()
            );
        }
    }

    public function generateVideoFromImageUrl(string $imageUrl, string $prompt, array $options = []): array
    {
        $requestedProvider = $this->resolveRequestedVideoProvider($options);

        if ($requestedProvider === 'gemini') {
            if (! $this->geminiVideo->isAvailable()) {
                throw new \RuntimeException('Provider Gemini belum siap karena GEMINI_API_KEY belum diset.');
            }

            $submission = $this->geminiVideo->submit($imageUrl, trim($prompt), $options);
            $appliedSettings = (array) ($submission['applied_settings'] ?? []);

            return [
                'provider' => 'gemini-veo',
                'prediction_id' => $submission['prediction_id'] ?? null,
                'source_image_url' => $imageUrl,
                'prompt' => trim($prompt),
                'requested_quality' => $options['video_quality'] ?? '720p',
                'requested_duration' => $options['video_duration'] ?? '4s',
                'applied_settings' => $appliedSettings,
                'notice' => 'Render Google Veo native aktif dengan '.$this->describeAppliedVideoSettings($appliedSettings).'.',
                'async' => true,
            ];
        }

        if ($requestedProvider === 'huggingface') {
            return $this->huggingFaceVideo->generate($imageUrl, trim($prompt), $options);
        }

        if ($requestedProvider === 'runway') {
            try {
                $duration = (int) preg_replace('/[^0-9]/', '', (string) ($options['video_duration'] ?? '4s'));
                $result = $this->freepikAssetRemix->submitRemixVideo([
                    'type' => 'image',
                    'url' => $imageUrl,
                    'thumbnail_url' => $imageUrl,
                ], trim($prompt), 'image_to_video', $duration);

                return [
                    ...$result,
                    'source_image_url' => $imageUrl,
                    'prompt' => trim($prompt),
                    'notice' => 'Render Runway aktif dari start frame yang dipilih. Job diproses async lalu hasil final akan masuk ke gallery.',
                    'async' => true,
                ];
            } catch (\Throwable $runwayError) {
                if ($this->replicateVideo->isAvailable()) {
                    $fallbackOptions = array_merge($options, ['video_provider' => 'replicate']);
                    $fallbackVideo = $this->generateVideoFromImageUrl($imageUrl, trim($prompt), $fallbackOptions);

                    return [
                        ...$fallbackVideo,
                        'notice' => 'Runway tidak tersedia saat ini, otomatis dialihkan ke Replicate dari start frame yang dipilih.',
                    ];
                }
            }
        }

        if ($requestedProvider === 'openai') {
            return $this->openAiVideo->generate($imageUrl, trim($prompt), $options);
        }

        if ($requestedProvider === 'replicate' && ! $this->replicateVideo->isAvailable()) {
            throw new \RuntimeException('Provider Replicate belum siap karena REPLICATE_API_KEY belum diset.');
        }

        // If Replicate is available, submit async and return prediction_id immediately.
        // The controller redirects right away; browser polls /tools/video/poll for result.
        if ($this->replicateVideo->isAvailable()) {
            $submission = $this->replicateVideo->submit($imageUrl, trim($prompt), $options);
            $appliedSettings = (array) ($submission['applied_settings'] ?? []);
            $appliedModel = (string) ($appliedSettings['replicate_i2v_model'] ?? 'replicate-i2v');
            $appliedQuality = (string) ($appliedSettings['video_quality'] ?? ($options['video_quality'] ?? '720p'));
            $appliedDuration = (string) ($appliedSettings['video_duration'] ?? ($options['video_duration'] ?? '4s'));
            $appliedAudio = (string) ($appliedSettings['video_audio'] ?? ($options['video_audio'] ?? 'off'));
            return [
                'provider'         => 'replicate-i2v',
                'prediction_id'    => $submission['prediction_id'] ?? null,
                'source_image_url' => $imageUrl,
                'prompt'           => trim($prompt),
                'requested_quality' => $options['video_quality'] ?? '720p',
                'requested_duration' => $options['video_duration'] ?? '4s',
                'applied_settings' => $appliedSettings,
                'notice'           => 'Render Replicate aktif memakai '.$appliedModel.' dengan output '.$appliedQuality.', durasi '.$appliedDuration.', dan audio '.($appliedAudio === 'on' ? 'aktif' : 'nonaktif').'.',
                'async'            => true,
            ];
        }

        // Fallback: local FFmpeg Ken Burns zoompan (sync, fast enough on small res)
        $video = $this->motionVideo->createFromImageUrl($imageUrl, trim($prompt), $options);

        return [
            'url'                   => $video['url'],
            'provider'              => $video['provider'],
            'aspect'                => '9:16',
            'prompt'                => trim($prompt),
            'duration_seconds'      => $video['duration_seconds'] ?? 5,
            'source_image_url'      => $imageUrl,
            'source_image_provider' => 'upload',
            'notice'                => 'Video dirender dari gambar (FFmpeg zoompan).',
            'async'                 => false,
        ];
    }

    private function shouldUseGeminiVeo(array $options): bool
    {
        return $this->resolveRequestedVideoProvider($options) === 'gemini'
            && (string) ($options['video_model'] ?? '') === 'veo';
    }

    private function resolveRequestedVideoProvider(array $options): string
    {
        $provider = trim((string) ($options['video_provider'] ?? 'replicate'));

        return match ($provider) {
            'runway', 'huggingface', 'openai', 'replicate' => $provider,
            default => 'gemini',
        };
    }

    private function describeAppliedVideoSettings(array $appliedSettings): string
    {
        $model = (string) ($appliedSettings['gemini_model'] ?? 'veo-3.1-fast-generate-preview');
        $quality = (string) ($appliedSettings['video_quality'] ?? '720p');
        $duration = (string) ($appliedSettings['video_duration'] ?? '4s');
        $audio = (string) ($appliedSettings['video_audio'] ?? 'on');

        return $model.' dengan output '.$quality.', durasi '.$duration.', dan audio '.($audio === 'on' ? 'aktif' : 'nonaktif');
    }

    public function remixFromAsset(array $source, string $prompt, string $mode, string $outputType): array
    {
        $cleanPrompt = trim($prompt);

        if ($cleanPrompt === '') {
            throw new \RuntimeException('Prompt remix tidak boleh kosong.');
        }

        $mode = trim($mode);
        $outputType = trim($outputType);
        $remixPrompt = $this->composeRemixPrompt($source, $cleanPrompt, $mode, $outputType);

        if ($outputType === 'video') {
            $sourceImageUrl = $this->resolveReferenceImageUrl($source);
            $video = $this->generateVideoFromImageUrl($sourceImageUrl, $remixPrompt);

            return [
                ...$video,
                'prompt' => $cleanPrompt,
                'source_image_url' => $sourceImageUrl,
                'notice' => 'AI Remix video diproses lewat jalur Hugging Face-compatible image-to-video.',
            ];
        }

        $image = $this->generateRemixImageFallback($remixPrompt, $mode);

        return [
            ...$image,
            'prompt' => $cleanPrompt,
            'notice' => $image['notice'] ?? 'AI Remix image diproses lewat Replicate/Hugging Face fallback. Hasil mengikuti prompt dan referensi secara aproksimatif.',
        ];
    }

    private function generateSingleStoryImage(string $prompt): array
    {
        $cleanPrompt = trim($prompt);

        try {
            $urls = $this->huggingFaceImage->generate($cleanPrompt, 'portrait', 1);
            $variant = $this->storyNormalizer->normalizeMany($urls)[0];

            return [
                ...$variant,
                'provider' => 'huggingface',
                'notice' => 'Source frame diproses lewat Hugging Face.',
            ];
        } catch (\Throwable $hfError) {
            try {
                $urls = $this->pollinations->generate($cleanPrompt, 'portrait', 1);
                $variant = $this->storyNormalizer->normalizeMany($urls)[0];

                return [
                    ...$variant,
                    'provider' => 'pollinations',
                    'notice' => 'Source frame diproses lewat Pollinations.',
                ];
            } catch (\Throwable $fallbackError) {
                $urls = $this->posterImage->generate($cleanPrompt, 'portrait', 1);
                $variant = $this->storyNormalizer->normalizeMany($urls)[0];

                return [
                    ...$variant,
                    'provider' => 'poster',
                    'notice' => 'Menggunakan poster story-size lokal.',
                ];
            }
        }
    }

    private function composeRemixPrompt(array $source, string $prompt, string $mode, string $outputType): string
    {
        $sourcePrompt = trim((string) ($source['prompt'] ?? ''));
        $modeInstruction = match ($mode) {
            'mockup' => 'Transform the reference into a polished premium mockup while preserving the main subject and overall composition cues.',
            'face_swap', 'strict_face_swap' => 'Preserve the primary identity, facial structure, and key likeness cues from the reference as much as possible while following the new styling request.',
            'restyle' => 'Restyle the reference into a fresh variation while keeping the same subject, framing intent, and recognizable visual anchors.',
            default => 'Create a refined variation based on the reference asset while preserving the main subject and core composition cues.',
        };

        $typeInstruction = ($source['type'] ?? 'image') === 'video'
            ? 'The reference comes from a video thumbnail, so preserve the hero subject and cinematic framing from that source frame.'
            : 'The reference comes from a still image, so preserve the hero subject and key visual balance from that image.';

        $outputInstruction = $outputType === 'video'
            ? 'Write the prompt as a motion-ready direction with clear cinematic movement and continuity from the reference.'
            : 'Write the prompt as an image-generation direction for a single strong keyframe.';

        $sourceInstruction = $sourcePrompt !== ''
            ? 'Reference description: '.$sourcePrompt.'.'
            : 'Reference description: preserve the selected source image subject, identity cues, and overall framing.';

        return trim($modeInstruction.' '.$typeInstruction.' '.$sourceInstruction.' '.$outputInstruction.' User request: '.$prompt);
    }

    private function resolveReferenceImageUrl(array $source): string
    {
        $sourceType = (string) ($source['type'] ?? 'image');

        if ($sourceType === 'video') {
            $thumbnailUrl = trim((string) ($source['thumbnail_url'] ?? ''));

            if ($thumbnailUrl === '') {
                throw new \RuntimeException('Source video belum punya thumbnail/reference image untuk diproses jadi video baru.');
            }

            return $thumbnailUrl;
        }

        $imageUrl = trim((string) ($source['url'] ?? ''));

        if ($imageUrl === '') {
            throw new \RuntimeException('Source image tidak punya URL referensi yang bisa dipakai untuk AI Remix.');
        }

        return $imageUrl;
    }

    private function generateRemixImageFallback(string $prompt, string $mode): array
    {
        $fallbackErrors = [];

        if ($this->replicateImage->isAvailable()) {
            try {
                $provider = $this->replicateProviderForRemixMode($mode);
                $urls = $this->replicateImage->generate($prompt, 'portrait', 1, $provider);
                $variants = $this->storyNormalizer->normalizeMany($urls);

                return [
                    'url' => $variants[0]['url'] ?? null,
                    'thumbnail_url' => $variants[0]['thumbnail_url'] ?? null,
                    'variants' => $variants,
                    'provider' => $provider,
                    'aspect' => '9:16',
                    'prompt' => $prompt,
                    'width' => 1080,
                    'height' => 1920,
                    'notice' => 'AI Remix image diproses lewat Replicate.',
                ];
            } catch (\Throwable $replicateError) {
                $fallbackErrors['replicate'] = $replicateError->getMessage();
            }
        }

        return $this->generateImageFallback($prompt, $fallbackErrors);
    }

    private function replicateProviderForRemixMode(string $mode): string
    {
        return match ($mode) {
            'mockup' => 'replicate-ideogram',
            'restyle', 'face_swap', 'strict_face_swap' => 'replicate-flux',
            default => 'replicate-imagen4',
        };
    }

}