<?php

namespace App\Livewire\Project\Shared\EnvironmentVariable;

use App\Models\EnvironmentVariable;
use App\Traits\EnvironmentVariableProtection;
use Livewire\Component;

class All extends Component
{
    use EnvironmentVariableProtection;

    public $resource;

    public string $resourceClass;

    public bool $showPreview = false;

    public ?string $variables = null;

    public ?string $variablesPreview = null;

    public string $view = 'normal';

    public bool $is_env_sorting_enabled = false;

    protected $listeners = [
        'saveKey' => 'submit',
        'refreshEnvs',
        'environmentVariableDeleted' => 'refreshEnvs',
    ];

    public function mount()
    {
        $this->is_env_sorting_enabled = data_get($this->resource, 'settings.is_env_sorting_enabled', false);
        $this->resourceClass = get_class($this->resource);
        $resourceWithPreviews = [\App\Models\Application::class];
        $simpleDockerfile = filled(data_get($this->resource, 'dockerfile'));
        if (str($this->resourceClass)->contains($resourceWithPreviews) && ! $simpleDockerfile) {
            $this->showPreview = true;
        }
        $this->sortEnvironmentVariables();
    }

    public function instantSave()
    {
        $this->resource->settings->is_env_sorting_enabled = $this->is_env_sorting_enabled;
        $this->resource->settings->save();
        $this->sortEnvironmentVariables();
        $this->dispatch('success', 'Environment variable settings updated.');
    }

    public function sortEnvironmentVariables()
    {
        if ($this->is_env_sorting_enabled === false) {
            if ($this->resource->environment_variables) {
                $this->resource->environment_variables = $this->resource->environment_variables->sortBy('order')->values();
            }

            if ($this->resource->environment_variables_preview) {
                $this->resource->environment_variables_preview = $this->resource->environment_variables_preview->sortBy('order')->values();
            }
        }

        $this->getDevView();
    }

    public function getDevView()
    {
        $this->variables = $this->formatEnvironmentVariables($this->resource->environment_variables);
        if ($this->showPreview) {
            $this->variablesPreview = $this->formatEnvironmentVariables($this->resource->environment_variables_preview);
        }
    }

    private function formatEnvironmentVariables($variables)
    {
        return $variables->map(function ($item) {
            if ($item->is_shown_once) {
                return "$item->key=(Locked Secret, delete and add again to change)";
            }
            if ($item->is_multiline) {
                return "$item->key=(Multiline environment variable, edit in normal view)";
            }

            return "$item->key=$item->value";
        })->join("\n");
    }

    public function switch()
    {
        $this->view = $this->view === 'normal' ? 'dev' : 'normal';
        $this->sortEnvironmentVariables();
    }

    public function submit($data = null)
    {
        try {
            if ($data === null) {
                $this->handleBulkSubmit();
            } else {
                $this->handleSingleSubmit($data);
            }

            $this->updateOrder();
            $this->sortEnvironmentVariables();
        } catch (\Throwable $e) {
            return handleError($e, $this);
        } finally {
            $this->refreshEnvs();
        }
    }

    private function updateOrder()
    {
        $variables = parseEnvFormatToArray($this->variables);
        $order = 1;
        foreach ($variables as $key => $value) {
            $env = $this->resource->environment_variables()->where('key', $key)->first();
            if ($env) {
                $env->order = $order;
                $env->save();
            }
            $order++;
        }

        if ($this->showPreview) {
            $previewVariables = parseEnvFormatToArray($this->variablesPreview);
            $order = 1;
            foreach ($previewVariables as $key => $value) {
                $env = $this->resource->environment_variables_preview()->where('key', $key)->first();
                if ($env) {
                    $env->order = $order;
                    $env->save();
                }
                $order++;
            }
        }
    }

    private function handleBulkSubmit()
    {
        $variables = parseEnvFormatToArray($this->variables);
        $changesMade = false;
        $errorOccurred = false;

        // Try to delete removed variables
        $deletedCount = $this->deleteRemovedVariables(false, $variables);
        if ($deletedCount > 0) {
            $changesMade = true;
        } elseif ($deletedCount === 0 && $this->resource->environment_variables()->whereNotIn('key', array_keys($variables))->exists()) {
            // If we tried to delete but couldn't (due to Docker Compose), mark as error
            $errorOccurred = true;
        }

        // Update or create variables
        $updatedCount = $this->updateOrCreateVariables(false, $variables);
        if ($updatedCount > 0) {
            $changesMade = true;
        }

        if ($this->showPreview) {
            $previewVariables = parseEnvFormatToArray($this->variablesPreview);

            // Try to delete removed preview variables
            $deletedPreviewCount = $this->deleteRemovedVariables(true, $previewVariables);
            if ($deletedPreviewCount > 0) {
                $changesMade = true;
            } elseif ($deletedPreviewCount === 0 && $this->resource->environment_variables_preview()->whereNotIn('key', array_keys($previewVariables))->exists()) {
                // If we tried to delete but couldn't (due to Docker Compose), mark as error
                $errorOccurred = true;
            }

            // Update or create preview variables
            $updatedPreviewCount = $this->updateOrCreateVariables(true, $previewVariables);
            if ($updatedPreviewCount > 0) {
                $changesMade = true;
            }
        }

        // Debug information
        \Log::info('Environment variables update status', [
            'deletedCount' => $deletedCount,
            'updatedCount' => $updatedCount,
            'deletedPreviewCount' => $deletedPreviewCount ?? 0,
            'updatedPreviewCount' => $updatedPreviewCount ?? 0,
            'changesMade' => $changesMade,
            'errorOccurred' => $errorOccurred,
        ]);

        // Only show success message if changes were actually made and no errors occurred
        if ($changesMade && ! $errorOccurred) {
            $this->dispatch('success', 'Environment variables updated.');
        }
    }

    private function handleSingleSubmit($data)
    {
        $found = $this->resource->environment_variables()->where('key', $data['key'])->first();
        if ($found) {
            $this->dispatch('error', 'Environment variable already exists.');

            return;
        }

        $maxOrder = $this->resource->environment_variables()->max('order') ?? 0;
        $environment = $this->createEnvironmentVariable($data);
        $environment->order = $maxOrder + 1;
        $environment->save();
    }

    private function createEnvironmentVariable($data)
    {
        $environment = new EnvironmentVariable;
        $environment->key = $data['key'];
        $environment->value = $data['value'];
        $environment->is_build_time = $data['is_build_time'] ?? false;
        $environment->is_multiline = $data['is_multiline'] ?? false;
        $environment->is_literal = $data['is_literal'] ?? false;
        $environment->is_preview = $data['is_preview'] ?? false;
        $environment->resourceable_id = $this->resource->id;
        $environment->resourceable_type = $this->resource->getMorphClass();

        return $environment;
    }

    private function deleteRemovedVariables($isPreview, $variables)
    {
        $method = $isPreview ? 'environment_variables_preview' : 'environment_variables';

        // Get all environment variables that will be deleted
        $variablesToDelete = $this->resource->$method()->whereNotIn('key', array_keys($variables))->get();

        // If there are no variables to delete, return 0
        if ($variablesToDelete->isEmpty()) {
            return 0;
        }

        // Check for system variables that shouldn't be deleted
        foreach ($variablesToDelete as $envVar) {
            if ($this->isProtectedEnvironmentVariable($envVar->key)) {
                $this->dispatch('error', "Cannot delete system environment variable '{$envVar->key}'.");

                return 0;
            }
        }

        // Check if any of these variables are used in Docker Compose
        if ($this->resource->type() === 'service' || $this->resource->build_pack === 'dockercompose') {
            foreach ($variablesToDelete as $envVar) {
                [$isUsed, $reason] = $this->isEnvironmentVariableUsedInDockerCompose($envVar->key, $this->resource->docker_compose);

                if ($isUsed) {
                    $this->dispatch('error', "Cannot delete environment variable '{$envVar->key}' <br><br>Please remove it from the Docker Compose file first.");

                    return 0;
                }
            }
        }

        // If we get here, no variables are used in Docker Compose, so we can delete them
        $this->resource->$method()->whereNotIn('key', array_keys($variables))->delete();

        return $variablesToDelete->count();
    }

    private function updateOrCreateVariables($isPreview, $variables)
    {
        $count = 0;
        foreach ($variables as $key => $value) {
            if (str($key)->startsWith('SERVICE_FQDN') || str($key)->startsWith('SERVICE_URL')) {
                continue;
            }
            $method = $isPreview ? 'environment_variables_preview' : 'environment_variables';
            $found = $this->resource->$method()->where('key', $key)->first();

            if ($found) {
                if (! $found->is_shown_once && ! $found->is_multiline) {
                    // Only count as a change if the value actually changed
                    if ($found->value !== $value) {
                        $found->value = $value;
                        $found->save();
                        $count++;
                    }
                }
            } else {
                $environment = new EnvironmentVariable;
                $environment->key = $key;
                $environment->value = $value;
                $environment->is_build_time = false;
                $environment->is_multiline = false;
                $environment->is_preview = $isPreview;
                $environment->resourceable_id = $this->resource->id;
                $environment->resourceable_type = $this->resource->getMorphClass();

                $environment->save();
                $count++;
            }
        }

        return $count;
    }

    public function refreshEnvs()
    {
        $this->resource->refresh();
        $this->sortEnvironmentVariables();
        $this->getDevView();
    }
}