<?php

namespace App\Console\Commands;

use App\Models\SpatialPlanning;
use Illuminate\Console\Command;
use Maatwebsite\Excel\Facades\Excel;
use Illuminate\Support\Facades\DB;
use Exception;

class InitSpatialPlanningDatas extends Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'spatial:init {file? : Path to the CSV/Excel file} {--truncate : Clear existing data before import} {--safe-truncate : Clear only spatial plannings without retribution proposals} {--force-truncate : Force truncate by disabling foreign key checks}';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Import spatial planning data from CSV/Excel file for retribution';

    /**
     * Execute the console command.
     */
    public function handle()
    {
        $filePath = $this->argument('file') ?? 'public/templates/Data_2025___Estimasi_Jumlah_Lantai.csv';
        $fullPath = storage_path('app/' . $filePath);

        // Check if file exists
        if (!file_exists($fullPath)) {
            $this->error("File not found: {$fullPath}");
            $this->info("Available files in templates:");
            $this->listAvailableFiles();
            return 1;
        }

        // Handle truncate options
        if (($this->option('truncate') && $this->option('safe-truncate')) ||
            ($this->option('truncate') && $this->option('force-truncate')) ||
            ($this->option('safe-truncate') && $this->option('force-truncate'))) {
            $this->error('Cannot use multiple truncate options together. Choose only one.');
            return 1;
        }

        // Confirm truncate if requested
        if ($this->option('truncate')) {
            if ($this->confirm('This will delete all existing spatial planning data and related retribution proposals. Continue?')) {
                $this->info('Truncating tables...');
                
                try {
                    // First delete retribution proposals that reference spatial plannings
                    $deletedProposals = DB::table('retribution_proposals')
                        ->whereNotNull('spatial_planning_id')
                        ->count();
                    
                    if ($deletedProposals > 0) {
                        DB::table('retribution_proposals')
                            ->whereNotNull('spatial_planning_id')
                            ->delete();
                        $this->info("Deleted {$deletedProposals} retribution proposals linked to spatial plannings.");
                    }
                    
                    // Method 1: Try truncate with disabled foreign key checks
                    try {
                        DB::statement('SET FOREIGN_KEY_CHECKS = 0');
                        DB::table('spatial_plannings')->truncate();
                        DB::statement('SET FOREIGN_KEY_CHECKS = 1');
                        $this->info('Spatial plannings table truncated successfully.');
                    } catch (\Exception $truncateError) {
                        // Method 2: Fallback to delete if truncate fails
                        $this->warn('Truncate failed, using delete method...');
                        $deletedSpatial = DB::table('spatial_plannings')->delete();
                        $this->info("Deleted {$deletedSpatial} spatial planning records.");
                        
                        // Reset auto increment
                        DB::statement('ALTER TABLE spatial_plannings AUTO_INCREMENT = 1');
                    }
                    
                } catch (\Exception $e) {
                    $this->error('Failed to truncate tables: ' . $e->getMessage());
                    return 1;
                }
            } else {
                $this->info('Operation cancelled.');
                return 0;
            }
        }

        // Force truncate - disable foreign key checks and truncate everything
        if ($this->option('force-truncate')) {
            if ($this->confirm('This will FORCE truncate ALL spatial planning data by disabling foreign key checks. This is risky! Continue?')) {
                $this->info('Force truncating with disabled foreign key checks...');
                
                try {
                    DB::beginTransaction();
                    
                    // Disable foreign key checks
                    DB::statement('SET FOREIGN_KEY_CHECKS = 0');
                    
                    // Truncate both tables
                    DB::table('retribution_proposals')->truncate();
                    DB::table('spatial_plannings')->truncate();
                    
                    // Re-enable foreign key checks
                    DB::statement('SET FOREIGN_KEY_CHECKS = 1');
                    
                    $this->info('Force truncate completed successfully.');
                    
                    DB::commit();
                    
                } catch (\Exception $e) {
                    DB::rollBack();
                    // Make sure to re-enable foreign key checks even on error
                    try {
                        DB::statement('SET FOREIGN_KEY_CHECKS = 1');
                    } catch (\Exception $fkError) {
                        $this->error('Failed to re-enable foreign key checks: ' . $fkError->getMessage());
                    }
                    $this->error('Failed to force truncate: ' . $e->getMessage());
                    return 1;
                }
            } else {
                $this->info('Operation cancelled.');
                return 0;
            }
        }

        // Safe truncate - only delete spatial plannings without retribution proposals
        if ($this->option('safe-truncate')) {
            if ($this->confirm('This will delete only spatial planning data that have no retribution proposals. Continue?')) {
                $this->info('Safe truncating spatial plannings...');
                
                try {
                    DB::beginTransaction();
                    
                    // Count spatial plannings with retribution proposals
                    $withProposals = DB::table('spatial_plannings')
                        ->whereExists(function ($query) {
                            $query->select(DB::raw(1))
                                ->from('retribution_proposals')
                                ->whereColumn('retribution_proposals.spatial_planning_id', 'spatial_plannings.id');
                        })
                        ->count();
                    
                    // Delete spatial plannings without retribution proposals
                    $deletedCount = DB::table('spatial_plannings')
                        ->whereNotExists(function ($query) {
                            $query->select(DB::raw(1))
                                ->from('retribution_proposals')
                                ->whereColumn('retribution_proposals.spatial_planning_id', 'spatial_plannings.id');
                        })
                        ->delete();
                    
                    $this->info("Deleted {$deletedCount} spatial plannings without retribution proposals.");
                    $this->info("Kept {$withProposals} spatial plannings that have retribution proposals.");
                    
                    DB::commit();
                    
                } catch (\Exception $e) {
                    DB::rollBack();
                    $this->error('Failed to safe truncate: ' . $e->getMessage());
                    return 1;
                }
            } else {
                $this->info('Operation cancelled.');
                return 0;
            }
        }

        $this->info("Starting import from: {$filePath}");
        $this->info("Full path: {$fullPath}");

        try {
            DB::beginTransaction();

            $data = Excel::toArray([], $fullPath);
            
            if (empty($data) || empty($data[0])) {
                $this->error('No data found in the file.');
                return 1;
            }

            $rows = $data[0]; // Get first sheet
            $headers = array_shift($rows); // Remove header row
            
            $this->info("Found " . count($rows) . " data rows to import.");
            $this->info("Headers: " . implode(', ', $headers));

            $progressBar = $this->output->createProgressBar(count($rows));
            $progressBar->start();

            $imported = 0;
            $skipped = 0;

            foreach ($rows as $index => $row) {
                try {
                    // Skip empty rows
                    if (empty(array_filter($row))) {
                        $skipped++;
                        $progressBar->advance();
                        continue;
                    }

                    // Map CSV columns to model attributes
                    $spatialData = [
                        'name' => $this->cleanString($row[1] ?? ''), // pemohon
                        'location' => $this->cleanString($row[2] ?? ''), // alamat
                        'activities' => $this->cleanString($row[3] ?? ''), // activities
                        'land_area' => $this->cleanNumber($row[4] ?? 0), // luas_lahan
                        'site_bcr' => $this->cleanNumber($row[5] ?? 0), // bcr_kawasan
                        'area' => $this->cleanNumber($row[6] ?? 0), // area
                        'no_tapak' => $this->cleanString($row[7] ?? ''), // no_tapak
                        'no_skkl' => $this->cleanString($row[8] ?? ''), // no_skkl
                        'no_ukl' => $this->cleanString($row[9] ?? ''), // no_ukl
                        'building_function' => $this->cleanString($row[10] ?? ''), // fungsi_bangunan
                        'sub_building_function' => $this->cleanString($row[11] ?? ''), // sub_fungsi_bangunan
                        'number_of_floors' => $this->cleanNumber($row[12] ?? 1), // jumlah_lantai
                        'number' => $this->cleanString($row[0] ?? ''), // no
                        'date' => now(), // Set current date
                        'kbli' => null, // Not in CSV, set as null
                    ];

                    // Validate required fields
                    if (empty($spatialData['name']) && empty($spatialData['activities'])) {
                        $skipped++;
                        $progressBar->advance();
                        continue;
                    }

                    SpatialPlanning::create($spatialData);
                    $imported++;

                } catch (Exception $e) {
                    $this->newLine();
                    $this->error("Error importing row " . ($index + 2) . ": " . $e->getMessage());
                    $skipped++;
                }

                $progressBar->advance();
            }

            $progressBar->finish();
            $this->newLine(2);

            DB::commit();

            $this->info("Import completed successfully!");
            $this->info("Imported: {$imported} records");
            $this->info("Skipped: {$skipped} records");

            return 0;

        } catch (Exception $e) {
            DB::rollBack();
            $this->error("Import failed: " . $e->getMessage());
            return 1;
        }
    }

    /**
     * Clean string data
     */
    private function cleanString($value)
    {
        if (is_null($value)) return null;
        return trim(str_replace(["\n", "\r", "\t"], ' ', $value));
    }

    /**
     * Clean numeric data
     */
    private function cleanNumber($value)
    {
        if (is_null($value) || $value === '') return 0;
        
        // Remove non-numeric characters except decimal point
        $cleaned = preg_replace('/[^0-9.]/', '', $value);
        
        return is_numeric($cleaned) ? (float) $cleaned : 0;
    }

    /**
     * List available template files
     */
    private function listAvailableFiles()
    {
        $templatesPath = storage_path('app/public/templates');
        if (is_dir($templatesPath)) {
            $this->info("Files in storage/app/public/templates:");
            $extensions = ['csv', 'xlsx', 'xls'];
            foreach ($extensions as $ext) {
                $files = glob($templatesPath . '/*.' . $ext);
                foreach ($files as $file) {
                    $this->line('  - ' . basename($file));
                }
            }
        }

        $publicTemplatesPath = public_path('templates');
        if (is_dir($publicTemplatesPath)) {
            $this->info("Files in public/templates:");
            $extensions = ['csv', 'xlsx', 'xls'];
            foreach ($extensions as $ext) {
                $files = glob($publicTemplatesPath . '/*.' . $ext);
                foreach ($files as $file) {
                    $this->line('  - ' . basename($file));
                }
            }
        }
    }
}