<?php

namespace App\Console\Commands;

use Illuminate\Support\Facades\Artisan;
use Illuminate\Console\Command;
use Illuminate\Support\Facades\File;
use Illuminate\Support\Facades\Process;

class NetgesconGitSyncCommand extends Command
{
    protected $signature = 'netgescon:git-sync
        {--remote=origin : Remote Git da usare}
        {--branch=main : Branch da allineare}
        {--force : Continua anche con working tree sporco}
        {--progress-file= : File JSON dove scrivere lo stato avanzamento}';

    protected $description = 'Allinea il nodo corrente da Gitea/Git e rigenera il materiale automatico per Supporto > Modifiche';

    public function handle(): int
    {
        $remote = trim((string) $this->option('remote')) ?: 'origin';
        $branch = trim((string) $this->option('branch')) ?: 'main';
        $force  = (bool) $this->option('force');

        if (! is_dir(base_path('.git'))) {
            $this->error('Repository Git non trovato nella base path corrente.');
            $this->writeProgress(100, 'Repository Git non trovato', 'failed', 1);
            $this->persistSummary([
                'status' => 'failed',
                'exit_code' => 1,
                'message' => 'Repository Git non trovato',
            ]);

            return self::FAILURE;
        }

        $this->writeProgress(5, 'Preparazione sync da Gitea', 'running');

        $currentBranch = $this->runGit(['rev-parse', '--abbrev-ref', 'HEAD']);
        $currentCommit = $this->runGit(['rev-parse', '--short', 'HEAD']);

        if ($currentBranch === null || $currentCommit === null) {
            $this->error('Impossibile leggere lo stato Git locale.');
            $this->writeProgress(100, 'Impossibile leggere stato Git locale', 'failed', 1);
            $this->persistSummary([
                'status' => 'failed',
                'exit_code' => 1,
                'message' => 'Impossibile leggere stato Git locale',
            ]);

            return self::FAILURE;
        }

        $dirtyResult = Process::path(base_path())->run(['git', 'status', '--porcelain']);
        $isDirty     = trim((string) $dirtyResult->output()) !== '';

        if ($isDirty && ! $force) {
            $this->error('Working tree sporco: sync bloccata per evitare conflitti locali.');
            $this->writeProgress(100, 'Working tree sporco: sync bloccata', 'failed', 1);
            $this->persistSummary([
                'status' => 'failed',
                'exit_code' => 1,
                'message' => 'Working tree sporco: sync bloccata',
                'remote' => $remote,
                'branch' => $branch,
                'before_commit' => $currentCommit,
                'working_tree_dirty' => true,
            ]);

            return self::FAILURE;
        }

        $this->info("Fetch da {$remote}...");
        $this->writeProgress(18, 'Fetch remoto da Gitea', 'running');

        $fetch = Process::path(base_path())
            ->timeout(1800)
            ->run(['git', 'fetch', $remote]);

        if (! $fetch->successful()) {
            $this->line(trim((string) ($fetch->errorOutput() !== '' ? $fetch->errorOutput() : $fetch->output())));
            $this->writeProgress(100, 'Fetch remoto fallito', 'failed', 1);
            $this->persistSummary([
                'status' => 'failed',
                'exit_code' => 1,
                'message' => 'Fetch remoto fallito',
                'remote' => $remote,
                'branch' => $branch,
                'before_commit' => $currentCommit,
                'working_tree_dirty' => false,
            ]);

            return self::FAILURE;
        }

        $this->writeProgress(32, 'Allineamento branch locale', 'running');

        if ($currentBranch !== $branch) {
            $checkout = Process::path(base_path())
                ->timeout(1800)
                ->run(['git', 'checkout', $branch]);

            if (! $checkout->successful()) {
                $this->line(trim((string) ($checkout->errorOutput() !== '' ? $checkout->errorOutput() : $checkout->output())));
                $this->writeProgress(100, 'Checkout branch fallito', 'failed', 1);
                $this->persistSummary([
                    'status' => 'failed',
                    'exit_code' => 1,
                    'message' => 'Checkout branch fallito',
                    'remote' => $remote,
                    'branch' => $branch,
                    'before_commit' => $currentCommit,
                    'working_tree_dirty' => false,
                ]);

                return self::FAILURE;
            }
        }

        $this->info("Pull ff-only da {$remote}/{$branch}...");
        $this->writeProgress(48, 'Pull ff-only da Gitea', 'running');

        $pull = Process::path(base_path())
            ->timeout(1800)
            ->run(['git', 'pull', '--ff-only', $remote, $branch]);

        if (! $pull->successful()) {
            $this->line(trim((string) ($pull->errorOutput() !== '' ? $pull->errorOutput() : $pull->output())));
            $this->writeProgress(100, 'Pull da Gitea fallito', 'failed', 1);
            $this->persistSummary([
                'status' => 'failed',
                'exit_code' => 1,
                'message' => 'Pull da Gitea fallito',
                'remote' => $remote,
                'branch' => $branch,
                'before_commit' => $currentCommit,
                'working_tree_dirty' => false,
            ]);

            return self::FAILURE;
        }

        $this->writeProgress(68, 'Rigenerazione changelog Git automatico', 'running');
        File::ensureDirectoryExists(storage_path('app/support/generated'));

        $docsSync = Process::path(base_path())
            ->timeout(1800)
            ->run([
                'bash',
                'scripts/ops/netgescon-sync-git-changelog.sh',
                '--repo',
                base_path(),
                '--output',
                storage_path('app/support/generated/NETGESCON-GIT-AUTOCHANGELOG.md'),
            ]);

        if (! $docsSync->successful()) {
            $this->line(trim((string) ($docsSync->errorOutput() !== '' ? $docsSync->errorOutput() : $docsSync->output())));
            $this->writeProgress(100, 'Rigenerazione changelog Git fallita', 'failed', 1);
            $this->persistSummary([
                'status' => 'failed',
                'exit_code' => 1,
                'message' => 'Rigenerazione changelog Git fallita',
                'remote' => $remote,
                'branch' => $branch,
                'before_commit' => $currentCommit,
                'working_tree_dirty' => false,
            ]);

            return self::FAILURE;
        }

        $this->writeProgress(76, 'Rigenerazione snapshot continuita sviluppo', 'running');
        $snapshotExit = Artisan::call('netgescon:development-snapshot');
        if ($snapshotExit !== 0) {
            $this->writeProgress(100, 'Rigenerazione snapshot sviluppo fallita', 'failed', 1);
            $this->persistSummary([
                'status' => 'failed',
                'exit_code' => 1,
                'message' => 'Rigenerazione snapshot sviluppo fallita',
                'remote' => $remote,
                'branch' => $branch,
                'before_commit' => $currentCommit,
                'working_tree_dirty' => false,
            ]);

            return self::FAILURE;
        }

        $this->writeProgress(82, 'Pulizia cache applicativa', 'running');
        $this->callSilently('optimize:clear');

        $newCommit = $this->runGit(['rev-parse', '--short', 'HEAD']) ?? $currentCommit;
        $remoteRef = $this->runGit(['rev-parse', '--short', 'refs/remotes/' . $remote . '/' . $branch]) ?? $newCommit;

        $this->persistSummary([
            'status' => 'completed',
            'exit_code' => 0,
            'message' => 'Sync Git completata',
            'remote' => $remote,
            'branch' => $branch,
            'before_commit' => $currentCommit,
            'after_commit' => $newCommit,
            'remote_commit' => $remoteRef,
            'working_tree_dirty' => false,
        ]);

        $this->info('Sync Git completata con successo.');
        $this->writeProgress(100, 'Sync Git completata', 'completed', 0);

        return self::SUCCESS;
    }

    private function runGit(array $arguments): ?string
    {
        $result = Process::path(base_path())
            ->timeout(1800)
            ->run(array_merge(['git'], $arguments));

        if (! $result->successful()) {
            return null;
        }

        $output = trim((string) $result->output());

        return $output !== '' ? $output : null;
    }

    private function writeProgress(int $percent, string $message, string $status, ?int $exitCode = null): void
    {
        $path = trim((string) $this->option('progress-file'));
        if ($path === '') {
            return;
        }

        $dir = dirname($path);
        if (! is_dir($dir)) {
            @mkdir($dir, 0775, true);
        }

        @file_put_contents($path, json_encode([
            'timestamp' => now()->toIso8601String(),
            'percent' => max(0, min(100, $percent)),
            'message' => $message,
            'status' => $status,
            'exit_code' => $exitCode,
        ], JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES));
    }

    private function persistSummary(array $payload): void
    {
        File::ensureDirectoryExists(storage_path('app/support/generated'));

        @file_put_contents(
            storage_path('app/support/generated/git-sync-last.json'),
            json_encode(array_merge([
                'synced_at' => now()->toIso8601String(),
            ], $payload), JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES)
        );
    }
}