<?php

namespace App\Console\Commands;

use Illuminate\Console\Command;
use Illuminate\Support\Facades\DB;
use App\Models\User;
use App\Models\Employee;

class SyncLegacyDepartments extends Command
{
    protected $signature = 'import:legacy-departments';
    protected $description = 'Sync legacy departments and designations to the local database, and map employees';

    public function handle()
    {
        $this->info("Importing Legacy Departments...");

        // 1. Fetch Legacy Departments
        $legacyDepts = DB::connection('legacy')->table('departments')->get();
        foreach ($legacyDepts as $dept) {
            DB::table('departments')->updateOrInsert(
                ['id' => $dept->id], // Preserving ID mapping is critical for designations and employee foreign keys
                [
                    'name' => $dept->name,
                    'branch_id' => 1, // Defaulting to Main Branch
                    'description' => 'Imported from legacy',
                    'status' => 'active',
                    'created_by' => 1,
                    'created_at' => now(),
                    'updated_at' => now(),
                ]
            );
        }
        $this->info("Synced " . count($legacyDepts) . " departments.");

        // 2. Fetch Legacy Designations
        $this->info("Importing Legacy Designations...");
        $legacyDesigs = DB::connection('legacy')->table('designations')->get();
        foreach ($legacyDesigs as $desig) {
            DB::table('designations')->updateOrInsert(
                ['id' => $desig->id], // Preserving ID for employee foreign mapping
                [
                    'name' => $desig->name,
                    'department_id' => $desig->department_id,
                    'description' => 'Imported from legacy',
                    'status' => 'active',
                    'created_by' => 1,
                    'created_at' => now(),
                    'updated_at' => now(),
                ]
            );
        }
        $this->info("Synced " . count($legacyDesigs) . " designations.");

        // 3. Update Employees
        $this->info("Remapping Employee Profiles...");
        // Legacy system stored the roles directly on the users table
        $legacyUsers = DB::connection('legacy')->table('users')->get();
        
        $mappedCount = 0;
        foreach ($legacyUsers as $legacyUser) {
            if (!$legacyUser || !isset($legacyUser->email)) continue;

            $localUser = User::where('email', $legacyUser->email)->first();
            if (!$localUser) continue;

            // Map the imported departments/designations to the mapped Employee
            $payload = [
                'department_id' => $legacyUser->team_id ?? $legacyUser->department_id ?? null,
                'designation_id' => $legacyUser->designation_id ?? null,
                'date_of_birth' => $legacyUser->dob ? \Carbon\Carbon::parse($legacyUser->dob)->toDateString() : null,
                'gender' => $legacyUser->gender ?? null,
                'branch_id' => 1 // Legacy default
            ];

            // If the legacy profile had an authentic string ID like SEB2018-2008T, override the generic EMP-XXXXX ID
            if (!empty($legacyUser->code)) {
                $payload['employee_id'] = $legacyUser->code;
            }

            Employee::where('user_id', $localUser->id)->update($payload);
            $mappedCount++;
        }
        $this->info("Successfully mapped $mappedCount employee profiles to their native roles!");
    }
}