<?php

namespace App\Http\Controllers;

use Inertia\Inertia;
use App\Models\Timesheet;
use Illuminate\Http\Request;
use App\Support\ApiDataTransformer;

class TimesheetController extends Controller
{
    /**
     * Display a listing of the resource.
     */
    public function index()
    {
        $timesheets = Timesheet::with(['entries' => function ($query) {
            $query->selectRaw('
                timesheet_id,
                SUM(hours) as total_hours,
                SUM(CASE WHEN billed = 1 THEN hours ELSE 0 END) as hours_billed,
                MIN(date) as earliest_date,
                MAX(date) as latest_date
            ')
                ->groupBy('timesheet_id');
        }])->get();

        // Sort timesheets by the updated_at timestamp of the latest entry
        $timesheets = $timesheets->sortByDesc(function ($timesheet) {
            $latestEntry = $timesheet->entries()->latest('updated_at')->first();
            return $latestEntry ? $latestEntry->updated_at : $timesheet->updated_at;
        })->values();

        $snakeCaseData = $timesheets->map(function ($timesheet) {
            $entryStats = $timesheet->entries->first();

            return [
                'id' => $timesheet->id,
                'title' => $timesheet->title,
                'total_hours' => $entryStats->total_hours ?? 0,
                'hours_billed' => $entryStats->hours_billed ?? 0,
                'earliest_date' => $entryStats->earliest_date ?? null,
                'latest_date' => $entryStats->latest_date ?? null,
                'created_at' => $timesheet->created_at->toISOString(),
                'updated_at' => $timesheet->updated_at->toISOString(),
            ];
        });

        return ApiDataTransformer::snakeToCamel($snakeCaseData->toArray());
    }

    /**
     * Store a newly created resource in storage.
     */
    public function store(Request $request)
    {
        $validated = $request->validate([
            'title' => 'required|string|max:255',
        ]);

        $snakeCaseData = Timesheet::create($validated);
        return ApiDataTransformer::snakeToCamel($snakeCaseData->toArray());
    }

    /**
     * Display the specified resource.
     */
    public function show(Timesheet $timesheet)
    {
        return Inertia::render('Timesheets', [
            'timesheetData' => $this->index()
        ]);
    }

    /**
     * Update the specified resource in storage.
     */
    public function update(Request $request, Timesheet $timesheet)
    {
        $validatedData = $request->validate([
            'title' => 'required|string|max:255',
        ]);

        // Convert camelCase to snake_case
        $snakeCaseData = ApiDataTransformer::camelToSnake($validatedData);

        $timesheet->update($snakeCaseData);

        return $timesheet;
    }

    /**
     * Remove the specified resource from storage.
     */
    public function destroy(Timesheet $timesheet)
    {
        $timesheet->delete();

        return response()->noContent();
    }
}