<?php

namespace App\Http\Controllers;

use App\Models\PipelineItem;
use App\Support\ApiDataTransformer;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;

class PipelineItemController extends Controller
{
    /**
     * Display a listing of the resource.
     */
    public function index()
    {
        $pipelineItems = PipelineItem
            ::withCount(['notes' => function ($query) {
                $query->where('notable_type', 'App\Models\PipelineItem');
            }])
            ->withCount(['todos' => function ($query) {
                $query->where('todoable_type', 'App\Models\PipelineItem');
            }])
            ->orderBy('position')
            ->get();

        $pipelineItemsArray = $pipelineItems->map(function ($item) {
            $itemArray = $item->toArray();
            $itemArray['next_todo_due_date'] = $item->todos->first()?->due_date?->toISOString() ?? null;
            unset($itemArray['todos']); // Remove the todos array
            return $itemArray;
        });

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

    /**
     * Display a listing of the resource.
     */
    public function single(int $id)
    {
        $pipelineItem = PipelineItem
            ::with(['notes' => function ($query) {
                $query->where('notable_type', 'App\Models\PipelineItem')->orderBy('created_at', 'desc');
            }])->with(['todos' => function ($query) {
                $query->where('todoable_type', 'App\Models\PipelineItem')->orderBy('due_date', 'asc');
            }])->orderBy('position')->findOrFail($id);

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

    /**
     * Store a newly created resource in storage.
     */
    public function store(Request $request)
    {
        $validatedData = $request->validate([
            'pipelineLaneId' => 'required|integer|exists:pipeline_lanes,id',
            'title' => 'required|string',
            'position' => 'required|integer|min:0',
            'expectedRevenue' => 'nullable|numeric',
            'dueDate' => 'nullable|date',
            'description' => 'nullable|string',
        ]);

        $pipelineItem = PipelineItem::create($validatedData);

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

    /**
     * Update the specified resource in storage.
     */
    public function update(Request $request, int $id)
    {
        $validatedData = $request->validate([
            'pipelineLaneId' => 'sometimes|integer|exists:pipeline_lanes,id',
            'title' => 'sometimes|string',
            'position' => 'sometimes|integer|min:0',
            'expectedRevenue' => 'nullable|numeric',
            'dueDate' => 'nullable|date',
            'description' => 'nullable|string',
        ]);

        $snakeCaseData = ApiDataTransformer::camelToSnake($validatedData);

        DB::beginTransaction();

        try {
            $pipelineItem = PipelineItem::findOrFail($id);
            $snakeCaseData = ApiDataTransformer::camelToSnake($validatedData);
            $pipelineItem->update($snakeCaseData);
            DB::commit();
            return response()->noContent();
        } catch (\Exception $e) {
            DB::rollBack();
            return response()->json(['error' => 'Failed to update pipeline item', 'message' => $e->getMessage()], 500);
        }
    }

    /**
     * Remove the specified resource from storage.
     */
    public function delete(int $id)
    {
        PipelineItem::findOrFail($id)->delete();
        return response()->noContent();
    }
}