<?php

namespace App\Http\Controllers;

use App\Models\Action;
use App\Models\Decision;
use App\Models\Segment;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Inertia\Inertia;

class WorkflowController extends Controller
{
    public function index(Request $request)
    {
        return Inertia::render('Settings/Workflow/Index', [
            'actions' => Action::query()->with(['decisions', 'segment'])->withCount('activities')->get(),
            'decisions' => Decision::query()->with('actions')->withCount('activities')->get(),
            'segments' => Segment::query()->get(),
        ]);
    }

    public function storeAction(Request $request)
    {
        $attributes = $request->validate([
            'name' => 'required|string|max:50',
            'color_tag' => 'nullable|string|max:25',
            'segment_id' => 'nullable|integer|exists:segments,id',
            'decisions' => 'nullable|array',
            'decisions.*.id' => 'required_with:decisions.*|integer|exists:decisions,id',
            'decisions.*.name' => 'required_with:decisions.*|string|max:50',
        ]);

        $decisionIds = collect($attributes['decisions'] ?? [])->pluck('id')->toArray();

        \DB::transaction(function () use ($attributes, $decisionIds) {
            /** @var \App\Models\Action $row */
            $row = Action::create([
                'name' => $attributes['name'],
                'color_tag' => $attributes['color_tag'] ?? null,
                'segment_id' => $attributes['segment_id'] ?? null,
            ]);

            if (!empty($decisionIds)) {
                $row->decisions()->sync($decisionIds);
            }
        });

        return to_route('settings.workflow')->with('success', 'Action created successfully!');
    }

    public function updateAction(int $id, Request $request)
    {
        $row = Action::findOrFail($id);

        $attributes = $request->validate([
            'name' => 'required|string|max:50',
            'color_tag' => 'nullable|string|max:25',
            'segment_id' => 'nullable|integer|exists:segments,id',
            'decisions' => 'nullable|array',
            'decisions.*.id' => 'required_with:decisions.*|integer|exists:decisions,id',
            'decisions.*.name' => 'required_with:decisions.*|string|max:50'
        ]);

        $decisionIds = collect($attributes['decisions'] ?? [])->pluck('id')->toArray();

        \DB::transaction(function() use ($attributes, $decisionIds, $row) {
            $row->update([
                'name' => $attributes['name'],
                'color_tag' => $attributes['color_tag'],
                'segment_id' => $attributes['segment_id'] ?? null,
            ]);
            $row->decisions()->sync($decisionIds);
        });

        return to_route('settings.workflow')->with('success', 'Update successful!');
    }

    public function storeDecision(Request $request)
    {
        $attributes = $request->validate([
            'name' => 'required|string|max:50',
            'color_tag' => 'nullable|string|max:25',
            'actions' => 'nullable|array',
            'actions.*.id' => 'required_with:actions.*|integer|exists:actions,id',
            'actions.*.name' => 'required_with:actions.*|string|max:50',
        ]);

        $actionIds = collect($attributes['actions'] ?? [])->pluck('id')->toArray();

        \DB::transaction(function () use ($attributes, $actionIds) {
            /** @var \App\Models\Decision $row */
            $row = Decision::create([
                'name' => $attributes['name'],
                'color_tag' => $attributes['color_tag'] ?? null,
            ]);

            if (!empty($actionIds)) {
                $row->actions()->sync($actionIds);
            }
        });

        return to_route('settings.workflow')->with('success', 'Decision created successfully!');
    }

    public function updateDecision(int $id, Request $request)
    {
        $row = Decision::findOrFail($id);

        $attributes = $request->validate([
            'name' => 'required|string|max:50',
            'color_tag' => 'nullable|string|max:25',
            'actions' => 'nullable|array',
            'actions.*.id' => 'required_with:actions.*|integer|exists:actions,id',
            'actions.*.name' => 'required_with:actions.*|string|max:50',
        ]);

        $actionIds = collect($attributes['actions'] ?? [])->pluck('id')->toArray();

        \DB::transaction(function () use ($attributes, $actionIds, $row) {
            $row->update([
                'name' => $attributes['name'],
                'color_tag' => $attributes['color_tag'] ?? null,
            ]);
            $row->actions()->sync($actionIds);
        });

        return to_route('settings.workflow')->with('success', 'Decision updated successfully!');
    }

    public function destroyAction(int $id)
    {
        $row = Action::findOrFail($id);
        if ($row->activities()->exists()) {
            return back()->with('error', 'Cannot delete action because dependent activities exist.');
        }

        \DB::transaction(function () use ($row) {
            $row->decisions()->detach();
            $row->delete();
        });
        return back()->with('success', 'Action deleted successfully!');
    }

    public function destroyDecision(int $id)
    {
        $row = Decision::findOrFail($id);
        if ($row->activities()->exists()) {
            return back()->with('error', 'Cannot delete decision because dependent activities exist.');
        }

        \DB::transaction(function () use ($row) {
            $row->actions()->detach();
            $row->delete();
        });
        return back()->with('success', 'Decision deleted successfully!');
    }
}