<?php

namespace Modules\TimelineScheduling\Http\Controllers;

use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
use Modules\ProjectManagement\Enums\WeatherCondition;
use Modules\ProjectManagement\Models\Project;
use Modules\ProjectManagement\Models\ProjectMilestone;

class MilestoneController extends Controller
{
    public function index(Request $request)
    {
        $projectUlid = $request->query('project');
        $project = null;

        if ($projectUlid) {
            $project = Project::where('ulid', $projectUlid)->firstOrFail();
            $project->load([
                'tasks' => fn ($q) => $q->select('id', 'project_id')->with('delays'),
                'milestones',
            ]);
        }

        return \Inertia\Inertia::render('TimelineScheduling::Timeline/Index', [
            'project' => $project,
            'projects' => Project::select('id', 'ulid', 'name')->get(),
            'milestones' => $project ? $project->milestones->map(fn ($m) => array_merge($m->toArray(), [
                'is_completed' => $m->is_completed,
                'is_overdue' => $m->is_overdue,
                'status' => $m->status,
                'status_color' => $m->status_color,
                'days_delayed' => $m->days_delayed,
            ])) : [],
            'milestoneStats' => $project ? [
                'total' => $project->milestones->count(),
                'completed' => $project->milestones->where('actual_date', '!=', null)->count(),
                'completion_percentage' => $project->milestone_completion,
                'weather_delay_days' => $project->weather_delay_days,
            ] : null,
            'weatherConditions' => collect(WeatherCondition::cases())->map(fn ($c) => [
                'value' => $c->value,
                'label' => $c->label(),
                'icon' => $c->icon(),
            ]),
            'allowedTransitions' => $project ? collect($project->status->allowedTransitions())->map(fn ($s) => [
                'value' => $s->value,
                'label' => $s->label(),
            ]) : [],
        ]);
    }

    public function store(Request $request)
    {
        $validated = $request->validate([
            'project_id' => 'required|exists:projects,id',
            'name' => 'required|string|max:255',
            'description' => 'nullable|string',
            'planned_date' => 'nullable|date',
            'weight_percentage' => 'required|numeric|min:0|max:100',
        ]);

        $project = Project::findOrFail($validated['project_id']);
        $validated['sort_order'] = $project->milestones()->count();
        $validated['is_default'] = false;

        ProjectMilestone::create($validated);

        return back()->with('success', 'Milestone added.');
    }

    public function update(Request $request, ProjectMilestone $milestone)
    {
        $validated = $request->validate([
            'name' => 'sometimes|required|string|max:255',
            'description' => 'nullable|string',
            'planned_date' => 'nullable|date',
            'actual_date' => 'nullable|date',
            'weight_percentage' => 'sometimes|numeric|min:0|max:100',
            'weather_impacted' => 'sometimes|boolean',
            'weather_condition' => 'nullable|string',
            'weather_delay_days' => 'sometimes|integer|min:0',
            'weather_notes' => 'nullable|string|max:2000',
        ]);

        // Clear weather fields if not impacted
        if (isset($validated['weather_impacted']) && !$validated['weather_impacted']) {
            $validated['weather_condition'] = null;
            $validated['weather_delay_days'] = 0;
            $validated['weather_notes'] = null;
        }

        $milestone->update($validated);

        return back()->with('success', 'Milestone updated.');
    }

    public function destroy(ProjectMilestone $milestone)
    {
        $milestone->delete();

        return back()->with('success', 'Milestone removed.');
    }
}