<?php

namespace App\Http\Controllers\API;

use App\Http\Controllers\Controller;
use App\Http\Requests\API\Task\BatchCreateItemRules;
use App\Http\Requests\API\Task\BatchCreateRequest;
use App\Http\Requests\API\Task\CreateOrUpdateRequest;
use App\Http\Resources\API\TaskDetailResource;
use App\Http\Resources\API\TaskResource;
use App\Models\CustomField;
use App\Models\Enums\ActionObjectType;
use App\Models\Enums\ObjectAction;
use App\Models\NamingRule;
use App\Models\Project;
use App\Models\Requirement;
use App\Models\Enums\TaskStatus;
use App\Models\Task;
use App\Repositories\ActionRepository;
use App\Repositories\CustomFieldRepository;
use App\Services\History\ModelChangeDetector;
use Carbon\Carbon;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Validator;

class TaskController extends Controller
{
    /**
     * Display a listing of the resource.
     */
    public function index(Request $request)
    {
        $tasks = Task::query()
            ->where("parent_id", 0)
            ->with(['children', 'assignTo', 'createdBy'])
            ->filter($request->all())
            ->allowed()
            ->paginate();

        return TaskResource::collection($tasks);
    }

    /**
     * Store a newly created resource in storage.
     */
    public function store(CreateOrUpdateRequest $request, CustomFieldRepository $customFieldRepo)
    {
        $requirement = $request->has('requirement_id')
            ? Requirement::query()->findOrFail($request->get("requirement_id"))
            : null;

        $formData = [
            ...$request->all(),
            'company_id' => Auth::user()->company_id,
            'created_by' => Auth::id(),
            'whitelist' => $request->whitelist ? sprintf(",%s,", implode(',', $request->whitelist)) : null,
            'asset_id' => $requirement?->asset_id,
            'requirement_group_id'=> $requirement?->requirement_group_id,
        ];

        if ($request->has("naming_rule_id") && $request->get("naming_rule_id") > 0) {
            $keys = $customFieldRepo->keysByGroup($request->get("naming_rule_id"));
            $formData['naming_rules'] = $request->only($keys);
        }

        $task = Task::create($formData);

        ActionRepository::createByTask($task, ObjectAction::CREATED);

        return $this->created();
    }

    /**
     * Display the specified resource.
     */
    public function show(string $id)
    {
        $task = Task::query()->allowed($id)->findOrFail($id);

        return new TaskDetailResource($task);
    }

    public function start(Request $request, string $id)
    {
        $task = Task::query()->allowed($id)->findOrFail($id);
        $task->status = TaskStatus::DOING->value;
        $changes = ModelChangeDetector::detector(ActionObjectType::TASK, $task);
        $task->save();

        ActionRepository::createByTask(
            $task,
            ObjectAction::STARTED,
            $request->get("comment"),
            objectChanges: $changes
        );

        return $this->noContent();
    }

    public function pause(Request $request, string $id)
    {
        $task = Task::query()->allowed($id)->findOrFail($id);

        $task->status = TaskStatus::PAUSE->value;
        $changes = ModelChangeDetector::detector(ActionObjectType::TASK, $task);
        $task->save();

        ActionRepository::createByTask(
            $task, ObjectAction::PAUSED, $request->get("comment"), objectChanges: $changes
        );

        return $this->noContent();
    }

    public function closed(Request $request, string $id)
    {
        $task = Task::query()->allowed($id)->findOrFail($id);

        $task->status = TaskStatus::CLOSED->value;
        $changes = ModelChangeDetector::detector(ActionObjectType::TASK, $task);
        $task->save();

        ActionRepository::createByTask(
            $task, ObjectAction::CLOSED, $request->get("comment"), objectChanges: $changes
        );

        return $this->noContent();
    }

    public function done(Request $request, string $id)
    {
        $task = Task::query()->allowed($id)->findOrFail($id);

        $task->fill([
            'status' => TaskStatus::DONE->value,
            'finished_by' => Auth::user()->id,
            'finished_at' => Carbon::now(),
        ]);

        $changes = ModelChangeDetector::detector(ActionObjectType::TASK, $task);
        $task->save();

        ActionRepository::createByTask(
            $task, ObjectAction::DONE, $request->get("comment"), objectChanges: $changes
        );

        return $this->noContent();
    }

    public function cancel(Request $request, string $id)
    {
        $task = Task::query()->allowed($id)->findOrFail($id);

        $task->fill([
            'status' => TaskStatus::CANCEL->value,
            'finished_by' => Auth::user()->id,
            'finished_at' => Carbon::now(),
        ]);

        $changes = ModelChangeDetector::detector(ActionObjectType::TASK, $task);
        $task->save();

        ActionRepository::createByTask(
            $task, ObjectAction::CANCELED, $request->get("comment"), objectChanges: $changes
        );

        return $this->noContent();
    }

    /**
     * Update the specified resource in storage.
     */
    public function update(CreateOrUpdateRequest $request, string $id, CustomFieldRepository $customFieldRepo)
    {
        $task = Task::query()->allowed($id)->findOrFail($id);

        $requirement = $request->has('requirement_id') && $task->requirement_id != $request->get('requirement_id')
            ? Requirement::query()->findOrFail($request->get("requirement_id"))
            : null;

        $formData = [...$request->all(),
            'whitelist' => $request->whitelist ? sprintf(",%s,", implode(',', $request->whitelist)) : null,
            'asset_id' => $requirement?->asset_id,
        ];

        if ($request->has("naming_rule_id") && $request->get("naming_rule_id") > 0) {
            $keys = $customFieldRepo->keysByGroup($request->get("naming_rule_id"));
            $formData['naming_rules'] = $request->only($keys);
        }

        $task->fill($formData);
        $changes = ModelChangeDetector::detector(ActionObjectType::TASK, $task);
        $task->save();

        ActionRepository::createByTask($task, ObjectAction::EDITED, objectChanges: $changes);

        return $this->noContent();
    }

    /**
     * Remove the specified resource from storage.
     */
    public function destroy(string $id)
    {
        $task = Task::query()->allowed($id)->findOrFail($id);

        $task->delete();

        ActionRepository::createByTask($task, ObjectAction::DELETED);

        return $this->noContent();
    }

    public function batchStore(BatchCreateRequest $request, CustomFieldRepository $customFieldRepo)
    {
        $project = Project::query()->allowed($request->project_id)->find($request->project_id);

        $parsedItems = [];
        $previousItem = [];
        foreach ($request->items as $index => $item) {
            if ($index == 0) {
                $newItem = $item;
            } else {
                $newItem = [];
                foreach ($item as $k => $v) {
                    $newItem[$k] = $v == "ditto" ? data_get($previousItem, $k) : $v;
                }
            }

            $previousItem = $newItem;
            $parsedItems[] = $newItem;
        }

        $itemRules = new BatchCreateItemRules();
        foreach ($parsedItems as $index => $item) {
            $rules = $itemRules->rules($item);

            try {
                $validator = Validator::make($item, $rules);
                if ($validator->fails()) {
                    return $this->badRequest(sprintf("line: %d, %s", $index + 1, $validator->errors()->first()));
                }
            } catch (\Exception $e) {
                return $this->badRequest(sprintf("line: %d, %s", $index + 1, $e->getMessage()));
            }
        }

        foreach ($parsedItems as $item) {
            $namingRuleId = data_get($item, "naming_rule_id", 0);
            if ($namingRuleId > 0) {
                $keys = $customFieldRepo->keysByGroup($namingRuleId);
                $item['naming_rules'] = collect($item)->only($keys)->toArray();
            }

            $task = Task::query()->create([
                ...$item,
                'project_id' => $project->id,
                'parent_id' => 0,
                'company_id' => Auth::user()->company_id,
                'created_by' => Auth::id(),
            ]);

            ActionRepository::createByTask($task, ObjectAction::CREATED);
        }

        return $this->noContent();
    }
}