<?php

namespace Lucent\Http\Controller;

use Carbon\Carbon;
use Illuminate\Http\Request;
use Lucent\Account\AccountService;
use Lucent\Channel\ChannelService;
use Lucent\Core\Auth\AuthModule;
use Lucent\Core\Data\RecordField;
use Lucent\Core\Repository\SchemaRepo;
use Lucent\Id\Id;
use Lucent\LucentException;
use Lucent\Query\Operator\OperatorRegistry;
use Lucent\Query\Query;
use Lucent\Record\InputData\EdgeInputData;
use Lucent\Record\InputData\RecordInputData;
use Lucent\Record\Manager;
use Lucent\Core\Repository\RecordRepo;
use Lucent\Record\RecordService;
use Lucent\Record\Status;
use Lucent\Schema\Ui\Reference;
use Lucent\Schema\Validator\ValidatorException;
use Lucent\Svelte\Svelte;
use Lucent\ViewModel\ViewModel;
use Lucent\Core\Data\Record;
use function Lucent\Response\fail;
use function Lucent\Response\ok;

class RecordController
{
    public function __construct(
        private readonly RecordService $recordService,
        private readonly AccountService $accountService,
        private readonly ChannelService $channelService,
        private readonly Svelte $svelte,
        private readonly Query $query,
        private readonly Manager $recordManager,
        private readonly OperatorRegistry $operatorRegistry,
        private readonly ViewModel $viewModel,
    ) {}

    public function index(Request $request)
    {
        $schemaId = $request->route("id");
        $schemas = SchemaRepo::all();
        $schema = collect($schemas)->firstWhere("id", $schemaId);
        // $users = $this->accountService->all();
        $users = [];
        // $schema = $this->channelService->getSchema($schemaName)->get();
        // $urlParams = $request->all();
        // $sort = data_get($urlParams, "sort") ?? $schema->sortBy;
        // $filter = data_get($urlParams, "filter") ?? [];

        // $arguments = array_merge(
        //     [
        //         "schema" => $schema->name,
        //         "status_in" => "draft,published",
        //     ],
        //     $filter,
        // );

        // $skip = data_get($urlParams, "skip") ?? 0;
        $skip = 0;
        $limit = 30;
        $records = [];
        // $graphArray = null;

        // $graph = $this->query
        //     ->filter($arguments)
        //     ->notLinked($request->input("notlinked") ?? "")
        //     ->limit($limit)
        //     ->status(explode(",", $arguments["status_in"]))
        //     ->skip($skip)
        //     ->sort($sort)
        //     ->childrenFields($schema?->visible ?? [])
        //     ->childrenDepth(1)
        //     ->parentsDepth(0)
        //     ->runWithCount();

        // $records = $graph->getRootRecords()->toArray();

        $data = [
            "schemas" => $schemas,
            "schema" => $schema,
            "users" => $users,
            "records" => $records,
            // "graph" => toArray($graph),
            // "systemFields" => array_values(System::list()),
            // "operators" => $this->operatorRegistry->all(),
            // "sortParam" => $sort,
            // "sortField" => $schema->fields
            //     ->merge(array_values(System::list()))
            //     ->firstWhere(
            //         fn($field) => $field->name === $sort ||
            //             "-" . $field->name === $sort ||
            //             "data." . $field->name === $sort ||
            //             "-data." . $field->name === $sort,
            //     ),
            // "limit" => $limit,
            // "skip" => $skip,
            // "total" => $graph->total ?? 0,
            // "filter" => $request->input("filter") ?? [],
            // "inModal" => true,
            // "isWritable" => in_array(
            //     $schemaName,
            //     $this->accountService->currentWritableSchemas(),
            // ),
        ];

        // if ($request->ajax()) {
        //     $data["modalUrl"] = $request->fullUrl();
        //     if (str_starts_with(config("lucent.url"), "https")) {
        //         $data["modalUrl"] = str_replace(
        //             "http://",
        //             "https://",
        //             $request->fullUrl(),
        //         );
        //     }
        //     return $data;
        // }
        // $data["inModal"] = false;
        return Svelte::view(
            view: "contentIndex",
            title: "Records",
            data: $data,
        );
    }

    public function exportCSV(Request $request)
    {
        $schemaName = $request->route("schemaName");
        $schema = $this->channelService->channel->schemas
            ->where("name", $schemaName)
            ->first();

        $urlParams = $request->all();

        $sort = data_get($urlParams, "sort") ?? "-_sys.updatedAt";
        $filter = data_get($urlParams, "filter") ?? [];
        $arguments = array_merge(
            [
                "schema" => $schema->name,
                "status_in" => "draft,published",
            ],
            $filter,
        );

        $records = $this->query
            ->filter($arguments)
            ->limit(-1)
            ->status(explode(",", $arguments["status_in"]))
            ->childrenDepth(1)
            // ->skip($skip)
            ->sort($sort)
            ->run()
            ->tree();

        header("Content-Type: application/csv");
        header(
            'Content-Disposition: attachment; filename="' .
                $schemaName .
                '.csv";',
        );
        $handle = fopen("php://output", "w");
        $relationColumns = $this->makeCsvRelationColumns($schema);
        $csvRow = [
            "id",
            ...array_keys($records[0]->data->toArray()),
            ...$relationColumns,
        ];
        fputcsv($handle, $csvRow, ",");
        foreach ($records as $record) {
            $csvRow = [$record->id, ...$record->data->toArray()];
            $csvRow = array_merge(
                $csvRow,
                $this->makeCsvRelationColumnValues($schema, $record->_children),
            );
            $csvRow = array_values($csvRow);
            fputcsv($handle, $csvRow, ",");
        }
        fclose($handle);
        echo $handle;
        exit();
    }

    private function makeCsvRelationColumns($schema): array
    {
        return $schema->fields
            ->filter(fn($f) => get_class($f) === Reference::class)
            ->reduce(function ($c, $f) {
                $c[] = $f->name . " id";
                $c[] = $f->name . " name";
                return $c;
            }, []);
    }

    private function makeCsvRelationColumnValues($schema, $children): array
    {
        return $schema->fields
            ->filter(fn($f) => get_class($f) === Reference::class)
            ->reduce(function ($c, $f) use ($children) {
                $fieldRecords = data_get($children, $f->name);
                if (empty($fieldRecords)) {
                    $c[] = "";
                    $c[] = "";
                } elseif (count($fieldRecords) === 1) {
                    $c[] = data_get($fieldRecords, "0.id");
                    $c[] = $this->viewModel->getRecordName($fieldRecords[0]);
                } else {
                    $c[] = collect($fieldRecords)->pluck("id")->join("::");
                    $c[] = collect($fieldRecords)
                        ->pluck("data.name")
                        ->join("::");
                }
                return $c;
            }, []);
    }

    public function edit(Request $request)
    {
        $rid = $request->route("rid");

        $graph = $this->query
            ->filter(["id" => $rid])
            ->limit(1)
            ->skip(0)
            ->childrenDepth(2)
            ->childrenLimit(200)
            ->parentsDepth(1)
            ->parentsLimit(200)
            ->run();

        if ($graph->records->isEmpty()) {
            return $this->svelte->render(
                layout: "channel",
                view: "recordNotFound",
                title: "Record Not Found",
            );
        }

        $record = $graph->records->first();

        if (
            !in_array(
                $record->schema,
                $this->accountService->currentReadableSchemas(),
            )
        ) {
            return $this->svelte->render(
                layout: "channel",
                view: "recordNotFound",
                title: "Schema Not Found",
            );
        }

        $schema = $this->channelService->getSchema($record->schema)->get();
        $recordHistory = $this->recordManager
            ->fromSession($request->session())
            ->push($rid)
            ->getRecords($rid);
        return $this->svelte->render(
            layout: "channel",
            view: "recordEdit",
            title: "Edit Record",
            data: [
                "schema" => $schema,
                "graph" => toArray($graph),
                "record" => toArray($record),
                "users" => $this->accountService->all(),
                "recordHistory" => $recordHistory,
                "isWritable" => in_array(
                    $record->schema,
                    $this->accountService->currentWritableSchemas(),
                ),
            ],
        );
    }

    public function suggestions(Request $request)
    {
        $arguments = [
            "schema" => $request->input("schema"),
        ];

        if ($request->input("value")) {
            if (in_array($request->input("ui"), ["text", "date"])) {
                $arguments[
                    "data." . $request->input("field") . "_regex"
                ] = $request->input("value");
            } elseif ($request->input("ui") == "number") {
                $arguments[
                    "data." . $request->input("field") . "_eqnum"
                ] = floatval($request->input("value"));
            } elseif ($request->input("ui") == "date") {
            } elseif ($request->input("ui") == "search") {
                $arguments["search_regex"] = $request->input("value");
            }
        }

        $records = $this->query->filter($arguments)->limit(10)->tree();

        if ($records->isEmpty()) {
            return ok([]);
        }

        return ok($records->toArray());
    }

    public function postCreate(Request $request)
    {
        $schemaId = $request->input("schemaId");
        $title = $request->input("title");
        $now = Carbon::now();
        $userId = AuthModule::getCurrentUserId();

        $titleField = new RecordField(
            id: "_title",
            locale: "main",
            value: $title,
            createdAt: $now,
            createdBy: $userId,
            updatedAt: $now,
            updatedBy: $userId,
            version: 1,
        );

        $record = new Record(
            id: Id::new(),
            schemaId: $schemaId,
            draftData: [$titleField],
            liveData: [],
            createdAt: $now,
            createdBy: $userId,
            publishedAt: null,
            publishedBy: null,
            trashedAt: null,
            trashedBy: null,
        );

        RecordRepo::insert($record);
        return ok(toArray($record));
    }

    public function save(Request $request)
    {
        $recordId = $request->input("record.id");
        try {
            if ($request->input("isCreateMode")) {
                $recordId = $this->recordService->create(
                    data: new RecordInputData(
                        $request->input("record.schema"),
                        $recordId ?? "",
                        $request->input("record.data"),
                        Status::from($request->input("record.status")),
                    ),
                    edges: array_map(
                        EdgeInputData::fromArray(...),
                        $request->input("edges") ?? [],
                    ),
                );
            } else {
                $this->recordService->updateWithEdges(
                    id: $request->input("record.id"),
                    data: $request->input("record.data"),
                    status: Status::from($request->input("record.status")),
                    edges: array_map(
                        EdgeInputData::fromArray(...),
                        $request->input("edges") ?? [],
                    ),
                );
            }

            $newGraph = $this->query
                ->filter(["id" => $recordId])
                ->limit(10)
                ->childrenDepth(1)
                ->parentsDepth(1)
                ->run();
        } catch (ValidatorException $th) {
            return fail($th->getValidatorErrors());
        } catch (LucentException $th) {
            return fail($th);
        }
        return ok(toArray($newGraph));
    }

    public function clone(Request $request)
    {
        try {
            $newRecordId = $this->recordService->clone(
                recordId: $request->route("rid"),
            );
        } catch (LucentException $th) {
            return fail($th);
        } catch (ValidatorException $e) {
            return fail($e);
        }
        return ok(["id" => $newRecordId]);
    }

    public function status(Request $request)
    {
        $ids = array_map(fn($rec) => $rec["id"], $request->input("records"));

        $this->recordService->changeStatusBulk(
            status: $request->route("status"),
            recordsIds: $ids,
        );
        return ok();
    }

    public function emptyTrash(Request $request)
    {
        $this->recordService->emptyTrash($request->route("schemaName"));
        return redirect(
            $this->channelService->channel->lucentUrl .
                "/content/" .
                $request->route("schemaName"),
        );
    }

    public function delete(Request $request)
    {
        $ids = $request->input("ids");

        try {
            $this->recordService->deleteMany($ids);
        } catch (Throwable $th) {
            return fail($th);
        }
        return ok();
    }

    public function rollback(Request $request)
    {
        try {
            $this->recordService->rollback(
                recordId: $request->route("rid"),
                version: (int) $request->route("version"),
            );
        } catch (ValidatorException $th) {
            return fail($th->getFirstValidatorError());
        } catch (LucentException | Throwable $th) {
            return fail($th);
        }
        return ok();
    }
}