<?php


namespace App\Services;


use App\LinkCode;
use App\UserLink;
use Carbon\Carbon;

class LodestoneLinkingService
{
    private $codeGeneratorService;
    private $lodestoneCacheService;
    private $lodestoneApiService;

    public function __construct(
        CodeGeneratorService $codeGeneratorService,
        LodestoneCacheService $lodestoneCacheService,
        LodestoneApiService $lodestoneApiService
    )
    {
        $this->codeGeneratorService = $codeGeneratorService;
        $this->lodestoneCacheService = $lodestoneCacheService;
        $this->lodestoneApiService = $lodestoneApiService;
    }

    public function getLinkDiscord($lodestoneId, $discordUserId) {
        // Check already linked
        if (UserLink::where('lodestoneId', $lodestoneId)->count() > 0) {
            return [
                'linked' => true,
                'linkCode' => null,
                'expires' => null
            ];
        }

        // Check code exists
        $linkCode = LinkCode::where('lodestoneId', $lodestoneId)->first();
        $expirationTime = Carbon::now()->addMinutes(5);
        if ($linkCode !== null && $linkCode->expires > Carbon::now()) {
            $linkCode->expires = $expirationTime;
            $linkCode->save();
        } else {
            if ($linkCode !== null)
                $linkCode->delete();
            $code = $this->codeGeneratorService->generateCode('discord');
            $linkCode = LinkCode::create([
                'lodestoneId' => $lodestoneId,
                'discordUserId' => $discordUserId,
                'expires' => $expirationTime,
                'code' => $code
            ]);
        }

        return [
            'linked' => false,
            'linkCode' => $linkCode->code,
            'expires' => $linkCode->expires
        ];
    }

    public function getLinkWebsite($lodestoneId, $hostname, $websiteUserId) {
        // Check already linked
        if (UserLink::where('lodestoneId', $lodestoneId)->count() > 0) {
            return [
                'linked' => true,
                'linkCode' => null,
                'expires' => null
            ];
        }

        // Check code exists
        $linkCode = LinkCode::where('lodestoneId', $lodestoneId)->first();
        $expirationTime = Carbon::now()->addMinutes(5);
        if ($linkCode !== null && $linkCode->expires > Carbon::now()) {
            $linkCode->expires = $expirationTime;
            $linkCode->save();
        } else {
            if ($linkCode !== null)
                $linkCode->delete();
            $code = $this->codeGeneratorService->generateCode('discord');
            $linkCode = LinkCode::create([
                'lodestoneId' => $lodestoneId,
                'websiteHostname' => $hostname,
                'websiteUserId' => $websiteUserId,
                'expires' => $expirationTime,
                'code' => $code
            ]);
        }

        return [
            'linked' => false,
            'linkCode' => $linkCode->code,
            'expires' => $linkCode->expires
        ];
    }

    public function validateLinkDiscord($lodestoneId, $discordUserId, $code)
    {
        $character = $this->lodestoneCacheService->getCharacterById($lodestoneId, $this->lodestoneApiService)->content;

        $linkCode = LinkCode::where('expires', '>', Carbon::now())
            ->where('lodestoneId', $lodestoneId)
            ->where('discordUserId', $discordUserId)
            ->first();

        if ($linkCode === null) {
            // There is no code for that user
            return $this->getLinkDiscord($lodestoneId, $discordUserId);
        }

        if ($linkCode->code !== $code) {
            // The provided code is not valid
            return [
                'linked' => false,
                'error' => 'Invalid code'
            ];
        }

        UserLink::updateOrCreate([
            'lodestoneId' => $lodestoneId
        ], [
            'discordUserId' => $discordUserId
        ]);
        $linkCode->delete();

        return [
            'linked' => true,
            'lodestoneId' => $character['Character']['ID'],
            'server' => $character['Character']['Server'],
            'name' => $character['Character']['Name'],
            'discordUserId' => $discordUserId
        ];
    }

    public function validateLinkWebsite($lodestoneId, $hostname, $websiteUserId, $code)
    {
        $character = $this->lodestoneCacheService->getCharacterById($lodestoneId, $this->lodestoneApiService)->content;

        $linkCode = LinkCode::where('expires', '>', Carbon::now())
            ->where('lodestoneId', $lodestoneId)
            ->where('websiteHostname', $hostname)
            ->where('websiteUserId', $websiteUserId)
            ->first();

        if ($linkCode === null) {
            // There is no code for that user
            return $this->getLinkWebsite($lodestoneId, $hostname, $websiteUserId);
        }

        if ($linkCode->code !== $code) {
            // The provided code is not valid
            return [
                'linked' => false,
                'error' => 'Invalid code'
            ];
        }

        UserLink::updateOrCreate([
            'lodestoneId' => $lodestoneId
        ], [
            'websiteHostname' => $hostname,
            'websiteUserId' => $websiteUserId
        ]);
        $linkCode->delete();

        return [
            'linked' => true,
            'lodestoneId' => $character['Character']['ID'],
            'server' => $character['Character']['Server'],
            'name' => $character['Character']['Name'],
            'websiteHostname' => $hostname,
            'websiteUserId' => $websiteUserId
        ];
    }
}