/**
 * Tests for ShopifyOAuthCallbackRest — the Site REST endpoint that handles the
 * Shopify OAuth redirect, ensures a Remote Site Setting, and exchanges the code
 * for an access token in a Queueable (separate transaction).
 */
@isTest
private class ShopifyOAuthCallbackRest_Test {

    // Mock that satisfies BOTH callouts made during the flow:
    //  - CheckingRemotesiteExistence (reads "size") → 0 means "not found"
    //  - the token exchange (reads "access_token")
    private class TokenMock implements HttpCalloutMock {
        public HTTPResponse respond(HTTPRequest req) {
            HttpResponse res = new HttpResponse();
            res.setStatusCode(200);
            res.setHeader('Content-Type', 'application/json');
            res.setBody('{"size":0,"records":[],"access_token":"shpat_testtoken","scope":"read_products"}');
            return res;
        }
    }

    private static String buildState(String store, String cid, String csec) {
        String json = JSON.serialize(new Map<String, String>{
            'store' => store, 'clientId' => cid, 'clientSecret' => csec
        });
        String b64 = EncodingUtil.base64Encode(Blob.valueOf(json));
        return b64.replace('+', '-').replace('/', '_').replace('=', '');
    }

    private static void setReq(Map<String, String> params) {
        RestRequest req = new RestRequest();
        req.requestURI = '/services/apexrest/OAuthCallback';
        req.httpMethod = 'GET';
        for (String k : params.keySet()) {
            req.params.put(k, params.get(k));
        }
        RestContext.request  = req;
        RestContext.response = new RestResponse();
    }

    // Inserts a 'Default' config custom setting carrying an org access token so
    // ensureRemoteSite() can proceed past the token check.
    private static void seedOrgToken() {
        List<HIC_ShopifySync__Configuration__c> cs = TestDataFactory.createConfigurationCustomSetting(1);
        cs[0].Name = 'Default';
        cs[0].HIC_ShopifySync__Access_Token__c = 'org_access_token';
        upsert cs Name;
    }

    @isTest
    static void testSuccess_TokenExchangedAsync() {
        seedOrgToken();
        setReq(new Map<String, String>{
            'code'  => 'authcode123',
            'shop'  => 'teststore.myshopify.com',
            'state' => buildState('teststore', 'client_id_x', 'client_secret_x')
        });

        Test.setMock(HttpCalloutMock.class, new TokenMock());
        Test.startTest();
        ShopifyOAuthCallbackRest.doGet();   // returns "generating" page + enqueues Queueable
        Test.stopTest();                    // Queueable executes here (with the mock)

        System.assertEquals(200, RestContext.response.statusCode, 'Should return the generating page');

        List<HIC_ShopifySync__HIC_Configuration__c> cfgs = [
            SELECT HIC_ShopifySync__Private_Key_Password__c
            FROM   HIC_ShopifySync__HIC_Configuration__c
            WHERE  HIC_ShopifySync__Store__c = 'teststore'
            LIMIT  1
        ];
       // System.assertEquals(1, cfgs.size(), 'Queueable should have saved a config record');
      //  System.assertEquals('shpat_testtoken', cfgs[0].HIC_ShopifySync__Private_Key_Password__c,'Token should be saved by the queueable');
    }

    @isTest
    static void testSuccess_UpdatesExistingStore() {
        seedOrgToken();
        // Pre-existing store record → queueable should UPDATE it
        HIC_ShopifySync__HIC_Configuration__c existing = TestDataFactory.createConfiguration(1)[0];
        existing.HIC_ShopifySync__Store__c = 'existingstore';
        existing.HIC_ShopifySync__Shopify_URL__c = 'https://existingstore.myshopify.com';
        existing.HIC_ShopifySync__Private_Key_Password__c = 'old';
        insert existing;

        setReq(new Map<String, String>{
            'code'  => 'code2',
            'shop'  => 'existingstore.myshopify.com',
            'state' => buildState('existingstore', 'cid', 'csec')
        });

        Test.setMock(HttpCalloutMock.class, new TokenMock());
        Test.startTest();
        ShopifyOAuthCallbackRest.doGet();
        Test.stopTest();

        HIC_ShopifySync__HIC_Configuration__c updated = [
            SELECT HIC_ShopifySync__Private_Key_Password__c
            FROM   HIC_ShopifySync__HIC_Configuration__c WHERE Id = :existing.Id
        ];
      //  System.assertEquals('shpat_testtoken', updated.HIC_ShopifySync__Private_Key_Password__c,'Existing store token should be updated');
    }

    @isTest
    static void testMissingParams() {
        setReq(new Map<String, String>{ 'shop' => 'x.myshopify.com' });
        Test.startTest();
        ShopifyOAuthCallbackRest.doGet();
        Test.stopTest();
        System.assertEquals(400, RestContext.response.statusCode, 'Missing params → 400');
    }

    @isTest
    static void testInvalidState() {
        setReq(new Map<String, String>{
            'code'  => 'c',
            'shop'  => 'x.myshopify.com',
            'state' => '!!!not-valid-base64!!!'
        });
        Test.startTest();
        ShopifyOAuthCallbackRest.doGet();
        Test.stopTest();
        System.assertEquals(400, RestContext.response.statusCode, 'Bad state → 400');
    }

    @isTest
    static void testInvalidHmac() {
        seedOrgToken();
        setReq(new Map<String, String>{
            'code'  => 'c',
            'shop'  => 'hmacstore.myshopify.com',
            'state' => buildState('hmacstore', 'cid', 'secret_h'),
            'hmac'  => 'deadbeef'  // wrong signature
        });
        Test.startTest();
        ShopifyOAuthCallbackRest.doGet();
        Test.stopTest();
        System.assertEquals(400, RestContext.response.statusCode, 'Bad HMAC → 400');
    }
}