module.exports = function(RED) {
    var https = require('https');
    var http = require('http');
    var url = require('url');

    var OPERATIONS = {
        // Groups
        'groups:list':        { method:'GET',    path:'/ocs/v2.php/cloud/groups', query:['search','limit','offset'] },
        'groups:details':     { method:'GET',    path:'/ocs/v2.php/cloud/groups/details', query:['search','limit','offset'] },
        'groups:get':         { method:'GET',    path:'/ocs/v2.php/cloud/groups/{groupId}' },
        'groups:users':       { method:'GET',    path:'/ocs/v2.php/cloud/groups/{groupId}/users' },
        'groups:usersDetails':{ method:'GET',    path:'/ocs/v2.php/cloud/groups/{groupId}/users/details', query:['search','limit','offset'] },
        // Users
        'users:list':         { method:'GET',    path:'/ocs/v2.php/cloud/users', query:['search','limit','offset'] },
        'users:details':      { method:'GET',    path:'/ocs/v2.php/cloud/users/details', query:['search','limit','offset'] },
        'users:disabled':     { method:'GET',    path:'/ocs/v2.php/cloud/users/disabled', query:['search','limit','offset'] },
        'users:create':       { method:'POST',   path:'/ocs/v2.php/cloud/users', body:['userid','password','displayName','email','quota','language'] },
        'users:get':          { method:'GET',    path:'/ocs/v2.php/cloud/users/{userId}' },
        'users:edit':         { method:'PUT',    path:'/ocs/v2.php/cloud/users/{userId}', body:['key','value'] },
        'users:editMulti':    { method:'PUT',    path:'/ocs/v2.php/cloud/users/{userId}/{collectionName}', body:['key','value'] },
        'users:delete':       { method:'DELETE', path:'/ocs/v2.php/cloud/users/{userId}' },
        'users:enable':       { method:'PUT',    path:'/ocs/v2.php/cloud/users/{userId}/enable' },
        'users:disable':      { method:'PUT',    path:'/ocs/v2.php/cloud/users/{userId}/disable' },
        'users:wipe':         { method:'POST',   path:'/ocs/v2.php/cloud/users/{userId}/wipe' },
        'users:current':      { method:'GET',    path:'/ocs/v2.php/cloud/user' },
        'users:editableFields':{ method:'GET',   path:'/ocs/v2.php/cloud/user/fields' },
        'users:editableFor':  { method:'GET',    path:'/ocs/v2.php/cloud/user/fields/{userId}' },
        'users:apps':         { method:'GET',    path:'/ocs/v2.php/cloud/user/apps' },
        'users:groups':       { method:'GET',    path:'/ocs/v2.php/cloud/users/{userId}/groups' },
        'users:groupsDetails':{ method:'GET',    path:'/ocs/v2.php/cloud/users/{userId}/groups/details' },
        'users:subadminDetails':{ method:'GET',  path:'/ocs/v2.php/cloud/users/{userId}/subadmins/details' },
        'users:addToGroup':   { method:'POST',   path:'/ocs/v2.php/cloud/users/{userId}/groups', body:['groupid'] },
        'users:removeFromGroup':{ method:'DELETE', path:'/ocs/v2.php/cloud/users/{userId}/groups', query:['groupid'] },
        'users:welcome':      { method:'POST',   path:'/ocs/v2.php/cloud/users/{userId}/welcome' },
        'users:searchByPhone':{ method:'POST',   path:'/ocs/v2.php/cloud/users/search/by-phone', body:['location','search'] },
        // App config
        'config:setApp':      { method:'POST',   path:'/ocs/v2.php/apps/provisioning_api/api/v1/config/apps/{app}/{key}', body:['value'] },
        // Preferences
        'pref:set':           { method:'POST',   path:'/ocs/v2.php/apps/provisioning_api/api/v1/config/users/{appId}/{configKey}', body:['configValue'] },
        'pref:delete':        { method:'DELETE', path:'/ocs/v2.php/apps/provisioning_api/api/v1/config/users/{appId}/{configKey}' },
        'pref:setMultiple':   { method:'POST',   path:'/ocs/v2.php/apps/provisioning_api/api/v1/config/users/{appId}', body:['configs'] },
        'pref:deleteMultiple':{ method:'DELETE', path:'/ocs/v2.php/apps/provisioning_api/api/v1/config/users/{appId}', query:['configKeys[]'] }
    };

    function ProvisioningNode(config) {
        RED.nodes.createNode(this, config);
        var node = this;
        this.configNode = RED.nodes.getNode(config.nextcloud);
        this.operation = config.operation || 'users:list';
        this.userId = config.userId; this.groupId = config.groupId;
        this.appId = config.appId; this.configKey = config.configKey;
        this.collectionName = config.collectionName; this.app = config.app; this.key = config.key;

        if (!this.configNode) { node.error("No NC config node"); return; }

        node.on('input', function(msg) {
            var op = OPERATIONS[msg.operation || node.operation];
            if (!op) { node.error("Unknown: "+(msg.operation||node.operation), msg); return; }

            var baseUrl = (node.configNode.baseUrl||'').replace(/\/+$/,'');
            var uname = node.configNode.credentials.username;
            var pw = node.configNode.credentials.password;

            var path = op.path
                .replace(/\{userId\}/g, msg.userId||node.userId||'')
                .replace(/\{groupId\}/g, msg.groupId||node.groupId||'')
                .replace(/\{appId\}/g, msg.appId||node.appId||'')
                .replace(/\{configKey\}/g, msg.configKey||node.configKey||'')
                .replace(/\{collectionName\}/g, msg.collectionName||node.collectionName||'')
                .replace(/\{app\}/g, msg.app||node.app||'')
                .replace(/\{key\}/g, msg.key||node.key||'');

            var qp = [];
            if (op.query) op.query.forEach(function(q) {
                var v = msg[q]!==undefined ? msg[q] : getF(node,q);
                if (v!==undefined&&v!=='') qp.push(encodeURIComponent(q)+'='+encodeURIComponent(v));
            });
            var fu = baseUrl+path+(qp.length?'?'+qp.join('&'):'');
            var pu = url.parse(fu);

            var h = {'OCS-APIRequest':'true','Accept':'application/json',
                'Authorization':'Basic '+Buffer.from(uname+':'+pw).toString('base64')};

            var bo={};
            if (op.body) op.body.forEach(function(b){
                var v=msg[b]!==undefined?msg[b]:getF(node,b);
                if(v!==undefined&&v!=='') bo[b]=v;
            });
            // Special: groups array for user creation, configs object
            if (msg.groups && Array.isArray(msg.groups)) bo.groups = msg.groups;
            if (msg.subadmin && Array.isArray(msg.subadmin)) bo.subadmin = msg.subadmin;
            if (msg.configs && typeof msg.configs==='object') bo.configs = msg.configs;

            var bs=null;
            if (Object.keys(bo).length>0) {h['Content-Type']='application/json'; bs=JSON.stringify(bo);}

            var o = {hostname:pu.hostname,port:pu.port||(pu.protocol==='https:'?443:80),
                path:pu.path,method:op.method,headers:h,rejectUnauthorized:false};
            node.log(op.method+' '+fu);
            var t = pu.protocol==='https:'?https:http;
            var r = t.request(o,function(res){
                var b='';res.on('data',function(c){b+=c;});
                res.on('end',function(){msg.statusCode=res.statusCode;msg.operation=msg.operation||node.operation;
                    try{msg.payload=JSON.parse(b);}catch(e){msg.payload=b;}node.send(msg);});
            });
            r.on('error',function(e){msg.error=e.message;node.error(op.method+' '+fu+' - '+e.message,msg);});
            if(bs) r.write(bs);
            r.end();
        });
    }
    function getF(node,n){var m={'search':node.bodySearch,'limit':node.bodyLimit,'offset':node.bodyOffset,'userid':node.bodyUserid,
        'password':node.bodyPassword,'displayName':node.bodyDisplayName,'email':node.bodyEmail,'quota':node.bodyQuota,
        'language':node.bodyLanguage,'key':node.bodyKey,'value':node.bodyValue,'groupid':node.bodyGroupid,
        'location':node.bodyLocation,'configValue':node.bodyConfigValue};return m[n];}
    RED.nodes.registerType("provisioning", ProvisioningNode);
};