/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package whisk

import (
    "errors"
    "fmt"
    "net/url"
    "reflect"

    "github.com/fatih/color"
    "github.com/google/go-querystring/query"
    "github.com/hokaccha/go-prettyjson"
    "github.com/apache/incubator-openwhisk-client-go/wski18n"
)

// Sortable items are anything that needs to be sorted for listing purposes.
type Sortable interface {
    // Compare(sortable) compares an two sortables and returns true
    //      if the item calling the Compare method is less than toBeCompared.
    //      Sorts alphabetically by default, can have other parameters to sort by
    //      passed by sortByName.
    Compare(toBeCompared Sortable) (bool)
}

// Printable items are anything that need to be printed for listing purposes.
type Printable interface {
    ToHeaderString() string   // Prints header information of a Printable
    ToSummaryRowString() string     // Prints summary info of one Printable
}

// addOptions adds the parameters in opt as URL query parameters to s.  opt
// must be a struct whose fields may contain "url" tags.
func addRouteOptions(route string, options interface{}) (*url.URL, error) {
    Debug(DbgInfo, "Adding options %+v to route '%s'\n", options, route)
    u, err := url.Parse(route)
    if err != nil {
        Debug(DbgError,"url.Parse(%s) error: %s\n", route, err)
        errStr := wski18n.T("Unable to parse URL '{{.route}}': {{.err}}",
            map[string]interface{}{"route": route, "err": err})
        werr := MakeWskError(errors.New(errStr), EXIT_CODE_ERR_GENERAL, DISPLAY_MSG, NO_DISPLAY_USAGE)
        return nil, werr
    }

    v := reflect.ValueOf(options)
    if v.Kind() == reflect.Ptr && v.IsNil() {
        return u, nil
    }

    qs, err := query.Values(options)
    if err != nil {
        Debug(DbgError,"query.Values(%#v) error: %s\n", options, err)
        errStr := wski18n.T("Unable to process URL query options '{{.options}}': {{.err}}",
            map[string]interface{}{"options": fmt.Sprintf("%#v", options), "err": err})
        werr := MakeWskError(errors.New(errStr), EXIT_CODE_ERR_GENERAL, DISPLAY_MSG, NO_DISPLAY_USAGE)
        return nil, werr
    }

    u.RawQuery = qs.Encode()
    Debug(DbgInfo,"Returning route options '%s' from input struct %+v\n", u.String(), options)
    return u, nil
}

func PrintJSON(v interface{}) {
    output, _ := prettyjson.Marshal(v)
    fmt.Fprintln(color.Output, string(output))
}