/*
 * 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"
	"github.com/apache/incubator-openwhisk-client-go/wski18n"
	"net/http"
	"net/url"
	"strings"
)

type PackageService struct {
	client *Client
}

type PackageInterface interface {
	GetName() string
}

// Use this struct to represent the package/binding sent from the Whisk server
// Binding is a bool ???MWD20160602 now seeing Binding as a struct???
type Package struct {
	Namespace   string      `json:"namespace,omitempty"`
	Name        string      `json:"name,omitempty"`
	Version     string      `json:"version,omitempty"`
	Publish     *bool       `json:"publish,omitempty"`
	Annotations KeyValueArr `json:"annotations,omitempty"`
	Parameters  KeyValueArr `json:"parameters,omitempty"`
	Binding     *Binding    `json:"binding,omitempty"`
	Actions     []Action    `json:"actions,omitempty"`
	Feeds       []Action    `json:"feeds,omitempty"`
}

func (p *Package) GetName() string {
	return p.Name
}

// Use this struct when creating a binding
// Publish is NOT optional; Binding is a namespace/name object, not a bool
type BindingPackage struct {
	Namespace   string      `json:"-"`
	Name        string      `json:"-"`
	Version     string      `json:"version,omitempty"`
	Publish     *bool       `json:"publish,omitempty"`
	Annotations KeyValueArr `json:"annotations,omitempty"`
	Parameters  KeyValueArr `json:"parameters,omitempty"`
	Binding     `json:"binding"`
}

func (p *BindingPackage) GetName() string {
	return p.Name
}

type Binding struct {
	Namespace string `json:"namespace,omitempty"`
	Name      string `json:"name,omitempty"`
}

type BindingUpdates struct {
	Added   []string `json:"added,omitempty"`
	Updated []string `json:"updated,omitempty"`
	Deleted []string `json:"deleted,omitempty"`
}

type PackageListOptions struct {
	Public bool `url:"public,omitempty"`
	Limit  int  `url:"limit"`
	Skip   int  `url:"skip"`
	Since  int  `url:"since,omitempty"`
	Docs   bool `url:"docs,omitempty"`
}

// Compare(sortable) compares xPackage to sortable for the purpose of sorting.
// REQUIRED: sortable must also be of type Package.
// ***Method of type Sortable***
func (xPackage Package) Compare(sortable Sortable) bool {
	// Sorts alphabetically by NAMESPACE -> PACKAGE_NAME
	packageToCompare := sortable.(Package)

	var packageString string
	var compareString string

	packageString = strings.ToLower(fmt.Sprintf("%s%s", xPackage.Namespace,
		xPackage.Name))
	compareString = strings.ToLower(fmt.Sprintf("%s%s", packageToCompare.Namespace,
		packageToCompare.Name))

	return packageString < compareString
}

// ToHeaderString() returns the header for a list of actions
func (pkg Package) ToHeaderString() string {
	return fmt.Sprintf("%s\n", "packages")
}

// ToSummaryRowString() returns a compound string of required parameters for printing
//   from CLI command `wsk package list`.
// ***Method of type Sortable***
func (xPackage Package) ToSummaryRowString() string {
	publishState := wski18n.T("private")

	if xPackage.Publish != nil && *xPackage.Publish {
		publishState = wski18n.T("shared")
	}

	return fmt.Sprintf("%-70s %s\n", fmt.Sprintf("/%s/%s", xPackage.Namespace,
		xPackage.Name), publishState)
}

func (s *PackageService) List(options *PackageListOptions) ([]Package, *http.Response, error) {
	route := fmt.Sprintf("packages")
	routeUrl, err := addRouteOptions(route, options)
	if err != nil {
		Debug(DbgError, "addRouteOptions(%s, %#v) error: '%s'\n", route, options, err)
		errStr := wski18n.T("Unable to build request URL: {{.err}}", map[string]interface{}{"err": err})
		werr := MakeWskErrorFromWskError(errors.New(errStr), err, EXIT_CODE_ERR_GENERAL, DISPLAY_MSG, NO_DISPLAY_USAGE)
		return nil, nil, werr
	}

	req, err := s.client.NewRequestUrl("GET", routeUrl, nil, IncludeNamespaceInUrl, AppendOpenWhiskPathPrefix, EncodeBodyAsJson, AuthRequired)
	if err != nil {
		Debug(DbgError, "http.NewRequestUrl(GET, %s, nil, IncludeNamespaceInUrl, AppendOpenWhiskPathPrefix, EncodeBodyAsJson, AuthRequired); error: '%s'\n", route, err)
		errStr := wski18n.T("Unable to create GET HTTP request for '{{.route}}': {{.err}}",
			map[string]interface{}{"route": route, "err": err})
		werr := MakeWskErrorFromWskError(errors.New(errStr), err, EXIT_CODE_ERR_GENERAL, DISPLAY_MSG, NO_DISPLAY_USAGE)
		return nil, nil, werr
	}

	var packages []Package
	resp, err := s.client.Do(req, &packages, ExitWithSuccessOnTimeout)
	if err != nil {
		Debug(DbgError, "s.client.Do() error - HTTP req %s; error '%s'\n", req.URL.String(), err)
		return nil, resp, err
	}

	return packages, resp, err

}

func (s *PackageService) Get(packageName string) (*Package, *http.Response, error) {
	// Encode resource name as a path (with no query params) before inserting it into the URI
	// This way any '?' chars in the name won't be treated as the beginning of the query params
	packageName = (&url.URL{Path: packageName}).String()
	route := fmt.Sprintf("packages/%s", packageName)

	req, err := s.client.NewRequest("GET", route, nil, IncludeNamespaceInUrl)
	if err != nil {
		Debug(DbgError, "http.NewRequest(GET, %s); error: '%s'\n", route, err)
		errStr := wski18n.T("Unable to create GET HTTP request for '{{.route}}': {{.err}}",
			map[string]interface{}{"route": route, "err": err})
		werr := MakeWskErrorFromWskError(errors.New(errStr), err, EXIT_CODE_ERR_GENERAL, DISPLAY_MSG, NO_DISPLAY_USAGE)
		return nil, nil, werr
	}

	p := new(Package)
	resp, err := s.client.Do(req, &p, ExitWithSuccessOnTimeout)
	if err != nil {
		Debug(DbgError, "s.client.Do() error - HTTP req %s; error: '%s'\n", req.URL.String(), err)
		return nil, resp, err
	}

	return p, resp, nil

}

func (s *PackageService) Insert(x_package PackageInterface, overwrite bool) (*Package, *http.Response, error) {
	// Encode resource name as a path (with no query params) before inserting it into the URI
	// This way any '?' chars in the name won't be treated as the beginning of the query params
	packageName := (&url.URL{Path: x_package.GetName()}).String()
	route := fmt.Sprintf("packages/%s?overwrite=%t", packageName, overwrite)

	req, err := s.client.NewRequest("PUT", route, x_package, IncludeNamespaceInUrl)
	if err != nil {
		Debug(DbgError, "http.NewRequest(PUT, %s); error: '%s'\n", route, err)
		errStr := wski18n.T("Unable to create PUT HTTP request for '{{.route}}': {{.err}}",
			map[string]interface{}{"route": route, "err": err})
		werr := MakeWskErrorFromWskError(errors.New(errStr), err, EXIT_CODE_ERR_GENERAL, DISPLAY_MSG, NO_DISPLAY_USAGE)
		return nil, nil, werr
	}

	p := new(Package)
	resp, err := s.client.Do(req, &p, ExitWithSuccessOnTimeout)
	if err != nil {
		Debug(DbgError, "s.client.Do() error - HTTP req %s; error: '%s'\n", req.URL.String(), err)
		return nil, resp, err
	}

	return p, resp, nil
}

func (s *PackageService) Delete(packageName string) (*http.Response, error) {
	// Encode resource name as a path (with no query params) before inserting it into the URI
	// This way any '?' chars in the name won't be treated as the beginning of the query params
	packageName = (&url.URL{Path: packageName}).String()
	route := fmt.Sprintf("packages/%s", packageName)

	req, err := s.client.NewRequest("DELETE", route, nil, IncludeNamespaceInUrl)
	if err != nil {
		Debug(DbgError, "http.NewRequest(DELETE, %s); error: '%s'\n", route, err)
		errStr := wski18n.T("Unable to create DELETE HTTP request for '{{.route}}': {{.err}}",
			map[string]interface{}{"route": route, "err": err})
		werr := MakeWskErrorFromWskError(errors.New(errStr), err, EXIT_CODE_ERR_GENERAL, DISPLAY_MSG, NO_DISPLAY_USAGE)
		return nil, werr
	}

	resp, err := s.client.Do(req, nil, ExitWithSuccessOnTimeout)
	if err != nil {
		Debug(DbgError, "s.client.Do() error - HTTP req %s; error: '%s'\n", req.URL.String(), err)
		return resp, err
	}

	return resp, nil
}

func (s *PackageService) Refresh() (*BindingUpdates, *http.Response, error) {
	route := "packages/refresh"

	req, err := s.client.NewRequest("POST", route, nil, IncludeNamespaceInUrl)
	if err != nil {
		Debug(DbgError, "http.NewRequest(POST, %s); error: '%s'\n", route, err)
		errStr := wski18n.T("Unable to create POST HTTP request for '{{.route}}': {{.err}}",
			map[string]interface{}{"route": route, "err": err})
		werr := MakeWskErrorFromWskError(errors.New(errStr), err, EXIT_CODE_ERR_GENERAL, DISPLAY_MSG, NO_DISPLAY_USAGE)
		return nil, nil, werr
	}

	updates := &BindingUpdates{}
	resp, err := s.client.Do(req, updates, ExitWithSuccessOnTimeout)
	if err != nil {
		Debug(DbgError, "s.client.Do() error - HTTP req %s; error: '%s'\n", req.URL.String(), err)
		return nil, resp, err
	}

	return updates, resp, nil
}