//
// Copyright 2017, Sander van Harmelen
//
// Licensed 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 gitlab

import (
	"fmt"
	"net/url"
)

// EnvironmentsService handles communication with the environment related methods
// of the GitLab API.
//
// GitLab API docs: https://docs.gitlab.com/ce/api/environments.html
type EnvironmentsService struct {
	client *Client
}

// Environment represents a GitLab environment.
//
// GitLab API docs: https://docs.gitlab.com/ce/api/environments.html
type Environment struct {
	ID          int    `json:"id"`
	Name        string `json:"name"`
	Slug        string `json:"slug"`
	ExternalURL string `json:"external_url"`
}

func (env Environment) String() string {
	return Stringify(env)
}

// ListEnvironmentsOptions represents the available ListEnvironments() options.
//
// GitLab API docs:
// https://docs.gitlab.com/ee/api/environments.html#list-environments
type ListEnvironmentsOptions ListOptions

// ListEnvironments gets a list of environments from a project, sorted by name
// alphabetically.
//
// GitLab API docs:
// https://docs.gitlab.com/ee/api/environments.html#list-environments
func (s *EnvironmentsService) ListEnvironments(pid interface{}, opts *ListEnvironmentsOptions, options ...OptionFunc) ([]*Environment, *Response, error) {
	project, err := parseID(pid)
	if err != nil {
		return nil, nil, err
	}
	u := fmt.Sprintf("projects/%s/environments", url.QueryEscape(project))

	req, err := s.client.NewRequest("GET", u, opts, options)
	if err != nil {
		return nil, nil, err
	}

	var envs []*Environment
	resp, err := s.client.Do(req, &envs)
	if err != nil {
		return nil, resp, err
	}

	return envs, resp, err
}

// CreateEnvironmentOptions represents the available CreateEnvironment() options.
//
// GitLab API docs:
// https://docs.gitlab.com/ee/api/environments.html#create-a-new-environment
type CreateEnvironmentOptions struct {
	Name        *string `url:"name,omitempty" json:"name,omitempty"`
	ExternalURL *string `url:"external_url,omitempty" json:"external_url,omitempty"`
}

// CreateEnvironment adds a environment to a project. This is an idempotent
// method and can be called multiple times with the same parameters. Createing
// an environment that is already a environment does not affect the
// existing environmentship.
//
// GitLab API docs:
// https://docs.gitlab.com/ee/api/environments.html#create-a-new-environment
func (s *EnvironmentsService) CreateEnvironment(pid interface{}, opt *CreateEnvironmentOptions, options ...OptionFunc) (*Environment, *Response, error) {
	project, err := parseID(pid)
	if err != nil {
		return nil, nil, err
	}
	u := fmt.Sprintf("projects/%s/environments", url.QueryEscape(project))

	req, err := s.client.NewRequest("POST", u, opt, options)
	if err != nil {
		return nil, nil, err
	}

	env := new(Environment)
	resp, err := s.client.Do(req, env)
	if err != nil {
		return nil, resp, err
	}

	return env, resp, err
}

// EditEnvironmentOptions represents the available EditEnvironment() options.
//
// GitLab API docs:
// https://docs.gitlab.com/ee/api/environments.html#edit-an-existing-environment
type EditEnvironmentOptions struct {
	Name        *string `url:"name,omitempty" json:"name,omitempty"`
	ExternalURL *string `url:"external_url,omitempty" json:"external_url,omitempty"`
}

// EditEnvironment updates a project team environment to a specified access level..
//
// GitLab API docs:
// https://docs.gitlab.com/ee/api/environments.html#edit-an-existing-environment
func (s *EnvironmentsService) EditEnvironment(pid interface{}, environment int, opt *EditEnvironmentOptions, options ...OptionFunc) (*Environment, *Response, error) {
	project, err := parseID(pid)
	if err != nil {
		return nil, nil, err
	}
	u := fmt.Sprintf("projects/%s/environments/%d", url.QueryEscape(project), environment)

	req, err := s.client.NewRequest("PUT", u, opt, options)
	if err != nil {
		return nil, nil, err
	}

	env := new(Environment)
	resp, err := s.client.Do(req, env)
	if err != nil {
		return nil, resp, err
	}

	return env, resp, err
}

// DeleteEnvironment removes a environment from a project team.
//
// GitLab API docs:
// https://docs.gitlab.com/ce/api/environments.html#remove-a-environment-from-a-group-or-project
func (s *EnvironmentsService) DeleteEnvironment(pid interface{}, environment int, options ...OptionFunc) (*Response, error) {
	project, err := parseID(pid)
	if err != nil {
		return nil, err
	}
	u := fmt.Sprintf("projects/%s/environments/%d", url.QueryEscape(project), environment)

	req, err := s.client.NewRequest("DELETE", u, nil, options)
	if err != nil {
		return nil, err
	}

	return s.client.Do(req, nil)
}