//
// Copyright 2021, Patrick Webster
//
// 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/http"
	"net/url"
)

// ProjectVariablesService handles communication with the
// project variables related methods of the GitLab API.
//
// GitLab API docs:
// https://docs.gitlab.com/ee/api/project_level_variables.html
type ProjectVariablesService struct {
	client *Client
}

// ProjectVariable represents a GitLab Project Variable.
//
// GitLab API docs:
// https://docs.gitlab.com/ee/api/project_level_variables.html
type ProjectVariable struct {
	Key              string            `json:"key"`
	Value            string            `json:"value"`
	VariableType     VariableTypeValue `json:"variable_type"`
	Protected        bool              `json:"protected"`
	Masked           bool              `json:"masked"`
	Raw              bool              `json:"raw"`
	EnvironmentScope string            `json:"environment_scope"`
}

func (v ProjectVariable) String() string {
	return Stringify(v)
}

// VariableFilter filters available for project variable related functions
type VariableFilter struct {
	EnvironmentScope string `url:"environment_scope, omitempty" json:"environment_scope,omitempty"`
}

// ListProjectVariablesOptions represents the available options for listing variables
// in a project.
//
// GitLab API docs:
// https://docs.gitlab.com/ee/api/project_level_variables.html#list-project-variables
type ListProjectVariablesOptions ListOptions

// ListVariables gets a list of all variables in a project.
//
// GitLab API docs:
// https://docs.gitlab.com/ee/api/project_level_variables.html#list-project-variables
func (s *ProjectVariablesService) ListVariables(pid interface{}, opt *ListProjectVariablesOptions, options ...RequestOptionFunc) ([]*ProjectVariable, *Response, error) {
	project, err := parseID(pid)
	if err != nil {
		return nil, nil, err
	}
	u := fmt.Sprintf("projects/%s/variables", PathEscape(project))

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

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

	return vs, resp, err
}

// GetProjectVariableOptions represents the available GetVariable()
// options.
//
// GitLab API docs:
// https://docs.gitlab.com/ee/api/project_level_variables.html#get-a-single-variable
type GetProjectVariableOptions struct {
	Filter *VariableFilter `url:"filter,omitempty" json:"filter,omitempty"`
}

// GetVariable gets a variable.
//
// GitLab API docs:
// https://docs.gitlab.com/ee/api/project_level_variables.html#get-a-single-variable
func (s *ProjectVariablesService) GetVariable(pid interface{}, key string, opt *GetProjectVariableOptions, options ...RequestOptionFunc) (*ProjectVariable, *Response, error) {
	project, err := parseID(pid)
	if err != nil {
		return nil, nil, err
	}
	u := fmt.Sprintf("projects/%s/variables/%s", PathEscape(project), url.PathEscape(key))

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

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

	return v, resp, err
}

// CreateProjectVariableOptions represents the available CreateVariable()
// options.
//
// GitLab API docs:
// https://docs.gitlab.com/ee/api/project_level_variables.html#create-a-variable
type CreateProjectVariableOptions struct {
	Key              *string            `url:"key,omitempty" json:"key,omitempty"`
	Value            *string            `url:"value,omitempty" json:"value,omitempty"`
	VariableType     *VariableTypeValue `url:"variable_type,omitempty" json:"variable_type,omitempty"`
	Protected        *bool              `url:"protected,omitempty" json:"protected,omitempty"`
	Masked           *bool              `url:"masked,omitempty" json:"masked,omitempty"`
	Raw              *bool              `url:"raw,omitempty" json:"raw,omitempty"`
	EnvironmentScope *string            `url:"environment_scope,omitempty" json:"environment_scope,omitempty"`
}

// CreateVariable creates a new project variable.
//
// GitLab API docs:
// https://docs.gitlab.com/ee/api/project_level_variables.html#create-a-variable
func (s *ProjectVariablesService) CreateVariable(pid interface{}, opt *CreateProjectVariableOptions, options ...RequestOptionFunc) (*ProjectVariable, *Response, error) {
	project, err := parseID(pid)
	if err != nil {
		return nil, nil, err
	}
	u := fmt.Sprintf("projects/%s/variables", PathEscape(project))

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

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

	return v, resp, err
}

// UpdateProjectVariableOptions represents the available UpdateVariable()
// options.
//
// GitLab API docs:
// https://docs.gitlab.com/ee/api/project_level_variables.html#update-a-variable
type UpdateProjectVariableOptions struct {
	Value            *string            `url:"value,omitempty" json:"value,omitempty"`
	VariableType     *VariableTypeValue `url:"variable_type,omitempty" json:"variable_type,omitempty"`
	Protected        *bool              `url:"protected,omitempty" json:"protected,omitempty"`
	Masked           *bool              `url:"masked,omitempty" json:"masked,omitempty"`
	Raw              *bool              `url:"raw,omitempty" json:"raw,omitempty"`
	EnvironmentScope *string            `url:"environment_scope,omitempty" json:"environment_scope,omitempty"`
	Filter           *VariableFilter    `url:"filter,omitempty" json:"filter,omitempty"`
}

// UpdateVariable updates a project's variable.
//
// GitLab API docs:
// https://docs.gitlab.com/ee/api/project_level_variables.html#update-a-variable
func (s *ProjectVariablesService) UpdateVariable(pid interface{}, key string, opt *UpdateProjectVariableOptions, options ...RequestOptionFunc) (*ProjectVariable, *Response, error) {
	project, err := parseID(pid)
	if err != nil {
		return nil, nil, err
	}
	u := fmt.Sprintf("projects/%s/variables/%s", PathEscape(project), url.PathEscape(key))

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

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

	return v, resp, err
}

// RemoveProjectVariableOptions represents the available RemoveVariable()
// options.
//
// GitLab API docs:
// https://docs.gitlab.com/ee/api/project_level_variables.html#delete-a-variable
type RemoveProjectVariableOptions struct {
	Filter *VariableFilter `url:"filter,omitempty" json:"filter,omitempty"`
}

// RemoveVariable removes a project's variable.
//
// GitLab API docs:
// https://docs.gitlab.com/ee/api/project_level_variables.html#delete-a-variable
func (s *ProjectVariablesService) RemoveVariable(pid interface{}, key string, opt *RemoveProjectVariableOptions, options ...RequestOptionFunc) (*Response, error) {
	project, err := parseID(pid)
	if err != nil {
		return nil, err
	}
	u := fmt.Sprintf("projects/%s/variables/%s", PathEscape(project), url.PathEscape(key))

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

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