//
// Copyright 2022, Ryan Glab <ryan.j.glab@gmail.com>
//
// 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"
	"time"
)

// PersonalAccessTokensService handles communication with the personal access
// tokens related methods of the GitLab API.
//
// GitLab API docs: https://docs.gitlab.com/ee/api/personal_access_tokens.html
type PersonalAccessTokensService struct {
	client *Client
}

// PersonalAccessToken represents a personal access token.
//
// GitLab API docs: https://docs.gitlab.com/ee/api/personal_access_tokens.html
type PersonalAccessToken struct {
	ID         int        `json:"id"`
	Name       string     `json:"name"`
	Revoked    bool       `json:"revoked"`
	CreatedAt  *time.Time `json:"created_at"`
	Scopes     []string   `json:"scopes"`
	UserID     int        `json:"user_id"`
	LastUsedAt *time.Time `json:"last_used_at,omitempty"`
	Active     bool       `json:"active"`
	ExpiresAt  *ISOTime   `json:"expires_at"`
	Token      string     `json:"token,omitempty"`
}

func (p PersonalAccessToken) String() string {
	return Stringify(p)
}

// ListPersonalAccessTokensOptions represents the available
// ListPersonalAccessTokens() options.
//
// GitLab API docs:
// https://docs.gitlab.com/ee/api/personal_access_tokens.html#list-personal-access-tokens
type ListPersonalAccessTokensOptions struct {
	ListOptions
	UserID *int `url:"user_id,omitempty" json:"user_id,omitempty"`
}

// ListPersonalAccessTokens gets a list of all personal access tokens.
//
// GitLab API docs:
// https://docs.gitlab.com/ee/api/personal_access_tokens.html#list-personal-access-tokens
func (s *PersonalAccessTokensService) ListPersonalAccessTokens(opt *ListPersonalAccessTokensOptions, options ...RequestOptionFunc) ([]*PersonalAccessToken, *Response, error) {
	req, err := s.client.NewRequest(http.MethodGet, "personal_access_tokens", opt, options)
	if err != nil {
		return nil, nil, err
	}

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

	return pats, resp, nil
}

// GetSinglePersonalAccessTokenByID get a single personal access token by its ID.
//
// GitLab API docs:
// https://docs.gitlab.com/ee/api/personal_access_tokens.html#using-a-personal-access-token-id
func (s *PersonalAccessTokensService) GetSinglePersonalAccessTokenByID(user int, options ...RequestOptionFunc) (*PersonalAccessToken, *Response, error) {
	u := fmt.Sprintf("personal_access_tokens/%d", user)
	req, err := s.client.NewRequest(http.MethodGet, u, nil, options)
	if err != nil {
		return nil, nil, err
	}

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

	return pat, resp, nil
}

// GetSinglePersonalAccessToken get a single personal access token by using
// passing the token in a header.
//
// GitLab API docs:
// https://docs.gitlab.com/ee/api/personal_access_tokens.html#using-a-request-header
func (s *PersonalAccessTokensService) GetSinglePersonalAccessToken(options ...RequestOptionFunc) (*PersonalAccessToken, *Response, error) {
	u := "personal_access_tokens/self"
	req, err := s.client.NewRequest(http.MethodGet, u, nil, options)
	if err != nil {
		return nil, nil, err
	}

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

	return pat, resp, nil
}

// RotatePersonalAccessTokenOptions represents the available RotatePersonalAccessToken()
// options.
//
// GitLab API docs:
// https://docs.gitlab.com/ee/api/personal_access_tokens.html#rotate-a-personal-access-token
type RotatePersonalAccessTokenOptions struct {
	ExpiresAt *ISOTime `url:"expires_at,omitempty" json:"expires_at,omitempty"`
}

// RotatePersonalAccessToken revokes a token and returns a new token that
// expires in one week per default.
//
// GitLab API docs:
// https://docs.gitlab.com/ee/api/personal_access_tokens.html#rotate-a-personal-access-token
func (s *PersonalAccessTokensService) RotatePersonalAccessToken(token int, opt *RotatePersonalAccessTokenOptions, options ...RequestOptionFunc) (*PersonalAccessToken, *Response, error) {
	u := fmt.Sprintf("personal_access_tokens/%d/rotate", token)

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

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

	return pat, resp, nil
}

// RevokePersonalAccessToken revokes a personal access token.
//
// GitLab API docs:
// https://docs.gitlab.com/ee/api/personal_access_tokens.html#revoke-a-personal-access-token
func (s *PersonalAccessTokensService) RevokePersonalAccessToken(token int, options ...RequestOptionFunc) (*Response, error) {
	u := fmt.Sprintf("personal_access_tokens/%d", token)

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

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