//
// 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"
)

// GroupIssueBoardsService handles communication with the group issue board
// related methods of the GitLab API.
//
// GitLab API docs:
// https://docs.gitlab.com/ce/api/group_boards.html
type GroupIssueBoardsService struct {
	client *Client
}

// GroupIssueBoard represents a GitLab group issue board.
//
// GitLab API docs:
// https://docs.gitlab.com/ce/api/group_boards.html
type GroupIssueBoard struct {
	ID        int          `json:"id"`
	Name      string       `json:"name"`
	Group     *Group       `json:"group"`
	Milestone *Milestone   `json:"milestone"`
	Lists     []*BoardList `json:"lists"`
}

func (b GroupIssueBoard) String() string {
	return Stringify(b)
}

// ListGroupIssueBoardsOptions represents the available
// ListGroupIssueBoards() options.
//
// GitLab API docs:
// https://docs.gitlab.com/ce/api/group_boards.html#group-board
type ListGroupIssueBoardsOptions ListOptions

// ListGroupIssueBoards gets a list of all issue boards in a group.
//
// GitLab API docs:
// https://docs.gitlab.com/ce/api/group_boards.html#group-board
func (s *GroupIssueBoardsService) ListGroupIssueBoards(gid interface{}, opt *ListGroupIssueBoardsOptions, options ...RequestOptionFunc) ([]*GroupIssueBoard, *Response, error) {
	group, err := parseID(gid)
	if err != nil {
		return nil, nil, err
	}
	u := fmt.Sprintf("groups/%s/boards", PathEscape(group))

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

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

	return gs, resp, err
}

// CreateGroupIssueBoardOptions represents the available
// CreateGroupIssueBoard() options.
//
// GitLab API docs:
// https://docs.gitlab.com/ce/api/group_boards.html#create-a-group-issue-board-premium
type CreateGroupIssueBoardOptions struct {
	Name *string `url:"name" json:"name"`
}

// CreateGroupIssueBoard creates a new issue board.
//
// GitLab API docs:
// https://docs.gitlab.com/ce/api/group_boards.html#create-a-group-issue-board-premium
func (s *GroupIssueBoardsService) CreateGroupIssueBoard(gid interface{}, opt *CreateGroupIssueBoardOptions, options ...RequestOptionFunc) (*GroupIssueBoard, *Response, error) {
	group, err := parseID(gid)
	if err != nil {
		return nil, nil, err
	}
	u := fmt.Sprintf("groups/%s/boards", PathEscape(group))

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

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

	return gib, resp, err
}

// GetGroupIssueBoard gets a single issue board of a group.
//
// GitLab API docs:
// https://docs.gitlab.com/ce/api/group_boards.html#single-board
func (s *GroupIssueBoardsService) GetGroupIssueBoard(gid interface{}, board int, options ...RequestOptionFunc) (*GroupIssueBoard, *Response, error) {
	group, err := parseID(gid)
	if err != nil {
		return nil, nil, err
	}
	u := fmt.Sprintf("groups/%s/boards/%d", PathEscape(group), board)

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

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

	return gib, resp, err
}

// UpdateGroupIssueBoardOptions represents a group issue board.
//
// GitLab API docs:
// https://docs.gitlab.com/ce/api/group_boards.html#update-a-group-issue-board-premium
type UpdateGroupIssueBoardOptions struct {
	Name        *string `url:"name,omitempty" json:"name,omitempty"`
	AssigneeID  *int    `url:"assignee_id,omitempty" json:"assignee_id,omitempty"`
	MilestoneID *int    `url:"milestone_id,omitempty" json:"milestone_id,omitempty"`
	Labels      *Labels `url:"labels,omitempty" json:"labels,omitempty"`
	Weight      *int    `url:"weight,omitempty" json:"weight,omitempty"`
}

// UpdateIssueBoard updates a single issue board of a group.
//
// GitLab API docs:
// https://docs.gitlab.com/ce/api/group_boards.html#update-a-group-issue-board-premium
func (s *GroupIssueBoardsService) UpdateIssueBoard(gid interface{}, board int, opt *UpdateGroupIssueBoardOptions, options ...RequestOptionFunc) (*GroupIssueBoard, *Response, error) {
	group, err := parseID(gid)
	if err != nil {
		return nil, nil, err
	}
	u := fmt.Sprintf("groups/%s/boards/%d", PathEscape(group), board)

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

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

	return gib, resp, err
}

// DeleteIssueBoard delete a single issue board of a group.
//
// GitLab API docs:
// https://docs.gitlab.com/ce/api/group_boards.html#delete-a-group-issue-board-premium
func (s *GroupIssueBoardsService) DeleteIssueBoard(gid interface{}, board int, options ...RequestOptionFunc) (*Response, error) {
	group, err := parseID(gid)
	if err != nil {
		return nil, err
	}
	u := fmt.Sprintf("groups/%s/boards/%d", PathEscape(group), board)

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

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

// ListGroupIssueBoardListsOptions represents the available
// ListGroupIssueBoardLists() options.
//
// GitLab API docs:
// https://docs.gitlab.com/ce/api/group_boards.html#list-board-lists
type ListGroupIssueBoardListsOptions ListOptions

// ListGroupIssueBoardLists gets a list of the issue board's lists. Does not include
// backlog and closed lists.
//
// GitLab API docs: https://docs.gitlab.com/ce/api/group_boards.html#list-board-lists
func (s *GroupIssueBoardsService) ListGroupIssueBoardLists(gid interface{}, board int, opt *ListGroupIssueBoardListsOptions, options ...RequestOptionFunc) ([]*BoardList, *Response, error) {
	group, err := parseID(gid)
	if err != nil {
		return nil, nil, err
	}
	u := fmt.Sprintf("groups/%s/boards/%d/lists", PathEscape(group), board)

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

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

	return gbl, resp, err
}

// GetGroupIssueBoardList gets a single issue board list.
//
// GitLab API docs:
// https://docs.gitlab.com/ce/api/group_boards.html#single-board-list
func (s *GroupIssueBoardsService) GetGroupIssueBoardList(gid interface{}, board, list int, options ...RequestOptionFunc) (*BoardList, *Response, error) {
	group, err := parseID(gid)
	if err != nil {
		return nil, nil, err
	}
	u := fmt.Sprintf("groups/%s/boards/%d/lists/%d",
		PathEscape(group),
		board,
		list,
	)

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

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

	return gbl, resp, err
}

// CreateGroupIssueBoardListOptions represents the available
// CreateGroupIssueBoardList() options.
//
// GitLab API docs:
// https://docs.gitlab.com/ce/api/group_boards.html#new-board-list
type CreateGroupIssueBoardListOptions struct {
	LabelID *int `url:"label_id" json:"label_id"`
}

// CreateGroupIssueBoardList creates a new issue board list.
//
// GitLab API docs:
// https://docs.gitlab.com/ce/api/group_boards.html#new-board-list
func (s *GroupIssueBoardsService) CreateGroupIssueBoardList(gid interface{}, board int, opt *CreateGroupIssueBoardListOptions, options ...RequestOptionFunc) (*BoardList, *Response, error) {
	group, err := parseID(gid)
	if err != nil {
		return nil, nil, err
	}
	u := fmt.Sprintf("groups/%s/boards/%d/lists", PathEscape(group), board)

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

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

	return gbl, resp, err
}

// UpdateGroupIssueBoardListOptions represents the available
// UpdateGroupIssueBoardList() options.
//
// GitLab API docs:
// https://docs.gitlab.com/ce/api/group_boards.html#edit-board-list
type UpdateGroupIssueBoardListOptions struct {
	Position *int `url:"position" json:"position"`
}

// UpdateIssueBoardList updates the position of an existing
// group issue board list.
//
// GitLab API docs:
// https://docs.gitlab.com/ce/api/group_boards.html#edit-board-list
func (s *GroupIssueBoardsService) UpdateIssueBoardList(gid interface{}, board, list int, opt *UpdateGroupIssueBoardListOptions, options ...RequestOptionFunc) ([]*BoardList, *Response, error) {
	group, err := parseID(gid)
	if err != nil {
		return nil, nil, err
	}
	u := fmt.Sprintf("groups/%s/boards/%d/lists/%d",
		PathEscape(group),
		board,
		list,
	)

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

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

	return gbl, resp, err
}

// DeleteGroupIssueBoardList soft deletes a group issue board list.
// Only for admins and group owners.
//
// GitLab API docs:
// https://docs.gitlab.com/ce/api/group_boards.html#delete-a-board-list
func (s *GroupIssueBoardsService) DeleteGroupIssueBoardList(gid interface{}, board, list int, options ...RequestOptionFunc) (*Response, error) {
	group, err := parseID(gid)
	if err != nil {
		return nil, err
	}
	u := fmt.Sprintf("groups/%s/boards/%d/lists/%d",
		PathEscape(group),
		board,
		list,
	)

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

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