// Copyright 2019 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.

package gitea

import (
	"bytes"
	"encoding/json"
	"fmt"
)

// Team represents a team in an organization
type Team struct {
	ID                      int64         `json:"id"`
	Name                    string        `json:"name"`
	Description             string        `json:"description"`
	Organization            *Organization `json:"organization"`
	Permission              AccessMode    `json:"permission"`
	CanCreateOrgRepo        bool          `json:"can_create_org_repo"`
	IncludesAllRepositories bool          `json:"includes_all_repositories"`
	// example: ["repo.code","repo.issues","repo.ext_issues","repo.wiki","repo.pulls","repo.releases","repo.ext_wiki"]
	Units []string `json:"units"`
}

// ListTeamsOptions options for listing teams
type ListTeamsOptions struct {
	ListOptions
}

// ListOrgTeams lists all teams of an organization
func (c *Client) ListOrgTeams(org string, opt ListTeamsOptions) ([]*Team, error) {
	opt.setDefaults()
	teams := make([]*Team, 0, opt.PageSize)
	return teams, c.getParsedResponse("GET", fmt.Sprintf("/orgs/%s/teams?%s", org, opt.getURLQuery().Encode()), nil, nil, &teams)
}

// ListMyTeams lists all the teams of the current user
func (c *Client) ListMyTeams(opt *ListTeamsOptions) ([]*Team, error) {
	opt.setDefaults()
	teams := make([]*Team, 0, opt.PageSize)
	return teams, c.getParsedResponse("GET", fmt.Sprintf("/user/teams?%s", opt.getURLQuery().Encode()), nil, nil, &teams)
}

// GetTeam gets a team by ID
func (c *Client) GetTeam(id int64) (*Team, error) {
	t := new(Team)
	return t, c.getParsedResponse("GET", fmt.Sprintf("/teams/%d", id), nil, nil, t)
}

// CreateTeamOption options for creating a team
type CreateTeamOption struct {
	Name                    string     `json:"name"`
	Description             string     `json:"description"`
	Permission              AccessMode `json:"permission"`
	CanCreateOrgRepo        bool       `json:"can_create_org_repo"`
	IncludesAllRepositories bool       `json:"includes_all_repositories"`
	// example: ["repo.code","repo.issues","repo.ext_issues","repo.wiki","repo.pulls","repo.releases","repo.ext_wiki"]
	Units []string `json:"units"`
}

// Validate the CreateTeamOption struct
func (opt CreateTeamOption) Validate() error {
	if opt.Permission == AccessModeOwner {
		opt.Permission = AccessModeAdmin
	} else if opt.Permission != AccessModeRead && opt.Permission != AccessModeWrite && opt.Permission != AccessModeAdmin {
		return fmt.Errorf("permission mode invalid")
	}
	if len(opt.Name) == 0 {
		return fmt.Errorf("name required")
	}
	if len(opt.Name) > 30 {
		return fmt.Errorf("name to long")
	}
	if len(opt.Description) > 255 {
		return fmt.Errorf("description to long")
	}
	return nil
}

// CreateTeam creates a team for an organization
func (c *Client) CreateTeam(org string, opt CreateTeamOption) (*Team, error) {
	if err := opt.Validate(); err != nil {
		return nil, err
	}
	body, err := json.Marshal(&opt)
	if err != nil {
		return nil, err
	}
	t := new(Team)
	return t, c.getParsedResponse("POST", fmt.Sprintf("/orgs/%s/teams", org), jsonHeader, bytes.NewReader(body), t)
}

// EditTeamOption options for editing a team
type EditTeamOption struct {
	Name                    string     `json:"name"`
	Description             *string    `json:"description"`
	Permission              AccessMode `json:"permission"`
	CanCreateOrgRepo        *bool      `json:"can_create_org_repo"`
	IncludesAllRepositories *bool      `json:"includes_all_repositories"`
	// example: ["repo.code","repo.issues","repo.ext_issues","repo.wiki","repo.pulls","repo.releases","repo.ext_wiki"]
	Units []string `json:"units"`
}

// Validate the EditTeamOption struct
func (opt EditTeamOption) Validate() error {
	if opt.Permission == AccessModeOwner {
		opt.Permission = AccessModeAdmin
	} else if opt.Permission != AccessModeRead && opt.Permission != AccessModeWrite && opt.Permission != AccessModeAdmin {
		return fmt.Errorf("permission mode invalid")
	}
	if len(opt.Name) == 0 {
		return fmt.Errorf("name required")
	}
	if len(opt.Name) > 30 {
		return fmt.Errorf("name to long")
	}
	if opt.Description != nil && len(*opt.Description) > 255 {
		return fmt.Errorf("description to long")
	}
	return nil
}

// EditTeam edits a team of an organization
func (c *Client) EditTeam(id int64, opt EditTeamOption) error {
	if err := opt.Validate(); err != nil {
		return err
	}
	body, err := json.Marshal(&opt)
	if err != nil {
		return err
	}
	_, err = c.getResponse("PATCH", fmt.Sprintf("/teams/%d", id), jsonHeader, bytes.NewReader(body))
	return err
}

// DeleteTeam deletes a team of an organization
func (c *Client) DeleteTeam(id int64) error {
	_, err := c.getResponse("DELETE", fmt.Sprintf("/teams/%d", id), nil, nil)
	return err
}

// ListTeamMembersOptions options for listing team's members
type ListTeamMembersOptions struct {
	ListOptions
}

// ListTeamMembers lists all members of a team
func (c *Client) ListTeamMembers(id int64, opt ListTeamMembersOptions) ([]*User, error) {
	opt.setDefaults()
	members := make([]*User, 0, opt.PageSize)
	return members, c.getParsedResponse("GET", fmt.Sprintf("/teams/%d/members?%s", id, opt.getURLQuery().Encode()), nil, nil, &members)
}

// GetTeamMember gets a member of a team
func (c *Client) GetTeamMember(id int64, user string) (*User, error) {
	m := new(User)
	return m, c.getParsedResponse("GET", fmt.Sprintf("/teams/%d/members/%s", id, user), nil, nil, m)
}

// AddTeamMember adds a member to a team
func (c *Client) AddTeamMember(id int64, user string) error {
	_, err := c.getResponse("PUT", fmt.Sprintf("/teams/%d/members/%s", id, user), nil, nil)
	return err
}

// RemoveTeamMember removes a member from a team
func (c *Client) RemoveTeamMember(id int64, user string) error {
	_, err := c.getResponse("DELETE", fmt.Sprintf("/teams/%d/members/%s", id, user), nil, nil)
	return err
}

// ListTeamRepositoriesOptions options for listing team's repositories
type ListTeamRepositoriesOptions struct {
	ListOptions
}

// ListTeamRepositories lists all repositories of a team
func (c *Client) ListTeamRepositories(id int64, opt ListTeamRepositoriesOptions) ([]*Repository, error) {
	opt.setDefaults()
	repos := make([]*Repository, 0, opt.PageSize)
	return repos, c.getParsedResponse("GET", fmt.Sprintf("/teams/%d/repos?%s", id, opt.getURLQuery().Encode()), nil, nil, &repos)
}

// AddTeamRepository adds a repository to a team
func (c *Client) AddTeamRepository(id int64, org, repo string) error {
	_, err := c.getResponse("PUT", fmt.Sprintf("/teams/%d/repos/%s/%s", id, org, repo), nil, nil)
	return err
}

// RemoveTeamRepository removes a repository from a team
func (c *Client) RemoveTeamRepository(id int64, org, repo string) error {
	_, err := c.getResponse("DELETE", fmt.Sprintf("/teams/%d/repos/%s/%s", id, org, repo), nil, nil)
	return err
}