package gitlab

import (
	"fmt"
	"strings"
	"time"

	"github.com/go-git/go-git/v5"
	"github.com/pterm/pterm"
	"github.com/xanzy/go-gitlab"
)

// Will determine number of total projects,
// then based on projectsPerPage (request) and
// projectsPerGoroutine, will spin off goroutines
// with offsets
const (
	projectsPerPage      = 20
	projectsPerGoroutine = 200
)

type Project struct {
	ID                int
	Description       string
	SSHURLToRepo      string
	HTTPURLToRepo     string
	WebURL            string
	Name              string
	NameWithNamespace string
	Path              string
	PathWithNamespace string
	AvatarURL         string
	LastActivityAt    time.Time
	Readme            string
	Remote            string
	Owner             string
	Languages         *ProjectLanguages
	gitRepo           *git.Repository
}

type ProjectLanguages []*ProjectLanguage

type ProjectLanguage struct {
	Name       string
	Percentage float32
}

type User struct {
	ID        int
	Username  string
	Email     string
	Name      string
	AvatarURL string
}

func (c *Client) Api() *gitlab.Client {
	return c.apiClient
}

func (p *Project) String() string {
	var projectString string
	if p != nil {
		projectString = fmt.Sprintf("%s (%s)", p.Path, p.PathWithNamespace)
	}
	return projectString
}

func (p *Project) GetLanguage() *ProjectLanguage {
	if p.Languages == nil {
		return nil
	}

	var lang *ProjectLanguage
	var maxPcnt float32
	for _, p := range *p.Languages {
		if p.Percentage > maxPcnt {
			lang = p
		}
		maxPcnt = p.Percentage
	}

	return lang
}

func (p *Project) SanitizedPath() string {
	return strings.Trim(p.PathWithNamespace, " '\"%<>|`")
}

func (p *Project) SetRepo(r *git.Repository) {
	p.gitRepo = r
}

func (p *Project) GetRepo() *git.Repository {
	return p.gitRepo
}

func (c *Client) GetTotalProjects(opts *gitlab.ListProjectsOptions) int {
	reqOpts := *opts
	reqOpts.ListOptions = gitlab.ListOptions{
		Page:    1,
		PerPage: 1,
	}

	var projects int
	if _, r, e := c.apiClient.Projects.ListProjects(opts, gitlab.WithContext(c.Ctx)); e == nil {
		projects = r.TotalItems
	}

	return projects
}

// Returns a list of projects along with the next page and an error
// if there was an error
func (c *Client) ListProjects(opts *gitlab.ListProjectsOptions) (
	[]*Project, *gitlab.Response, error) {
	pList := make([]*Project, 0)
	projects, resp, err := c.apiClient.Projects.ListProjects(
		opts,
		gitlab.WithContext(c.Ctx),
	)
	if err == nil {
		pList = append(pList, c.handleProjects(projects)...)
	}
	return pList, resp, err
}

// A nil return indicates an API error or GitLab doesn't know what
// language the project uses.
func (c *Client) GetProjectLanguages(project *gitlab.Project) *ProjectLanguages {
	l, _, e := c.apiClient.Projects.GetProjectLanguages(project.ID, gitlab.WithContext(c.Ctx))
	if e != nil {
		pterm.Error.Printfln("Failed requesting project languages: %s", e.Error())
		return nil
	}

	var pLangs ProjectLanguages
	pLangs = make([]*ProjectLanguage, len(*l))

	var i int
	for name, pcnt := range *l {
		pLangs[i] = &ProjectLanguage{
			Name:       name,
			Percentage: pcnt,
		}
		i++
	}

	return &pLangs
}