package projects

import (
	"bytes"
	"fmt"
	"strings"
	"text/tabwriter"

	"github.com/pterm/pterm"
	"gitlab.sweetwater.com/it/devops/tools/gitlab-project-manager/internal/gitlab"
)

type ProjectAlias struct {
	Alias     string
	ProjectID int
}

func ProjectAliasesString(aliases []*ProjectAlias) string {
	var str string
	for _, a := range aliases {
		str += "[" + pterm.LightCyan(a.Alias) + "] "
	}
	return strings.Trim(str, " ")
}

func (c *Cache) AliasesByProjectString() string {
	var str bytes.Buffer

	w := new(tabwriter.Writer)
	w.Init(&str, 10, 0, 0, ' ', tabwriter.AlignRight)

	for _, p := range c.GetProjectsWithAliases() {
		var pa string
		pa += pterm.LightBlue("- ")
		pa += fmt.Sprint(pterm.Bold.Sprint(p.String()) + " \t ")
		pa += fmt.Sprint(ProjectAliasesString(c.GetProjectAliases(p)))
		fmt.Fprintln(w, pa)
	}

	w.Flush()
	return str.String()
}

func (c *Cache) ProjectString(p *gitlab.Project) string {
	info := strings.Builder{}

	info.WriteString(pterm.LightGreen("\n--------------\n"))
	info.WriteString(pterm.Bold.Sprint(p.Name))
	info.WriteRune('\n')
	if p.Description != "" {
		info.WriteString(p.Description)
		info.WriteRune('\n')
	}

	info.WriteString("\nPath: " + pterm.LightGreen(p.PathWithNamespace))
	info.WriteString("\nProjectID: " + pterm.LightGreen(p.ID))
	info.WriteString("\nURL: " + pterm.LightGreen(p.WebURL))
	info.WriteString("\nLastActivity: " + pterm.LightMagenta(p.LastActivityAt.String()))
	info.WriteString("\nAliases: ")

	aliases := c.GetProjectAliases(p)
	info.WriteString(ProjectAliasesString(aliases))

	info.WriteString(pterm.LightGreen("\n--------------\n"))
	return info.String()
}

func (c *Cache) ProjectStrings(prefix string) []string {
	projects := make([]string, 0, len(c.Projects))
	for _, p := range c.Projects {
		if strings.HasPrefix(p.NameWithNamespace, prefix) {
			projects = append(projects, p.NameWithNamespace)
		}
	}
	return projects
}

func (c *Cache) AliasStrings(prefix string) []string {
	aliases := make([]string, 0, len(c.Aliases))
	for _, a := range c.Aliases {
		if strings.HasPrefix(a.Alias, prefix) {
			aliases = append(aliases, a.Alias)
		}
	}
	return aliases
}

func (c *Cache) GetAliasByName(name string) *ProjectAlias {
	for _, a := range c.Aliases {
		if name == a.Alias {
			return a
		}
	}
	return nil
}

func (c *Cache) GetProjectByPath(path string) *gitlab.Project {
	for _, p := range c.Projects {
		if p.PathWithNamespace == path {
			return p
		}
	}
	return nil
}

func (c *Cache) GetProjectByID(id int) *gitlab.Project {
	for _, p := range c.Projects {
		if p.ID == id {
			return p
		}
	}
	return nil
}

func (c *Cache) GetProjectByAlias(alias *ProjectAlias) *gitlab.Project {
	if alias == nil {
		return nil
	}
	for _, p := range c.Projects {
		if p.ID == alias.ProjectID {
			return p
		}
	}
	return nil
}

func (c *Cache) GetProjectAliases(project *gitlab.Project) []*ProjectAlias {
	aliases := make([]*ProjectAlias, 0)
	for _, alias := range c.Aliases {
		if alias.ProjectID == project.ID {
			aliases = append(aliases, alias)
		}
	}
	return aliases
}

func (c *Cache) LoadProjects() {
	progressInfo := c.gitlab.StreamProjects(c.config.Cache.Load.OwnerOnly)
	c.Projects = make([]*gitlab.Project, 0)

	pBar := pterm.DefaultProgressbar.
		WithShowPercentage(true).
		WithTotal(-1).
		WithTitle("Listing GitLab Projects").
		WithMaxWidth(100)

	defer pBar.Stop()

	var curProjects int
	for {
		select {
		case p := <-progressInfo.ProgressChan:
			if pBar.Total == -1 {
				pBar = pBar.WithTotal(p.TotalProjects)
				pBar, _ = pBar.Start()
			}
			// This sucks, has to be a better way, and why is the logger incompatible
			// with the progressbar?
			pterm.Debug.Println(fmt.Sprintf("Update received: %#v", p))
			pBar.Add(p.Projects - curProjects)
			curProjects = p.Projects
		case p := <-progressInfo.ProjectsChan:
			c.Projects = append(c.Projects, p...)
		case e := <-progressInfo.ErrorChan:
			c.log.Error("Fetch GitLab projects error", c.log.Args("error", e))
		case <-c.gitlab.Ctx.Done():
			c.log.Warn("LoadProjects cancelled", c.log.Args("reason", c.gitlab.Ctx.Err()))
			return
		case <-progressInfo.DoneChan:
			pBar.Add(pBar.Total - curProjects)
			fmt.Println("")
			c.log.Info("Project load complete")
			return
		}
	}
}