package emapi

import (
	"context"
	"fmt"
	"net/http"

	"go.infratographer.com/x/gidx"

	"go.equinixmetal.net/infra9-metal-bridge/internal/metal/models"
)

const (
	projectsPath = "/projects"
)

// Projects contains a list of projects.
type Projects []*Project

// ToDetails converts the objects to generic project details.
func (p Projects) ToDetails() []*models.ProjectDetails {
	projects := make([]*models.ProjectDetails, len(p))

	var nextIndex int

	for _, project := range p {
		projects[nextIndex] = project.ToDetails()

		if projects[nextIndex] != nil {
			nextIndex++
		}
	}

	if nextIndex < len(p) {
		return projects[:nextIndex]
	}

	return projects
}

// Project contains project information.
type Project struct {
	client *Client

	HREF         string        `json:"href"`
	ID           string        `json:"id"`
	Name         string        `json:"name"`
	Description  string        `json:"description"`
	Memberships  Memberships   `json:"memberships"`
	Organization *Organization `json:"organization"`
}

// ToDetails converts the project to generic project details.
func (p *Project) ToDetails() *models.ProjectDetails {
	var id string

	if p != nil {
		id = idOrLinkID(p.ID, p.HREF)
	}

	if id == "" {
		return nil
	}

	details := &models.ProjectDetails{
		ID:           id,
		Name:         p.Name,
		Organization: p.Organization.ToDetails(),
	}

	details.Memberships = p.Memberships.ToDetailsWithProjectDetails(details)

	return details
}

// getProjectWithMemberships fetches the provided project with membership information.
func (c *Client) getProjectWithMemberships(ctx context.Context, id string) (*Project, error) {
	var project Project

	_, err := c.DoRequest(ctx, http.MethodGet, projectsPath+"/"+id+"?include=memberships.user", nil, &project)
	if err != nil {
		return nil, fmt.Errorf("error loading organization: %w", err)
	}

	return &project, nil
}

// GetProjectDetails fetchs the provided project id with membership information.
func (c *Client) GetProjectDetails(ctx context.Context, id gidx.PrefixedID) (*models.ProjectDetails, error) {
	project, err := c.getProjectWithMemberships(ctx, id.String()[gidx.PrefixPartLength+1:])
	if err != nil {
		return nil, err
	}

	return project.ToDetails(), nil
}