// Package domain contains pure domain models with no external dependencies.
package domain

import "time"

// CheckoutID is a strongly-typed identifier for checkouts.
type CheckoutID string

// CheckoutStatus represents the state of a checkout.
type CheckoutStatus string

const (
	// CheckoutStatusActive indicates the checkout is currently in use.
	CheckoutStatusActive CheckoutStatus = "active"

	// CheckoutStatusCheckedIn indicates the checkout was completed via checkin.
	CheckoutStatusCheckedIn CheckoutStatus = "checked_in"

	// CheckoutStatusExpired indicates the checkout token expired.
	CheckoutStatusExpired CheckoutStatus = "expired"

	// CheckoutStatusRevoked indicates the checkout was manually revoked.
	CheckoutStatusRevoked CheckoutStatus = "revoked"
)

// IsTerminal returns true if the status is a final state.
func (s CheckoutStatus) IsTerminal() bool {
	return s == CheckoutStatusCheckedIn || s == CheckoutStatusExpired || s == CheckoutStatusRevoked
}

// Checkout represents a checked-out development session.
// A checkout grants temporary git access via an HTTPS token for local development.
type Checkout struct {
	// ID is the unique checkout identifier.
	ID CheckoutID

	// ProjectID is the project being checked out.
	ProjectID ProjectID

	// Branch is the git branch being worked on.
	Branch string

	// FeatureSlug is the optional SDLC feature link.
	FeatureSlug string

	// GiteaTokenID is the Gitea access token ID (for revocation).
	GiteaTokenID int64

	// GiteaTokenName is the name of the Gitea access token.
	GiteaTokenName string

	// CloneURL is the base HTTPS clone URL (without token).
	// Format: https://git.threesix.ai/owner/repo.git
	// The authenticated URL with token is only returned once at checkout creation.
	CloneURL string

	// CheckedOutBy is the user or API key that created the checkout.
	CheckedOutBy string

	// CheckedOutAt is when the checkout was created.
	CheckedOutAt time.Time

	// ExpiresAt is when the checkout token expires.
	ExpiresAt time.Time

	// Status is the current state of the checkout.
	Status CheckoutStatus

	// CheckedInAt is when the checkout was completed (if checked in).
	CheckedInAt *time.Time

	// ReviewTaskID is the work task ID for the review (if review was triggered).
	ReviewTaskID string
}

// IsActive returns true if the checkout can still be used.
func (c *Checkout) IsActive() bool {
	return c.Status == CheckoutStatusActive && time.Now().Before(c.ExpiresAt)
}

// IsExpired returns true if the checkout has expired.
func (c *Checkout) IsExpired() bool {
	return c.Status == CheckoutStatusActive && time.Now().After(c.ExpiresAt)
}

// GitBranch represents a git branch in a repository.
type GitBranch struct {
	// Name is the branch name.
	Name string

	// CommitSHA is the latest commit on the branch.
	CommitSHA string

	// Protected indicates if the branch has protection rules.
	Protected bool
}

// GitAccessToken represents a temporary git access token.
type GitAccessToken struct {
	// ID is the token ID (for revocation).
	ID int64

	// Name is a human-readable name for the token.
	Name string

	// Token is the actual token value (only available on creation).
	Token string

	// Scopes are the permissions granted to the token.
	Scopes []string

	// ExpiresAt is when the token expires.
	ExpiresAt *time.Time
}

// CheckoutListOptions provides filtering options for listing checkouts.
type CheckoutListOptions struct {
	// Status filters by checkout status (nil = all statuses).
	Status *CheckoutStatus

	// Limit is the maximum number of results.
	Limit int

	// Offset is the number of results to skip.
	Offset int
}