// Package user owns the "主人" (owner) profile and account whitelist that the
// channel-layer policy engine uses for identity recognition. Per DevDocs/design/11
// §0, owner identification is structural — channel actor metadata matched against
// this whitelist — and is never driven by prompt text or an LLM judgment.
package user

// OwnerAccount is a single channel-fingerprint that belongs to the owner. The
// policy engine matches channel-layer actor metadata (platform + account id)
// against this list.
type OwnerAccount struct {
	Platform  string `yaml:"platform"`
	AccountID string `yaml:"accountId"`
}

// OwnerProfile is the owner's identity record: a display name, the default
// persona bound to the owner, and the per-channel account whitelist. It is the
// source data for owner recognition; it is not injected into the persona's
// prompt as an authority.
type OwnerProfile struct {
	ID             string         `yaml:"id"`
	DisplayName    string         `yaml:"displayName"`
	DefaultPersona string         `yaml:"defaultPersona"`
	Accounts       []OwnerAccount `yaml:"accounts"`
	// IdentityFile is the path to the LLM-visible identity/relationship note
	// (persona knowledge, NOT an access-control authority).
	IdentityFile string `yaml:"identityFile,omitempty"`
	Notes        string `yaml:"notes,omitempty"`
}

// IsOwner reports whether the given (platform, accountID) pair belongs to the
// owner according to the whitelist.
func (p *OwnerProfile) IsOwner(platform, accountID string) bool {
	for _, a := range p.Accounts {
		if a.Platform == platform && a.AccountID == accountID {
			return true
		}
	}
	return false
}

// AccountIdentifiers returns the distinct channel account ids owned by the
// owner, for diagnostics / listing.
func (p *OwnerProfile) AccountIdentifiers() []string {
	seen := make(map[string]struct{}, len(p.Accounts))
	out := make([]string, 0, len(p.Accounts))
	for _, a := range p.Accounts {
		if _, ok := seen[a.Platform+":"+a.AccountID]; ok {
			continue
		}
		seen[a.Platform+":"+a.AccountID] = struct{}{}
		out = append(out, a.Platform+":"+a.AccountID)
	}
	return out
}