package domain

import "time"

type ExecuteRequest struct {
	CapabilityID       string            `json:"capability_id"`
	TargetEntityID     string            `json:"target_entity_id"`
	EntityVersion      int64             `json:"entity_version,omitempty"`
	Arguments          map[string]any    `json:"arguments,omitempty"`
	RequestedBy        map[string]string `json:"requested_by,omitempty"`
	Origin             map[string]string `json:"origin,omitempty"`
	IdempotencyKey     string            `json:"idempotency_key,omitempty"`
	CorrelationID      string            `json:"correlation_id,omitempty"`
	CausationID        string            `json:"causation_id,omitempty"`
	ResolutionEvidence []map[string]any  `json:"resolution_evidence,omitempty"`
	ConfirmationID     string            `json:"confirmation_id,omitempty"`
}

type Capability struct {
	ID                   string         `json:"id"`
	Name                 string         `json:"name"`
	Description          string         `json:"description,omitempty"`
	TargetTypes          []string       `json:"target_types"`
	TargetEntityID       string         `json:"target_entity_id,omitempty"`
	Provider             string         `json:"provider"`
	Operation            string         `json:"operation"`
	Risk                 string         `json:"risk,omitempty"`
	ReadOnly             bool           `json:"read_only"`
	ExpectedSideEffects  string         `json:"expected_side_effects,omitempty"`
	RequiresConfirmation bool           `json:"requires_confirmation"`
	Enabled              bool           `json:"enabled"`
	TimeoutSeconds       int            `json:"timeout_seconds,omitempty"`
	Attributes           map[string]any `json:"attributes,omitempty"`
	CreatedAt            time.Time      `json:"created_at"`
	UpdatedAt            time.Time      `json:"updated_at"`
	Version              int64          `json:"version"`
}

// Risk tiers. ECOSYSTEM-SPEC.md §4.1 names read/low/protected/destructive; the
// workspace allowlist additionally uses medium/high, which map onto the same
// two guard decisions below.
const (
	RiskRead        = "read"
	RiskLow         = "low"
	RiskMedium      = "medium"
	RiskProtected   = "protected"
	RiskHigh        = "high"
	RiskDestructive = "destructive"
)

// DefaultCapabilityTimeoutSeconds is the per-capability wall-clock timeout
// applied when a registration does not specify one (ECOSYSTEM-SPEC.md §4.3).
const DefaultCapabilityTimeoutSeconds = 30

// EnabledForRisk reports the server-derived `enabled` value for a risk tier.
// Destructive capabilities are disabled by default and must be turned on
// explicitly out of band (ECOSYSTEM-SPEC.md §4.3). This is never overridable
// by an API caller.
func EnabledForRisk(risk string) bool {
	return risk != RiskDestructive
}

// RequiresConfirmationForRisk reports the server-derived
// `requires_confirmation` value for a risk tier. Only genuinely read-only and
// low-risk tiers skip confirmation; unrecognised tiers fail closed.
func RequiresConfirmationForRisk(risk string) bool {
	switch risk {
	case "", RiskRead, RiskLow:
		return false
	default:
		return true
	}
}

type ExecutionStatus string

const (
	ExecutionStarted   ExecutionStatus = "started"
	ExecutionSucceeded ExecutionStatus = "succeeded"
	ExecutionFailed    ExecutionStatus = "failed"
	// ExecutionUnknown marks a wall-clock timeout: the executor may or may not
	// have completed the side effect. Never retried automatically.
	ExecutionUnknown ExecutionStatus = "unknown"
)

type Execution struct {
	// Seq is the storage-assigned, monotonically increasing insertion
	// sequence. It is the pagination cursor for GET /api/v1/executions and
	// mirrors Event.Sequence on GET /api/v1/changes: pass the last Seq you saw
	// back as `since` and the server returns strictly greater rows. Only
	// populated by list reads; single-execution reads leave it zero.
	Seq                int64             `json:"seq,omitempty"`
	ID                 string            `json:"id"`
	CapabilityID       string            `json:"capability_id"`
	CapabilityVersion  int64             `json:"capability_version,omitempty"`
	TargetEntityID     string            `json:"target_entity_id"`
	EntityVersion      int64             `json:"entity_version,omitempty"`
	Arguments          map[string]any    `json:"arguments,omitempty"`
	RequestedBy        map[string]string `json:"requested_by,omitempty"`
	Origin             map[string]string `json:"origin,omitempty"`
	IdempotencyKey     string            `json:"idempotency_key,omitempty"`
	ConfirmationID     string            `json:"confirmation_id,omitempty"`
	Status             ExecutionStatus   `json:"status"`
	Result             map[string]any    `json:"result,omitempty"`
	Error              string            `json:"error,omitempty"`
	ResolutionEvidence []map[string]any  `json:"resolution_evidence,omitempty"`
	CorrelationID      string            `json:"correlation_id,omitempty"`
	CausationID        string            `json:"causation_id,omitempty"`
	CreatedAt          time.Time         `json:"created_at"`
	UpdatedAt          time.Time         `json:"updated_at"`
}

type HexisEventType string

const (
	EventCapabilityRegistered HexisEventType = "hexis.capability.registered"
	EventExecutionStarted     HexisEventType = "hexis.execution.started"
	EventExecutionSucceeded   HexisEventType = "hexis.execution.succeeded"
	EventExecutionFailed      HexisEventType = "hexis.execution.failed"
	EventExecutionDenied      HexisEventType = "hexis.execution.denied"
)

type Event struct {
	ID            string         `json:"id"`
	Sequence      int64          `json:"sequence"`
	Type          HexisEventType `json:"type"`
	Timestamp     time.Time      `json:"timestamp"`
	Actor         string         `json:"actor,omitempty"`
	CorrelationID string         `json:"correlation_id,omitempty"`
	CausationID   string         `json:"causation_id,omitempty"`
	Payload       map[string]any `json:"payload,omitempty"`
}