package ports

import (
	"context"
	"time"

	"github.com/dtoro/oikos/internal/core/domain"
)

// SignalUpsertInput is the observe-pass signal write: open/resolve
// transitions with their triggers, committed atomically.
type SignalUpsertInput struct {
	Signal   domain.Signal
	Triggers []SignalTrigger
	Audit    []AuditEntry
	Event    *Event
}

// SignalTrigger is an automatic follow-up fired on a signal transition
// (payload firm; shapes firm up with the Phase 5 observation slice).
type SignalTrigger struct {
	Kind       string
	EntityID   domain.UUID
	Parameters map[string]any
}

// SignalTransitionInput acks/resolves/mutes a signal (check-then-act on the
// signal's current state inside the transaction).
type SignalTransitionInput struct {
	SignalID domain.UUID
	Action   string // "ack", "resolve", "mute"
	Note     string
	MuteFor  time.Duration
	Actor    string
	Audit    []AuditEntry
	Event    *Event
}

// SignalRepository is the signal aggregate.
type SignalRepository interface {
	Open(ctx context.Context) ([]domain.Signal, error)
	History(ctx context.Context, entityID domain.UUID, limit int) ([]domain.Signal, error)

	UpsertWithTriggers(ctx context.Context, input SignalUpsertInput) error
	Transition(ctx context.Context, input SignalTransitionInput) (domain.Signal, error)
}

// ExecutionSubmitInput is the queued-execution write: execution row,
// approval (for gated risk classes), audit, and event — one transaction.
type ExecutionSubmitInput struct {
	Execution domain.Execution
	Approval  *domain.Approval
	Audit     []AuditEntry
	Event     *Event
}

// ExecutionCompleteInput closes out an execution: final status, output
// summary, audit, event.
type ExecutionCompleteInput struct {
	ExecutionID domain.UUID
	Status      string
	Output      string
	ExitCode    int
	Audit       []AuditEntry
	Event       *Event
}

// ExecutionRepository is the execution aggregate. Claim uses an advisory
// lock so exactly one worker claims a queued execution.
type ExecutionRepository interface {
	List(ctx context.Context, cursor string, limit int) ([]domain.Execution, error)
	ReadLog(ctx context.Context, executionID domain.UUID) ([]string, error)

	SubmitQueued(ctx context.Context, input ExecutionSubmitInput) (domain.Execution, error)
	Claim(ctx context.Context) (*domain.Execution, error)
	AppendLog(ctx context.Context, executionID domain.UUID, chunk string) error
	Complete(ctx context.Context, input ExecutionCompleteInput) error
}

// ApprovalDecideInput verifies the HMAC token (check-then-act), flips the
// approval, un-gates the execution, and appends audit — one transaction.
// Double-approve must not double-execute.
type ApprovalDecideInput struct {
	ApprovalID domain.UUID
	Token      string
	Approved   bool
	Actor      string
	Audit      []AuditEntry
	Event      *Event
}

// ApprovalRepository is the approval aggregate.
type ApprovalRepository interface {
	ListPending(ctx context.Context, entityID domain.UUID, limit int) ([]domain.Approval, error)

	Decide(ctx context.Context, input ApprovalDecideInput) (domain.Approval, error)
}

// GovernanceStore is the policy read model: the facts the gating decision
// needs that live outside the command text — session plan state, assent/
// destructive windows, duplicate pending executions, and target entity
// attributes. Implemented by the postgres adapter; faked in portstest.
type GovernanceStore interface {
	// SessionHasPlan reports whether the session has any non-replaced plan
	// step (the plan-first gate). Fails open on store errors — a flake
	// must not block otherwise-valid work.
	SessionHasPlan(ctx context.Context, sessionID string) bool
	// AssentWindowActive reports a live operator-assent grant for this
	// agent+session (config_mutation auto-run scope).
	AssentWindowActive(ctx context.Context, agentID domain.UUID, sessionID string) bool
	// DestructiveWindowActive reports a live explicitly-confirmed
	// destructive grant for this agent+target+session.
	DestructiveWindowActive(ctx context.Context, agentID domain.UUID, targetSlug, sessionID string) bool
	// PendingApprovalCount counts this session's executions stuck at
	// pending_approval (the approval-flood gate).
	PendingApprovalCount(ctx context.Context, sessionID string) int
	// PendingDuplicate returns the execution id of an identical command
	// already queued for approval on this target, if any.
	PendingDuplicate(ctx context.Context, targetID domain.UUID, action string) (domain.UUID, bool)
	// EntityAttributes loads one entity's attributes map (VM QEMU-guest-
	// agent state and similar gating inputs).
	EntityAttributes(ctx context.Context, targetID domain.UUID) (map[string]any, error)
}

// CreateRunInput records one `run` submission in the execution ledger:
// the execution entity + row, its graph edges, the classification
// decision, and the audit entry — one transaction. Written before the
// route executes (auto-run or queue), exactly as the pre-service
// classifyAndGate path did.
type CreateRunInput struct {
	ExecutionID    domain.UUID
	TargetID       domain.UUID
	TargetSlug     string
	AgentID        domain.UUID
	SessionID      string
	Command        string
	Purpose        string
	Action         string // "run:{json params}" action column value
	RiskClass      string
	Route          string // "auto-act" | "escalate"
	ClassReasoning []byte
	CorrelationID  string
}

// QueueApprovalInput records the operator-approval ask for a gated
// execution: the approval row, the execution status flip, and the
// session's awaiting_input transition (with its task.status event).
type QueueApprovalInput struct {
	ExecutionID domain.UUID
	TargetID    domain.UUID
	TargetSlug  string
	Action      string
	Params      string
	RiskClass   string
	SessionID   string
}

// FinalizeExecutionInput closes an auto-run execution with full timing.
type FinalizeExecutionInput struct {
	ExecutionID domain.UUID
	Status      string // "completed" | "failed"
	Result      []byte
	StartedAt   time.Time
}

// ExecutionRecorder persists the run-submission lifecycle. The service
// owns ordering and the decision; the adapter owns the SQL (entity row,
// executions row, edges, classifications, approvals, audit, events).
type ExecutionRecorder interface {
	CreateRun(ctx context.Context, input CreateRunInput) error
	MarkRunning(ctx context.Context, executionID domain.UUID) error
	Finalize(ctx context.Context, input FinalizeExecutionInput) error
	QueueApproval(ctx context.Context, input QueueApprovalInput) error
}