package state

import (
	"os"
	"sync"
)

var testHookOverrideMu sync.Mutex

// TestHookQuarantineCorruptFile runs one orchestration or CLI step.
// Signature: TestHookQuarantineCorruptFile(path string, payload []byte, replacement []byte, mode os.FileMode) error.
// Why: exposes corrupt-file healing internals to the top-level testing module without package-local tests.
func TestHookQuarantineCorruptFile(path string, payload []byte, replacement []byte, mode os.FileMode) error {
	return quarantineCorruptFile(path, payload, replacement, mode)
}

// TestHookWriteIntentDefault runs one orchestration or CLI step.
// Signature: TestHookWriteIntentDefault(path string, in Intent) error.
// Why: lets top-level tests delegate to production WriteIntent behavior while
// selectively forcing deterministic failures for specific branches.
func TestHookWriteIntentDefault(path string, in Intent) error {
	return writeIntentDefault(path, in)
}

// TestHookReadIntentDefault runs one orchestration or CLI step.
// Signature: TestHookReadIntentDefault(path string) (Intent, error).
// Why: lets top-level tests delegate to production ReadIntent behavior while
// selectively forcing deterministic read sequences for lifecycle branches.
func TestHookReadIntentDefault(path string) (Intent, error) {
	return readIntentDefault(path)
}

// TestHookSetReadIntentOverride runs one orchestration or CLI step.
// Signature: TestHookSetReadIntentOverride(fn func(path string) (Intent, error)) (restore func()).
// Why: enables deterministic intent-read failure injection without sleeping
// goroutines that race slower CI agents.
func TestHookSetReadIntentOverride(fn func(path string) (Intent, error)) (restore func()) {
	testHookOverrideMu.Lock()
	prev := readIntentImpl
	if fn == nil {
		readIntentImpl = readIntentDefault
	} else {
		readIntentImpl = fn
	}
	testHookOverrideMu.Unlock()
	return func() {
		testHookOverrideMu.Lock()
		readIntentImpl = prev
		testHookOverrideMu.Unlock()
	}
}

// TestHookSetWriteIntentOverride runs one orchestration or CLI step.
// Signature: TestHookSetWriteIntentOverride(fn func(path string, in Intent) error) (restore func()).
// Why: enables deterministic intent-write failure injection from the top-level
// testing module when tests run as root.
func TestHookSetWriteIntentOverride(fn func(path string, in Intent) error) (restore func()) {
	testHookOverrideMu.Lock()
	prev := writeIntentImpl
	if fn == nil {
		writeIntentImpl = writeIntentDefault
	} else {
		writeIntentImpl = fn
	}
	testHookOverrideMu.Unlock()
	return func() {
		testHookOverrideMu.Lock()
		writeIntentImpl = prev
		testHookOverrideMu.Unlock()
	}
}

// TestHookQuarantineCorruptFileDefault runs one orchestration or CLI step.
// Signature: TestHookQuarantineCorruptFileDefault(path string, payload []byte, replacement []byte, mode os.FileMode) error.
// Why: lets top-level tests fall through to production quarantine behavior when
// they only want to force a subset of calls.
func TestHookQuarantineCorruptFileDefault(path string, payload []byte, replacement []byte, mode os.FileMode) error {
	return quarantineCorruptFileDefault(path, payload, replacement, mode)
}

// TestHookSetQuarantineCorruptFileOverride runs one orchestration or CLI step.
// Signature: TestHookSetQuarantineCorruptFileOverride(fn func(path string, payload []byte, replacement []byte, mode os.FileMode) error) (restore func()).
// Why: enables deterministic auto-heal failure tests in privileged/root execution.
func TestHookSetQuarantineCorruptFileOverride(fn func(path string, payload []byte, replacement []byte, mode os.FileMode) error) (restore func()) {
	testHookOverrideMu.Lock()
	prev := quarantineCorruptFileImpl
	if fn == nil {
		quarantineCorruptFileImpl = quarantineCorruptFileDefault
	} else {
		quarantineCorruptFileImpl = fn
	}
	testHookOverrideMu.Unlock()
	return func() {
		testHookOverrideMu.Lock()
		quarantineCorruptFileImpl = prev
		testHookOverrideMu.Unlock()
	}
}