package brave

import (
	"sync"
	"time"
)

const (
	breakerFailureThreshold = 5
	breakerCooldown         = 2 * time.Minute
)

type breakerState struct {
	mu        sync.Mutex
	failures  int
	openUntil time.Time
}

var globalBreaker breakerState

// BreakerOpen reports whether Brave calls should be skipped due to recent failures.
func BreakerOpen() bool {
	globalBreaker.mu.Lock()
	defer globalBreaker.mu.Unlock()
	return time.Now().Before(globalBreaker.openUntil)
}

func recordBreakerSuccess() {
	globalBreaker.mu.Lock()
	defer globalBreaker.mu.Unlock()
	globalBreaker.failures = 0
	globalBreaker.openUntil = time.Time{}
}

func recordBreakerFailure() {
	globalBreaker.mu.Lock()
	defer globalBreaker.mu.Unlock()
	globalBreaker.failures++
	if globalBreaker.failures >= breakerFailureThreshold {
		globalBreaker.openUntil = time.Now().Add(breakerCooldown)
		globalBreaker.failures = 0
	}
}

// ResetBreakerForTest clears breaker state.
func ResetBreakerForTest() {
	globalBreaker.mu.Lock()
	defer globalBreaker.mu.Unlock()
	globalBreaker.failures = 0
	globalBreaker.openUntil = time.Time{}
}