package integrations

import (
	"context"
	"time"

	"gitea.dooplex.hu/admin/felhom-controller/internal/stacks"
)

// OnStackStop is called when a stack is stopped.
// Revokes active integrations where this stack is provider or target.
// Keeps enabled=true so OnStackStart can re-apply them later.
func (m *Manager) OnStackStop(_ context.Context, stackName string) {
	m.mu.Lock()
	defer m.mu.Unlock()

	all := m.sett.GetIntegrationsForProvider(stackName)
	targetAll := m.sett.GetIntegrationsForTarget(stackName)
	for k, v := range targetAll {
		all[k] = v
	}

	if m.isDebug() {
		m.logger.Printf("[DEBUG] [integrations] OnStackStop: stack=%s integrationsFound=%d", stackName, len(all))
	}

	for key, state := range all {
		if !state.Enabled || state.Status == "disabled" {
			continue
		}

		provider, target, ok := ParseIntegrationKey(key)
		if !ok {
			continue
		}

		handler, hOk := m.handlers[key]
		if !hOk {
			continue
		}

		ac, err := m.buildApplyContext(provider, target)
		if err != nil {
			m.logger.Printf("[WARN] [integrations] Cannot build context for integration %s revoke: %v", key, err)
			continue
		}

		if m.isDebug() {
			m.logger.Printf("[DEBUG] [integrations] OnStackStop: revoking %s", key)
		}
		if err := handler.Revoke(ac); err != nil {
			m.logger.Printf("[WARN] [integrations] Integration revoke on stop failed for %s: %v", key, err)
		}

		if provider == stackName {
			state.Status = "provider_stopped"
		} else {
			state.Status = "target_unavailable"
		}
		_ = m.sett.SetIntegrationState(key, state)
		m.logger.Printf("[INFO] [integrations] Integration %s suspended (stack %s stopped)", key, stackName)
	}
}

// OnStackStart is called when a stack starts.
// Re-applies integrations that were previously enabled but are not currently active.
// Waits briefly for the stack manager to refresh container state.
func (m *Manager) OnStackStart(_ context.Context, stackName string) {
	if m.isDebug() {
		m.logger.Printf("[DEBUG] [integrations] OnStackStart: stack=%s, waiting 5s for state refresh", stackName)
	}
	// Brief delay so the stack manager's periodic status refresh
	// picks up the new container state (runs every 30s).
	time.Sleep(5 * time.Second)

	m.mu.Lock()
	defer m.mu.Unlock()

	all := m.sett.GetIntegrationsForProvider(stackName)
	targetAll := m.sett.GetIntegrationsForTarget(stackName)
	for k, v := range targetAll {
		all[k] = v
	}

	if m.isDebug() {
		m.logger.Printf("[DEBUG] [integrations] OnStackStart: stack=%s integrationsFound=%d", stackName, len(all))
	}

	for key, state := range all {
		if !state.Enabled || state.Status == "active" {
			continue
		}

		provider, target, ok := ParseIntegrationKey(key)
		if !ok {
			continue
		}

		// Both provider and target must be running (or starting) to re-apply.
		// StateStarting = container running but healthcheck hasn't passed yet — still connectable.
		provStack, pOk := m.stacks.GetStack(provider)
		if !pOk || !provStack.Deployed || !isStackUp(provStack.State) {
			if m.isDebug() {
				m.logger.Printf("[DEBUG] [integrations] OnStackStart: skipping %s — provider %s not up (found=%v deployed=%v state=%v)", key, provider, pOk, pOk && provStack.Deployed, func() stacks.ContainerState { if pOk { return provStack.State }; return "" }())
			}
			continue
		}
		if target != "filebrowser" {
			tgtStack, tOk := m.stacks.GetStack(target)
			if !tOk || !tgtStack.Deployed || !isStackUp(tgtStack.State) {
				if m.isDebug() {
					m.logger.Printf("[DEBUG] [integrations] OnStackStart: skipping %s — target %s not up (found=%v deployed=%v state=%v)", key, target, tOk, tOk && tgtStack.Deployed, func() stacks.ContainerState { if tOk { return tgtStack.State }; return "" }())
				}
				continue
			}
		}

		handler, hOk := m.handlers[key]
		if !hOk {
			continue
		}

		if m.isDebug() {
			m.logger.Printf("[DEBUG] [integrations] OnStackStart: re-applying %s (currentStatus=%s)", key, state.Status)
		}

		ac, err := m.buildApplyContext(provider, target)
		if err != nil {
			m.logger.Printf("[WARN] [integrations] Cannot re-apply integration %s on start: %v", key, err)
			continue
		}

		if err := handler.Apply(ac); err != nil {
			m.logger.Printf("[ERROR] [integrations] Integration re-apply on start failed for %s: %v", key, err)
			state.Status = "error"
			state.LastError = err.Error()
			_ = m.sett.SetIntegrationState(key, state)
			continue
		}

		state.Status = "active"
		state.LastError = ""
		_ = m.sett.SetIntegrationState(key, state)
		m.logger.Printf("[INFO] [integrations] Integration %s re-activated (stack %s started)", key, stackName)
	}
}

// isStackUp returns true if the stack is running or starting (healthcheck pending).
func isStackUp(state stacks.ContainerState) bool {
	return state == stacks.StateRunning || state == stacks.StateStarting
}

// OnStackRemove is called when a stack is removed.
// Permanently revokes and deletes integration state.
func (m *Manager) OnStackRemove(_ context.Context, stackName string) {
	m.mu.Lock()
	defer m.mu.Unlock()

	all := m.sett.GetIntegrationsForProvider(stackName)
	targetAll := m.sett.GetIntegrationsForTarget(stackName)
	for k, v := range targetAll {
		all[k] = v
	}

	if m.isDebug() {
		m.logger.Printf("[DEBUG] [integrations] OnStackRemove: stack=%s integrationsFound=%d", stackName, len(all))
	}

	for key, state := range all {
		provider, target, ok := ParseIntegrationKey(key)
		if !ok {
			continue
		}

		if state.Enabled {
			if m.isDebug() {
				m.logger.Printf("[DEBUG] [integrations] OnStackRemove: revoking enabled integration %s", key)
			}
			handler, hOk := m.handlers[key]
			if hOk {
				ac, _ := m.buildApplyContext(provider, target)
				if ac != nil {
					_ = handler.Revoke(ac)
				}
			}
		}

		_ = m.sett.RemoveIntegrationState(key)
		m.logger.Printf("[INFO] [integrations] Integration %s removed (stack %s removed)", key, stackName)
	}
}
