package handlers

import (
	"context"
	"fmt"
	"time"

	"github.com/orchard9/rdev/internal/domain"
	"github.com/orchard9/rdev/internal/logging"
	"github.com/orchard9/rdev/internal/service"
)

// startWebUI launches claude-code-ui as a background process in the session pod.
// This is fire-and-forget — UI startup failure does not block session creation.
func (h *SessionsHandler) startWebUI(ctx context.Context, session *domain.Session) {
	log := logging.FromContext(ctx).WithService("SessionsHandler")

	bgCtx := context.WithoutCancel(ctx)
	go func() {
		startCtx, cancel := context.WithTimeout(bgCtx, TimeoutStandard)
		defer cancel()

		cmd := &domain.Command{
			ID:        domain.CommandID(fmt.Sprintf("webui-%s", session.ID)),
			ProjectID: session.ProjectID,
			Type:      domain.CommandTypeShell,
			Args:      []string{fmt.Sprintf("nohup claude-code-ui --port %d > /tmp/claude-code-ui.log 2>&1 &", service.WebUIPort)},
			StartedAt: time.Now(),
		}

		if _, err := h.executor.Execute(startCtx, cmd, session.PodName, func(_ domain.OutputLine) {}); err != nil {
			log.Error("failed to start claude-code-ui",
				logging.FieldError, err,
				"session_id", session.ID,
				logging.FieldProjectID, session.ProjectID,
			)
		} else {
			log.Info("claude-code-ui started",
				"session_id", session.ID,
				"port", service.WebUIPort,
			)
		}
	}()
}

// stopWebUI kills the claude-code-ui process in the session pod.
// Best-effort — failure is logged but does not block session teardown.
func (h *SessionsHandler) stopWebUI(ctx context.Context, session *domain.Session) {
	log := logging.FromContext(ctx).WithService("SessionsHandler")

	killCtx, cancel := context.WithTimeout(ctx, TimeoutFastLookup)
	defer cancel()

	cmd := &domain.Command{
		ID:        domain.CommandID(fmt.Sprintf("webui-stop-%s", session.ID)),
		ProjectID: session.ProjectID,
		Type:      domain.CommandTypeShell,
		Args:      []string{"pkill -f claude-code-ui || true"},
		StartedAt: time.Now(),
	}

	if _, err := h.executor.Execute(killCtx, cmd, session.PodName, func(_ domain.OutputLine) {}); err != nil {
		log.Warn("failed to stop claude-code-ui",
			logging.FieldError, err,
			"session_id", session.ID,
			logging.FieldProjectID, session.ProjectID,
		)
	}
}