feat: Expand group-level defaults with more monitor options

Add support for setting these options at group level:
- hide_ssl_days, hide_ping, round_response_time, round_uptime
- method, user_agent, headers, expected_status

This allows configuring common settings once per group instead of
repeating them on every monitor.

1 files changed, 56 insertions, 13 deletions

diff --git a/internal/config/config.go b/internal/config/config.go
index 0d9329d..5c485d9 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -68,12 +68,20 @@ type GroupConfig struct {
 
 // MonitorDefaults contains default values that can be set at group level
 type MonitorDefaults struct {
-	Interval             *Duration `yaml:"interval,omitempty"`
-	Timeout              *Duration `yaml:"timeout,omitempty"`
-	Retries              *int      `yaml:"retries,omitempty"`
-	VerifySSL            *bool     `yaml:"verify_ssl,omitempty"`
-	DisablePingTooltips  *bool     `yaml:"disable_ping_tooltips,omitempty"`
-	DisableUptimeTooltip *bool     `yaml:"disable_uptime_tooltip,omitempty"`
+	Interval             *Duration         `yaml:"interval,omitempty"`
+	Timeout              *Duration         `yaml:"timeout,omitempty"`
+	Retries              *int              `yaml:"retries,omitempty"`
+	VerifySSL            *bool             `yaml:"verify_ssl,omitempty"`
+	HideSSLDays          *bool             `yaml:"hide_ssl_days,omitempty"`
+	HidePing             *bool             `yaml:"hide_ping,omitempty"`
+	RoundResponseTime    *bool             `yaml:"round_response_time,omitempty"`
+	RoundUptime          *bool             `yaml:"round_uptime,omitempty"`
+	DisablePingTooltips  *bool             `yaml:"disable_ping_tooltips,omitempty"`
+	DisableUptimeTooltip *bool             `yaml:"disable_uptime_tooltip,omitempty"`
+	Method               string            `yaml:"method,omitempty"`
+	UserAgent            string            `yaml:"user_agent,omitempty"`
+	Headers              map[string]string `yaml:"headers,omitempty"`
+	ExpectedStatus       *int              `yaml:"expected_status,omitempty"`
 }
 
 // MonitorConfig represents a single monitor
@@ -287,13 +295,48 @@ func (c *Config) applyDefaults() {
 					}
 				}
 			}
-			// Apply group-level disable_ping_tooltips default
-			if !m.DisablePingTooltips && grp.Defaults != nil && grp.Defaults.DisablePingTooltips != nil && *grp.Defaults.DisablePingTooltips {
-				m.DisablePingTooltips = true
-			}
-			// Apply group-level disable_uptime_tooltip default
-			if !m.DisableUptimeTooltip && grp.Defaults != nil && grp.Defaults.DisableUptimeTooltip != nil && *grp.Defaults.DisableUptimeTooltip {
-				m.DisableUptimeTooltip = true
+			// Apply group-level boolean defaults (only if not explicitly set on monitor)
+			if grp.Defaults != nil {
+				if !m.HideSSLDays && grp.Defaults.HideSSLDays != nil && *grp.Defaults.HideSSLDays {
+					m.HideSSLDays = true
+				}
+				if !m.HidePing && grp.Defaults.HidePing != nil && *grp.Defaults.HidePing {
+					m.HidePing = true
+				}
+				if !m.RoundResponseTime && grp.Defaults.RoundResponseTime != nil && *grp.Defaults.RoundResponseTime {
+					m.RoundResponseTime = true
+				}
+				if !m.RoundUptime && grp.Defaults.RoundUptime != nil && *grp.Defaults.RoundUptime {
+					m.RoundUptime = true
+				}
+				if !m.DisablePingTooltips && grp.Defaults.DisablePingTooltips != nil && *grp.Defaults.DisablePingTooltips {
+					m.DisablePingTooltips = true
+				}
+				if !m.DisableUptimeTooltip && grp.Defaults.DisableUptimeTooltip != nil && *grp.Defaults.DisableUptimeTooltip {
+					m.DisableUptimeTooltip = true
+				}
+				// Apply string defaults (only if not set on monitor)
+				if m.Method == "" && grp.Defaults.Method != "" {
+					m.Method = grp.Defaults.Method
+				}
+				if m.UserAgent == "" && grp.Defaults.UserAgent != "" {
+					m.UserAgent = grp.Defaults.UserAgent
+				}
+				// Apply headers (merge, monitor headers take precedence)
+				if len(grp.Defaults.Headers) > 0 {
+					if m.Headers == nil {
+						m.Headers = make(map[string]string)
+					}
+					for k, v := range grp.Defaults.Headers {
+						if _, exists := m.Headers[k]; !exists {
+							m.Headers[k] = v
+						}
+					}
+				}
+				// Apply expected_status default
+				if m.ExpectedStatus == 0 && grp.Defaults.ExpectedStatus != nil {
+					m.ExpectedStatus = *grp.Defaults.ExpectedStatus
+				}
 			}
 		}
 	}