feat: use a debug logger for agent

agent/internal/config/config.go

@@ -0,0 +1,52 @@
+package config
+
+import "os"
+
+// Config represents the configuration for the agent.
+type Config struct {
+	Debug        bool
+	Hostname     string
+	TSControlURL string
+	TSAuthKey    string
+	HPControlURL string
+	HPAuthKey    string
+}
+
+const (
+	DebugEnv        = "HEADPLANE_AGENT_DEBUG"
+	HostnameEnv     = "HEADPLANE_AGENT_HOSTNAME"
+	TSControlURLEnv = "HEADPLANE_AGENT_TS_SERVER"
+	TSAuthKeyEnv    = "HEADPLANE_AGENT_TS_AUTHKEY"
+	HPControlURLEnv = "HEADPLANE_AGENT_HP_SERVER"
+	HPAuthKeyEnv    = "HEADPLANE_AGENT_HP_AUTHKEY"
+)
+
+// Load reads the agent configuration from environment variables.
+func Load() (*Config, error) {
+	c := &Config{
+		Debug:        false,
+		Hostname:     os.Getenv(HostnameEnv),
+		TSControlURL: os.Getenv(TSControlURLEnv),
+		TSAuthKey:    os.Getenv(TSAuthKeyEnv),
+		HPControlURL: os.Getenv(HPControlURLEnv),
+		HPAuthKey:    os.Getenv(HPAuthKeyEnv),
+	}
+
+	if os.Getenv(DebugEnv) == "true" {
+		c.Debug = true
+	}
+
+	if err := validateRequired(c); err != nil {
+		return nil, err
+	}
+
+	if err := validateTSReady(c); err != nil {
+		return nil, err
+	}
+
+	if err := validateHPReady(c); err != nil {
+		return nil, err
+	}
+
+	return c, nil
+}