package config

import "time"

// Authority levels for roles
const (
	AuthorityReadOnly   = "readonly"
	AuthoritySuggestion = "suggestion"
	AuthorityFull       = "full"
	AuthorityAdmin      = "admin"
)

// SecurityConfig defines security-related configuration
type SecurityConfig struct {
	KeyRotationDays  int           `yaml:"key_rotation_days"`
	AuditLogging     bool          `yaml:"audit_logging"`
	AuditPath        string        `yaml:"audit_path"`
	ElectionConfig   ElectionConfig `yaml:"election"`
}

// ElectionConfig defines election timing and behavior settings
type ElectionConfig struct {
	DiscoveryTimeout   time.Duration `yaml:"discovery_timeout"`
	HeartbeatTimeout   time.Duration `yaml:"heartbeat_timeout"`
	ElectionTimeout    time.Duration `yaml:"election_timeout"`
	DiscoveryBackoff   time.Duration `yaml:"discovery_backoff"`
	LeadershipScoring  *LeadershipScoring `yaml:"leadership_scoring,omitempty"`
}

// LeadershipScoring defines weights for election scoring
type LeadershipScoring struct {
	UptimeWeight      float64 `yaml:"uptime_weight"`
	CapabilityWeight  float64 `yaml:"capability_weight"`
	ExperienceWeight  float64 `yaml:"experience_weight"`
	LoadWeight        float64 `yaml:"load_weight"`
}

// AgeKeyPair represents an Age encryption key pair
type AgeKeyPair struct {
	PublicKey  string `yaml:"public_key"`
	PrivateKey string `yaml:"private_key"`
}

// RoleDefinition represents a role configuration
type RoleDefinition struct {
	Name          string      `yaml:"name"`
	Description   string      `yaml:"description"`
	Capabilities  []string    `yaml:"capabilities"`
	AccessLevel   string      `yaml:"access_level"`
	AuthorityLevel string     `yaml:"authority_level"`
	Keys          *AgeKeyPair `yaml:"keys,omitempty"`
	AgeKeys       *AgeKeyPair `yaml:"age_keys,omitempty"` // Legacy field name
	CanDecrypt    []string    `yaml:"can_decrypt,omitempty"` // Roles this role can decrypt
}

// GetPredefinedRoles returns the predefined roles for the system
func GetPredefinedRoles() map[string]*RoleDefinition {
	return map[string]*RoleDefinition{
		"project_manager": {
			Name:           "project_manager",
			Description:    "Project coordination and management",
			Capabilities:   []string{"coordination", "planning", "oversight"},
			AccessLevel:    "high",
			AuthorityLevel: AuthorityAdmin,
			CanDecrypt:     []string{"project_manager", "backend_developer", "frontend_developer", "devops_engineer", "security_engineer"},
		},
		"backend_developer": {
			Name:           "backend_developer", 
			Description:    "Backend development and API work",
			Capabilities:   []string{"backend", "api", "database"},
			AccessLevel:    "medium",
			AuthorityLevel: AuthorityFull,
			CanDecrypt:     []string{"backend_developer"},
		},
		"frontend_developer": {
			Name:           "frontend_developer",
			Description:    "Frontend UI development",
			Capabilities:   []string{"frontend", "ui", "components"},
			AccessLevel:    "medium",
			AuthorityLevel: AuthorityFull,
			CanDecrypt:     []string{"frontend_developer"},
		},
		"devops_engineer": {
			Name:           "devops_engineer",
			Description:    "Infrastructure and deployment",
			Capabilities:   []string{"infrastructure", "deployment", "monitoring"},
			AccessLevel:    "high",
			AuthorityLevel: AuthorityFull,
			CanDecrypt:     []string{"devops_engineer", "backend_developer"},
		},
		"security_engineer": {
			Name:           "security_engineer",
			Description:    "Security oversight and hardening", 
			Capabilities:   []string{"security", "audit", "compliance"},
			AccessLevel:    "high",
			AuthorityLevel: AuthorityAdmin,
			CanDecrypt:     []string{"security_engineer", "project_manager", "backend_developer", "frontend_developer", "devops_engineer"},
		},
	}
}

// CanDecryptRole checks if the current agent can decrypt content for a target role
func (c *Config) CanDecryptRole(targetRole string) (bool, error) {
	roles := GetPredefinedRoles()
	currentRole, exists := roles[c.Agent.Role]
	if !exists {
		return false, nil
	}
	
	targetRoleDef, exists := roles[targetRole]
	if !exists {
		return false, nil
	}
	
	// Simple access level check
	currentLevel := getAccessLevelValue(currentRole.AccessLevel)
	targetLevel := getAccessLevelValue(targetRoleDef.AccessLevel)
	
	return currentLevel >= targetLevel, nil
}

func getAccessLevelValue(level string) int {
	switch level {
	case "low":
		return 1
	case "medium":
		return 2
	case "high":
		return 3
	default:
		return 0
	}
}