package models

// AdminPermission represents platform-level admin permissions as a bitmask
type AdminPermission uint32

const (
	// User Management (bits 0-3)
	AdminPermViewUsers        AdminPermission = 1 << iota // View user profiles
	AdminPermBanUsers                                     // Ban/unban users
	AdminPermEditUsers                                    // Edit user details
	AdminPermImpersonateUsers                             // Login as user (support)

	// Worker Management (bits 4-5)
	AdminPermViewWorkers   // View worker list
	AdminPermManageWorkers // Edit workers, reassign emails

	// Warmup Management (bits 6-8)
	AdminPermViewWarmupPool   // View warmup pool
	AdminPermManageWarmupBans // Block/unblock accounts
	AdminPermReviewAppeals    // Review ban appeals

	// Campaign Management (bits 9-10)
	AdminPermViewCampaigns // View any campaign
	AdminPermStopCampaigns // Force-stop campaigns

	// Analytics (bits 11-12)
	AdminPermViewAnalytics // Platform analytics
	AdminPermViewAuditLogs // Admin audit logs

	// Settings (bits 13-14)
	AdminPermManageRateLimits // User rate limits
	AdminPermManageSettings   // Platform settings

	// Enterprise (bits 15-18)
	AdminPermViewEnterpriseInquiries   // View inquiries
	AdminPermManageEnterpriseInquiries // Process inquiries
	AdminPermManagePlans               // Create/edit custom plans
	AdminPermManageBilling             // Refunds, adjust billing

	// Super Admin (bit 19)
	AdminPermGrantAdminAccess // Grant/revoke admin permissions
)

// AllAdminPermissions contains all admin permissions
const AllAdminPermissions AdminPermission = (1 << 20) - 1

// HasPermission checks if the permission bitmask contains the specified permission
func (p AdminPermission) HasPermission(perm AdminPermission) bool {
	return p&perm == perm
}

// AddPermission adds a permission to the bitmask
func (p AdminPermission) AddPermission(perm AdminPermission) AdminPermission {
	return p | perm
}

// RemovePermission removes a permission from the bitmask
func (p AdminPermission) RemovePermission(perm AdminPermission) AdminPermission {
	return p &^ perm
}

// IsAdmin returns true if the user has any admin permissions
func (p AdminPermission) IsAdmin() bool {
	return p > 0
}

// IsSuperAdmin returns true if the user has all admin permissions
func (p AdminPermission) IsSuperAdmin() bool {
	return p == AllAdminPermissions
}

// AdminRoleName represents predefined admin role names
type AdminRoleName string

const (
	AdminRoleSuper   AdminRoleName = "super"
	AdminRoleSupport AdminRoleName = "support"
	AdminRoleOps     AdminRoleName = "ops"
	AdminRoleAnalyst AdminRoleName = "analyst"
)

// AdminRolePermissions maps predefined roles to their permissions
var AdminRolePermissions = map[AdminRoleName]AdminPermission{
	AdminRoleSuper: AllAdminPermissions,
	AdminRoleSupport: AdminPermViewUsers | AdminPermViewCampaigns | AdminPermViewWarmupPool |
		AdminPermManageWarmupBans | AdminPermReviewAppeals | AdminPermViewAuditLogs |
		AdminPermViewEnterpriseInquiries,
	AdminRoleOps: AdminPermViewWorkers | AdminPermManageWorkers | AdminPermViewAnalytics |
		AdminPermViewAuditLogs | AdminPermManageRateLimits,
	AdminRoleAnalyst: AdminPermViewUsers | AdminPermViewCampaigns | AdminPermViewAnalytics |
		AdminPermViewAuditLogs,
}

// GetAdminRolePermissions returns the permissions for a predefined admin role
func GetAdminRolePermissions(role AdminRoleName) AdminPermission {
	if perms, ok := AdminRolePermissions[role]; ok {
		return perms
	}
	return 0
}

// PermissionInfo describes an admin permission
type PermissionInfo struct {
	Name        string          `json:"name"`
	Permission  AdminPermission `json:"permission"`
	Description string          `json:"description"`
	Category    string          `json:"category"`
}

// GetAllPermissionInfos returns information about all admin permissions
func GetAllPermissionInfos() []PermissionInfo {
	return []PermissionInfo{
		// User Management
		{Name: "view_users", Permission: AdminPermViewUsers, Description: "View user profiles and details", Category: "User Management"},
		{Name: "ban_users", Permission: AdminPermBanUsers, Description: "Ban and unban users", Category: "User Management"},
		{Name: "edit_users", Permission: AdminPermEditUsers, Description: "Edit user details", Category: "User Management"},
		{Name: "impersonate_users", Permission: AdminPermImpersonateUsers, Description: "Login as user for support", Category: "User Management"},

		// Worker Management
		{Name: "view_workers", Permission: AdminPermViewWorkers, Description: "View worker list and status", Category: "Worker Management"},
		{Name: "manage_workers", Permission: AdminPermManageWorkers, Description: "Edit workers and reassign emails", Category: "Worker Management"},

		// Warmup Management
		{Name: "view_warmup_pool", Permission: AdminPermViewWarmupPool, Description: "View warmup pool and participants", Category: "Warmup Management"},
		{Name: "manage_warmup_bans", Permission: AdminPermManageWarmupBans, Description: "Block and unblock warmup accounts", Category: "Warmup Management"},
		{Name: "review_appeals", Permission: AdminPermReviewAppeals, Description: "Review warmup ban appeals", Category: "Warmup Management"},

		// Campaign Management
		{Name: "view_campaigns", Permission: AdminPermViewCampaigns, Description: "View any campaign", Category: "Campaign Management"},
		{Name: "stop_campaigns", Permission: AdminPermStopCampaigns, Description: "Force-stop campaigns", Category: "Campaign Management"},

		// Analytics
		{Name: "view_analytics", Permission: AdminPermViewAnalytics, Description: "View platform analytics", Category: "Analytics"},
		{Name: "view_audit_logs", Permission: AdminPermViewAuditLogs, Description: "View admin audit logs", Category: "Analytics"},

		// Settings
		{Name: "manage_rate_limits", Permission: AdminPermManageRateLimits, Description: "Manage user rate limits", Category: "Settings"},
		{Name: "manage_settings", Permission: AdminPermManageSettings, Description: "Manage platform settings", Category: "Settings"},

		// Enterprise
		{Name: "view_enterprise_inquiries", Permission: AdminPermViewEnterpriseInquiries, Description: "View enterprise inquiries", Category: "Enterprise"},
		{Name: "manage_enterprise_inquiries", Permission: AdminPermManageEnterpriseInquiries, Description: "Process enterprise inquiries", Category: "Enterprise"},
		{Name: "manage_plans", Permission: AdminPermManagePlans, Description: "Create and edit custom plans", Category: "Enterprise"},
		{Name: "manage_billing", Permission: AdminPermManageBilling, Description: "Manage refunds and billing", Category: "Enterprise"},

		// Super Admin
		{Name: "grant_admin_access", Permission: AdminPermGrantAdminAccess, Description: "Grant or revoke admin permissions", Category: "Super Admin"},
	}
}