package port

import (
	"testing"
)

func TestAddRange(t *testing.T) {
	tests := []struct {
		name      string
		startPort uint16
		endPort   uint16
		wantErr   bool
	}{
		{"normal range", 1000, 1002, false},
		{"invalid range", 2000, 1999, true},
		{"single port range", 3000, 3000, false},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			pm := New()
			err := pm.AddRange(tt.startPort, tt.endPort)
			if (err != nil) != tt.wantErr {
				t.Errorf("AddRange() error = %v, wantErr %v", err, tt.wantErr)
			}
		})
	}
}

func TestUnassigned(t *testing.T) {
	pm := New()
	_ = pm.AddRange(1000, 1002)

	tests := []struct {
		name   string
		status map[uint16]bool
		want   uint16
		wantOk bool
	}{
		{"all unassigned", map[uint16]bool{1000: false, 1001: false, 1002: false}, 1000, true},
		{"some assigned", map[uint16]bool{1000: true, 1001: false, 1002: true}, 1001, true},
		{"all assigned", map[uint16]bool{1000: true, 1001: true, 1002: true}, 0, false},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			for k, v := range tt.status {
				_ = pm.SetStatus(k, v)
			}
			got, gotOk := pm.Unassigned()
			if got != tt.want || gotOk != tt.wantOk {
				t.Errorf("Unassigned() got = %v, want %v, gotOk = %v, wantOk %v", got, tt.want, gotOk, tt.wantOk)
			}
		})
	}
}

func TestSetStatus(t *testing.T) {
	pm := New()
	_ = pm.AddRange(1000, 1002)

	tests := []struct {
		name     string
		port     uint16
		assigned bool
	}{
		{"assign port 1000", 1000, true},
		{"unassign port 1001", 1001, false},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			if err := pm.SetStatus(tt.port, tt.assigned); err != nil {
				t.Errorf("SetStatus() error = %v", err)
			}
			if status, _ := pm.(*port).ports[tt.port]; status != tt.assigned {
				t.Errorf("SetStatus() failed, port %v has status %v, want %v", tt.port, status, tt.assigned)
			}
		})
	}
}

func TestClaim(t *testing.T) {
	pm := New()
	_ = pm.AddRange(1000, 1002)

	tests := []struct {
		name   string
		port   uint16
		status bool
		want   bool
	}{
		{"claim unassigned port", 1000, false, true},
		{"claim already assigned port", 1001, true, false},
		{"claim non-existent port", 5000, false, true},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			if _, exists := pm.(*port).ports[tt.port]; exists {
				_ = pm.SetStatus(tt.port, tt.status)
			}

			got := pm.Claim(tt.port)
			if got != tt.want {
				t.Errorf("Claim() got = %v, want %v", got, tt.want)
			}

			if finalState := pm.(*port).ports[tt.port]; finalState != true {
				t.Errorf("Claim() did not update port %v status to 'assigned'", tt.port)
			}
		})
	}
}