package tests

import (
	"log/slog"
	"strings"
	"testing"

	"git.cloudinit.dev/coreci/orca/internal/emitter"
	"git.cloudinit.dev/coreci/orca/internal/jobspec"
	"git.cloudinit.dev/coreci/orca/internal/proxmox"
	"git.cloudinit.dev/coreci/orca/internal/traefik"
)

// TestNftEmitter_PostroutingAndDNATTarget (REQ-173) verifies the nft
// emitter renders the postrouting masquerade chain and supports
// DNATTarget substitution.
func TestNftEmitter_PostroutingAndDNATTarget(t *testing.T) {
	files, err := emitter.NftEmitter{}.RenderNftConfig(emitter.NftClusterConfig{
		DNATTarget: "10.99.0.10",
		EnableSNAT: true,
	})
	if err != nil {
		t.Fatalf("RenderNftConfig: %v", err)
	}
	c := files[0].Content
	if !strings.Contains(c, "chain postrouting") {
		t.Errorf("missing postrouting chain:\n%s", c)
	}
	if !strings.Contains(c, "masquerade") {
		t.Errorf("missing masquerade rule:\n%s", c)
	}
	if !strings.Contains(c, "dnat to 10.99.0.10:8443") {
		t.Errorf("missing custom DNAT target:\n%s", c)
	}
}

// TestNftEmitter_PriorityMinus10 (research Topic 2) verifies the input
// and forward chains use priority -10 for pve-firewall coexistence.
func TestNftEmitter_PriorityMinus10(t *testing.T) {
	files, _ := emitter.NftEmitter{}.RenderNftConfig(emitter.NftClusterConfig{})
	c := files[0].Content
	if !strings.Contains(c, "hook input priority -10;") {
		t.Errorf("input chain should use priority -10:\n%s", c)
	}
	if !strings.Contains(c, "hook forward priority -10;") {
		t.Errorf("forward chain should use priority -10:\n%s", c)
	}
}

// TestTraefikEmitter_TLSModel (REQ-172) verifies the dynamic config
// emits tls: {} and does NOT contain certResolver (dropped in v0.14).
func TestTraefikEmitter_TLSModel(t *testing.T) {
	spec := &jobspec.WorkloadSpec{
		Name:  "test-svc",
		Kind:  "Service",
		Ports: []jobspec.PortSpec{{Name: "http"}},
	}
	node := &emitter.Node{
		Hostname: "test-node",
	}
	files, err := emitter.TraefikEmitter{}.Render(spec, node)
	if err != nil {
		t.Fatalf("Render: %v", err)
	}
	c := files[0].Content
	if !strings.Contains(c, "tls: {}") {
		t.Errorf("missing tls: {} (v0.14 model):\n%s", c)
	}
	if strings.Contains(c, "certResolver: orca") {
		t.Errorf("certResolver: orca should be removed (v0.14):\n%s", c)
	}
}

// TestTraefikImageRef verifies the image reference resolution for the
// orca-traefik podman container.
func TestTraefikImageRef(t *testing.T) {
	ref := traefik.ImageRef("v0.13.7")
	want := "git.cloudinit.dev/coreci/orca-traefik:v0.13.7"
	if ref != want {
		t.Errorf("ImageRef(v0.13.7) = %q, want %q", ref, want)
	}
	// Dev build falls back to latest.
	ref = traefik.ImageRef("dev")
	if ref != "git.cloudinit.dev/coreci/orca-traefik:latest" {
		t.Errorf("ImageRef(dev) = %q, want latest", ref)
	}
}

// TestProxmox_FloatingIP_LXC_ProvisioningCommands (REQ-176) verifies
// the ProvisionIngressLXC function sends the correct pct create
// command with the right net0 parameters.
func TestProxmox_FloatingIP_LXC_ProvisioningCommands(t *testing.T) {
	var cmds []string
	execFn := func(cmd string) ([]byte, error) {
		cmds = append(cmds, cmd)
		// Simulate: pct status returns "absent" on first call, then OK.
		if strings.Contains(cmd, "pct status 201") {
			return []byte("absent\n"), nil
		}
		if strings.Contains(cmd, "pct create") {
			return []byte(""), nil
		}
		if strings.Contains(cmd, "pct start 201") {
			return []byte(""), nil
		}
		if strings.Contains(cmd, "hostname -I") {
			return []byte("203.0.113.10\n"), nil
		}
		return []byte(""), nil
	}
	err := proxmox.ProvisionIngressLXC(nil, execFn, proxmox.FloatingIPOptions{
		FloatingIP:  "203.0.113.10",
		Gateway:     "203.0.113.1",
		MAC:         "02:01:02:03:04:05",
		NetPrefix:   24,
		LXCTemplate: "ubuntu-24.04",
	}, slog.Default())
	if err != nil {
		t.Fatalf("ProvisionIngressLXC: %v", err)
	}
	// Verify pct create has the right net0 params.
	foundCreate := false
	for _, c := range cmds {
		if strings.Contains(c, "pct create") {
			foundCreate = true
			if !strings.Contains(c, "hostname ingress") {
				t.Errorf("pct create missing hostname ingress: %s", c)
			}
			if !strings.Contains(c, "hwaddr=02:01:02:03:04:05") {
				t.Errorf("pct create missing hwaddr: %s", c)
			}
			if !strings.Contains(c, "ip=203.0.113.10/24") {
				t.Errorf("pct create missing ip: %s", c)
			}
			if !strings.Contains(c, "gw=203.0.113.1") {
				t.Errorf("pct create missing gw: %s", c)
			}
			if !strings.Contains(c, "nesting=1,keyctl=1,fuse=1") {
				t.Errorf("pct create missing features (research Topic 3): %s", c)
			}
		}
	}
	if !foundCreate {
		t.Errorf("pct create command not sent\ncommands: %v", cmds)
	}
}

// TestProxmox_GenerateRandomMAC (D-261) verifies MAC generation produces
// a valid locally-administered MAC.
func TestProxmox_GenerateRandomMAC(t *testing.T) {
	mac, err := proxmox.GenerateRandomMAC()
	if err != nil {
		t.Fatalf("GenerateRandomMAC: %v", err)
	}
	if !strings.HasPrefix(mac, "02:") {
		t.Errorf("MAC should start with 02: (locally administered): %s", mac)
	}
	// Verify it's 6 octets.
	parts := strings.Split(mac, ":")
	if len(parts) != 6 {
		t.Errorf("MAC should have 6 octets: %s", mac)
	}
}