package runtime

import (
	"slices"
	"testing"
)

func requireEqualArgs(t *testing.T, got, want []string) {
	t.Helper()
	if !slices.Equal(got, want) {
		t.Fatalf("args mismatch\ngot:  %v\nwant: %v", got, want)
	}
}

func TestBuildRunArgs(t *testing.T) {
	p := &Podman{}

	t.Run("full spec", func(t *testing.T) {
		spec := ContainerSpec{
			Name:    "metacrypt-api",
			Image:   "mcr.svc.mcp.metacircular.net:8443/metacrypt:v1.0.0",
			Network: "docker_default",
			User:    "0:0",
			Restart: "unless-stopped",
			Ports:   []string{"127.0.0.1:18443:8443", "127.0.0.1:19443:9443"},
			Volumes: []string{"/srv/metacrypt:/srv/metacrypt", "/etc/ssl:/etc/ssl:ro"},
			Cmd:     []string{"server", "--config", "/srv/metacrypt/metacrypt.toml"},
		}
		requireEqualArgs(t, p.BuildRunArgs(spec), []string{
			"run", "-d", "--name", "metacrypt-api",
			"--network", "docker_default",
			"--user", "0:0",
			"--restart", "unless-stopped",
			"-p", "127.0.0.1:18443:8443",
			"-p", "127.0.0.1:19443:9443",
			"-v", "/srv/metacrypt:/srv/metacrypt",
			"-v", "/etc/ssl:/etc/ssl:ro",
			"mcr.svc.mcp.metacircular.net:8443/metacrypt:v1.0.0",
			"server", "--config", "/srv/metacrypt/metacrypt.toml",
		})
	})

	t.Run("minimal spec", func(t *testing.T) {
		spec := ContainerSpec{
			Name:  "test-app",
			Image: "img:latest",
		}
		requireEqualArgs(t, p.BuildRunArgs(spec), []string{
			"run", "-d", "--name", "test-app", "img:latest",
		})
	})

	t.Run("ports only", func(t *testing.T) {
		spec := ContainerSpec{
			Name:  "test-app",
			Image: "img:latest",
			Ports: []string{"8080:80", "8443:443"},
		}
		requireEqualArgs(t, p.BuildRunArgs(spec), []string{
			"run", "-d", "--name", "test-app",
			"-p", "8080:80", "-p", "8443:443",
			"img:latest",
		})
	})

	t.Run("volumes only", func(t *testing.T) {
		spec := ContainerSpec{
			Name:    "test-app",
			Image:   "img:latest",
			Volumes: []string{"/data:/data", "/config:/config:ro"},
		}
		requireEqualArgs(t, p.BuildRunArgs(spec), []string{
			"run", "-d", "--name", "test-app",
			"-v", "/data:/data", "-v", "/config:/config:ro",
			"img:latest",
		})
	})

	t.Run("env vars", func(t *testing.T) {
		spec := ContainerSpec{
			Name:  "test-app",
			Image: "img:latest",
			Env:   []string{"PORT=12345", "PORT_GRPC=12346"},
		}
		requireEqualArgs(t, p.BuildRunArgs(spec), []string{
			"run", "-d", "--name", "test-app",
			"-e", "PORT=12345", "-e", "PORT_GRPC=12346",
			"img:latest",
		})
	})

	t.Run("full spec with env", func(t *testing.T) {
		// Route-allocated ports: host port = container port (matches $PORT).
		spec := ContainerSpec{
			Name:    "svc-api",
			Image:   "img:latest",
			Network: "net",
			Ports:   []string{"127.0.0.1:12345:12345"},
			Volumes: []string{"/srv:/srv"},
			Env:     []string{"PORT=12345"},
		}
		requireEqualArgs(t, p.BuildRunArgs(spec), []string{
			"run", "-d", "--name", "svc-api",
			"--network", "net",
			"-p", "127.0.0.1:12345:12345",
			"-v", "/srv:/srv",
			"-e", "PORT=12345",
			"img:latest",
		})
	})

	t.Run("cmd after image", func(t *testing.T) {
		spec := ContainerSpec{
			Name:  "test-app",
			Image: "img:latest",
			Cmd:   []string{"serve", "--port", "8080"},
		}
		requireEqualArgs(t, p.BuildRunArgs(spec), []string{
			"run", "-d", "--name", "test-app",
			"img:latest",
			"serve", "--port", "8080",
		})
	})
}

func TestExtractVersion(t *testing.T) {
	tests := []struct {
		image string
		want  string
	}{
		{"registry.example.com:5000/img:v1.2.0", "v1.2.0"},
		{"img:latest", "latest"},
		{"img", ""},
		{"registry.example.com/path/img:v1", "v1"},
		{"registry.example.com:5000/path/img", ""},
	}

	for _, tt := range tests {
		t.Run(tt.image, func(t *testing.T) {
			got := ExtractVersion(tt.image)
			if got != tt.want {
				t.Fatalf("ExtractVersion(%q) = %q, want %q", tt.image, got, tt.want)
			}
		})
	}
}