package sourceagent

import (
	"bytes"
	"context"
	"crypto/sha256"
	"encoding/hex"
	"encoding/json"
	"errors"
	"fmt"
	"io"
	"net"
	"net/http"
	"net/url"
	"os"
	"os/exec"
	"path/filepath"
	"strconv"
	"strings"
	"time"
)

type DockerController struct {
	socket        string
	composeBinary string
	http          *http.Client
	apiPrefix     string
	engineVersion string
	apiVersion    string
}

func NewDockerController(ctx context.Context, socket, composeBinary string) (*DockerController, error) {
	socket = strings.TrimSpace(socket)
	if socket == "" {
		socket = "/var/run/docker.sock"
	}
	if composeBinary == "" {
		composeBinary = "docker"
	}
	transport := &http.Transport{DialContext: func(ctx context.Context, _, _ string) (net.Conn, error) {
		return (&net.Dialer{Timeout: 5 * time.Second}).DialContext(ctx, "unix", socket)
	}}
	d := &DockerController{socket: socket, composeBinary: composeBinary, http: &http.Client{Transport: transport, Timeout: 2 * time.Minute}}
	if err := d.negotiate(ctx); err != nil {
		return nil, err
	}
	return d, nil
}

func (d *DockerController) negotiate(ctx context.Context) error {
	var version struct {
		Version    string `json:"Version"`
		APIVersion string `json:"ApiVersion"`
	}
	if err := d.json(ctx, http.MethodGet, "/version", nil, &version); err != nil {
		return fmt.Errorf("docker socket unavailable: %w", err)
	}
	if strings.TrimSpace(version.APIVersion) == "" {
		return errors.New("docker engine did not report ApiVersion")
	}
	d.engineVersion, d.apiVersion = version.Version, version.APIVersion
	d.apiPrefix = "/v" + version.APIVersion
	return nil
}

func (d *DockerController) request(ctx context.Context, method, path string, body any) (*http.Response, error) {
	var r io.Reader
	if body != nil {
		data, err := json.Marshal(body)
		if err != nil {
			return nil, err
		}
		r = bytes.NewReader(data)
	}
	req, err := http.NewRequestWithContext(ctx, method, "http://docker"+path, r)
	if err != nil {
		return nil, err
	}
	if body != nil {
		req.Header.Set("Content-Type", "application/json")
	}
	return d.http.Do(req)
}

func (d *DockerController) json(ctx context.Context, method, path string, body, out any) error {
	resp, err := d.request(ctx, method, path, body)
	if err != nil {
		return err
	}
	defer resp.Body.Close()
	if resp.StatusCode/100 != 2 {
		data, _ := io.ReadAll(io.LimitReader(resp.Body, 8192))
		return fmt.Errorf("docker API %s %s: HTTP %d: %s", method, path, resp.StatusCode, strings.TrimSpace(string(data)))
	}
	if out == nil {
		_, _ = io.Copy(io.Discard, io.LimitReader(resp.Body, 1<<20))
		return nil
	}
	return json.NewDecoder(io.LimitReader(resp.Body, 16<<20)).Decode(out)
}

func (d *DockerController) ComposeAvailable(ctx context.Context) bool {
	path, err := exec.LookPath(d.composeBinary)
	if err != nil {
		return false
	}
	cctx, cancel := context.WithTimeout(ctx, 5*time.Second)
	defer cancel()
	cmd := exec.CommandContext(cctx, path, "compose", "version", "--short")
	cmd.Env = append(os.Environ(), "DOCKER_HOST=unix://"+d.socket)
	return cmd.Run() == nil
}

func (d *DockerController) Status(ctx context.Context) DockerControllerStatus {
	st := DockerControllerStatus{Enabled: true, Socket: d.socket, Reachable: true, EngineVersion: d.engineVersion, APIVersion: d.apiVersion, ComposeAvailable: d.ComposeAvailable(ctx), LastRefresh: time.Now().UTC()}
	inv, err := d.Inventory(ctx)
	if err != nil {
		st.Reachable = false
		st.LastError = err.Error()
		return st
	}
	// Heartbeats are intentionally bounded. The dashboard needs a useful
	// inventory sample, not every Docker metadata field from a very large host.
	if len(inv.Containers) > 100 {
		inv.Containers = inv.Containers[:100]
	}
	if len(inv.Networks) > 100 {
		inv.Networks = inv.Networks[:100]
	}
	if len(inv.Volumes) > 100 {
		inv.Volumes = inv.Volumes[:100]
	}
	st.Inventory = inv
	st.Containers = len(inv.Containers)
	st.Networks = len(inv.Networks)
	st.Volumes = len(inv.Volumes)
	for _, c := range inv.Containers {
		if c.State == "running" {
			st.Running++
		}
		if c.Health == "unhealthy" {
			st.Unhealthy++
		}
	}
	return st
}

func (d *DockerController) Inventory(ctx context.Context) (DockerInventory, error) {
	var rawContainers []struct {
		ID     string            `json:"Id"`
		Names  []string          `json:"Names"`
		Image  string            `json:"Image"`
		State  string            `json:"State"`
		Status string            `json:"Status"`
		Labels map[string]string `json:"Labels"`
	}
	if err := d.json(ctx, http.MethodGet, d.apiPrefix+"/containers/json?all=1", nil, &rawContainers); err != nil {
		return DockerInventory{}, err
	}
	out := DockerInventory{Containers: make([]DockerContainerSummary, 0, len(rawContainers))}
	for _, c := range rawContainers {
		health := ""
		lower := strings.ToLower(c.Status)
		if strings.Contains(lower, "(healthy)") {
			health = "healthy"
		} else if strings.Contains(lower, "(unhealthy)") {
			health = "unhealthy"
		} else if strings.Contains(lower, "health: starting") {
			health = "starting"
		}
		// Labels may contain large Compose/Kubernetes metadata and are not needed
		// by the controller dashboard. Omitting them keeps the signed heartbeat
		// inventory comfortably inside its 64 KiB persistence budget.
		out.Containers = append(out.Containers, DockerContainerSummary{ID: c.ID, Names: c.Names, Image: c.Image, State: c.State, Status: c.Status, Health: health})
	}
	var rawNetworks []struct {
		ID                  string `json:"Id"`
		Name, Driver, Scope string
	}
	if err := d.json(ctx, http.MethodGet, d.apiPrefix+"/networks", nil, &rawNetworks); err == nil {
		for _, n := range rawNetworks {
			out.Networks = append(out.Networks, DockerNetworkSummary{ID: n.ID, Name: n.Name, Driver: n.Driver, Scope: n.Scope})
		}
	}
	var rawVolumes struct {
		Volumes []struct{ Name, Driver, Scope string }
	}
	if err := d.json(ctx, http.MethodGet, d.apiPrefix+"/volumes", nil, &rawVolumes); err == nil {
		for _, v := range rawVolumes.Volumes {
			out.Volumes = append(out.Volumes, DockerVolumeSummary{Name: v.Name, Driver: v.Driver, Scope: v.Scope})
		}
	}
	return out, nil
}

func (d *DockerController) Execute(ctx context.Context, claim ControllerClaim) ControllerJobResult {
	started := time.Now().UTC()
	result := ControllerJobResult{JobID: claim.Job.ID, Status: ControllerJobSucceeded, Result: map[string]any{}}
	if err := validateControllerJob(claim.Job, claim.Policy); err != nil {
		result.Status = ControllerJobFailed
		result.Error = err.Error()
		return result
	}
	if claim.Job.DryRun || claim.Policy.DryRun {
		result.Result = map[string]any{"dry_run": true, "validated": true, "kind": claim.Job.Kind, "parameters": claim.Job.Parameters}
		result.DurationMS = time.Since(started).Milliseconds()
		return result
	}
	var err error
	switch claim.Job.Kind {
	case "inventory_refresh":
		var inv DockerInventory
		inv, err = d.Inventory(ctx)
		if err == nil {
			result.Result = map[string]any{"inventory": inv}
		}
	case "container_start", "container_stop", "container_restart", "container_remove":
		err = d.containerLifecycle(ctx, claim.Job, claim.Policy, result.Result)
	case "container_create":
		err = d.containerCreate(ctx, claim.Job, claim.Policy, result.Result)
	case "network_create", "network_remove":
		err = d.networkAction(ctx, claim.Job, claim.Policy, result.Result)
	case "volume_create", "volume_remove":
		err = d.volumeAction(ctx, claim.Job, claim.Policy, result.Result)
	case "compose_up", "compose_down", "compose_restart", "compose_pull", "compose_ps", "compute_capacity_compose", "compose_smoke_test":
		err = d.composeAction(ctx, claim.Job, claim.Policy, result.Result)
	case "evidence_http_probe":
		err = d.evidenceProbe(ctx, claim.Job, claim.Policy, result.Result)
	case "health_recovery":
		job := claim.Job
		job.Kind = "container_restart"
		err = d.containerLifecycle(ctx, job, claim.Policy, result.Result)
	default:
		err = errors.New("unsupported controller action")
	}
	if err != nil {
		result.Status = ControllerJobFailed
		result.Error = err.Error()
	}
	result.DurationMS = time.Since(started).Milliseconds()
	return result
}

func validateControllerJob(job ControllerJob, policy ControllerPolicy) error {
	if !policy.Enabled {
		return errors.New("docker controller master switch disabled")
	}
	if job.Autonomous && !policy.AutonomousEnabled {
		return errors.New("autonomous docker controller actions disabled")
	}
	if job.Autonomous {
		switch job.Kind {
		case "evidence_http_probe", "health_recovery", "compute_capacity_compose", "compose_smoke_test":
		default:
			return errors.New("job kind is not permitted for autonomous controller execution")
		}
	}
	if isDestructiveControllerKind(job.Kind) && !policy.AllowDestructive {
		return errors.New("destructive docker controller actions are disabled")
	}
	return nil
}

func isDestructiveControllerKind(kind string) bool {
	switch kind {
	case "container_remove", "network_remove", "volume_remove", "compose_down":
		return true
	}
	return false
}

func (d *DockerController) containerLifecycle(ctx context.Context, job ControllerJob, policy ControllerPolicy, out map[string]any) error {
	name := paramString(job.Parameters, "container")
	if name == "" {
		return errors.New("container is required")
	}
	if protectedName(name, policy.ProtectedContainers) {
		return errors.New("container is protected by controller policy")
	}
	id := url.PathEscape(name)
	var method, path string = http.MethodPost, d.apiPrefix + "/containers/" + id + "/" + strings.TrimPrefix(job.Kind, "container_")
	if job.Kind == "container_stop" || job.Kind == "container_restart" {
		path += "?t=15"
	}
	if job.Kind == "container_remove" {
		method = http.MethodDelete
		path = d.apiPrefix + "/containers/" + id + "?force=false&v=false"
	}
	if err := d.json(ctx, method, path, nil, nil); err != nil {
		return err
	}
	out["container"] = name
	out["action"] = job.Kind
	return nil
}

func (d *DockerController) containerCreate(ctx context.Context, job ControllerJob, policy ControllerPolicy, out map[string]any) error {
	image := paramString(job.Parameters, "image")
	name := paramString(job.Parameters, "name")
	if image == "" || name == "" {
		return errors.New("image and name are required")
	}
	if !imageAllowed(image, policy.AllowedImages) {
		return errors.New("image is not allowed by controller policy")
	}
	if protectedName(name, policy.ProtectedContainers) {
		return errors.New("container name is protected")
	}
	network := paramString(job.Parameters, "network")
	if network == "" {
		network = "bridge"
	}
	if network == "host" || network == "container" || strings.HasPrefix(network, "container:") {
		return errors.New("host/container network modes are forbidden")
	}
	cmd := paramStrings(job.Parameters, "command", 32, 2048)
	env := paramStrings(job.Parameters, "env", 64, 4096)
	mounts, err := namedVolumeMounts(job.Parameters["volumes"], policy)
	if err != nil {
		return err
	}
	memory := paramInt64(job.Parameters, "memory_bytes", 512<<20)
	if memory < 32<<20 {
		memory = 32 << 20
	}
	if memory > 8<<30 {
		memory = 8 << 30
	}
	nano := paramInt64(job.Parameters, "nano_cpus", 1_000_000_000)
	if nano < 100_000_000 {
		nano = 100_000_000
	}
	if nano > 4_000_000_000 {
		nano = 4_000_000_000
	}
	body := map[string]any{"Image": image, "Cmd": cmd, "Env": env, "Tty": false, "HostConfig": map[string]any{"NetworkMode": network, "Privileged": false, "ReadonlyRootfs": true, "CapDrop": []string{"ALL"}, "SecurityOpt": []string{"no-new-privileges:true"}, "Memory": memory, "NanoCpus": nano, "Mounts": mounts}}
	var created struct {
		ID string `json:"Id"`
	}
	path := d.apiPrefix + "/containers/create?name=" + url.QueryEscape(name)
	if err := d.json(ctx, http.MethodPost, path, body, &created); err != nil {
		return err
	}
	out["container_id"] = created.ID
	out["name"] = name
	if paramBool(job.Parameters, "start", true) {
		if err := d.json(ctx, http.MethodPost, d.apiPrefix+"/containers/"+url.PathEscape(created.ID)+"/start", nil, nil); err != nil {
			return err
		}
		out["started"] = true
	}
	return nil
}

func (d *DockerController) networkAction(ctx context.Context, job ControllerJob, policy ControllerPolicy, out map[string]any) error {
	name := paramString(job.Parameters, "network")
	if name == "" {
		return errors.New("network is required")
	}
	if protectedName(name, policy.ProtectedNetworks) {
		return errors.New("network is protected")
	}
	if job.Kind == "network_create" {
		driver := paramString(job.Parameters, "driver")
		if driver == "" {
			driver = "bridge"
		}
		if driver != "bridge" {
			return errors.New("only bridge networks may be created by the controller")
		}
		var r struct{ ID string }
		if err := d.json(ctx, http.MethodPost, d.apiPrefix+"/networks/create", map[string]any{"Name": name, "Driver": driver, "CheckDuplicate": true, "Internal": paramBool(job.Parameters, "internal", false)}, &r); err != nil {
			return err
		}
		out["network_id"] = r.ID
	} else {
		if err := d.json(ctx, http.MethodDelete, d.apiPrefix+"/networks/"+url.PathEscape(name), nil, nil); err != nil {
			return err
		}
	}
	out["network"] = name
	return nil
}
func (d *DockerController) volumeAction(ctx context.Context, job ControllerJob, policy ControllerPolicy, out map[string]any) error {
	name := paramString(job.Parameters, "volume")
	if name == "" {
		return errors.New("volume is required")
	}
	if protectedName(name, policy.ProtectedVolumes) {
		return errors.New("volume is protected")
	}
	if job.Kind == "volume_create" {
		var r map[string]any
		if err := d.json(ctx, http.MethodPost, d.apiPrefix+"/volumes/create", map[string]any{"Name": name, "Driver": "local"}, &r); err != nil {
			return err
		}
		out["volume"] = r
	} else {
		if err := d.json(ctx, http.MethodDelete, d.apiPrefix+"/volumes/"+url.PathEscape(name)+"?force=false", nil, nil); err != nil {
			return err
		}
		out["volume"] = name
	}
	return nil
}

func (d *DockerController) composeAction(ctx context.Context, job ControllerJob, policy ControllerPolicy, out map[string]any) error {
	if !d.ComposeAvailable(ctx) {
		return errors.New("docker compose CLI is not available in this controller agent")
	}
	file := paramString(job.Parameters, "compose_file")
	safe, err := allowedComposeFile(file, policy.AllowedComposeRoots)
	if err != nil {
		return err
	}
	project := paramString(job.Parameters, "project")
	if project == "" {
		project = "brain-controller"
	}
	service := paramString(job.Parameters, "service")
	run := func(args ...string) (string, error) {
		base := []string{"compose", "-f", safe, "-p", project}
		base = append(base, args...)
		cmd := exec.CommandContext(ctx, d.composeBinary, base...)
		cmd.Env = append(os.Environ(), "DOCKER_HOST=unix://"+d.socket)
		data, err := cmd.CombinedOutput()
		if len(data) > 256<<10 {
			data = data[:256<<10]
		}
		return strings.TrimSpace(string(data)), err
	}
	out["compose_file"] = safe
	out["project"] = project

	if job.Kind == "compose_smoke_test" {
		args := []string{"up", "-d", "--wait", "--wait-timeout", "120"}
		if service != "" {
			args = append(args, service)
		}
		up, err := run(args...)
		out["up_output"] = up
		if err != nil {
			return fmt.Errorf("compose smoke-test up failed: %w: %s", err, up)
		}
		ps, psErr := run("ps", "--format", "json")
		out["ps_output"] = ps
		out["smoke_test_passed"] = psErr == nil
		if paramBool(job.Parameters, "cleanup", false) {
			if !policy.AllowDestructive {
				return errors.New("smoke-test cleanup requires destructive actions to be enabled")
			}
			down, downErr := run("down", "--remove-orphans")
			out["cleanup_output"] = down
			if downErr != nil && psErr == nil {
				psErr = downErr
			}
		}
		if psErr != nil {
			return fmt.Errorf("compose smoke-test verification failed: %w", psErr)
		}
		return nil
	}

	action := strings.TrimPrefix(job.Kind, "compose_")
	if job.Kind == "compute_capacity_compose" {
		action = "up"
	}
	var args []string
	switch action {
	case "up":
		args = []string{"up", "-d"}
	case "down":
		args = []string{"down", "--remove-orphans"}
	case "restart":
		args = []string{"restart"}
	case "pull":
		args = []string{"pull"}
	case "ps":
		args = []string{"ps", "--format", "json"}
	default:
		return errors.New("unsupported compose action")
	}
	if service != "" && action != "down" {
		args = append(args, service)
	}
	data, err := run(args...)
	out["output"] = data
	out["action"] = action
	if err != nil {
		return fmt.Errorf("docker compose %s failed: %w: %s", action, err, data)
	}
	return nil
}

func (d *DockerController) evidenceProbe(ctx context.Context, job ControllerJob, policy ControllerPolicy, out map[string]any) error {
	target := paramString(job.Parameters, "url")
	u, err := url.Parse(target)
	if err != nil || u.Host == "" || (u.Scheme != "http" && u.Scheme != "https") {
		return errors.New("evidence probe requires absolute http(s) url")
	}
	if err := validateEvidenceProbeTarget(ctx, u); err != nil {
		return err
	}
	image := paramString(job.Parameters, "image")
	if image == "" {
		image = "curlimages/curl:8.11.1"
	}
	if !imageAllowed(image, policy.AllowedImages) {
		return errors.New("evidence probe image is not allowed")
	}
	_ = d.pullImage(ctx, image)
	name := "brain-evidence-" + strings.TrimPrefix(randomID("p"), "p-")
	marker := "__BRAIN_PROBE_META__"
	cmd := []string{"--silent", "--show-error", "--location", "--max-time", "25", "--connect-timeout", "10", "--max-filesize", "524288", "--output", "-", "--write-out", "\n" + marker + "%{http_code}|%{url_effective}|%{content_type}|%{size_download}", target}
	body := map[string]any{"Image": image, "Cmd": cmd, "Tty": true, "AttachStdout": true, "AttachStderr": true, "HostConfig": map[string]any{"NetworkMode": "bridge", "AutoRemove": false, "Privileged": false, "ReadonlyRootfs": true, "CapDrop": []string{"ALL"}, "SecurityOpt": []string{"no-new-privileges:true"}, "Memory": int64(128 << 20), "NanoCpus": int64(500_000_000)}}
	var created struct {
		ID string `json:"Id"`
	}
	if err := d.json(ctx, http.MethodPost, d.apiPrefix+"/containers/create?name="+url.QueryEscape(name), body, &created); err != nil {
		return err
	}
	defer d.json(context.Background(), http.MethodDelete, d.apiPrefix+"/containers/"+url.PathEscape(created.ID)+"?force=true&v=false", nil, nil)
	if err := d.json(ctx, http.MethodPost, d.apiPrefix+"/containers/"+url.PathEscape(created.ID)+"/start", nil, nil); err != nil {
		return err
	}
	var wait struct{ StatusCode int }
	if err := d.json(ctx, http.MethodPost, d.apiPrefix+"/containers/"+url.PathEscape(created.ID)+"/wait?condition=not-running", nil, &wait); err != nil {
		return err
	}
	resp, err := d.request(ctx, http.MethodGet, d.apiPrefix+"/containers/"+url.PathEscape(created.ID)+"/logs?stdout=1&stderr=1&tail=all", nil)
	if err != nil {
		return err
	}
	defer resp.Body.Close()
	raw, _ := io.ReadAll(io.LimitReader(resp.Body, 1<<20))
	text := string(raw)
	idx := strings.LastIndex(text, "\n"+marker)
	bodyBytes := raw
	meta := ""
	if idx >= 0 {
		bodyBytes = raw[:idx]
		meta = strings.TrimSpace(text[idx+1+len(marker):])
	}
	sum := sha256.Sum256(bodyBytes)
	out["url"] = target
	out["body_sha256"] = hex.EncodeToString(sum[:])
	out["captured_bytes"] = len(bodyBytes)
	out["exit_code"] = wait.StatusCode
	if meta != "" {
		parts := strings.Split(meta, "|")
		if len(parts) >= 4 {
			out["http_status"] = parts[0]
			out["effective_url"] = parts[1]
			out["content_type"] = parts[2]
			out["download_bytes"] = parts[3]
		}
	}
	if wait.StatusCode != 0 {
		return fmt.Errorf("evidence probe exited with code %d", wait.StatusCode)
	}
	return nil
}

func validateEvidenceProbeTarget(ctx context.Context, u *url.URL) error {
	if u == nil || u.User != nil {
		return errors.New("evidence probe target must not contain credentials")
	}
	host := strings.TrimSpace(strings.ToLower(u.Hostname()))
	if host == "" || host == "localhost" || strings.HasSuffix(host, ".localhost") || strings.HasSuffix(host, ".local") || strings.HasSuffix(host, ".internal") {
		return errors.New("evidence probe target must be a public host")
	}
	unsafeIP := func(ip net.IP) bool {
		return ip == nil || ip.IsLoopback() || ip.IsPrivate() || ip.IsUnspecified() || ip.IsLinkLocalUnicast() || ip.IsLinkLocalMulticast()
	}
	if literal := net.ParseIP(host); literal != nil {
		if unsafeIP(literal) {
			return errors.New("evidence probe target must not use a private or local IP")
		}
		return nil
	}
	lookupCtx, cancel := context.WithTimeout(ctx, 4*time.Second)
	defer cancel()
	addresses, err := net.DefaultResolver.LookupIPAddr(lookupCtx, host)
	if err != nil || len(addresses) == 0 {
		return errors.New("evidence probe target could not be resolved safely")
	}
	for _, address := range addresses {
		if unsafeIP(address.IP) {
			return errors.New("evidence probe target resolves to a private or local address")
		}
	}
	return nil
}

func (d *DockerController) pullImage(ctx context.Context, image string) error {
	repository, tag := splitDockerImageReference(image)
	path := d.apiPrefix + "/images/create?fromImage=" + url.QueryEscape(repository)
	if tag != "" {
		path += "&tag=" + url.QueryEscape(tag)
	}
	resp, err := d.request(ctx, http.MethodPost, path, nil)
	if err != nil {
		return err
	}
	defer resp.Body.Close()
	if resp.StatusCode/100 != 2 {
		return fmt.Errorf("docker image pull HTTP %d", resp.StatusCode)
	}
	_, err = io.Copy(io.Discard, io.LimitReader(resp.Body, 16<<20))
	return err
}

func splitDockerImageReference(image string) (repository, tag string) {
	image = strings.TrimSpace(image)
	if image == "" {
		return "", ""
	}
	// Digests are complete references and must not be split into tag syntax.
	if strings.Contains(image, "@") {
		return image, ""
	}
	lastSlash := strings.LastIndex(image, "/")
	lastColon := strings.LastIndex(image, ":")
	// A colon before the final slash belongs to a registry port, not to a tag.
	if lastColon > lastSlash {
		return image[:lastColon], image[lastColon+1:]
	}
	return image, ""
}

func imageAllowed(image string, allowed []string) bool {
	for _, a := range allowed {
		a = strings.TrimSpace(a)
		if a == "*" || image == a {
			return true
		}
		// Prefix allow rules must be explicit. A trailing ':', '/', or '@'
		// expresses "all tags/children/digests"; plain names stay exact so an
		// allowlist entry like "vendor/tool" cannot also permit
		// "vendor/tool-malicious".
		if (strings.HasSuffix(a, ":") || strings.HasSuffix(a, "/") || strings.HasSuffix(a, "@")) && strings.HasPrefix(image, a) {
			return true
		}
	}
	return false
}
func protectedName(name string, patterns []string) bool {
	name = strings.TrimPrefix(strings.TrimSpace(name), "/")
	for _, p := range patterns {
		p = strings.TrimSpace(p)
		if p == "" {
			continue
		}
		if ok, _ := filepath.Match(p, name); ok || strings.EqualFold(p, name) {
			return true
		}
	}
	return false
}
func allowedComposeFile(file string, roots []string) (string, error) {
	if strings.TrimSpace(file) == "" {
		return "", errors.New("compose_file is required")
	}
	abs, err := filepath.Abs(file)
	if err != nil {
		return "", err
	}
	resolved, err := filepath.EvalSymlinks(abs)
	if err != nil {
		return "", err
	}
	for _, root := range roots {
		rr, err := filepath.EvalSymlinks(root)
		if err != nil {
			rr = filepath.Clean(root)
		}
		rel, err := filepath.Rel(rr, resolved)
		if err == nil && rel != ".." && !strings.HasPrefix(rel, ".."+string(filepath.Separator)) {
			return resolved, nil
		}
	}
	return "", errors.New("compose file is outside allowed compose roots")
}
func namedVolumeMounts(raw any, policy ControllerPolicy) ([]map[string]any, error) {
	arr, ok := raw.([]any)
	if !ok && raw != nil {
		return nil, errors.New("volumes must be an array")
	}
	var out []map[string]any
	for _, item := range arr {
		m, ok := item.(map[string]any)
		if !ok {
			return nil, errors.New("invalid volume mount")
		}
		source := strings.TrimSpace(fmt.Sprint(m["source"]))
		target := strings.TrimSpace(fmt.Sprint(m["target"]))
		if source == "" || target == "" || !strings.HasPrefix(target, "/") {
			return nil, errors.New("named volume source and absolute target are required")
		}
		if protectedName(source, policy.ProtectedVolumes) {
			return nil, errors.New("volume is protected")
		}
		out = append(out, map[string]any{"Type": "volume", "Source": source, "Target": target, "ReadOnly": toBool(m["read_only"], false)})
	}
	return out, nil
}
func paramString(m map[string]any, key string) string {
	if m == nil {
		return ""
	}
	return strings.TrimSpace(fmt.Sprint(m[key]))
}
func paramBool(m map[string]any, key string, def bool) bool {
	if m == nil {
		return def
	}
	v, ok := m[key]
	if !ok {
		return def
	}
	return toBool(v, def)
}
func toBool(v any, def bool) bool {
	switch x := v.(type) {
	case bool:
		return x
	case string:
		b, e := strconv.ParseBool(x)
		if e == nil {
			return b
		}
	case float64:
		return x != 0
	}
	return def
}
func paramInt64(m map[string]any, key string, def int64) int64 {
	if m == nil {
		return def
	}
	switch v := m[key].(type) {
	case float64:
		return int64(v)
	case int:
		return int64(v)
	case int64:
		return v
	case string:
		n, e := strconv.ParseInt(v, 10, 64)
		if e == nil {
			return n
		}
	}
	return def
}
func paramStrings(m map[string]any, key string, max, each int) []string {
	if m == nil {
		return nil
	}
	raw, ok := m[key].([]any)
	if !ok {
		if ss, ok := m[key].([]string); ok {
			return ss
		}
		return nil
	}
	if len(raw) > max {
		raw = raw[:max]
	}
	out := make([]string, 0, len(raw))
	for _, v := range raw {
		s := fmt.Sprint(v)
		if len(s) > each {
			s = s[:each]
		}
		out = append(out, s)
	}
	return out
}