package runtime

import (
	"context"
	"encoding/json"
	"fmt"
	"os"
	"path/filepath"
	"strings"
	"testing"
	"time"

	"browser.local/run/config"
	"browser.local/run/protocol"
)

func TestLifecycleExecutorHandlesSupportedJobs(t *testing.T) {
	executor := NewLifecycleExecutor()
	for _, capability := range SupportedLifecycleCapabilities() {
		assignment := lifecycleAssignment(capability)
		result := executor.Execute(assignment)
		if result.State != "succeeded" || result.Progress.Percent != 100 || result.ResultRef == "" {
			t.Fatalf("expected successful bounded result for %s, got %+v", capability, result)
		}
		for _, forbidden := range []string{"host path", "/Users/", "run socket", "api_key", "sk-"} {
			if strings.Contains(result.Message, forbidden) || strings.Contains(result.ResultRef, forbidden) {
				t.Fatalf("lifecycle result exposed forbidden content %q: %+v", forbidden, result)
			}
		}
	}
}

func TestLifecycleExecutorRejectsUnsupportedJobs(t *testing.T) {
	result := NewLifecycleExecutor().Execute(lifecycleAssignment("files.write"))
	if result.State != "failed" || result.ErrorCode != "unsupported_lifecycle_capability" || result.ResultRef != "" {
		t.Fatalf("expected unsupported lifecycle failure, got %+v", result)
	}
}

func TestLifecycleResultRequestUsesAssignmentLease(t *testing.T) {
	assignment := lifecycleAssignment(protocol.RunCapabilityProcessStart)
	execution := NewLifecycleExecutor().Execute(assignment)
	request := LifecycleResultRequest(assignment, "session-token", execution)

	if request.RunEndpointID != assignment.RunEndpointID || request.JobID != assignment.JobID || request.LeaseToken != assignment.LeaseToken || request.Attempt != assignment.Attempt {
		t.Fatalf("expected result request to use assignment lease, got %+v", request)
	}
	if request.SessionToken != "session-token" || request.State != "succeeded" {
		t.Fatalf("unexpected result request: %+v", request)
	}
}

func TestLifecycleExecutorRunsScopedCommandTemplateAndHooks(t *testing.T) {
	root := t.TempDir()
	assignment := lifecycleAssignment(protocol.RunCapabilityProcessStart)
	serverRoot := filepath.Join(root, assignment.ServerInstanceID)
	if err := os.MkdirAll(filepath.Join(serverRoot, "actions"), 0o755); err != nil {
		t.Fatalf("create action dir: %v", err)
	}
	template := LifecycleActionTemplate{
		Command: []string{"echo", "server-ready"},
		Env:     map[string]string{"GAME_MODE": "test"},
	}
	body, err := json.Marshal(template)
	if err != nil {
		t.Fatalf("marshal template: %v", err)
	}
	if err := os.WriteFile(filepath.Join(serverRoot, "actions", "start.json"), body, 0o644); err != nil {
		t.Fatalf("write template: %v", err)
	}
	assignment.TargetKey = "actions/start.json"
	logSink := &recordingLogSink{}
	artifactHook := &recordingArtifactHook{}

	result := NewLifecycleExecutor(
		WithLifecycleWorkspaceRoot(root),
		WithProcessLogSink(logSink),
		WithLifecycleArtifactHook(artifactHook),
	).Execute(assignment)

	if result.State != "succeeded" || result.ResultRef != "artifact://jobs/job-1/lifecycle-result" {
		t.Fatalf("expected scoped lifecycle success, got %+v", result)
	}
	if len(logSink.lines) != 1 || logSink.lines[0] != "stdout:server-ready" {
		t.Fatalf("expected process stdout to be logged, got %+v", logSink.lines)
	}
	if !artifactHook.called {
		t.Fatal("expected artifact hook to be called")
	}
}

func TestLifecycleExecutorRejectsUnsafeTemplates(t *testing.T) {
	root := t.TempDir()
	assignment := lifecycleAssignment(protocol.RunCapabilityProcessStart)
	serverRoot := filepath.Join(root, assignment.ServerInstanceID)
	if err := os.MkdirAll(filepath.Join(serverRoot, "actions"), 0o755); err != nil {
		t.Fatalf("create action dir: %v", err)
	}
	for name, template := range map[string]LifecycleActionTemplate{
		"absolute": {Command: []string{"/bin/echo", "nope"}},
		"shell":    {Command: []string{"sh", "-c", "echo nope"}},
		"secret":   {Command: []string{"echo", "sk-secret"}},
		"env":      {Command: []string{"echo", "ok"}, Env: map[string]string{"AWS_SECRET_ACCESS_KEY": "secret"}},
	} {
		body, err := json.Marshal(template)
		if err != nil {
			t.Fatalf("marshal %s: %v", name, err)
		}
		actionPath := filepath.Join(serverRoot, "actions", name+".json")
		if err := os.WriteFile(actionPath, body, 0o644); err != nil {
			t.Fatalf("write %s: %v", name, err)
		}
		unsafeAssignment := assignment
		unsafeAssignment.TargetKey = "actions/" + name + ".json"
		result := NewLifecycleExecutor(WithLifecycleWorkspaceRoot(root)).Execute(unsafeAssignment)
		if result.State != "failed" || result.ErrorCode != "unsafe_lifecycle_command" {
			t.Fatalf("expected unsafe command rejection for %s, got %+v", name, result)
		}
	}
}

func TestLifecycleExecutorRejectsWorkspaceEscapes(t *testing.T) {
	root := t.TempDir()
	assignment := lifecycleAssignment(protocol.RunCapabilityProcessStart)
	assignment.TargetKey = "../outside.json"

	result := NewLifecycleExecutor(WithLifecycleWorkspaceRoot(root)).Execute(assignment)

	if result.State != "failed" || result.ErrorCode != "unsafe_lifecycle_command" {
		t.Fatalf("expected workspace escape rejection, got %+v", result)
	}
}

func TestLifecycleExecutorKeepsSiblingInstanceWorkspacesIsolated(t *testing.T) {
	root := t.TempDir()
	first := lifecycleAssignment(protocol.RunCapabilityProcessStart)
	first.ServerInstanceID = "server-alpha"
	second := lifecycleAssignment(protocol.RunCapabilityProcessStop)
	second.JobID = "job-2"
	second.ServerInstanceID = "server-beta"
	for _, assignment := range []protocol.RunJobAssignment{first, second} {
		serverRoot := filepath.Join(root, assignment.ServerInstanceID)
		if err := os.MkdirAll(filepath.Join(serverRoot, "actions"), 0o755); err != nil {
			t.Fatalf("create action dir for %s: %v", assignment.ServerInstanceID, err)
		}
		body, err := json.Marshal(LifecycleActionTemplate{Command: []string{"echo", assignment.ServerInstanceID}})
		if err != nil {
			t.Fatalf("marshal template: %v", err)
		}
		if err := os.WriteFile(filepath.Join(serverRoot, "actions", "lifecycle.json"), body, 0o644); err != nil {
			t.Fatalf("write template for %s: %v", assignment.ServerInstanceID, err)
		}
	}
	first.TargetKey = "actions/lifecycle.json"
	second.TargetKey = "actions/lifecycle.json"
	logSink := &recordingLogSink{}
	executor := NewLifecycleExecutor(WithLifecycleWorkspaceRoot(root), WithProcessLogSink(logSink))

	firstResult := executor.Execute(first)
	secondResult := executor.Execute(second)

	if firstResult.State != "succeeded" || secondResult.State != "succeeded" {
		t.Fatalf("expected both lifecycle jobs to succeed, got first=%+v second=%+v", firstResult, secondResult)
	}
	joined := strings.Join(logSink.lines, "\n")
	if !strings.Contains(joined, "stdout:server-alpha") || !strings.Contains(joined, "stdout:server-beta") {
		t.Fatalf("expected instance-specific output, got %q", joined)
	}
	if _, err := os.Stat(filepath.Join(root, "server-alpha", "actions", "lifecycle.json")); err != nil {
		t.Fatalf("expected alpha template to remain scoped: %v", err)
	}
	if _, err := os.Stat(filepath.Join(root, "server-beta", "actions", "lifecycle.json")); err != nil {
		t.Fatalf("expected beta template to remain scoped: %v", err)
	}
}

func TestLifecycleExecutorCancelsRunningCommand(t *testing.T) {
	ctx, cancel := context.WithCancel(context.Background())
	cancel()

	result := NewLifecycleExecutor(WithProcessSupervisor(blockingSupervisor{})).ExecuteContext(ctx, lifecycleAssignment(protocol.RunCapabilityProcessStart))

	if result.State != "cancelled" || result.ErrorCode != "lifecycle_cancelled" {
		t.Fatalf("expected cancelled lifecycle result, got %+v", result)
	}
}

func TestSmokeSummaryReportsLifecycleCapabilities(t *testing.T) {
	summary := SmokeSummary(config.Config{Mode: "smoke", PlatformURL: "http://platform.test"})
	for _, capability := range SupportedLifecycleCapabilities() {
		if !containsCapability(summary.Capabilities, capability) {
			t.Fatalf("expected smoke capabilities to include %s, got %+v", capability, summary.Capabilities)
		}
	}
}

func TestSmokeSummaryReportsLogReadCapability(t *testing.T) {
	summary := SmokeSummary(config.Config{Mode: "smoke", PlatformURL: "http://platform.test"})
	if !containsCapability(summary.Capabilities, protocol.RunCapabilityLogsRead) {
		t.Fatalf("expected smoke capabilities to include %s, got %+v", protocol.RunCapabilityLogsRead, summary.Capabilities)
	}
}

type recordingLogSink struct {
	lines []string
}

func (sink *recordingLogSink) Append(_ context.Context, _ protocol.RunJobAssignment, stream string, line string) error {
	sink.lines = append(sink.lines, stream+":"+line)
	return nil
}

type recordingArtifactHook struct {
	called bool
}

func (hook *recordingArtifactHook) QueueLifecycleResult(_ context.Context, assignment protocol.RunJobAssignment, _ ProcessResult) (string, error) {
	hook.called = true
	return fmt.Sprintf("artifact://jobs/%s/lifecycle-result", assignment.JobID), nil
}

type blockingSupervisor struct{}

func (blockingSupervisor) Run(ctx context.Context, _ ProcessCommand) (ProcessResult, error) {
	<-ctx.Done()
	return ProcessResult{ExitCode: -1}, ctx.Err()
}

func lifecycleAssignment(capability string) protocol.RunJobAssignment {
	now := time.Date(2026, 7, 3, 12, 0, 0, 0, time.UTC)
	return protocol.RunJobAssignment{
		JobID:            "job-1",
		ServerInstanceID: "server-1",
		RunEndpointID:    "run-local",
		Capability:       capability,
		IdempotencyKey:   "idem-1",
		State:            "accepted",
		LeaseToken:       "lease-1",
		Attempt:          1,
		CreatedAt:        now,
		UpdatedAt:        now,
	}
}

func containsCapability(capabilities []string, capability string) bool {
	for _, item := range capabilities {
		if item == capability {
			return true
		}
	}
	return false
}