package tools

import (
	"context"
	"encoding/json"
	"strings"
	"testing"
	"time"

	"agent-system-backend/internal/docgen"
	core "agent-system-core"
)

type capturedArtifact struct {
	metadata core.Artifact
	content  []byte
}

type documentRendererCtx struct {
	ctx       context.Context
	artifacts []capturedArtifact
	receipt   docgen.OperationReceipt
	err       error
}

func (c *documentRendererCtx) ProjectID() string      { return "conversation-project" }
func (c *documentRendererCtx) ConversationID() string { return "conversation" }
func (c *documentRendererCtx) OwnerID() string        { return "alice" }
func (c *documentRendererCtx) WorkspaceRoot() string  { return "" }
func (c *documentRendererCtx) SettingBool(string, bool) bool {
	return false
}
func (c *documentRendererCtx) Context() context.Context {
	if c.ctx != nil {
		return c.ctx
	}
	return context.Background()
}
func (c *documentRendererCtx) Retrieve(core.RetrievalQuery) ([]core.RetrievalHit, error) {
	return nil, nil
}
func (c *documentRendererCtx) PeerConversations() ([]core.Conversation, error) { return nil, nil }
func (c *documentRendererCtx) PeerConversationMessages(string, int) ([]core.Message, error) {
	return nil, nil
}
func (c *documentRendererCtx) WriteArtifact(name, kind, mime string, content []byte) (core.Artifact, error) {
	artifact := core.Artifact{ID: core.ID("art-" + name), ProjectID: "conversation-project", Owner: "alice", Name: name, Kind: kind, MIME: mime, Size: int64(len(content))}
	c.artifacts = append(c.artifacts, capturedArtifact{metadata: artifact, content: append([]byte(nil), content...)})
	return artifact, nil
}
func (c *documentRendererCtx) ExecuteDocumentDelivery(context.Context, docgen.OperationRequest) (docgen.OperationReceipt, error) {
	return c.receipt, c.err
}

func TestRenderDocumentToolWritesMarkdownFirstAndReportsPackageHashes(t *testing.T) {
	registry := NewRegistry()
	if err := registry.RegisterBuiltin(); err != nil {
		t.Fatal(err)
	}
	arguments, _ := json.Marshal(map[string]any{
		"operationId": "operation-1", "name": "研发纪要", "documentId": "workspace-minutes", "documentType": "general", "language": "zh-CN",
		"markdown": "# 研发纪要\n\n正文。\n", "mode": "preview",
		"controlled": false, "projectDocument": false,
	})
	ctx := &documentRendererCtx{receipt: docgen.OperationReceipt{
		OperationID: "operation-1", Outcome: "complete", State: "complete", Renderer: docgen.RendererIdentity,
		FrozenAt: time.Date(2026, 10, 15, 12, 0, 0, 0, time.UTC),
		Artifacts: []docgen.ReceiptArtifact{
			{Role: "markdown", ID: "md", Name: "研发纪要.md", SHA256: strings.Repeat("a", 64)},
			{Role: "docx", ID: "docx", Name: "研发纪要.docx", SHA256: strings.Repeat("b", 64)},
			{Role: "manifest", ID: "manifest", Name: "研发纪要.manifest.json", SHA256: strings.Repeat("c", 64)},
			{Role: "archive", ID: "archive", Name: "研发纪要.zip", SHA256: strings.Repeat("d", 64)},
		},
	}}
	result := registry.Execute(ctx, core.ToolCallRequest{CallID: "render-1", Name: "render_document", Arguments: arguments})
	if result.Status != "ok" {
		t.Fatalf("render_document: %s", result.Output)
	}
	var receipt docgen.OperationReceipt
	if err := json.Unmarshal([]byte(result.Output), &receipt); err != nil {
		t.Fatal(err)
	}
	if receipt.OperationID != "operation-1" || receipt.Outcome != "complete" || len(receipt.Artifacts) != 4 || receipt.FrozenAt.IsZero() {
		t.Fatalf("durable receipt = %#v", receipt)
	}
	for _, artifact := range receipt.Artifacts {
		if !strings.Contains(result.Output, artifact.SHA256) {
			t.Errorf("tool output omitted %s hash %s", artifact.Role, artifact.SHA256)
		}
	}
}

func TestRenderDocumentToolDescriptionReportsPublishedWorkspaceDefault(t *testing.T) {
	registry := NewRegistry()
	if err := registry.RegisterBuiltin(); err != nil {
		t.Fatal(err)
	}
	description, _, found := registry.Get("render_document")
	if !found {
		t.Fatal("render_document is not registered")
	}
	for _, required := range []string{"已发布", "RDM", "非受控工作区"} {
		if !strings.Contains(description.Description, required) {
			t.Errorf("render_document description missing %q: %s", required, description.Description)
		}
	}
	if strings.Contains(description.Description, "候选") {
		t.Errorf("render_document description still calls the organization default a candidate: %s", description.Description)
	}
}

func TestRenderDocumentToolSchemaIsClosedAndUsesOnlyOperationIdentity(t *testing.T) {
	registry := NewRegistry()
	if err := registry.RegisterBuiltin(); err != nil {
		t.Fatal(err)
	}
	description, _, found := registry.Get("render_document")
	if !found {
		t.Fatal("render_document is not registered")
	}
	var schema struct {
		AdditionalProperties *bool                      `json:"additionalProperties"`
		Properties           map[string]json.RawMessage `json:"properties"`
		Required             []string                   `json:"required"`
	}
	if err := json.Unmarshal(description.Parameters, &schema); err != nil {
		t.Fatal(err)
	}
	if schema.AdditionalProperties == nil || *schema.AdditionalProperties {
		t.Fatal("render_document schema is not closed")
	}
	if _, found := schema.Properties["operationId"]; !found {
		t.Fatal("render_document schema omitted operationId")
	}
	if _, found := schema.Properties["frozenAt"]; found {
		t.Fatal("render_document still accepts model-supplied frozenAt")
	}
	wantRequired := map[string]bool{"operationId": true, "name": true, "documentId": true, "markdown": true, "controlled": true, "projectDocument": true}
	for _, name := range schema.Required {
		delete(wantRequired, name)
	}
	if len(wantRequired) != 0 {
		t.Fatalf("render_document required fields missing: %#v", wantRequired)
	}
	arguments := json.RawMessage(`{"operationId":"closed-schema","name":"Report","documentId":"report","markdown":"# Report\n","controlled":false,"projectDocument":false,"frozenAt":"2000-01-01T00:00:00Z"}`)
	result := registry.Execute(&documentRendererCtx{}, core.ToolCallRequest{CallID: "closed-schema", Name: "render_document", Arguments: arguments})
	if result.Status != "error" || !strings.Contains(result.Output, `unknown field "frozenAt"`) {
		t.Fatalf("model-supplied frozenAt was accepted: %#v", result)
	}
}

func TestPythonToolDescriptionDoesNotAdvertiseWordBypass(t *testing.T) {
	registry := NewRegistry()
	if err := RegisterInterpreterTools(registry); err != nil {
		t.Fatal(err)
	}
	description, _, found := registry.Get("run_python")
	if !found {
		t.Fatal("run_python is not registered")
	}
	for _, forbidden := range []string{"python-docx", "生成文档", "docx_kit"} {
		if strings.Contains(description.Description, forbidden) {
			t.Fatalf("run_python description advertises Word bypass %q: %s", forbidden, description.Description)
		}
	}
}

func TestRenderDocumentToolRequiresExplicitRouteDeclaration(t *testing.T) {
	registry := NewRegistry()
	if err := registry.RegisterBuiltin(); err != nil {
		t.Fatal(err)
	}
	arguments, _ := json.Marshal(map[string]any{
		"operationId": "operation-ambiguous", "name": "未声明路由", "documentId": "ambiguous", "markdown": "# 文档\n",
		"mode": "preview",
	})
	ctx := &documentRendererCtx{}
	result := registry.Execute(ctx, core.ToolCallRequest{CallID: "render-3", Name: "render_document", Arguments: arguments})
	if result.Status != "error" || !strings.Contains(result.Output, "controlled and projectDocument must be explicit") {
		t.Fatalf("ambiguous route result = %#v", result)
	}
	if len(ctx.artifacts) != 0 {
		t.Fatalf("ambiguous route wrote %d artifacts", len(ctx.artifacts))
	}
}

func TestRenderDocumentToolRejectsControlledRouteWithoutArtifacts(t *testing.T) {
	registry := NewRegistry()
	if err := registry.RegisterBuiltin(); err != nil {
		t.Fatal(err)
	}
	arguments, _ := json.Marshal(map[string]any{
		"operationId": "operation-controlled", "name": "受控文档", "documentId": "controlled", "documentType": "dhf", "language": "zh-CN",
		"markdown": "# 受控文档\n", "mode": "preview",
		"controlled": true, "projectDocument": false,
	})
	ctx := &documentRendererCtx{}
	result := registry.Execute(ctx, core.ToolCallRequest{CallID: "render-2", Name: "render_document", Arguments: arguments})
	if result.Status != "error" || !strings.Contains(result.Output, "RDM") {
		t.Fatalf("controlled render result = %#v", result)
	}
	if len(ctx.artifacts) != 0 {
		t.Fatalf("controlled fallback wrote %d artifacts", len(ctx.artifacts))
	}
}