package runtime

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

	"agent-desk/internal/ai/workflow/dsl"
	workflowregistry "agent-desk/internal/ai/workflow/registry"
	"agent-desk/internal/models"
	"agent-desk/internal/pkg/enums"
	"agent-desk/internal/pkg/toolx"

	"github.com/glebarez/sqlite"
	"github.com/mlogclub/simple/sqls"
	"gorm.io/gorm"
)

func TestNormalizeAllowedToolCodes(t *testing.T) {
	ret := toolx.NormalizeToolCodes([]string{
		" ",
		"graph/create_ticket_with_confirmation",
		"builtin/create_ticket_with_confirmation",
		"graph/handoff_to_human",
		"graph/handoff_to_human",
	})
	if len(ret) != 2 {
		t.Fatalf("expected 2 tool codes, got %d: %#v", len(ret), ret)
	}
	if ret[0] != "graph/create_ticket_with_confirmation" {
		t.Fatalf("unexpected first tool code: %s", ret[0])
	}
	if ret[1] != "graph/handoff_to_human" {
		t.Fatalf("unexpected second tool code: %s", ret[1])
	}
}

func TestToolCatalogResolveAllowedToolCodes(t *testing.T) {
	catalog := newToolCatalog()
	agent := models.AIAgent{
		AllowedMCPTools: `[{"toolCode":"graph/create_ticket_with_confirmation"},{"toolCode":"graph/handoff_to_human"}]`,
	}
	skill := &models.SkillDefinition{
		ToolWhitelist: `["builtin/create_ticket_with_confirmation","graph/prepare_ticket_draft"]`,
	}
	ret := catalog.resolveAllowedToolCodes(agent, skill)
	if len(ret) != 1 {
		t.Fatalf("expected 1 tool code, got %d: %#v", len(ret), ret)
	}
	if ret[0] != "graph/create_ticket_with_confirmation" {
		t.Fatalf("unexpected tool code: %s", ret[0])
	}
}

func TestToolCatalogResolveAllowedToolCodesFallsBackWhenSkillEmpty(t *testing.T) {
	catalog := newToolCatalog()
	agent := models.AIAgent{
		AllowedMCPTools: `[{"toolCode":"graph/create_ticket_with_confirmation"},{"toolCode":"graph/handoff_to_human"}]`,
	}
	ret := catalog.resolveAllowedToolCodes(agent, nil)
	if len(ret) != 2 {
		t.Fatalf("expected 2 tool codes, got %d: %#v", len(ret), ret)
	}
}

func TestBuildRuntimeStaticTools(t *testing.T) {
	ret := buildRuntimeStaticTools()
	if len(ret) != len(toolx.ListRuntimeStaticToolSpecs()) {
		t.Fatalf("expected %d runtime static tools, got %d", len(toolx.ListRuntimeStaticToolSpecs()), len(ret))
	}
}

func TestToolCatalogIncludesPublishedWorkflowGraphTools(t *testing.T) {
	setupWorkflowRuntimeTestDB(t)
	version := createWorkflowRuntimeTestVersion(t, dsl.Definition{
		SchemaVersion: 1,
		EntryNodeID:   "start",
		Nodes: []dsl.Node{
			{ID: "start", Type: workflowregistry.NodeTypeStart, Name: "Start"},
			{ID: "draft", Type: workflowregistry.NodeTypePrepareTicketDraft, Name: "Draft Ticket"},
			{ID: "create", Type: workflowregistry.NodeTypeCreateTicket, Name: "Create Ticket"},
			{ID: "handoff", Type: workflowregistry.NodeTypeHandoffToHuman, Name: "Handoff"},
		},
	})

	catalog := newToolCatalog()
	ret := catalog.parseAgentAllowedToolCodes(models.AIAgent{
		RuntimeMode:       enums.AIAgentRuntimeModeWorkflow,
		WorkflowVersionID: version.ID,
	})

	assertContainsToolCode(t, ret, toolx.GraphPrepareTicketDraft.Code)
	assertContainsToolCode(t, ret, toolx.GraphCreateTicketConfirm.Code)
	assertContainsToolCode(t, ret, toolx.GraphHandoffConversation.Code)
}

func TestApplyWorkflowInstructionAppendsPublishedWorkflow(t *testing.T) {
	setupWorkflowRuntimeTestDB(t)
	version := createWorkflowRuntimeTestVersion(t, dsl.Definition{
		SchemaVersion: 1,
		EntryNodeID:   "start",
		Nodes: []dsl.Node{
			{ID: "start", Type: workflowregistry.NodeTypeStart, Name: "Start"},
			{ID: "handoff", Type: workflowregistry.NodeTypeHandoffToHuman, Name: "Handoff"},
		},
	})

	agent := applyWorkflowInstruction(models.AIAgent{
		SystemPrompt:      "Base prompt.",
		RuntimeMode:       enums.AIAgentRuntimeModeWorkflow,
		WorkflowVersionID: version.ID,
	})
	if agent.SystemPrompt == "Base prompt." {
		t.Fatalf("expected workflow appendix to be appended")
	}
	if !strings.Contains(agent.SystemPrompt, "Published customer-service workflow") {
		t.Fatalf("missing workflow appendix: %s", agent.SystemPrompt)
	}
}

func setupWorkflowRuntimeTestDB(t *testing.T) {
	t.Helper()
	db, err := gorm.Open(sqlite.Open("file:"+t.Name()+"?mode=memory&cache=shared"), &gorm.Config{})
	if err != nil {
		t.Fatalf("open sqlite db: %v", err)
	}
	if err := db.AutoMigrate(&models.AIWorkflowVersion{}); err != nil {
		t.Fatalf("auto migrate: %v", err)
	}
	sqls.SetDB(db)
}

func createWorkflowRuntimeTestVersion(t *testing.T, def dsl.Definition) *models.AIWorkflowVersion {
	t.Helper()
	definition, err := json.Marshal(def)
	if err != nil {
		t.Fatalf("marshal definition: %v", err)
	}
	version := &models.AIWorkflowVersion{
		WorkflowID: 1,
		Version:    1,
		Status:     enums.StatusOk,
		Definition: string(definition),
	}
	if err := sqls.DB().Create(version).Error; err != nil {
		t.Fatalf("create workflow version: %v", err)
	}
	return version
}

func assertContainsToolCode(t *testing.T, items []string, want string) {
	t.Helper()
	for _, item := range items {
		if item == want {
			return
		}
	}
	t.Fatalf("expected tool code %s in %#v", want, items)
}