package server

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

	agentcommand "git-ssh.u1680832.nyat.app/weichen/Agent-Command.git"
	"git-ssh.u1680832.nyat.app/weichen/Agent-System-Backend.git/internal/cmdbus"
	"git-ssh.u1680832.nyat.app/weichen/Agent-System-Backend.git/internal/intentgate"
	"git-ssh.u1680832.nyat.app/weichen/Agent-System-Backend.git/internal/runtime"
	"git-ssh.u1680832.nyat.app/weichen/Agent-System-Backend.git/internal/settings"
	"git-ssh.u1680832.nyat.app/weichen/Agent-System-Backend.git/internal/store"
	"git-ssh.u1680832.nyat.app/weichen/Agent-System-Backend.git/internal/workflow"
	core "git-ssh.u1680832.nyat.app/weichen/Agent-System-Core.git"
)

type routeCapture struct {
	ch chan workflow.Launch
}

func (c routeCapture) Name() string { return "route-capture" }

func (c routeCapture) Execute(rc runtime.RunCtx) error {
	src, _ := rc.(interface {
		Workflow() (workflow.Launch, bool)
	})
	if src == nil {
		return nil
	}
	if launch, ok := src.Workflow(); ok {
		c.ch <- launch
	}
	return nil
}

func TestCommandBusBeatsWorkflow(t *testing.T) {
	srv, st := newTestServer(t)
	if err := st.MergeSettingsScope(store.OwnerDefault, settings.ScopeUser, map[string]any{"runtime": map[string]any{"mock": false}}); err != nil {
		t.Fatal(err)
	}
	ch := make(chan workflow.Launch, 1)
	srv.mgr.SetWorkflowRunner(routeCapture{ch})
	gate := intentgate.New()
	if err := gate.Rebuild(context.Background(), []json.RawMessage{briefIntent()}); err != nil {
		t.Fatal(err)
	}
	srv.Gate = gate
	reg := workflow.NewRegistry()
	reg.Set([]core.WorkflowDef{{
		ID: "demo.brief", Title: "简报", IntentID: "demo.brief",
		Steps: []core.WorkflowStep{{ID: "s", Kind: "hitl"}},
	}}, nil)
	srv.Workflows = reg
	if err := srv.Bus.RegisterBuiltin(agentcommand.CommandSpec{ID: "demo.brief", Title: "简报命令"}, "", func(context.Context, cmdbus.Request) (any, error) {
		return map[string]any{"ok": true}, nil
	}); err != nil {
		t.Fatal(err)
	}
	_, convID := setupConversation(t, srv.Handler())
	code, out := doJSON(t, srv.Handler(), "POST", "/api/conversations/"+convID+"/messages", map[string]any{"text": "写一份简报"})
	if code != 200 || out["command"] != "demo.brief" {
		t.Fatalf("status %d body %v", code, out)
	}
	if _, ok := out["run"]; ok {
		t.Fatal("a command hit must not start a workflow run")
	}
	select {
	case <-ch:
		t.Fatal("workflow runner started for a command")
	default:
	}
}

func TestIntentStartsWorkflowRun(t *testing.T) {
	srv, st := newTestServer(t)
	if err := st.MergeSettingsScope(store.OwnerDefault, settings.ScopeUser, map[string]any{"runtime": map[string]any{"mock": false}}); err != nil {
		t.Fatal(err)
	}
	ch := make(chan workflow.Launch, 1)
	srv.mgr.SetWorkflowRunner(routeCapture{ch})
	gate := intentgate.New()
	if err := gate.Rebuild(context.Background(), []json.RawMessage{briefIntent()}); err != nil {
		t.Fatal(err)
	}
	srv.Gate = gate
	reg := workflow.NewRegistry()
	reg.Set([]core.WorkflowDef{{
		ID: "demo.brief", Title: "简报", IntentID: "demo.brief",
		Steps: []core.WorkflowStep{{ID: "s", Kind: "hitl"}},
	}}, nil)
	srv.Workflows = reg
	_, convID := setupConversation(t, srv.Handler())
	code, out := doJSON(t, srv.Handler(), "POST", "/api/conversations/"+convID+"/messages", map[string]any{"text": "写一份简报"})
	if code != 200 || out["run"] == nil {
		t.Fatalf("status %d body %v", code, out)
	}
	select {
	case launch := <-ch:
		if launch.Def.ID != "demo.brief" || len(launch.Missing) != 1 || launch.Missing[0].Question != "主题是什么？" {
			t.Fatalf("%+v", launch)
		}
	case <-time.After(time.Second):
		t.Fatal("workflow runner was not selected")
	}
}

func TestWorkflowRouteClaimsBeforePersist(t *testing.T) {
	srv, st := newTestServer(t)
	if err := st.MergeSettingsScope(store.OwnerDefault, settings.ScopeUser, map[string]any{"runtime": map[string]any{"mock": false}}); err != nil {
		t.Fatal(err)
	}
	gate := intentgate.New()
	if err := gate.Rebuild(context.Background(), []json.RawMessage{briefIntent()}); err != nil {
		t.Fatal(err)
	}
	srv.Gate = gate
	reg := workflow.NewRegistry()
	reg.Set([]core.WorkflowDef{{
		ID: "demo.brief", Title: "简报", IntentID: "demo.brief",
		Steps: []core.WorkflowStep{{ID: "s", Kind: "hitl"}},
	}}, nil)
	srv.Workflows = reg
	_, convID := setupConversation(t, srv.Handler())
	conv, err := st.GetConversation(store.OwnerDefault, convID)
	if err != nil {
		t.Fatal(err)
	}
	if err := srv.mgr.ClaimConversation(convID); err != nil {
		t.Fatal(err)
	}
	before, err := st.ListMessages(convID)
	if err != nil {
		t.Fatal(err)
	}
	code, out := doJSON(t, srv.Handler(), "POST", "/api/conversations/"+convID+"/messages", map[string]any{"text": "写一份简报"})
	if code != 409 {
		t.Fatalf("status %d body %v", code, out)
	}
	after, err := st.ListMessages(convID)
	if err != nil {
		t.Fatal(err)
	}
	if len(after) != len(before) {
		t.Fatalf("workflow route wrote a message while busy")
	}
	srv.mgr.ReleaseConversation(conv.ID)
}

func briefIntent() json.RawMessage {
	return json.RawMessage(`{"id":"demo.brief","domain":"demo","version":1,"matcher":{"includes_any":["简报"]},"slots":[{"key":"topic","required":true,"pattern":"主题[:：]\\s*(\\S+)","question":"主题是什么？"}]}`)
}