package tools

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

	"github.com/modelcontextprotocol/go-sdk/mcp"

	"isphere-ai-bridge/internal/isphere"
)

func TestISphereSearchContactsToolReturnsJIDContacts(t *testing.T) {
	fake := &fakeReceiveMessagesSource{
		result: isphere.ReceiveMessagesResult{Messages: []isphere.Message{{
			ID:         "msg-1",
			SenderID:   "alice@imopenfire1-lanzhou",
			ReceiverID: "bob@imopenfire1-lanzhou",
		}}},
	}
	session, cleanup := connectToolsTestSession(t, func(server *mcp.Server) {
		RegisterISphereContactTools(server, fake)
	})
	defer cleanup()

	callResult, err := session.CallTool(context.Background(), &mcp.CallToolParams{
		Name:      ToolNameSearchContacts,
		Arguments: map[string]any{"query": "alice", "limit": 10},
	})
	if err != nil {
		t.Fatalf("call %s: %v", ToolNameSearchContacts, err)
	}
	if callResult.IsError {
		t.Fatalf("call result is error: %+v", callResult)
	}

	var decoded struct {
		OK       bool `json:"ok"`
		Contacts []struct {
			ContactID   string  `json:"contact_id"`
			DisplayName string  `json:"display_name"`
			Account     string  `json:"account"`
			Source      string  `json:"source"`
			Confidence  float64 `json:"confidence"`
			RawRef      string  `json:"raw_ref"`
		} `json:"contacts"`
		NextCursor any            `json:"next_cursor"`
		Audit      map[string]any `json:"audit"`
	}
	payload, err := json.Marshal(callResult.StructuredContent)
	if err != nil {
		t.Fatalf("marshal structured content: %v", err)
	}
	if err := json.Unmarshal(payload, &decoded); err != nil {
		t.Fatalf("decode structured content %s: %v", payload, err)
	}
	if !decoded.OK {
		t.Fatalf("ok = false in %s", payload)
	}
	if len(decoded.Contacts) != 1 {
		t.Fatalf("contacts = %+v, want one", decoded.Contacts)
	}
	contact := decoded.Contacts[0]
	if contact.ContactID != "alice@imopenfire1-lanzhou" || contact.DisplayName != "alice@imopenfire1-lanzhou" || contact.Account != "alice@imopenfire1-lanzhou" {
		t.Fatalf("unexpected contact identity: %+v", contact)
	}
	if contact.Source != "local_readonly" || contact.Confidence != 0.6 || contact.RawRef != "message_jid" {
		t.Fatalf("unexpected contact metadata: %+v", contact)
	}
	if decoded.Audit["tool"] != ToolNameSearchContacts || decoded.Audit["result"] != "ok" {
		t.Fatalf("audit = %+v", decoded.Audit)
	}
	if len(fake.queries) != 1 || fake.queries[0].Limit != 0 {
		t.Fatalf("source queries = %+v, want one unbounded receive query", fake.queries)
	}
}

func TestISphereSearchContactsToolValidatesContractArgs(t *testing.T) {
	fake := &fakeReceiveMessagesSource{
		result: isphere.ReceiveMessagesResult{Messages: []isphere.Message{{
			ID:         "msg-1",
			SenderID:   "alice@imopenfire1-lanzhou",
			ReceiverID: "bob@imopenfire1-lanzhou",
		}}},
	}
	session, cleanup := connectToolsTestSession(t, func(server *mcp.Server) {
		RegisterISphereContactTools(server, fake)
	})
	defer cleanup()

	callResult, err := session.CallTool(context.Background(), &mcp.CallToolParams{
		Name: ToolNameSearchContacts,
		Arguments: map[string]any{
			"query":             "alice",
			"source_preference": "local_readonly",
			"include_inactive":  true,
			"cursor":            "",
			"limit":             10,
		},
	})
	if err != nil {
		t.Fatalf("call with safe contract args: %v", err)
	}
	if callResult.IsError {
		t.Fatalf("call result is error: %+v", callResult)
	}

	bridgeResult, err := session.CallTool(context.Background(), &mcp.CallToolParams{
		Name:      ToolNameSearchContacts,
		Arguments: map[string]any{"query": "alice", "source_preference": "bridge"},
	})
	if err == nil && !bridgeResult.IsError {
		t.Fatalf("bridge source_preference was accepted before connector exists")
	}

	cursorResult, err := session.CallTool(context.Background(), &mcp.CallToolParams{
		Name:      ToolNameSearchContacts,
		Arguments: map[string]any{"query": "alice", "cursor": "next-page"},
	})
	if err == nil && !cursorResult.IsError {
		t.Fatalf("non-empty cursor was accepted before pagination exists")
	}
}