package openai

import (
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func TestCollectStreamFunctionCallNamesDedupesSameIndex(t *testing.T) {
	seen := make(map[string]struct{})
	var names []string

	chunks := []string{
		`{"choices":[{"index":0,"delta":{"tool_calls":[{"index":0,"id":"c1","type":"function","function":{"name":"get_weather","arguments":""}}]}}]}`,
		`{"choices":[{"index":0,"delta":{"tool_calls":[{"index":0,"function":{"arguments":"{\"q\":"}}]}}]}`,
		`{"choices":[{"index":0,"delta":{"tool_calls":[{"index":0,"function":{"arguments":"\"x\"}"}}]}}]}`,
		`{"choices":[{"index":0,"delta":{"tool_calls":[{"index":1,"id":"c2","type":"function","function":{"name":"get_time","arguments":""}}]}}]}`,
		`{"choices":[{"index":0,"delta":{"tool_calls":[{"index":1,"function":{"arguments":"{}"}}]}}]}`,
	}
	for _, chunk := range chunks {
		collectStreamFunctionCallNames(chunk, seen, &names)
	}

	require.Len(t, names, 2)
	assert.Equal(t, []string{"get_weather", "get_time"}, names)
}