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package executor

import (
	"bytes"
	"testing"

	"github.com/tidwall/gjson"
)

func TestApplyClaudeToolPrefix(t *testing.T) {
	input := []byte(`{"tools":[{"name":"alpha"},{"name":"proxy_bravo"}],"tool_choice":{"type":"tool","name":"charlie"},"messages":[{"role":"assistant","content":[{"type":"tool_use","name":"delta","id":"t1","input":{}}]}]}`)
	out := applyClaudeToolPrefix(input, "proxy_")

	if got := gjson.GetBytes(out, "tools.0.name").String(); got != "proxy_alpha" {
		t.Fatalf("tools.0.name = %q, want %q", got, "proxy_alpha")
	}
	if got := gjson.GetBytes(out, "tools.1.name").String(); got != "proxy_bravo" {
		t.Fatalf("tools.1.name = %q, want %q", got, "proxy_bravo")
	}
	if got := gjson.GetBytes(out, "tool_choice.name").String(); got != "proxy_charlie" {
		t.Fatalf("tool_choice.name = %q, want %q", got, "proxy_charlie")
	}
	if got := gjson.GetBytes(out, "messages.0.content.0.name").String(); got != "proxy_delta" {
		t.Fatalf("messages.0.content.0.name = %q, want %q", got, "proxy_delta")
	}
}

func TestApplyClaudeToolPrefix_SkipsBuiltinTools(t *testing.T) {
	input := []byte(`{"tools":[{"type":"web_search_20250305","name":"web_search"},{"name":"my_custom_tool","input_schema":{"type":"object"}}]}`)
	out := applyClaudeToolPrefix(input, "proxy_")

	if got := gjson.GetBytes(out, "tools.0.name").String(); got != "web_search" {
		t.Fatalf("built-in tool name should not be prefixed: tools.0.name = %q, want %q", got, "web_search")
	}
	if got := gjson.GetBytes(out, "tools.1.name").String(); got != "proxy_my_custom_tool" {
		t.Fatalf("custom tool should be prefixed: tools.1.name = %q, want %q", got, "proxy_my_custom_tool")
	}
}

func TestStripClaudeToolPrefixFromResponse(t *testing.T) {
	input := []byte(`{"content":[{"type":"tool_use","name":"proxy_alpha","id":"t1","input":{}},{"type":"tool_use","name":"bravo","id":"t2","input":{}}]}`)
	out := stripClaudeToolPrefixFromResponse(input, "proxy_")

	if got := gjson.GetBytes(out, "content.0.name").String(); got != "alpha" {
		t.Fatalf("content.0.name = %q, want %q", got, "alpha")
	}
	if got := gjson.GetBytes(out, "content.1.name").String(); got != "bravo" {
		t.Fatalf("content.1.name = %q, want %q", got, "bravo")
	}
}

func TestStripClaudeToolPrefixFromStreamLine(t *testing.T) {
	line := []byte(`data: {"type":"content_block_start","content_block":{"type":"tool_use","name":"proxy_alpha","id":"t1"},"index":0}`)
	out := stripClaudeToolPrefixFromStreamLine(line, "proxy_")

	payload := bytes.TrimSpace(out)
	if bytes.HasPrefix(payload, []byte("data:")) {
		payload = bytes.TrimSpace(payload[len("data:"):])
	}
	if got := gjson.GetBytes(payload, "content_block.name").String(); got != "alpha" {
		t.Fatalf("content_block.name = %q, want %q", got, "alpha")
	}
}