package providers

import (
	"strings"
	"testing"
)

func TestMapChatCompletionResponse_CompatFunctionCallXML(t *testing.T) {
	raw := []byte(`{
		"choices":[
			{
				"finish_reason":"stop",
				"message":{
					"content":"I need to check the current state and understand what was last worked on before proceeding.\n\n<function_call><invoke><toolname>exec</toolname><parameters><command>cd /root/clawgo && git status</command></parameters></invoke></function_call>\n\n<function_call><invoke><tool_name>read_file</tool_name><parameters><path>/root/.clawgo/workspace/memory/MEMORY.md</path></parameters></invoke></function_call>"
				}
			}
		]
	}`)
	resp, err := parseChatCompletionsResponse(raw)
	if err != nil {
		t.Fatalf("parseChatCompletionsResponse error: %v", err)
	}

	if resp == nil {
		t.Fatalf("expected response")
	}
	if len(resp.ToolCalls) != 2 {
		t.Fatalf("expected 2 tool calls, got %d", len(resp.ToolCalls))
	}

	if resp.ToolCalls[0].Name != "exec" {
		t.Fatalf("expected first tool exec, got %q", resp.ToolCalls[0].Name)
	}
	if got, ok := resp.ToolCalls[0].Arguments["command"].(string); !ok || got == "" {
		t.Fatalf("expected first tool command arg, got %#v", resp.ToolCalls[0].Arguments)
	}

	if resp.ToolCalls[1].Name != "read_file" {
		t.Fatalf("expected second tool read_file, got %q", resp.ToolCalls[1].Name)
	}
	if got, ok := resp.ToolCalls[1].Arguments["path"].(string); !ok || got == "" {
		t.Fatalf("expected second tool path arg, got %#v", resp.ToolCalls[1].Arguments)
	}

	if resp.Content == "" {
		t.Fatalf("expected non-empty cleaned content")
	}
	if containsFunctionCallMarkup(resp.Content) {
		t.Fatalf("expected function call markup removed from content, got %q", resp.Content)
	}
}

func TestNormalizeAPIBase_CompatibilityPaths(t *testing.T) {
	tests := []struct {
		in   string
		want string
	}{
		{"http://localhost:8080/v1/chat/completions", "http://localhost:8080/v1/chat/completions"},
		{"http://localhost:8080/v1/responses", "http://localhost:8080/v1/responses"},
		{"http://localhost:8080/v1", "http://localhost:8080/v1"},
		{"http://localhost:8080/v1/", "http://localhost:8080/v1"},
	}

	for _, tt := range tests {
		got := normalizeAPIBase(tt.in)
		if got != tt.want {
			t.Fatalf("normalizeAPIBase(%q) = %q, want %q", tt.in, got, tt.want)
		}
	}
}

func TestNormalizeProtocol(t *testing.T) {
	tests := []struct {
		in   string
		want string
	}{
		{"", ProtocolChatCompletions},
		{"chat_completions", ProtocolChatCompletions},
		{"responses", ProtocolResponses},
		{"invalid", ProtocolChatCompletions},
	}

	for _, tt := range tests {
		got := normalizeProtocol(tt.in)
		if got != tt.want {
			t.Fatalf("normalizeProtocol(%q) = %q, want %q", tt.in, got, tt.want)
		}
	}
}

func TestParseCompatFunctionCalls_NoMarkup(t *testing.T) {
	calls, cleaned := parseCompatFunctionCalls("hello")
	if len(calls) != 0 {
		t.Fatalf("expected 0 calls, got %d", len(calls))
	}
	if cleaned != "hello" {
		t.Fatalf("expected content unchanged, got %q", cleaned)
	}
}

func TestEndpointForResponsesCompact(t *testing.T) {
	tests := []struct {
		base     string
		relative string
		want     string
	}{
		{"http://localhost:8080/v1", "/responses/compact", "http://localhost:8080/v1/responses/compact"},
		{"http://localhost:8080/v1/responses", "/responses/compact", "http://localhost:8080/v1/responses/compact"},
		{"http://localhost:8080/v1/responses/compact", "/responses", "http://localhost:8080/v1/responses"},
		{"http://localhost:8080/v1/responses/compact", "/responses/compact", "http://localhost:8080/v1/responses/compact"},
	}
	for _, tt := range tests {
		got := endpointFor(tt.base, tt.relative)
		if got != tt.want {
			t.Fatalf("endpointFor(%q, %q) = %q, want %q", tt.base, tt.relative, got, tt.want)
		}
	}
}

func TestToResponsesInputItems_AssistantUsesOutputText(t *testing.T) {
	items := toResponsesInputItems(Message{
		Role:    "assistant",
		Content: "hello",
	})
	if len(items) != 1 {
		t.Fatalf("expected 1 item, got %d", len(items))
	}
	content, ok := items[0]["content"].([]map[string]interface{})
	if !ok || len(content) == 0 {
		t.Fatalf("unexpected content shape: %#v", items[0]["content"])
	}
	gotType, _ := content[0]["type"].(string)
	if gotType != "output_text" {
		t.Fatalf("assistant content type = %q, want output_text", gotType)
	}
}

func TestToResponsesInputItems_AssistantPreservesToolCalls(t *testing.T) {
	items := toResponsesInputItems(Message{
		Role:    "assistant",
		Content: "",
		ToolCalls: []ToolCall{
			{
				ID:   "call_abc",
				Name: "exec_command",
				Arguments: map[string]interface{}{
					"cmd": "pwd",
				},
			},
		},
	})
	if len(items) != 1 {
		t.Fatalf("expected 1 item, got %d", len(items))
	}
	gotType, _ := items[0]["type"].(string)
	if gotType != "function_call" {
		t.Fatalf("item type = %q, want function_call", gotType)
	}
	gotCallID, _ := items[0]["call_id"].(string)
	if gotCallID != "call_abc" {
		t.Fatalf("call_id = %q, want call_abc", gotCallID)
	}
	gotName, _ := items[0]["name"].(string)
	if gotName != "exec_command" {
		t.Fatalf("name = %q, want exec_command", gotName)
	}
	gotArgs, _ := items[0]["arguments"].(string)
	if !strings.Contains(gotArgs, "\"cmd\":\"pwd\"") {
		t.Fatalf("arguments = %q, want serialized cmd", gotArgs)
	}
}

func containsFunctionCallMarkup(s string) bool {
	return len(s) > 0 && (strings.Contains(s, "<function_call>") || strings.Contains(s, "</function_call>"))
}