package main

import (
	"testing"
	"time"
)

var testNow = time.Date(2026, 3, 23, 12, 0, 30, 0, time.UTC)

func TestDetectState_EndTurnText(t *testing.T) {
	msgs := []JSONLMessage{{
		Type:      "assistant",
		Timestamp: "2026-03-23T12:00:00Z",
		Message: &MessagePayload{
			Role:       "assistant",
			Content:    []ContentBlock{{Type: "text", Text: "Done."}},
			StopReason: "end_turn",
		},
	}}

	state := DetectState(msgs, testNow)
	if state != NeedsInput {
		t.Errorf("expected NeedsInput, got %v", state)
	}
}

func TestDetectState_ToolUseAskUser(t *testing.T) {
	msgs := []JSONLMessage{{
		Type:      "assistant",
		Timestamp: "2026-03-23T12:00:00Z",
		Message: &MessagePayload{
			Role: "assistant",
			Content: []ContentBlock{
				{Type: "text", Text: "Let me ask..."},
				{Type: "tool_use", Name: "AskUserQuestion"},
			},
			StopReason: "tool_use",
		},
	}}

	state := DetectState(msgs, testNow)
	if state != NeedsInput {
		t.Errorf("expected NeedsInput, got %v", state)
	}
}

func TestDetectState_ToolUseOther(t *testing.T) {
	msgs := []JSONLMessage{{
		Type:      "assistant",
		Timestamp: "2026-03-23T12:00:00Z",
		Message: &MessagePayload{
			Role: "assistant",
			Content: []ContentBlock{
				{Type: "tool_use", Name: "Read"},
			},
			StopReason: "tool_use",
		},
	}}

	state := DetectState(msgs, testNow)
	if state != Working {
		t.Errorf("expected Working, got %v", state)
	}
}

func TestDetectState_Progress(t *testing.T) {
	msgs := []JSONLMessage{{
		Type:      "progress",
		Timestamp: "2026-03-23T12:00:00Z",
		Data:      &ProgressData{Type: "agent_progress"},
	}}

	state := DetectState(msgs, testNow)
	if state != Working {
		t.Errorf("expected Working, got %v", state)
	}
}

func TestDetectState_ToolResult(t *testing.T) {
	msgs := []JSONLMessage{{
		Type:      "user",
		Timestamp: "2026-03-23T12:00:00Z",
		Message: &MessagePayload{
			Role:    "user",
			Content: []ContentBlock{{Type: "tool_result"}},
		},
	}}

	state := DetectState(msgs, testNow)
	if state != Working {
		t.Errorf("expected Working, got %v", state)
	}
}

func TestDetectState_IdleThreshold(t *testing.T) {
	// Message timestamp > 60s in the past
	msgs := []JSONLMessage{{
		Type:      "assistant",
		Timestamp: "2026-03-23T11:58:00Z", // 2min30s before testNow
		Message: &MessagePayload{
			Role:       "assistant",
			Content:    []ContentBlock{{Type: "text", Text: "Done."}},
			StopReason: "end_turn",
		},
	}}

	state := DetectState(msgs, testNow)
	if state != Idle {
		t.Errorf("expected Idle, got %v", state)
	}
}

func TestDetectState_EmptyMessages(t *testing.T) {
	state := DetectState(nil, testNow)
	if state != Unknown {
		t.Errorf("expected Unknown, got %v", state)
	}
}

func TestExtractPreview(t *testing.T) {
	msgs := []JSONLMessage{
		{
			Type: "user",
			Message: &MessagePayload{
				Role:    "user",
				Content: []ContentBlock{{Type: "text", Text: "do something"}},
			},
		},
		{
			Type: "assistant",
			Message: &MessagePayload{
				Role: "assistant",
				Content: []ContentBlock{{Type: "text", Text: "Voici le resultat\nLigne 2\nLigne 3\nLigne 4\nLigne 5"}},
			},
		},
	}

	preview := ExtractPreview(msgs)
	want := "Voici le resultat\nLigne 2\nLigne 3"
	if preview != want {
		t.Errorf("ExtractPreview = %q, want %q", preview, want)
	}
}

func TestExtractPreview_NoAssistant(t *testing.T) {
	msgs := []JSONLMessage{{
		Type: "user",
		Message: &MessagePayload{
			Role:    "user",
			Content: []ContentBlock{{Type: "text", Text: "hello"}},
		},
	}}

	preview := ExtractPreview(msgs)
	if preview != "" {
		t.Errorf("expected empty preview, got %q", preview)
	}
}

func TestExtractPreview_LongText(t *testing.T) {
	// Text longer than 200 chars should be truncated
	longText := ""
	for i := 0; i < 100; i++ {
		longText += "abcde "
	}

	msgs := []JSONLMessage{{
		Type: "assistant",
		Message: &MessagePayload{
			Role:    "assistant",
			Content: []ContentBlock{{Type: "text", Text: longText}},
		},
	}}

	preview := ExtractPreview(msgs)
	if len(preview) > 203 { // 200 + "..."
		t.Errorf("preview too long: %d chars", len(preview))
	}
	if preview[len(preview)-3:] != "..." {
		t.Errorf("expected truncation marker '...', got %q", preview[len(preview)-3:])
	}
}