package reminder

import (
	"testing"
	"time"

	"git.nakama.town/fmartingr/butterrobot/internal/model"
)

// MockCreator is a mock implementation of ReminderCreator for testing
type MockCreator struct {
	reminders []*model.Reminder
}

func (m *MockCreator) CreateReminder(platform, channelID, messageID, replyToID, userID, username, content string, triggerAt time.Time) (*model.Reminder, error) {
	reminder := &model.Reminder{
		ID:        int64(len(m.reminders) + 1),
		Platform:  platform,
		ChannelID: channelID,
		MessageID: messageID,
		ReplyToID: replyToID,
		UserID:    userID,
		Username:  username,
		Content:   content,
		TriggerAt: triggerAt,
	}
	m.reminders = append(m.reminders, reminder)
	return reminder, nil
}

func TestReminderOnMessage(t *testing.T) {
	creator := &MockCreator{reminders: make([]*model.Reminder, 0)}
	plugin := New(creator)

	tests := []struct {
		name           string
		message        *model.Message
		expectResponse bool
		expectReminder bool
	}{
		{
			name: "Valid reminder command - years",
			message: &model.Message{
				Text:    "!remindme 1y",
				ReplyTo: "original-message-id",
				Author:  "testuser",
				Channel: &model.Channel{Platform: "test"},
			},
			expectResponse: true,
			expectReminder: true,
		},
		{
			name: "Valid reminder command - months",
			message: &model.Message{
				Text:    "!remindme 3mo",
				ReplyTo: "original-message-id",
				Author:  "testuser",
				Channel: &model.Channel{Platform: "test"},
			},
			expectResponse: true,
			expectReminder: true,
		},
		{
			name: "Valid reminder command - days",
			message: &model.Message{
				Text:    "!remindme 2d",
				ReplyTo: "original-message-id",
				Author:  "testuser",
				Channel: &model.Channel{Platform: "test"},
			},
			expectResponse: true,
			expectReminder: true,
		},
		{
			name: "Valid reminder command - hours",
			message: &model.Message{
				Text:    "!remindme 5h",
				ReplyTo: "original-message-id",
				Author:  "testuser",
				Channel: &model.Channel{Platform: "test"},
			},
			expectResponse: true,
			expectReminder: true,
		},
		{
			name: "Valid reminder command - minutes",
			message: &model.Message{
				Text:    "!remindme 30m",
				ReplyTo: "original-message-id",
				Author:  "testuser",
				Channel: &model.Channel{Platform: "test"},
			},
			expectResponse: true,
			expectReminder: true,
		},
		{
			name: "Valid reminder command - seconds",
			message: &model.Message{
				Text:    "!remindme 60s",
				ReplyTo: "original-message-id",
				Author:  "testuser",
				Channel: &model.Channel{Platform: "test"},
			},
			expectResponse: true,
			expectReminder: true,
		},
		{
			name: "Not a reply",
			message: &model.Message{
				Text:    "!remindme 2d",
				ReplyTo: "",
				Author:  "testuser",
				Channel: &model.Channel{Platform: "test"},
			},
			expectResponse: false,
			expectReminder: false,
		},
		{
			name: "Not a reminder command",
			message: &model.Message{
				Text:    "hello world",
				ReplyTo: "original-message-id",
				Author:  "testuser",
				Channel: &model.Channel{Platform: "test"},
			},
			expectResponse: false,
			expectReminder: false,
		},
		{
			name: "Invalid duration format",
			message: &model.Message{
				Text:    "!remindme abc",
				ReplyTo: "original-message-id",
				Author:  "testuser",
				Channel: &model.Channel{Platform: "test"},
			},
			expectResponse: false,
			expectReminder: false,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			initialCount := len(creator.reminders)
			actions := plugin.OnMessage(tt.message, nil)

			if tt.expectResponse && len(actions) == 0 {
				t.Errorf("Expected response action, but got none")
			}

			if !tt.expectResponse && len(actions) > 0 {
				t.Errorf("Expected no actions, but got %d", len(actions))
			}

			// Verify action type is correct when actions are returned
			if len(actions) > 0 {
				if actions[0].Type != model.ActionSendMessage {
					t.Errorf("Expected action type to be %s, but got %s", model.ActionSendMessage, actions[0].Type)
				}
				
				if actions[0].Message == nil {
					t.Errorf("Expected message in action to not be nil")
				}
			}

			if tt.expectReminder && len(creator.reminders) != initialCount+1 {
				t.Errorf("Expected reminder to be created, but it wasn't")
			}

			if !tt.expectReminder && len(creator.reminders) != initialCount {
				t.Errorf("Expected no reminder to be created, but got %d", len(creator.reminders)-initialCount)
			}
		})
	}
}