package main

import (
	"context"
	"errors"
)

var ErrUserExists = errors.New("user already exists")
var ErrUserNotFound = errors.New("user not found")

// mockRepo implements ChatRepositoryAPI for auth tests
// Only implements methods needed for auth

type mockRepo struct {
	users map[string]string // username: passwordHash
}

func (m *mockRepo) CountUsers(ctx context.Context) (int, error) {
	return len(m.users), nil
}
func (m *mockRepo) CreateUser(ctx context.Context, username, passwordHash string) error {
	if _, exists := m.users[username]; exists {
		return ErrUserExists
	}
	m.users[username] = passwordHash
	return nil
}
func (m *mockRepo) GetUserByUsername(ctx context.Context, username string) (*User, error) {
	hash, ok := m.users[username]
	if !ok {
		return nil, ErrUserNotFound
	}
	return &User{Username: username, PasswordHash: hash}, nil
}

// Add stubs for all ChatRepositoryAPI methods not used in tests
func (m *mockRepo) SaveChatInteraction(ctx context.Context, rec ChatInteraction) error { return nil }
func (m *mockRepo) ListChatInteractions(ctx context.Context, limit, offset int) ([]ChatInteraction, error) {
	return nil, nil
}
func (m *mockRepo) SaveLLMRawEvent(ctx context.Context, correlationID, phase, raw string) error {
	return nil
}
func (m *mockRepo) ListLLMRawEvents(ctx context.Context, correlationID string, limit, offset int) ([]RawLLMEvent, error) {
	return nil, nil
}
func (m *mockRepo) SaveKnowledgeModel(ctx context.Context, text string) error { return nil }
func (m *mockRepo) ListKnowledgeModels(ctx context.Context, limit, offset int) ([]knowledgeModelMeta, error) {
	return nil, nil
}
func (m *mockRepo) GetKnowledgeModelText(ctx context.Context, id int64) (string, error) {
	return "", nil
}