package storage

import (
	"fmt"
	"strings"
	"sync"

	"git.coopgo.io/coopgo-platform/solidarity-transport/types"
	"github.com/google/uuid"
	"github.com/spf13/viper"
)

// MockStorage implements the Storage interface for testing purposes
type MockStorage struct {
	config                *viper.Viper
	mu                    sync.RWMutex
	availabilities        map[string]*types.DriverRegularAvailability
	journeys              map[string]*types.DriverJourney
	bookings              map[string]*types.Booking
	availabilitiesByDriver map[string][]*types.DriverRegularAvailability
}

// NewMockStorage creates a new mock storage instance
func NewMockStorage(cfg *viper.Viper) Storage {
	return &MockStorage{
		config:                 cfg,
		availabilities:         make(map[string]*types.DriverRegularAvailability),
		journeys:               make(map[string]*types.DriverJourney),
		bookings:               make(map[string]*types.Booking),
		availabilitiesByDriver: make(map[string][]*types.DriverRegularAvailability),
	}
}

// Driver Regular Availability methods

func (m *MockStorage) CreateDriverRegularAvailability(availability types.DriverRegularAvailability) error {
	m.mu.Lock()
	defer m.mu.Unlock()

	if availability.ID == "" {
		availability.ID = uuid.New().String()
	}

	m.availabilities[availability.ID] = &availability

	// Update driver index
	m.availabilitiesByDriver[availability.DriverId] = append(
		m.availabilitiesByDriver[availability.DriverId],
		&availability,
	)

	return nil
}

func (m *MockStorage) CreateDriverRegularAvailabilities(availabilities []*types.DriverRegularAvailability) error {
	for _, availability := range availabilities {
		if err := m.CreateDriverRegularAvailability(*availability); err != nil {
			return err
		}
	}
	return nil
}

func (m *MockStorage) DeleteDriverRegularAvailability(driverid string, availabilityid string) error {
	m.mu.Lock()
	defer m.mu.Unlock()

	availability, exists := m.availabilities[availabilityid]
	if !exists {
		return fmt.Errorf("availability %s not found", availabilityid)
	}

	if availability.DriverId != driverid {
		return fmt.Errorf("availability %s does not belong to driver %s", availabilityid, driverid)
	}

	delete(m.availabilities, availabilityid)

	// Update driver index
	driverAvailabilities := m.availabilitiesByDriver[driverid]
	for i, a := range driverAvailabilities {
		if a.ID == availabilityid {
			m.availabilitiesByDriver[driverid] = append(driverAvailabilities[:i], driverAvailabilities[i+1:]...)
			break
		}
	}

	return nil
}

func (m *MockStorage) GetDriverRegularAvailability(driverid string, availabilityid string) (*types.DriverRegularAvailability, error) {
	m.mu.RLock()
	defer m.mu.RUnlock()

	availability, exists := m.availabilities[availabilityid]
	if !exists {
		return nil, fmt.Errorf("availability %s not found", availabilityid)
	}

	if availability.DriverId != driverid {
		return nil, fmt.Errorf("availability %s does not belong to driver %s", availabilityid, driverid)
	}

	return availability, nil
}

func (m *MockStorage) GetDriverRegularAvailabilities(driverid string) ([]*types.DriverRegularAvailability, error) {
	m.mu.RLock()
	defer m.mu.RUnlock()

	return m.availabilitiesByDriver[driverid], nil
}

func (m *MockStorage) GetRegularAvailabilities(day int, timeInDay string) ([]*types.DriverRegularAvailability, error) {
	m.mu.RLock()
	defer m.mu.RUnlock()

	var result []*types.DriverRegularAvailability

	for _, availability := range m.availabilities {
		// Match day
		if availability.Day != day {
			continue
		}

		// For testing, just return all availabilities for the day
		// Let the handler do the time filtering logic
		result = append(result, availability)
	}

	return result, nil
}

// timeMatches is a simple time matching function for testing
func (m *MockStorage) timeMatches(availabilityTime, requestedTime string) bool {
	// Simple string matching for testing - real implementation would parse times
	return strings.HasPrefix(availabilityTime, requestedTime[:2]) // Match hour
}

// Driver Journey methods

func (m *MockStorage) PushDriverJourneys(journeys []*types.DriverJourney) error {
	m.mu.Lock()
	defer m.mu.Unlock()

	for _, journey := range journeys {
		if journey.Id == "" {
			journey.Id = uuid.New().String()
		}
		m.journeys[journey.Id] = journey
	}

	return nil
}

func (m *MockStorage) GetDriverJourney(id string) (*types.DriverJourney, error) {
	m.mu.RLock()
	defer m.mu.RUnlock()

	journey, exists := m.journeys[id]
	if !exists {
		return nil, fmt.Errorf("journey %s not found", id)
	}

	return journey, nil
}

func (m *MockStorage) UpdateDriverJourney(journey types.DriverJourney) error {
	m.mu.Lock()
	defer m.mu.Unlock()

	if _, exists := m.journeys[journey.Id]; !exists {
		return fmt.Errorf("journey %s not found", journey.Id)
	}

	m.journeys[journey.Id] = &journey
	return nil
}

// Booking methods

func (m *MockStorage) CreateBooking(booking types.Booking) error {
	m.mu.Lock()
	defer m.mu.Unlock()

	if booking.Id == "" {
		booking.Id = uuid.New().String()
	}

	m.bookings[booking.Id] = &booking
	return nil
}

func (m *MockStorage) GetAllBookings() ([]*types.Booking, error) {
	m.mu.RLock()
	defer m.mu.RUnlock()

	var result []*types.Booking
	for _, booking := range m.bookings {
		result = append(result, booking)
	}

	return result, nil
}

func (m *MockStorage) GetBooking(id string) (*types.Booking, error) {
	m.mu.RLock()
	defer m.mu.RUnlock()

	booking, exists := m.bookings[id]
	if !exists {
		return nil, fmt.Errorf("booking %s not found", id)
	}

	return booking, nil
}

func (m *MockStorage) UpdateBooking(booking types.Booking) error {
	m.mu.Lock()
	defer m.mu.Unlock()

	if _, exists := m.bookings[booking.Id]; !exists {
		return fmt.Errorf("booking %s not found", booking.Id)
	}

	m.bookings[booking.Id] = &booking
	return nil
}

func (m *MockStorage) UpdateBookingStatus(bookingid string, newStatus string, reason string) error {
	m.mu.Lock()
	defer m.mu.Unlock()

	booking, exists := m.bookings[bookingid]
	if !exists {
		return fmt.Errorf("booking %s not found", bookingid)
	}

	booking.Status = newStatus
	// In a real implementation, we might store the reason in a separate field
	return nil
}

// Helper methods for testing

// Reset clears all data - useful for test setup
func (m *MockStorage) Reset() {
	m.mu.Lock()
	defer m.mu.Unlock()

	m.availabilities = make(map[string]*types.DriverRegularAvailability)
	m.journeys = make(map[string]*types.DriverJourney)
	m.bookings = make(map[string]*types.Booking)
	m.availabilitiesByDriver = make(map[string][]*types.DriverRegularAvailability)
}

// GetAllJourneys returns all stored journeys - useful for testing
func (m *MockStorage) GetAllJourneys() []*types.DriverJourney {
	m.mu.RLock()
	defer m.mu.RUnlock()

	var result []*types.DriverJourney
	for _, journey := range m.journeys {
		result = append(result, journey)
	}
	return result
}

// GetAllAvailabilities returns all stored availabilities - useful for testing
func (m *MockStorage) GetAllAvailabilities() []*types.DriverRegularAvailability {
	m.mu.RLock()
	defer m.mu.RUnlock()

	var result []*types.DriverRegularAvailability
	for _, availability := range m.availabilities {
		result = append(result, availability)
	}
	return result
}