package service

import (
	"context"
	"fmt"

	channelmodel "github.com/gochat/gochat/internal/model/channel"
	"github.com/gochat/gochat/internal/repository"
	applogger "github.com/gochat/gochat/pkg/logger"
)

// ChannelMicrosoftService implements business logic for Microsoft channel operations.
// This is a gochat addition — Chatwoot does not have a native Microsoft channel.
type ChannelMicrosoftService struct {
	repo *repository.ChannelMicrosoftRepo
}

// NewChannelMicrosoftService creates a new ChannelMicrosoft service.
func NewChannelMicrosoftService(repo *repository.ChannelMicrosoftRepo) *ChannelMicrosoftService {
	return &ChannelMicrosoftService{repo: repo}
}

// GetByID retrieves a Microsoft channel by ID.
func (s *ChannelMicrosoftService) GetByID(ctx context.Context, id uint) (*channelmodel.ChannelMicrosoft, error) {
	return s.repo.FindByID(ctx, id)
}

// GetByInboxID retrieves a Microsoft channel by inbox ID.
func (s *ChannelMicrosoftService) GetByInboxID(ctx context.Context, inboxID uint) (*channelmodel.ChannelMicrosoft, error) {
	return s.repo.FindByInboxID(ctx, inboxID)
}

// GetByAccountAndInboxID retrieves a Microsoft channel scoped to an account and inbox.
func (s *ChannelMicrosoftService) GetByAccountAndInboxID(ctx context.Context, accountID, inboxID uint) (*channelmodel.ChannelMicrosoft, error) {
	return s.repo.FindByAccountAndInboxID(ctx, accountID, inboxID)
}

// GetByMicrosoftUserID retrieves a Microsoft channel by Microsoft user ID.
func (s *ChannelMicrosoftService) GetByMicrosoftUserID(ctx context.Context, microsoftUserID string) (*channelmodel.ChannelMicrosoft, error) {
	return s.repo.FindByMicrosoftUserID(ctx, microsoftUserID)
}

// Create creates a new Microsoft channel record.
func (s *ChannelMicrosoftService) Create(ctx context.Context, ch *channelmodel.ChannelMicrosoft) error {
	if err := s.repo.Create(ctx, ch); err != nil {
		applogger.L().Errorf("Failed to create microsoft channel: %v", err)
		return fmt.Errorf("failed to create microsoft channel: %w", err)
	}
	applogger.L().Infof("Microsoft channel created (id=%d, inbox_id=%d)", ch.ID, ch.InboxID)
	return nil
}

// Update updates a Microsoft channel record.
func (s *ChannelMicrosoftService) Update(ctx context.Context, ch *channelmodel.ChannelMicrosoft) error {
	if err := s.repo.Update(ctx, ch); err != nil {
		applogger.L().Errorf("Failed to update microsoft channel: %v", err)
		return fmt.Errorf("failed to update microsoft channel: %w", err)
	}
	applogger.L().Infof("Microsoft channel updated (id=%d)", ch.ID)
	return nil
}

// Delete soft-deletes a Microsoft channel record.
func (s *ChannelMicrosoftService) Delete(ctx context.Context, id uint) error {
	if err := s.repo.Delete(ctx, id); err != nil {
		applogger.L().Errorf("Failed to delete microsoft channel: %v", err)
		return err
	}
	applogger.L().Infof("Microsoft channel deleted (id=%d)", id)
	return nil
}

// ListByAccount retrieves all Microsoft channels for an account.
func (s *ChannelMicrosoftService) ListByAccount(ctx context.Context, accountID uint) ([]channelmodel.ChannelMicrosoft, error) {
	return s.repo.ListByAccount(ctx, accountID)
}

// MarkReauthorizationRequired marks a Microsoft channel as needing reauthorization.
func (s *ChannelMicrosoftService) MarkReauthorizationRequired(ctx context.Context, inboxID uint) error {
	ch, err := s.repo.FindByInboxID(ctx, inboxID)
	if err != nil {
		return fmt.Errorf("microsoft channel not found: %w", err)
	}

	ch.ReauthorizationRequired = true
	if err := s.repo.Update(ctx, ch); err != nil {
		applogger.L().Errorf("Failed to mark microsoft channel for reauthorization: %v", err)
		return err
	}

	applogger.L().Infof("Microsoft channel marked for reauthorization (inbox_id=%d)", inboxID)
	return nil
}