package memory

import (
	"context"
	"fmt"
	"time"

	"github.com/bridge/ai-customer-service/internal/domain/error/cserrors"
	"github.com/bridge/ai-customer-service/internal/domain/ticket"
)

func (s *TicketStore) ListOpen(_ context.Context, limit int) ([]ticket.Ticket, error) {
	s.mu.RLock()
	defer s.mu.RUnlock()
	if limit <= 0 || limit > len(s.tickets) {
		limit = len(s.tickets)
	}
	items := make([]ticket.Ticket, 0, limit)
	for _, item := range s.tickets {
		if item.Status == ticket.StatusOpen || item.Status == ticket.StatusAssigned || item.Status == ticket.StatusProcessing {
			items = append(items, item)
			if len(items) == limit {
				break
			}
		}
	}
	return items, nil
}

func (s *TicketStore) Assign(_ context.Context, ticketID, agentID, _, _ string, now time.Time) error {
	s.mu.Lock()
	defer s.mu.Unlock()
	for i := range s.tickets {
		if s.tickets[i].ID != ticketID {
			continue
		}
		if s.tickets[i].Status != ticket.StatusOpen {
			return fmt.Errorf("%s:%s", cserrors.CS_TKT_4002, cserrors.ErrorMsg(cserrors.CS_TKT_4002))
		}
		s.tickets[i].AssignedTo = agentID
		s.tickets[i].Status = ticket.StatusAssigned
		s.tickets[i].UpdatedAt = now
		return nil
	}
	return fmt.Errorf("%s:%s", cserrors.CS_TICKET_4001, cserrors.ErrorMsg(cserrors.CS_TICKET_4001))
}

func (s *TicketStore) Resolve(_ context.Context, ticketID, resolution, _, _ string, now time.Time) error {
	s.mu.Lock()
	defer s.mu.Unlock()
	for i := range s.tickets {
		if s.tickets[i].ID != ticketID {
			continue
		}
		if s.tickets[i].Status != ticket.StatusAssigned && s.tickets[i].Status != ticket.StatusProcessing {
			return fmt.Errorf("%s:%s", cserrors.CS_TICKET_4092, cserrors.ErrorMsg(cserrors.CS_TICKET_4092))
		}
		resolvedAt := now
		s.tickets[i].Resolution = resolution
		s.tickets[i].Status = ticket.StatusResolved
		s.tickets[i].ResolvedAt = &resolvedAt
		s.tickets[i].UpdatedAt = now
		return nil
	}
	return fmt.Errorf("%s:%s", cserrors.CS_TICKET_4001, cserrors.ErrorMsg(cserrors.CS_TICKET_4001))
}

func (s *TicketStore) Close(_ context.Context, ticketID, resolution, _, _ string, now time.Time) error {
	s.mu.Lock()
	defer s.mu.Unlock()
	for i := range s.tickets {
		if s.tickets[i].ID != ticketID {
			continue
		}
		if s.tickets[i].Status != ticket.StatusResolved {
			return fmt.Errorf("%s:%s", cserrors.CS_TICKET_4093, cserrors.ErrorMsg(cserrors.CS_TICKET_4093))
		}
		resolvedAt := now
		s.tickets[i].Resolution = resolution
		s.tickets[i].Status = ticket.StatusClosed
		if s.tickets[i].ResolvedAt == nil {
			s.tickets[i].ResolvedAt = &resolvedAt
		}
		s.tickets[i].UpdatedAt = now
		return nil
	}
	return fmt.Errorf("%s:%s", cserrors.CS_TICKET_4001, cserrors.ErrorMsg(cserrors.CS_TICKET_4001))
}