Issue resolution

// Define the interfaces

interface Customer {
    String getId();
    String getName();
    void raiseIssue(Issue issue);
}

interface SupportAgent {
    String getId();
    String getName();
    void resolveIssue(Issue issue);
}

interface Issue {
    String getId();
    String getDescription();
    String getStatus(); // e.g., "Open", "Resolved"
    void setStatus(String status);
}

interface IssueResolutionSystem {
    void addIssue(Issue issue);
    Issue getIssueById(String id);
    void assignIssueToAgent(Issue issue, SupportAgent agent);
    void resolveIssue(Issue issue);
}

// Implement the classes

class CustomerImpl implements Customer {
    private String id;
    private String name;

    public CustomerImpl(String id, String name) {
        this.id = id;
        this.name = name;
    }

    @Override
    public String getId() {
        return id;
    }

    @Override
    public String getName() {
        return name;
    }

    @Override
    public void raiseIssue(Issue issue) {
        System.out.println(name + " raised an issue: " + issue.getDescription());
    }
}

class SupportAgentImpl implements SupportAgent {
    private String id;
    private String name;

    public SupportAgentImpl(String id, String name) {
        this.id = id;
        this.name = name;
    }

    @Override
    public String getId() {
        return id;
    }

    @Override
    public String getName() {
        return name;
    }

    @Override
    public void resolveIssue(Issue issue) {
        issue.setStatus("Resolved");
        System.out.println(name + " resolved the issue: " + issue.getId());
    }
}

class IssueImpl implements Issue {
    private String id;
    private String description;
    private String status;

    public IssueImpl(String id, String description) {
        this.id = id;
        this.description = description;
        this.status = "Open";
    }

    @Override
    public String getId() {
        return id;
    }

    @Override
    public String getDescription() {
        return description;
    }

    @Override
    public String getStatus() {
        return status;
    }

    @Override
    public void setStatus(String status) {
        this.status = status;
    }
}

class IssueResolutionSystemImpl implements IssueResolutionSystem {
    private Map<String, Issue> issues = new HashMap<>();
    private Map<Issue, SupportAgent> issueAssignments = new HashMap<>();

    @Override
    public void addIssue(Issue issue) {
        issues.put(issue.getId(), issue);
    }

    @Override
    public Issue getIssueById(String id) {
        return issues.get(id);
    }

    @Override
    public void assignIssueToAgent(Issue issue, SupportAgent agent) {
        issueAssignments.put(issue, agent);
        System.out.println("Assigned issue " + issue.getId() + " to agent " + agent.getName());
    }

    @Override
    public void resolveIssue(Issue issue) {
        SupportAgent agent = issueAssignments.get(issue);
        if (agent != null) {
            agent.resolveIssue(issue);
        } else {
            System.out.println("No agent assigned to issue " + issue.getId());
        }
    }
}

// Example usage

public class Main {
    public static void main(String[] args) {
        Customer customer = new CustomerImpl("C1", "John Doe");
        SupportAgent agent = new SupportAgentImpl("A1", "Alice Smith");
        IssueResolutionSystem system = new IssueResolutionSystemImpl();

        Issue issue = new IssueImpl("I1", "Unable to access account");
        customer.raiseIssue(issue);
        system.addIssue(issue);
        system.assignIssueToAgent(issue, agent);
        system.resolveIssue(issue);
    }
}