package de.fred4jupiter.fredbet.domain;

import de.fred4jupiter.fredbet.props.FredbetConstants;
import de.fred4jupiter.fredbet.security.FredBetUserGroup;
import org.apache.commons.lang3.builder.EqualsBuilder;
import org.apache.commons.lang3.builder.HashCodeBuilder;
import org.apache.commons.lang3.builder.ToStringBuilder;
import org.apache.commons.lang3.builder.ToStringStyle;
import org.springframework.data.annotation.PersistenceConstructor;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.util.CollectionUtils;

import javax.persistence.*;
import java.time.LocalDateTime;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import java.util.stream.Collectors;

/**
 * @author michael
 */
@Entity
@Table(name = "APP_USER")
public class AppUser implements UserDetails {

    private static final long serialVersionUID = -2973861561213230375L;

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "USER_ID")
    private Long id;

    @ElementCollection(fetch = FetchType.EAGER)
    @CollectionTable(name = "USER_ROLES", joinColumns = @JoinColumn(name = "USER_ID"))
    @Column(name = "ROLE")
    private Set<String> roles;

    @Column(name = "USER_NAME", unique = true)
    private String username;

    @Column(name = "PASSWORD")
    private String password;

    @Column(name = "CREATED_AT")
    private LocalDateTime createdAt;

    @Column(name = "LAST_LOGIN")
    private LocalDateTime lastLogin;

    @Column(name = "DELETABLE")
    private boolean deletable = true;

    @Column(name = "IS_CHILD")
    private boolean child;

    @Column(name = "FIRST_LOGIN")
    private boolean firstLogin;

    @PersistenceConstructor
    protected AppUser() {
        // for hibernate
    }

    public void addUserGroup(FredBetUserGroup... fredBetUserGroups) {
        if (this.roles == null) {
            this.roles = new HashSet<>();
        }
        for (FredBetUserGroup fredBetUserGroup : fredBetUserGroups) {
            this.roles.add(fredBetUserGroup.name());
        }
    }

    @Override
    public boolean equals(Object obj) {
        if (obj == null) {
            return false;
        }
        if (obj == this) {
            return true;
        }
        if (obj.getClass() != getClass()) {
            return false;
        }
        AppUser other = (AppUser) obj;
        EqualsBuilder builder = new EqualsBuilder();
        builder.append(id, other.id);
        builder.append(username, other.username);
        builder.append(password, other.password);
        builder.append(roles, other.roles);
        builder.append(deletable, other.deletable);
        builder.append(firstLogin, other.firstLogin);
        return builder.isEquals();
    }

    @Override
    public int hashCode() {
        HashCodeBuilder builder = new HashCodeBuilder();
        builder.append(id);
        builder.append(username);
        builder.append(password);
        builder.append(roles);
        builder.append(deletable);
        builder.append(firstLogin);
        return builder.toHashCode();
    }

    @Override
    public String toString() {
        ToStringBuilder builder = new ToStringBuilder(this, ToStringStyle.MULTI_LINE_STYLE);
        builder.append("id", id);
        builder.append("username", username);
        builder.append("password", password != null ? "is set" : "is null");
        builder.append("roles", roles);
        builder.append("deletable", deletable);
        builder.append("firstLogin", firstLogin);
        return builder.toString();
    }

    public Long getId() {
        return id;
    }

    @Override
    public Collection<? extends GrantedAuthority> getAuthorities() {
        if (CollectionUtils.isEmpty(roles)) {
            return Collections.emptyList();
        }
        return roles.stream().map(SimpleGrantedAuthority::new).collect(Collectors.toList());
    }

    public boolean hasPermission(String permission) {
        Collection<? extends GrantedAuthority> authorities = this.getAuthorities();
        for (GrantedAuthority grantedAuthority : authorities) {
            if (grantedAuthority.getAuthority().equals(permission)) {
                return true;
            }
        }

        return false;
    }

    public boolean isDeletable() {
        return deletable;
    }

    @Override
    public String getPassword() {
        return password;
    }

    @Override
    public String getUsername() {
        return username;
    }

    @Override
    public boolean isAccountNonExpired() {
        return true;
    }

    @Override
    public boolean isAccountNonLocked() {
        return true;
    }

    @Override
    public boolean isCredentialsNonExpired() {
        return true;
    }

    @Override
    public boolean isEnabled() {
        return true;
    }

    public String getRolesAsString() {
        if (CollectionUtils.isEmpty(roles)) {
            return null;
        }
        return String.join(", ", roles);
    }

    public Set<String> getRoles() {
        return roles;
    }

    public void setRoles(Set<String> roles) {
        this.roles = roles;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    void setDeletable(boolean deletable) {
        this.deletable = deletable;
    }

    public int roleCount() {
        return this.roles.size();
    }

    public LocalDateTime getCreatedAt() {
        return createdAt;
    }

    @PrePersist
    private void prePersist() {
        if (this.createdAt == null) {
            this.createdAt = LocalDateTime.now();
        }
    }

    public LocalDateTime getLastLogin() {
        return lastLogin;
    }

    public void setLastLogin(LocalDateTime lastLogin) {
        this.lastLogin = lastLogin;
    }

    public boolean isChild() {
        return child;
    }

    public void setChild(boolean child) {
        this.child = child;
    }

    public boolean isTechnicalDefaultUser() {
        return FredbetConstants.TECHNICAL_USERNAME.equals(this.username);
    }

    public boolean isFirstLogin() {
        return firstLogin;
    }

    public void setFirstLogin(boolean firstLogin) {
        this.firstLogin = firstLogin;
    }


}
