package dev.getchat.sdk;

import java.util.ArrayList;

import java.util.Collections;

import java.util.LinkedHashMap;

import java.util.List;

import java.util.Map;

import java.util.Objects;

import org.jspecify.annotations.Nullable;

/** Arguments for {@link GetChatUrlSigner#url}. */

public final class UrlOptions {

private final @Nullable Chat chat;

private final User user;

private final List<Recipient> participants;

private final Map<String, Object> extra;

private UrlOptions(@Nullable Chat chat, User user, List<Recipient> participants, Map<String, Object> extra) {

this.chat = chat;

this.user = user;

this.participants = participants;

this.extra = extra;

}

public static Builder builder() {

return new Builder();

}

public @Nullable Chat chat() {

return chat;

}

public User user() {

return user;

}

public List<Recipient> participants() {

return Collections.unmodifiableList(participants);

}

/**

* Extra query parameters. They are appended after the signature and are not

* signed, so the backend treats them as untrusted presentation hints.

*/

public Map<String, Object> extra() {

return Collections.unmodifiableMap(extra);

}

/** Equal to another {@code UrlOptions} carrying the same chat, user, participants and extra. */

@Override

public boolean equals(@Nullable Object o) {

return this == o

|| (o instanceof UrlOptions other

&& Objects.equals(chat, other.chat)

&& user.equals(other.user)

&& participants.equals(other.participants)

&& extra.equals(other.extra));

}

@Override

public int hashCode() {

return Objects.hash(chat, user, participants, extra);

}

/** Compact dump for logs; carries only the user data already in the URL. */

@Override

public String toString() {

return "UrlOptions{chat=" + chat

+ ", user=" + user

+ ", participants=" + participants

+ ", extra=" + extra

+ "}";

}

/** Builder for {@link UrlOptions}. */

public static final class Builder {

private @Nullable Chat chat;

private @Nullable User user;

private final List<Recipient> participants = new ArrayList<>();

private final Map<String, Object> extra = new LinkedHashMap<>();

private Builder() {}

public Builder chat(Chat chat) {

this.chat = chat;

return this;

}

public Builder chat(String chatId) {

this.chat = Chat.of(chatId);

return this;

}

public Builder user(User user) {

this.user = user;

return this;

}

public Builder participant(Recipient recipient) {

this.participants.add(recipient);

return this;

}

public Builder participants(List<Recipient> recipients) {

this.participants.addAll(recipients);

return this;

}

public Builder extra(String key, @Nullable Object value) {

this.extra.put(key, value);

return this;

}

public Builder extra(Map<String, Object> values) {

this.extra.putAll(values);

return this;

}

public UrlOptions build() {

if (user == null) {

// Intentional input validation throws GetChatException so every

// SDK misuse lands in one catchable hierarchy.

throw new GetChatException("user parameter have to be a plain object");

}

return new UrlOptions(chat, user, new ArrayList<>(participants), new LinkedHashMap<>(extra));

}

}

}