/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *--------------------------------------------------------------------------------------------*/

package com.github.copilot.sdk.json;

import java.util.Collections;
import java.util.List;
import java.util.Map;

import com.fasterxml.jackson.annotation.JsonInclude;

/**
 * Configuration for resuming an existing Copilot session.
 * <p>
 * This class provides options for configuring a resumed session, including tool
 * registration, provider configuration, and streaming. All setter methods
 * return {@code this} for method chaining.
 *
 * <h2>Example Usage</h2>
 *
 * <pre>{@code
 * var config = new ResumeSessionConfig().setStreaming(true).setTools(List.of(myTool));
 *
 * var session = client.resumeSession(sessionId, config).get();
 * }</pre>
 *
 * @see com.github.copilot.sdk.CopilotClient#resumeSession(String,
 *      ResumeSessionConfig)
 * @since 1.0.0
 */
@JsonInclude(JsonInclude.Include.NON_NULL)
public class ResumeSessionConfig {

    private List<ToolDefinition> tools;
    private ProviderConfig provider;
    private String reasoningEffort;
    private PermissionHandler onPermissionRequest;
    private UserInputHandler onUserInputRequest;
    private SessionHooks hooks;
    private String workingDirectory;
    private boolean disableResume;
    private boolean streaming;
    private Map<String, Object> mcpServers;
    private List<CustomAgentConfig> customAgents;
    private List<String> skillDirectories;
    private List<String> disabledSkills;

    /**
     * Gets the custom tools for this session.
     *
     * @return the list of tool definitions
     */
    public List<ToolDefinition> getTools() {
        return tools == null ? null : Collections.unmodifiableList(tools);
    }

    /**
     * Sets custom tools that the assistant can invoke during the session.
     *
     * @param tools
     *            the list of tool definitions
     * @return this config for method chaining
     * @see ToolDefinition
     */
    public ResumeSessionConfig setTools(List<ToolDefinition> tools) {
        this.tools = tools;
        return this;
    }

    /**
     * Gets the custom API provider configuration.
     *
     * @return the provider configuration
     */
    public ProviderConfig getProvider() {
        return provider;
    }

    /**
     * Sets a custom API provider for BYOK scenarios.
     *
     * @param provider
     *            the provider configuration
     * @return this config for method chaining
     * @see ProviderConfig
     */
    public ResumeSessionConfig setProvider(ProviderConfig provider) {
        this.provider = provider;
        return this;
    }

    /**
     * Gets the reasoning effort level.
     *
     * @return the reasoning effort level ("low", "medium", "high", or "xhigh")
     */
    public String getReasoningEffort() {
        return reasoningEffort;
    }

    /**
     * Sets the reasoning effort level for models that support it.
     * <p>
     * Valid values: "low", "medium", "high", "xhigh".
     *
     * @param reasoningEffort
     *            the reasoning effort level
     * @return this config for method chaining
     */
    public ResumeSessionConfig setReasoningEffort(String reasoningEffort) {
        this.reasoningEffort = reasoningEffort;
        return this;
    }

    /**
     * Gets the permission request handler.
     *
     * @return the permission handler
     */
    public PermissionHandler getOnPermissionRequest() {
        return onPermissionRequest;
    }

    /**
     * Sets a handler for permission requests from the assistant.
     *
     * @param onPermissionRequest
     *            the permission handler
     * @return this config for method chaining
     * @see PermissionHandler
     */
    public ResumeSessionConfig setOnPermissionRequest(PermissionHandler onPermissionRequest) {
        this.onPermissionRequest = onPermissionRequest;
        return this;
    }

    /**
     * Gets the user input request handler.
     *
     * @return the user input handler
     */
    public UserInputHandler getOnUserInputRequest() {
        return onUserInputRequest;
    }

    /**
     * Sets a handler for user input requests from the agent.
     *
     * @param onUserInputRequest
     *            the user input handler
     * @return this config for method chaining
     * @see UserInputHandler
     */
    public ResumeSessionConfig setOnUserInputRequest(UserInputHandler onUserInputRequest) {
        this.onUserInputRequest = onUserInputRequest;
        return this;
    }

    /**
     * Gets the hook handlers configuration.
     *
     * @return the session hooks
     */
    public SessionHooks getHooks() {
        return hooks;
    }

    /**
     * Sets hook handlers for session lifecycle events.
     *
     * @param hooks
     *            the hooks configuration
     * @return this config for method chaining
     * @see SessionHooks
     */
    public ResumeSessionConfig setHooks(SessionHooks hooks) {
        this.hooks = hooks;
        return this;
    }

    /**
     * Gets the working directory for the session.
     *
     * @return the working directory path
     */
    public String getWorkingDirectory() {
        return workingDirectory;
    }

    /**
     * Sets the working directory for the session.
     *
     * @param workingDirectory
     *            the working directory path
     * @return this config for method chaining
     */
    public ResumeSessionConfig setWorkingDirectory(String workingDirectory) {
        this.workingDirectory = workingDirectory;
        return this;
    }

    /**
     * Returns whether the resume event is disabled.
     *
     * @return {@code true} if the session.resume event is suppressed
     */
    public boolean isDisableResume() {
        return disableResume;
    }

    /**
     * Sets whether to disable the session.resume event.
     * <p>
     * When true, the session.resume event is not emitted.
     *
     * @param disableResume
     *            {@code true} to suppress the resume event
     * @return this config for method chaining
     */
    public ResumeSessionConfig setDisableResume(boolean disableResume) {
        this.disableResume = disableResume;
        return this;
    }

    /**
     * Returns whether streaming is enabled.
     *
     * @return {@code true} if streaming is enabled
     */
    public boolean isStreaming() {
        return streaming;
    }

    /**
     * Sets whether to enable streaming of response chunks.
     *
     * @param streaming
     *            {@code true} to enable streaming
     * @return this config for method chaining
     */
    public ResumeSessionConfig setStreaming(boolean streaming) {
        this.streaming = streaming;
        return this;
    }

    /**
     * Gets the MCP server configurations.
     *
     * @return the MCP servers map
     */
    public Map<String, Object> getMcpServers() {
        return mcpServers == null ? null : Collections.unmodifiableMap(mcpServers);
    }

    /**
     * Sets MCP (Model Context Protocol) server configurations.
     *
     * @param mcpServers
     *            the MCP servers configuration map
     * @return this config for method chaining
     */
    public ResumeSessionConfig setMcpServers(Map<String, Object> mcpServers) {
        this.mcpServers = mcpServers;
        return this;
    }

    /**
     * Gets the custom agent configurations.
     *
     * @return the list of custom agent configurations
     */
    public List<CustomAgentConfig> getCustomAgents() {
        return customAgents == null ? null : Collections.unmodifiableList(customAgents);
    }

    /**
     * Sets custom agent configurations.
     *
     * @param customAgents
     *            the list of custom agent configurations
     * @return this config for method chaining
     * @see CustomAgentConfig
     */
    public ResumeSessionConfig setCustomAgents(List<CustomAgentConfig> customAgents) {
        this.customAgents = customAgents;
        return this;
    }

    /**
     * Gets the skill directories.
     *
     * @return the list of skill directory paths
     */
    public List<String> getSkillDirectories() {
        return skillDirectories == null ? null : Collections.unmodifiableList(skillDirectories);
    }

    /**
     * Sets directories containing skill definitions.
     *
     * @param skillDirectories
     *            the list of skill directory paths
     * @return this config for method chaining
     */
    public ResumeSessionConfig setSkillDirectories(List<String> skillDirectories) {
        this.skillDirectories = skillDirectories;
        return this;
    }

    /**
     * Gets the disabled skills.
     *
     * @return the list of disabled skill names
     */
    public List<String> getDisabledSkills() {
        return disabledSkills == null ? null : Collections.unmodifiableList(disabledSkills);
    }

    /**
     * Sets skills that should be disabled for this session.
     *
     * @param disabledSkills
     *            the list of skill names to disable
     * @return this config for method chaining
     */
    public ResumeSessionConfig setDisabledSkills(List<String> disabledSkills) {
        this.disabledSkills = disabledSkills;
        return this;
    }
}