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/*
 * Copyright (c) Microsoft Corporation. All rights reserved.
 * Licensed under the MIT License. See License.txt in the project root for license information.
 */

package com.microsoft.azure.toolkit.lib.mysql;

import com.azure.resourcemanager.mysqlflexibleserver.MySqlManager;
import com.azure.resourcemanager.mysqlflexibleserver.models.FirewallRule;
import com.microsoft.azure.toolkit.lib.common.bundle.AzureString;
import com.microsoft.azure.toolkit.lib.common.messager.AzureMessager;
import com.microsoft.azure.toolkit.lib.common.messager.IAzureMessager;
import com.microsoft.azure.toolkit.lib.common.model.AzResource;
import com.microsoft.azure.toolkit.lib.common.operation.AzureOperation;
import lombok.Data;
import lombok.Getter;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.util.Objects;
import java.util.Optional;

public class MySqlFirewallRuleDraft extends MySqlFirewallRule implements AzResource.Draft {
    @Getter
    @Nullable
    private final MySqlFirewallRule origin;
    @Nullable
    private Config config;

    MySqlFirewallRuleDraft(@Nonnull String name, @Nonnull MySqlFirewallRuleModule module) {
        super(name, module);
        this.origin = null;
    }

    MySqlFirewallRuleDraft(@Nonnull MySqlFirewallRule origin) {
        super(origin);
        this.origin = origin;
    }

    @Override
    public void reset() {
        this.config = null;
    }

    @Nonnull
    @Override
    @AzureOperation(name = "azure/mysql.create_firewall_rule.rule", params = {"this.getName()"})
    public FirewallRule createResourceInAzure() {
        final MySqlServer server = this.getParent();
        final MySqlManager manager = Objects.requireNonNull(server.getParent().getRemote());
        final FirewallRule.DefinitionStages.WithCreate withCreate = manager.firewallRules().define(this.getName())
            .withExistingFlexibleServer(this.getResourceGroupName(), server.getName())
            .withStartIpAddress(this.getStartIpAddress())
            .withEndIpAddress(this.getEndIpAddress());
        final IAzureMessager messager = AzureMessager.getMessager();
        messager.info(AzureString.format("Start creating firewall rule \"{0}\"...", this.getName()));
        final FirewallRule rule = withCreate.create();
        messager.success(AzureString.format("Firewall rule \"{0}\" is successfully created.", this.getName()));
        return rule;
    }

    @Nonnull
    @Override
    @AzureOperation(name = "azure/mysql.update_firewall_rule.rule", params = {"this.getName()"})
    public FirewallRule updateResourceInAzure(@Nonnull FirewallRule origin) {
        final Optional modifiedStartIp = Optional.ofNullable(this.getStartIpAddress()).filter(n -> !Objects.equals(n, super.getStartIpAddress()));
        final Optional modifiedEndIp = Optional.ofNullable(this.getEndIpAddress()).filter(n -> !Objects.equals(n, super.getEndIpAddress()));
        if (modifiedStartIp.isPresent() || modifiedEndIp.isPresent()) {
            final MySqlServer server = this.getParent();
            final MySqlManager manager = Objects.requireNonNull(server.getParent().getRemote());
            final FirewallRule.Update update = manager.firewallRules().get(this.getResourceGroupName(), server.getName(), this.getName()).update();
            modifiedStartIp.ifPresent(update::withStartIpAddress);
            modifiedEndIp.ifPresent(update::withEndIpAddress);
            final IAzureMessager messager = AzureMessager.getMessager();
            messager.info(AzureString.format("Start updating firewall rule \"{0}\"...", this.getName()));
            final FirewallRule rule = update.apply();
            messager.success(AzureString.format("Firewall rule \"{0}\" is successfully updated.", this.getName()));
            return rule;
        }
        return origin;
    }

    @Nonnull
    private synchronized Config ensureConfig() {
        this.config = Optional.ofNullable(this.config).orElseGet(Config::new);
        return this.config;
    }

    @Nullable
    @Override
    public String getStartIpAddress() {
        return Optional.ofNullable(this.config).map(Config::getStartIpAddress).orElseGet(super::getStartIpAddress);
    }

    public void setStartIpAddress(String startIpAddress) {
        this.ensureConfig().setStartIpAddress(startIpAddress);
    }

    @Nullable
    @Override
    public String getEndIpAddress() {
        return Optional.ofNullable(this.config).map(Config::getEndIpAddress).orElseGet(super::getEndIpAddress);
    }

    public void setEndIpAddress(String endIpAddress) {
        this.ensureConfig().setEndIpAddress(endIpAddress);
    }

    @Override
    public boolean isModified() {
        final boolean notModified = Objects.isNull(this.config) ||
            Objects.isNull(this.config.getStartIpAddress()) || Objects.equals(this.config.getStartIpAddress(), super.getStartIpAddress()) ||
            Objects.isNull(this.config.getEndIpAddress()) || Objects.equals(this.config.getEndIpAddress(), super.getEndIpAddress());
        return !notModified;
    }

    @Data
    private static class Config {
        private String startIpAddress;
        private String endIpAddress;
    }
}