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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.

package com.azure.resourcemanager.storage.implementation;

import com.azure.core.util.logging.ClientLogger;
import com.azure.resourcemanager.resources.fluentcore.model.implementation.CreatableUpdatableImpl;
import com.azure.resourcemanager.storage.StorageManager;
import com.azure.resourcemanager.storage.fluent.ManagementPoliciesClient;
import com.azure.resourcemanager.storage.fluent.models.ManagementPolicyInner;
import com.azure.resourcemanager.storage.models.ManagementPolicy;
import com.azure.resourcemanager.storage.models.ManagementPolicyName;
import com.azure.resourcemanager.storage.models.ManagementPolicyRule;
import com.azure.resourcemanager.storage.models.ManagementPolicySchema;
import com.azure.resourcemanager.storage.models.PolicyRule;
import reactor.core.publisher.Mono;

import java.time.OffsetDateTime;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;

class ManagementPolicyImpl extends CreatableUpdatableImpl
    implements ManagementPolicy, ManagementPolicy.Definition, ManagementPolicy.Update {
    private final ClientLogger logger = new ClientLogger(getClass());
    private final StorageManager manager;
    private String resourceGroupName;
    private String accountName;
    private ManagementPolicySchema cpolicy;
    private ManagementPolicySchema upolicy;

    ManagementPolicyImpl(String name, StorageManager manager) {
        super(name, new ManagementPolicyInner());
        this.manager = manager;
        // Set resource name
        this.accountName = name;
        //
        this.cpolicy = new ManagementPolicySchema();
        this.upolicy = new ManagementPolicySchema();
    }

    ManagementPolicyImpl(ManagementPolicyInner inner, StorageManager manager) {
        super(inner.name(), inner);
        this.manager = manager;
        // Set resource name
        this.accountName = inner.name();
        // set resource ancestor and positional variables
        this.resourceGroupName = IdParsingUtils.getValueFromIdByName(inner.id(), "resourceGroups");
        this.accountName = IdParsingUtils.getValueFromIdByName(inner.id(), "storageAccounts");
        //
        this.cpolicy = new ManagementPolicySchema();
        this.upolicy = new ManagementPolicySchema();
    }

    @Override
    public StorageManager manager() {
        return this.manager;
    }

    @Override
    public Mono createResourceAsync() {
        ManagementPoliciesClient client = this.manager().serviceClient().getManagementPolicies();
        return client
            .createOrUpdateAsync(this.resourceGroupName, this.accountName, ManagementPolicyName.DEFAULT,
                new ManagementPolicyInner().withPolicy(cpolicy))
            .map(
                resource -> {
                    resetCreateUpdateParameters();
                    return resource;
                })
            .map(innerToFluentMap(this));
    }

    @Override
    public Mono updateResourceAsync() {
        ManagementPoliciesClient client = this.manager().serviceClient().getManagementPolicies();
        return client
            .createOrUpdateAsync(this.resourceGroupName, this.accountName, ManagementPolicyName.DEFAULT,
                new ManagementPolicyInner().withPolicy(upolicy))
            .map(
                resource -> {
                    resetCreateUpdateParameters();
                    return resource;
                })
            .map(innerToFluentMap(this));
    }

    @Override
    protected Mono getInnerAsync() {
        ManagementPoliciesClient client = this.manager().serviceClient().getManagementPolicies();
        return client.getAsync(this.resourceGroupName, this.accountName, ManagementPolicyName.DEFAULT);
    }

    @Override
    public boolean isInCreateMode() {
        return this.innerModel().id() == null;
    }

    private void resetCreateUpdateParameters() {
        this.cpolicy = new ManagementPolicySchema();
        this.upolicy = new ManagementPolicySchema();
    }

    @Override
    public String id() {
        return this.innerModel().id();
    }

    @Override
    public OffsetDateTime lastModifiedTime() {
        return this.innerModel().lastModifiedTime();
    }

    @Override
    public String name() {
        return this.innerModel().name();
    }

    @Override
    public ManagementPolicySchema policy() {
        return this.innerModel().policy();
    }

    @Override
    public String type() {
        return this.innerModel().type();
    }

    @Override
    public List rules() {
        List originalRules = this.policy().rules();
        return originalRules == null
            ? Collections.emptyList()
            : originalRules.stream()
            .map(rule -> new PolicyRuleImpl(rule, this))
            .collect(Collectors.toList());
    }

    @Override
    public ManagementPolicyImpl withExistingStorageAccount(String resourceGroupName, String accountName) {
        this.resourceGroupName = resourceGroupName;
        this.accountName = accountName;
        return this;
    }

    @Override
    public ManagementPolicyImpl withPolicy(ManagementPolicySchema policy) {
        if (isInCreateMode()) {
            this.cpolicy = policy;
        } else {
            this.upolicy = policy;
        }
        return this;
    }

    @Override
    public PolicyRule.DefinitionStages.Blank defineRule(String name) {
        return new PolicyRuleImpl(this, name);
    }

    void defineRule(PolicyRuleImpl policyRuleImpl) {
        if (isInCreateMode()) {
            if (this.cpolicy.rules() == null) {
                this.cpolicy.withRules(new ArrayList());
            }
            List rules = this.cpolicy.rules();
            rules.add(policyRuleImpl.innerModel());
            this.cpolicy.withRules(rules);
        } else {
            if (this.upolicy.rules() == null) {
                this.upolicy.withRules(new ArrayList());
            }
            List rules = this.upolicy.rules();
            rules.add(policyRuleImpl.innerModel());
            this.upolicy.withRules(rules);
        }
    }

    @Override
    public PolicyRule.Update updateRule(String name) {
        ManagementPolicyRule ruleToUpdate = null;
        for (ManagementPolicyRule rule : this.policy().rules()) {
            if (rule.name().equals(name)) {
                ruleToUpdate = rule;
            }
        }
        if (ruleToUpdate == null) {
            throw logger.logExceptionAsError(new UnsupportedOperationException(
                "There is no rule that exists with the name "
                    + name
                    + ". Please define a rule with this name before updating."));
        }
        return new PolicyRuleImpl(ruleToUpdate, this);
    }

    @Override
    public Update withoutRule(String name) {
        ManagementPolicyRule ruleToDelete = null;
        for (ManagementPolicyRule rule : this.policy().rules()) {
            if (rule.name().equals(name)) {
                ruleToDelete = rule;
            }
        }
        if (ruleToDelete == null) {
            throw logger.logExceptionAsError(new UnsupportedOperationException(
                "There is no rule that exists with the name " + name + " so this rule can not be deleted."));
        }
        List currentRules = this.upolicy.rules();
        currentRules.remove(ruleToDelete);
        this.upolicy.withRules(currentRules);
        return this;
    }
}