using System;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
using InfluxDB.Client.Api.Domain;
using InfluxDB.Client.Api.Service;
using InfluxDB.Client.Core;
using InfluxDB.Client.Domain;

namespace InfluxDB.Client
{
    public interface INotificationRulesApi
    {
        /// <summary>
        /// Add a Slack notification rule.
        /// </summary>
        /// <param name="name">Human-readable name describing the notification rule.</param>
        /// <param name="every">The notification repetition interval.</param>
        /// <param name="messageTemplate">The template used to generate notification.</param>
        /// <param name="status">Status rule the notification rule attempts to match.</param>
        /// <param name="endpoint">The endpoint to use for notification.</param>
        /// <param name="orgId">The ID of the organization that owns this notification rule.</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns>Notification rule created</returns>
        Task<SlackNotificationRule> CreateSlackRuleAsync(string name, string every, string messageTemplate,
            RuleStatusLevel status, SlackNotificationEndpoint endpoint, string orgId,
            CancellationToken cancellationToken = default);

        /// <summary>
        /// Add a Slack notification rule.
        /// </summary>
        /// <param name="name">Human-readable name describing the notification rule.</param>
        /// <param name="every">The notification repetition interval.</param>
        /// <param name="messageTemplate">The template used to generate notification.</param>
        /// <param name="status">Status rule the notification rule attempts to match.</param>
        /// <param name="tagRules">List of tag rules the notification rule attempts to match.</param>
        /// <param name="endpoint">The endpoint to use for notification.</param>
        /// <param name="orgId">The ID of the organization that owns this notification rule.</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns>Notification rule created</returns>
        Task<SlackNotificationRule> CreateSlackRuleAsync(string name, string every, string messageTemplate,
            RuleStatusLevel status, List<TagRule> tagRules, SlackNotificationEndpoint endpoint, string orgId,
            CancellationToken cancellationToken = default);

        /// <summary>
        /// Add a PagerDuty notification rule. 
        /// </summary>
        /// <param name="name">Human-readable name describing the notification rule.</param>
        /// <param name="every">The notification repetition interval.</param>
        /// <param name="messageTemplate">The template used to generate notification.</param>
        /// <param name="status">Status rule the notification rule attempts to match.</param>
        /// <param name="tagRules">List of tag rules the notification rule attempts to match.</param>
        /// <param name="endpoint">The endpoint to use for notification.</param>
        /// <param name="orgId">The ID of the organization that owns this notification rule</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns>Notification rule created</returns>
        Task<PagerDutyNotificationRule> CreatePagerDutyRuleAsync(string name, string every,
            string messageTemplate, RuleStatusLevel status, List<TagRule> tagRules,
            PagerDutyNotificationEndpoint endpoint, string orgId, CancellationToken cancellationToken = default);

        /// <summary>
        /// Add a HTTP notification rule.
        /// </summary>
        /// <param name="name">Human-readable name describing the notification rule.</param>
        /// <param name="every">The notification repetition interval.</param>
        /// <param name="status">Status rule the notification rule attempts to match.</param>
        /// <param name="tagRules">List of tag rules the notification rule attempts to match.</param>
        /// <param name="endpoint">The endpoint to use for notification.</param>
        /// <param name="orgId">The ID of the organization that owns this notification rule.</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns>Notification rule created</returns>
        Task<HTTPNotificationRule> CreateHttpRuleAsync(string name, string every, RuleStatusLevel status,
            List<TagRule> tagRules, HTTPNotificationEndpoint endpoint, string orgId,
            CancellationToken cancellationToken = default);

        /// <summary>
        /// Add a notification rule.
        /// </summary>
        /// <param name="rule">Notification rule to create</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns>Notification rule created</returns>
        Task<NotificationRule> CreateRuleAsync(NotificationRule rule,
            CancellationToken cancellationToken = default);

        /// <summary>
        /// Update a notification rule.
        /// </summary>
        /// <param name="rule">Notification rule update to apply</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns>An updated notification rule</returns>
        Task<NotificationRule> UpdateNotificationRuleAsync(NotificationRule rule,
            CancellationToken cancellationToken = default);

        /// <summary>
        /// Update a notification rule.
        /// </summary>
        /// <param name="ruleId">The notification rule ID.</param>
        /// <param name="update">Notification rule update to apply</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns>An updated notification rule</returns>
        Task<NotificationRule> UpdateNotificationRuleAsync(string ruleId, NotificationRuleUpdate update,
            CancellationToken cancellationToken = default);

        /// <summary>
        /// Delete a notification rule.
        /// </summary>
        /// <param name="rule">The notification rule</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns></returns>
        Task DeleteNotificationRuleAsync(NotificationRule rule, CancellationToken cancellationToken = default);

        /// <summary>
        /// Delete a notification rule.
        /// </summary>
        /// <param name="ruleId">The notification rule ID</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns></returns>
        Task DeleteNotificationRuleAsync(string ruleId, CancellationToken cancellationToken = default);

        /// <summary>
        /// Get a notification rule.
        /// </summary>
        /// <param name="ruleId">The notification rule ID</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns>The notification rule requested</returns>
        Task<NotificationRule> FindNotificationRuleByIdAsync(string ruleId,
            CancellationToken cancellationToken = default);

        /// <summary>
        /// Get notification rules.
        /// </summary>
        /// <param name="orgId">Only show notification rules that belong to a specific organization ID.</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns>A list of notification rules</returns>
        Task<List<NotificationRule>> FindNotificationRulesAsync(string orgId,
            CancellationToken cancellationToken = default);

        /// <summary>
        /// Get all notification rules.
        /// </summary>
        /// <param name="orgId">Only show notification rules that belong to a specific organization ID.</param>
        /// <param name="findOptions">find options</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns></returns>
        Task<NotificationRules> FindNotificationRulesAsync(string orgId, FindOptions findOptions,
            CancellationToken cancellationToken = default);

        /// <summary>
        /// List all labels for a notification rule.
        /// </summary>
        /// <param name="rule">The notification rule.</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns>A list of all labels for a notification rule</returns>
        Task<List<Label>> GetLabelsAsync(NotificationRule rule, CancellationToken cancellationToken = default);

        /// <summary>
        /// List all labels for a notification rule
        /// </summary>
        /// <param name="ruleId"> The notification rule ID.</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns>A list of all labels for a notification rule</returns>
        Task<List<Label>> GetLabelsAsync(string ruleId, CancellationToken cancellationToken = default);

        /// <summary>
        /// Add a label to a notification rule.
        /// </summary>
        /// <param name="label">Label to add</param>
        /// <param name="rule">The notification rule.</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns>The label was added to the notification rule</returns>
        Task<Label> AddLabelAsync(Label label, NotificationRule rule,
            CancellationToken cancellationToken = default);

        /// <summary>
        /// Add a label to a notification rule.
        /// </summary>
        /// <param name="labelId">Label to add</param>
        /// <param name="ruleId">The notification rule ID.</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns>The label was added to the notification rule</returns>
        Task<Label> AddLabelAsync(string labelId, string ruleId,
            CancellationToken cancellationToken = default);

        /// <summary>
        /// Delete label from a notification rule.
        /// </summary>
        /// <param name="label">The label to delete.</param>
        /// <param name="rule">The notification rule.</param>
        /// <param name="cancellationToken">Cancellation token</param>
        Task DeleteLabelAsync(Label label, NotificationRule rule, CancellationToken cancellationToken = default);

        /// <summary>
        /// Delete label from a notification rule.
        /// </summary>
        /// <param name="labelId">The ID of the label to delete.</param>
        /// <param name="ruleId">The notification rule ID.</param>
        /// <param name="cancellationToken">Cancellation token</param>
        Task DeleteLabelAsync(string labelId, string ruleId, CancellationToken cancellationToken = default);
    }

    public class NotificationRulesApi : INotificationRulesApi
    {
        private readonly NotificationRulesService _service;

        protected internal NotificationRulesApi(NotificationRulesService service)
        {
            Arguments.CheckNotNull(service, nameof(service));

            _service = service;
        }

        /// <summary>
        /// Add a Slack notification rule.
        /// </summary>
        /// <param name="name">Human-readable name describing the notification rule.</param>
        /// <param name="every">The notification repetition interval.</param>
        /// <param name="messageTemplate">The template used to generate notification.</param>
        /// <param name="status">Status rule the notification rule attempts to match.</param>
        /// <param name="endpoint">The endpoint to use for notification.</param>
        /// <param name="orgId">The ID of the organization that owns this notification rule.</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns>Notification rule created</returns>
        public Task<SlackNotificationRule> CreateSlackRuleAsync(string name, string every, string messageTemplate,
            RuleStatusLevel status, SlackNotificationEndpoint endpoint, string orgId,
            CancellationToken cancellationToken = default)
        {
            Arguments.CheckNonEmptyString(name, nameof(name));
            Arguments.CheckNonEmptyString(every, nameof(every));
            Arguments.CheckNonEmptyString(messageTemplate, nameof(messageTemplate));
            Arguments.CheckNotNull(status, nameof(status));
            Arguments.CheckNotNull(endpoint, nameof(endpoint));
            Arguments.CheckNonEmptyString(orgId, nameof(orgId));

            return CreateSlackRuleAsync(name, every, messageTemplate, status, new List<TagRule>(), endpoint,
                orgId, cancellationToken);
        }

        /// <summary>
        /// Add a Slack notification rule.
        /// </summary>
        /// <param name="name">Human-readable name describing the notification rule.</param>
        /// <param name="every">The notification repetition interval.</param>
        /// <param name="messageTemplate">The template used to generate notification.</param>
        /// <param name="status">Status rule the notification rule attempts to match.</param>
        /// <param name="tagRules">List of tag rules the notification rule attempts to match.</param>
        /// <param name="endpoint">The endpoint to use for notification.</param>
        /// <param name="orgId">The ID of the organization that owns this notification rule.</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns>Notification rule created</returns>
        public async Task<SlackNotificationRule> CreateSlackRuleAsync(string name, string every, string messageTemplate,
            RuleStatusLevel status, List<TagRule> tagRules, SlackNotificationEndpoint endpoint, string orgId,
            CancellationToken cancellationToken = default)
        {
            Arguments.CheckNonEmptyString(name, nameof(name));
            Arguments.CheckNonEmptyString(every, nameof(every));
            Arguments.CheckNonEmptyString(messageTemplate, nameof(messageTemplate));
            Arguments.CheckNotNull(status, nameof(status));
            Arguments.CheckNotNull(endpoint, nameof(endpoint));
            Arguments.CheckNotNull(tagRules, nameof(tagRules));
            Arguments.CheckNonEmptyString(orgId, nameof(orgId));

            var rule = new SlackNotificationRule(messageTemplate: messageTemplate, name: name, every: every,
                orgID: orgId, tagRules: tagRules, statusRules: new List<StatusRule> { new StatusRule(status) },
                endpointID: endpoint.Id, status: TaskStatusType.Active);

            return (SlackNotificationRule)await CreateRuleAsync(rule, cancellationToken).ConfigureAwait(false);
        }

        /// <summary>
        /// Add a PagerDuty notification rule. 
        /// </summary>
        /// <param name="name">Human-readable name describing the notification rule.</param>
        /// <param name="every">The notification repetition interval.</param>
        /// <param name="messageTemplate">The template used to generate notification.</param>
        /// <param name="status">Status rule the notification rule attempts to match.</param>
        /// <param name="tagRules">List of tag rules the notification rule attempts to match.</param>
        /// <param name="endpoint">The endpoint to use for notification.</param>
        /// <param name="orgId">The ID of the organization that owns this notification rule</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns>Notification rule created</returns>
        public async Task<PagerDutyNotificationRule> CreatePagerDutyRuleAsync(string name, string every,
            string messageTemplate, RuleStatusLevel status, List<TagRule> tagRules,
            PagerDutyNotificationEndpoint endpoint, string orgId, CancellationToken cancellationToken = default)
        {
            Arguments.CheckNonEmptyString(name, nameof(name));
            Arguments.CheckNonEmptyString(every, nameof(every));
            Arguments.CheckNonEmptyString(messageTemplate, nameof(messageTemplate));
            Arguments.CheckNotNull(status, nameof(status));
            Arguments.CheckNotNull(endpoint, nameof(endpoint));
            Arguments.CheckNotNull(tagRules, nameof(tagRules));
            Arguments.CheckNonEmptyString(orgId, nameof(orgId));

            var rule = new PagerDutyNotificationRule(messageTemplate: messageTemplate, name: name, every: every,
                orgID: orgId, tagRules: tagRules, statusRules: new List<StatusRule> { new StatusRule(status) },
                endpointID: endpoint.Id, status: TaskStatusType.Active);

            return (PagerDutyNotificationRule)await CreateRuleAsync(rule, cancellationToken).ConfigureAwait(false);
        }

        /// <summary>
        /// Add a HTTP notification rule.
        /// </summary>
        /// <param name="name">Human-readable name describing the notification rule.</param>
        /// <param name="every">The notification repetition interval.</param>
        /// <param name="status">Status rule the notification rule attempts to match.</param>
        /// <param name="tagRules">List of tag rules the notification rule attempts to match.</param>
        /// <param name="endpoint">The endpoint to use for notification.</param>
        /// <param name="orgId">The ID of the organization that owns this notification rule.</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns>Notification rule created</returns>
        public async Task<HTTPNotificationRule> CreateHttpRuleAsync(string name, string every, RuleStatusLevel status,
            List<TagRule> tagRules, HTTPNotificationEndpoint endpoint, string orgId,
            CancellationToken cancellationToken = default)
        {
            var rule = new HTTPNotificationRule(name: name, every: every,
                orgID: orgId, tagRules: tagRules, statusRules: new List<StatusRule> { new StatusRule(status) },
                endpointID: endpoint.Id, status: TaskStatusType.Active);

            return (HTTPNotificationRule)await CreateRuleAsync(rule, cancellationToken).ConfigureAwait(false);
        }

        /// <summary>
        /// Add a notification rule.
        /// </summary>
        /// <param name="rule">Notification rule to create</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns>Notification rule created</returns>
        public Task<NotificationRule> CreateRuleAsync(NotificationRule rule,
            CancellationToken cancellationToken = default)
        {
            Arguments.CheckNotNull(rule, nameof(rule));

            return _service.CreateNotificationRuleAsync(rule, cancellationToken);
        }

        /// <summary>
        /// Update a notification rule.
        /// </summary>
        /// <param name="rule">Notification rule update to apply</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns>An updated notification rule</returns>
        public Task<NotificationRule> UpdateNotificationRuleAsync(NotificationRule rule,
            CancellationToken cancellationToken = default)
        {
            Arguments.CheckNotNull(rule, nameof(rule));

            Enum.TryParse(rule.Status.ToString(), true,
                out NotificationRuleUpdate.StatusEnum status);

            return UpdateNotificationRuleAsync(rule.Id,
                new NotificationRuleUpdate(rule.Name, rule.Description, status), cancellationToken);
        }

        /// <summary>
        /// Update a notification rule.
        /// </summary>
        /// <param name="ruleId">The notification rule ID.</param>
        /// <param name="update">Notification rule update to apply</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns>An updated notification rule</returns>
        public Task<NotificationRule> UpdateNotificationRuleAsync(string ruleId, NotificationRuleUpdate update,
            CancellationToken cancellationToken = default)
        {
            Arguments.CheckNonEmptyString(ruleId, nameof(ruleId));
            Arguments.CheckNotNull(update, nameof(update));

            return _service.PatchNotificationRulesIDAsync(ruleId, update, cancellationToken: cancellationToken);
        }

        /// <summary>
        /// Delete a notification rule.
        /// </summary>
        /// <param name="rule">The notification rule</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns></returns>
        public Task DeleteNotificationRuleAsync(NotificationRule rule, CancellationToken cancellationToken = default)
        {
            Arguments.CheckNotNull(rule, nameof(rule));

            return DeleteNotificationRuleAsync(rule.Id, cancellationToken);
        }

        /// <summary>
        /// Delete a notification rule.
        /// </summary>
        /// <param name="ruleId">The notification rule ID</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns></returns>
        public Task DeleteNotificationRuleAsync(string ruleId, CancellationToken cancellationToken = default)
        {
            Arguments.CheckNonEmptyString(ruleId, nameof(ruleId));

            return _service.DeleteNotificationRulesIDAsync(ruleId, cancellationToken: cancellationToken);
        }

        /// <summary>
        /// Get a notification rule.
        /// </summary>
        /// <param name="ruleId">The notification rule ID</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns>The notification rule requested</returns>
        public Task<NotificationRule> FindNotificationRuleByIdAsync(string ruleId,
            CancellationToken cancellationToken = default)
        {
            Arguments.CheckNonEmptyString(ruleId, nameof(ruleId));

            return _service.GetNotificationRulesIDAsync(ruleId, cancellationToken: cancellationToken);
        }

        /// <summary>
        /// Get notification rules.
        /// </summary>
        /// <param name="orgId">Only show notification rules that belong to a specific organization ID.</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns>A list of notification rules</returns>
        public async Task<List<NotificationRule>> FindNotificationRulesAsync(string orgId,
            CancellationToken cancellationToken = default)
        {
            Arguments.CheckNonEmptyString(orgId, nameof(orgId));

            var response = await FindNotificationRulesAsync(orgId, new FindOptions(), cancellationToken)
                .ConfigureAwait(false);
            return response._NotificationRules;
        }

        /// <summary>
        /// Get all notification rules.
        /// </summary>
        /// <param name="orgId">Only show notification rules that belong to a specific organization ID.</param>
        /// <param name="findOptions">find options</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns></returns>
        public Task<NotificationRules> FindNotificationRulesAsync(string orgId, FindOptions findOptions,
            CancellationToken cancellationToken = default)
        {
            Arguments.CheckNonEmptyString(orgId, nameof(orgId));
            Arguments.CheckNotNull(findOptions, nameof(findOptions));

            return _service.GetNotificationRulesAsync(orgId, offset: findOptions.Offset,
                limit: findOptions.Limit, cancellationToken: cancellationToken);
        }

        /// <summary>
        /// List all labels for a notification rule.
        /// </summary>
        /// <param name="rule">The notification rule.</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns>A list of all labels for a notification rule</returns>
        public Task<List<Label>> GetLabelsAsync(NotificationRule rule, CancellationToken cancellationToken = default)
        {
            Arguments.CheckNotNull(rule, nameof(rule));

            return GetLabelsAsync(rule.Id, cancellationToken);
        }

        /// <summary>
        /// List all labels for a notification rule
        /// </summary>
        /// <param name="ruleId"> The notification rule ID.</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns>A list of all labels for a notification rule</returns>
        public async Task<List<Label>> GetLabelsAsync(string ruleId, CancellationToken cancellationToken = default)
        {
            Arguments.CheckNonEmptyString(ruleId, nameof(ruleId));

            var response = await _service
                .GetNotificationRulesIDLabelsAsync(ruleId, cancellationToken: cancellationToken).ConfigureAwait(false);
            return response.Labels;
        }

        /// <summary>
        /// Add a label to a notification rule.
        /// </summary>
        /// <param name="label">Label to add</param>
        /// <param name="rule">The notification rule.</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns>The label was added to the notification rule</returns>
        public Task<Label> AddLabelAsync(Label label, NotificationRule rule,
            CancellationToken cancellationToken = default)
        {
            Arguments.CheckNotNull(rule, nameof(rule));
            Arguments.CheckNotNull(label, nameof(label));

            return AddLabelAsync(label.Id, rule.Id, cancellationToken);
        }

        /// <summary>
        /// Add a label to a notification rule.
        /// </summary>
        /// <param name="labelId">Label to add</param>
        /// <param name="ruleId">The notification rule ID.</param>
        /// <param name="cancellationToken">Cancellation token</param>
        /// <returns>The label was added to the notification rule</returns>
        public async Task<Label> AddLabelAsync(string labelId, string ruleId,
            CancellationToken cancellationToken = default)
        {
            Arguments.CheckNonEmptyString(ruleId, nameof(ruleId));
            Arguments.CheckNonEmptyString(labelId, nameof(labelId));

            var mapping = new LabelMapping(labelId);

            var response = await _service
                .PostNotificationRuleIDLabelsAsync(ruleId, mapping, cancellationToken: cancellationToken)
                .ConfigureAwait(false);
            return response.Label;
        }

        /// <summary>
        /// Delete label from a notification rule.
        /// </summary>
        /// <param name="label">The label to delete.</param>
        /// <param name="rule">The notification rule.</param>
        /// <param name="cancellationToken">Cancellation token</param>
        public Task DeleteLabelAsync(Label label, NotificationRule rule, CancellationToken cancellationToken = default)
        {
            Arguments.CheckNotNull(rule, nameof(rule));
            Arguments.CheckNotNull(label, nameof(label));

            return DeleteLabelAsync(label.Id, rule.Id, cancellationToken);
        }

        /// <summary>
        /// Delete label from a notification rule.
        /// </summary>
        /// <param name="labelId">The ID of the label to delete.</param>
        /// <param name="ruleId">The notification rule ID.</param>
        /// <param name="cancellationToken">Cancellation token</param>
        public Task DeleteLabelAsync(string labelId, string ruleId, CancellationToken cancellationToken = default)
        {
            Arguments.CheckNonEmptyString(ruleId, nameof(ruleId));
            Arguments.CheckNonEmptyString(labelId, nameof(labelId));

            return _service.DeleteNotificationRulesIDLabelsIDAsync(ruleId, labelId,
                cancellationToken: cancellationToken);
        }
    }
}