import { RegisterClass } from '@memberjunction/global';
import { InstagramBaseAction } from '../instagram-base.action';
import { ActionParam, ActionResultSimple, RunActionParams } from '@memberjunction/actions-base';
import { LogError } from '@memberjunction/core';
import { BaseAction } from '@memberjunction/actions';

/**
 * Schedules an Instagram post for future publication.
 * Note: Instagram API has limited native scheduling support. This action provides
 * scheduling information that needs to be integrated with Facebook Creator Studio
 * or third-party scheduling tools.
 */
@RegisterClass(BaseAction, 'Instagram - Schedule Post')
export class InstagramSchedulePostAction extends InstagramBaseAction {
    
    protected async InternalRunAction(params: RunActionParams): Promise<ActionResultSimple> {
        try {
            const companyIntegrationId = this.getParamValue(params.Params, 'CompanyIntegrationID');
            const content = this.getParamValue(params.Params, 'Content');
            const mediaUrls = this.getParamValue(params.Params, 'MediaUrls') as string[];
            const scheduledTime = this.getParamValue(params.Params, 'ScheduledTime');
            const postType = this.getParamValue(params.Params, 'PostType') || 'FEED';
            const locationId = this.getParamValue(params.Params, 'LocationID');
            const taggedUsers = this.getParamValue(params.Params, 'TaggedUsers') as string[];
            const firstComment = this.getParamValue(params.Params, 'FirstComment');

            // Initialize OAuth
            if (!await this.initializeOAuth(companyIntegrationId)) {
                return {
                    Success: false,
                    Message: 'Failed to initialize Instagram authentication',
                    ResultCode: 'AUTH_FAILED'
                };
            }

            // Validate inputs
            if (!scheduledTime) {
                return {
                    Success: false,
                    Message: 'ScheduledTime is required',
                    ResultCode: 'MISSING_PARAMS'
                };
            }

            if (!mediaUrls || mediaUrls.length === 0) {
                return {
                    Success: false,
                    Message: 'At least one media URL is required',
                    ResultCode: 'MISSING_MEDIA'
                };
            }

            // Validate scheduled time
            const scheduleDate = new Date(scheduledTime);
            const now = new Date();
            
            if (scheduleDate <= now) {
                return {
                    Success: false,
                    Message: 'Scheduled time must be in the future',
                    ResultCode: 'INVALID_SCHEDULE_TIME'
                };
            }

            // Instagram requires scheduling at least 10 minutes in the future
            const minScheduleTime = new Date(now.getTime() + 10 * 60 * 1000);
            if (scheduleDate < minScheduleTime) {
                return {
                    Success: false,
                    Message: 'Posts must be scheduled at least 10 minutes in the future',
                    ResultCode: 'SCHEDULE_TOO_SOON'
                };
            }

            // Instagram limits scheduling to 75 days in the future
            const maxScheduleTime = new Date(now.getTime() + 75 * 24 * 60 * 60 * 1000);
            if (scheduleDate > maxScheduleTime) {
                return {
                    Success: false,
                    Message: 'Posts cannot be scheduled more than 75 days in the future',
                    ResultCode: 'SCHEDULE_TOO_FAR'
                };
            }

            // Create scheduling payload
            const schedulingData = {
                content,
                mediaUrls,
                scheduledTime: scheduleDate.toISOString(),
                postType,
                locationId,
                taggedUsers,
                firstComment,
                accountId: this.instagramBusinessAccountId,
                pageId: this.facebookPageId
            };

            // Instagram doesn't have a direct scheduling API endpoint
            // Instead, we need to use Facebook's Content Publishing API
            // or integrate with Creator Studio
            
            // For now, we'll store the scheduling data and return instructions
            const schedulingId = this.generateSchedulingId();
            
            // In a production environment, you would:
            // 1. Store this in a database
            // 2. Set up a cron job or scheduler to publish at the scheduled time
            // 3. Or integrate with Facebook Creator Studio API
            
            // Store scheduling data (this is a placeholder - implement your storage solution)
            await this.storeSchedulingData(schedulingId, schedulingData);

            // Store result in output params
            const outputParams = [...params.Params];
            outputParams.push({
                Name: 'ResultData',
                Type: 'Output',
                Value: JSON.stringify({
                    schedulingId,
                    scheduledTime: scheduleDate.toISOString(),
                    postType,
                    mediaCount: mediaUrls.length,
                    instructions: {
                        creatorStudio: 'This post can be managed in Facebook Creator Studio',
                        api: 'Use the scheduling ID to retrieve and publish this post at the scheduled time',
                        webhook: 'Set up a webhook to be notified when it\'s time to publish'
                    },
                    schedulingData
                })
            });

            return {
                Success: true,
                Message: 'Instagram post scheduled successfully',
                ResultCode: 'SUCCESS',
                Params: outputParams
            };

        } catch (error: any) {
            LogError('Failed to schedule Instagram post', error);
            
            if (error.code === 'RATE_LIMIT') {
                return {
                    Success: false,
                    Message: 'Instagram API rate limit exceeded. Please try again later.',
                    ResultCode: 'RATE_LIMIT'
                };
            }

            return {
                Success: false,
                Message: `Failed to schedule post: ${error.message}`,
                ResultCode: 'ERROR'
            };
        }
    }

    /**
     * Generate a unique scheduling ID
     */
    private generateSchedulingId(): string {
        const timestamp = Date.now();
        const random = Math.random().toString(36).substring(2, 9);
        return `ig_schedule_${timestamp}_${random}`;
    }

    /**
     * Store scheduling data (placeholder - implement based on your storage solution)
     */
    private async storeSchedulingData(schedulingId: string, data: any): Promise<void> {
        // In a real implementation, this would:
        // 1. Store in a database (e.g., in a ScheduledPosts table)
        // 2. Set up a scheduled job in your job queue
        // 3. Or send to a scheduling service
        
        // For demonstration, we'll just log it
        LogError('Scheduling data would be stored:', schedulingId, data);

        // You could also use MemberJunction entities to store this
        // For example, create a "Social Media Scheduled Posts" entity
        // and save the scheduling data there
    }

    /**
     * Create a scheduled post using Facebook Creator Studio API
     * Note: This is a conceptual implementation as Creator Studio API
     * has specific requirements and approval process
     */
    private async createCreatorStudioScheduledPost(data: any): Promise<string> {
        // This would require:
        // 1. Creator Studio API access
        // 2. Additional permissions
        // 3. Different API endpoints
        
        // For now, we return a placeholder
        throw new Error('Creator Studio integration not implemented. Use the scheduling data to create your own scheduling solution.');
    }

    /**
     * Define the parameters for this action
     */
    public get Params(): ActionParam[] {
        return [
            ...this.commonSocialParams,
            {
                Name: 'Content',
                Type: 'Input',
                Value: null
            },
            {
                Name: 'MediaUrls',
                Type: 'Input',
                Value: null
            },
            {
                Name: 'ScheduledTime',
                Type: 'Input',
                Value: null
            },
            {
                Name: 'PostType',
                Type: 'Input',
                Value: 'FEED'
            },
            {
                Name: 'LocationID',
                Type: 'Input',
                Value: null
            },
            {
                Name: 'TaggedUsers',
                Type: 'Input',
                Value: null
            },
            {
                Name: 'FirstComment',
                Type: 'Input',
                Value: null
            }
        ];
    }

    /**
     * Get the description for this action
     */
    public get Description(): string {
        return 'Schedules an Instagram post for future publication. Returns scheduling data that can be used with Creator Studio or custom scheduling solutions.';
    }
}