import * as plugins from './ghost.plugins.js';
import { Ghost } from './classes.ghost.js';
import { type IPost } from './classes.post.js';
import { type IPage } from './classes.page.js';
import { type ITag } from './classes.post.js';

export interface ISyncOptions {
  incremental?: boolean;
  filter?: string;
  dryRun?: boolean;
}

export interface ISyncItemResult {
  sourceId: string;
  sourceSlug: string;
  targetId?: string;
  status: 'created' | 'updated' | 'skipped' | 'failed';
  error?: string;
}

export interface ISyncTargetReport {
  targetUrl: string;
  results: ISyncItemResult[];
  successCount: number;
  failureCount: number;
}

export interface ISyncReport {
  contentType: 'posts' | 'pages' | 'tags';
  totalItems: number;
  targetReports: ISyncTargetReport[];
  duration: number;
  timestamp: Date;
}

export interface ISyncMapping {
  sourceId: string;
  sourceSlug: string;
  targetMappings: Array<{
    targetUrl: string;
    targetId: string;
    lastSynced: Date;
  }>;
}

export class SyncedInstance {
  public sourceGhost: Ghost;
  public targetGhosts: Ghost[];
  private syncMappings: Map<string, ISyncMapping>;
  private syncHistory: ISyncReport[];

  constructor(sourceGhost: Ghost, targetGhosts: Ghost[]) {
    this.sourceGhost = sourceGhost;
    this.targetGhosts = targetGhosts;
    this.syncMappings = new Map();
    this.syncHistory = [];
  }

  private addMapping(contentType: string, sourceId: string, sourceSlug: string, targetUrl: string, targetId: string) {
    const key = `${contentType}:${sourceId}`;
    const existing = this.syncMappings.get(key);
    
    if (existing) {
      const targetMapping = existing.targetMappings.find(tm => tm.targetUrl === targetUrl);
      if (targetMapping) {
        targetMapping.targetId = targetId;
        targetMapping.lastSynced = new Date();
      } else {
        existing.targetMappings.push({
          targetUrl,
          targetId,
          lastSynced: new Date()
        });
      }
    } else {
      this.syncMappings.set(key, {
        sourceId,
        sourceSlug,
        targetMappings: [{
          targetUrl,
          targetId,
          lastSynced: new Date()
        }]
      });
    }
  }

  private getMapping(contentType: string, sourceId: string, targetUrl: string): string | undefined {
    const key = `${contentType}:${sourceId}`;
    const mapping = this.syncMappings.get(key);
    if (!mapping) return undefined;
    
    const targetMapping = mapping.targetMappings.find(tm => tm.targetUrl === targetUrl);
    return targetMapping?.targetId;
  }

  public async syncTags(optionsArg?: ISyncOptions): Promise<ISyncReport> {
    const startTime = Date.now();
    const report: ISyncReport = {
      contentType: 'tags',
      totalItems: 0,
      targetReports: [],
      duration: 0,
      timestamp: new Date()
    };

    const sourceTags = await this.sourceGhost.getTags(optionsArg?.filter ? { filter: optionsArg.filter } : {});
    report.totalItems = sourceTags.length;

    for (const targetGhost of this.targetGhosts) {
      const targetReport: ISyncTargetReport = {
        targetUrl: targetGhost.options.baseUrl,
        results: [],
        successCount: 0,
        failureCount: 0
      };

      for (const sourceTag of sourceTags) {
        try {
          let targetTag: any;
          let status: 'created' | 'updated' | 'skipped' = 'created';

          try {
            targetTag = await targetGhost.getTagBySlug(sourceTag.slug);
            if (!optionsArg?.dryRun) {
              await targetTag.update({
                name: sourceTag.name,
                description: sourceTag.description,
                feature_image: sourceTag.feature_image,
                visibility: sourceTag.visibility,
                meta_title: sourceTag.meta_title,
                meta_description: sourceTag.meta_description
              });
            }
            status = 'updated';
          } catch (error) {
            if (!optionsArg?.dryRun) {
              targetTag = await targetGhost.createTag({
                name: sourceTag.name,
                slug: sourceTag.slug,
                description: sourceTag.description,
                feature_image: sourceTag.feature_image,
                visibility: sourceTag.visibility,
                meta_title: sourceTag.meta_title,
                meta_description: sourceTag.meta_description
              });
            }
          }

          if (!optionsArg?.dryRun && targetTag) {
            this.addMapping('tags', sourceTag.id, sourceTag.slug, targetGhost.options.baseUrl, targetTag.tagData.id);
          }

          targetReport.results.push({
            sourceId: sourceTag.id,
            sourceSlug: sourceTag.slug,
            targetId: targetTag?.tagData?.id,
            status
          });
          targetReport.successCount++;
        } catch (error) {
          targetReport.results.push({
            sourceId: sourceTag.id,
            sourceSlug: sourceTag.slug,
            status: 'failed',
            error: error instanceof Error ? error.message : String(error)
          });
          targetReport.failureCount++;
        }
      }

      report.targetReports.push(targetReport);
    }

    report.duration = Date.now() - startTime;
    this.syncHistory.push(report);
    return report;
  }

  public async syncPosts(optionsArg?: ISyncOptions): Promise<ISyncReport> {
    const startTime = Date.now();
    const report: ISyncReport = {
      contentType: 'posts',
      totalItems: 0,
      targetReports: [],
      duration: 0,
      timestamp: new Date()
    };

    const sourcePosts = await this.sourceGhost.getPosts(optionsArg?.filter ? { filter: optionsArg.filter } : {});
    report.totalItems = sourcePosts.length;

    for (const targetGhost of this.targetGhosts) {
      const targetReport: ISyncTargetReport = {
        targetUrl: targetGhost.options.baseUrl,
        results: [],
        successCount: 0,
        failureCount: 0
      };

      for (const sourcePost of sourcePosts) {
        try {
          const postData = sourcePost.postData;
          
          const tagSlugs = postData.tags?.map(t => t.slug) || [];
          const targetTagIds: string[] = [];
          
          for (const tagSlug of tagSlugs) {
            try {
              const targetTag = await targetGhost.getTagBySlug(tagSlug);
              targetTagIds.push(targetTag.tagData.id);
            } catch (error) {
            }
          }

          const syncData: any = {
            title: postData.title,
            slug: postData.slug,
            html: postData.html,
            feature_image: postData.feature_image,
            featured: postData.featured,
            status: postData.status,
            visibility: postData.visibility,
            meta_title: postData.meta_title,
            meta_description: postData.meta_description,
            published_at: postData.published_at,
            custom_excerpt: postData.custom_excerpt,
            tags: targetTagIds.length > 0 ? targetTagIds.map(id => ({ id })) : undefined
          };

          let targetPost: any;
          let status: 'created' | 'updated' = 'created';

          try {
            targetPost = await targetGhost.contentApi.posts.read({ slug: postData.slug }, { formats: ['html'] });
            if (!optionsArg?.dryRun) {
              const updated = await targetGhost.adminApi.posts.edit({
                ...syncData,
                id: targetPost.id,
                updated_at: targetPost.updated_at
              });
              targetPost = updated;
            }
            status = 'updated';
          } catch (error) {
            if (!optionsArg?.dryRun) {
              targetPost = await targetGhost.adminApi.posts.add(syncData);
            }
          }

          if (!optionsArg?.dryRun && targetPost) {
            this.addMapping('posts', postData.id, postData.slug, targetGhost.options.baseUrl, targetPost.id);
          }

          targetReport.results.push({
            sourceId: postData.id,
            sourceSlug: postData.slug,
            targetId: targetPost?.id,
            status
          });
          targetReport.successCount++;
        } catch (error) {
          targetReport.results.push({
            sourceId: sourcePost.postData.id,
            sourceSlug: sourcePost.postData.slug,
            status: 'failed',
            error: error instanceof Error ? error.message : String(error)
          });
          targetReport.failureCount++;
        }
      }

      report.targetReports.push(targetReport);
    }

    report.duration = Date.now() - startTime;
    this.syncHistory.push(report);
    return report;
  }

  public async syncPages(optionsArg?: ISyncOptions): Promise<ISyncReport> {
    const startTime = Date.now();
    const report: ISyncReport = {
      contentType: 'pages',
      totalItems: 0,
      targetReports: [],
      duration: 0,
      timestamp: new Date()
    };

    const sourcePages = await this.sourceGhost.getPages(optionsArg?.filter ? { filter: optionsArg.filter } : {});
    report.totalItems = sourcePages.length;

    for (const targetGhost of this.targetGhosts) {
      const targetReport: ISyncTargetReport = {
        targetUrl: targetGhost.options.baseUrl,
        results: [],
        successCount: 0,
        failureCount: 0
      };

      for (const sourcePage of sourcePages) {
        try {
          const pageData = sourcePage.pageData;

          const syncData: Partial<IPage> = {
            title: pageData.title,
            slug: pageData.slug,
            html: pageData.html,
            feature_image: pageData.feature_image,
            featured: pageData.featured,
            status: pageData.status,
            visibility: pageData.visibility,
            meta_title: pageData.meta_title,
            meta_description: pageData.meta_description,
            published_at: pageData.published_at,
            custom_excerpt: pageData.custom_excerpt
          };

          let targetPage: any;
          let status: 'created' | 'updated' = 'created';

          try {
            targetPage = await targetGhost.contentApi.pages.read({ slug: pageData.slug }, { formats: ['html'] });
            if (!optionsArg?.dryRun) {
              const updated = await targetGhost.adminApi.pages.edit({
                ...syncData,
                id: targetPage.id,
                updated_at: targetPage.updated_at
              });
              targetPage = updated;
            }
            status = 'updated';
          } catch (error) {
            if (!optionsArg?.dryRun) {
              targetPage = await targetGhost.adminApi.pages.add(syncData);
            }
          }

          if (!optionsArg?.dryRun && targetPage) {
            this.addMapping('pages', pageData.id, pageData.slug, targetGhost.options.baseUrl, targetPage.id);
          }

          targetReport.results.push({
            sourceId: pageData.id,
            sourceSlug: pageData.slug,
            targetId: targetPage?.id,
            status
          });
          targetReport.successCount++;
        } catch (error) {
          targetReport.results.push({
            sourceId: sourcePage.pageData.id,
            sourceSlug: sourcePage.pageData.slug,
            status: 'failed',
            error: error instanceof Error ? error.message : String(error)
          });
          targetReport.failureCount++;
        }
      }

      report.targetReports.push(targetReport);
    }

    report.duration = Date.now() - startTime;
    this.syncHistory.push(report);
    return report;
  }

  public async syncAll(optionsArg?: { types?: Array<'posts' | 'pages' | 'tags'>; syncOptions?: ISyncOptions }): Promise<ISyncReport[]> {
    const types = optionsArg?.types || ['tags', 'posts', 'pages'];
    const reports: ISyncReport[] = [];

    for (const type of types) {
      if (type === 'tags') {
        reports.push(await this.syncTags(optionsArg?.syncOptions));
      } else if (type === 'posts') {
        reports.push(await this.syncPosts(optionsArg?.syncOptions));
      } else if (type === 'pages') {
        reports.push(await this.syncPages(optionsArg?.syncOptions));
      }
    }

    return reports;
  }

  public getSyncStatus(): {
    totalMappings: number;
    mappings: ISyncMapping[];
    recentSyncs: ISyncReport[];
  } {
    return {
      totalMappings: this.syncMappings.size,
      mappings: Array.from(this.syncMappings.values()),
      recentSyncs: this.syncHistory.slice(-10)
    };
  }

  public clearSyncHistory(): void {
    this.syncHistory = [];
  }

  public clearMappings(): void {
    this.syncMappings.clear();
  }
}