import { 
  pgTable, 
  serial, 
  varchar, 
  text, 
  boolean, 
  integer, 
  timestamp, 
  decimal,
  pgEnum,
  uniqueIndex,
  index
} from 'drizzle-orm/pg-core';
import { relations } from 'drizzle-orm';

// Enums
export const roleEnum = pgEnum('role', ['admin', 'moderator']);
export const sourceTypeEnum = pgEnum('source_type', [
  'website', 'facebook_page', 'facebook_group', 'instagram', 
  'blog', 'news_site', 'youtube', 'tiktok', 'telegram', 'other'
]);
export const sourceStatusEnum = pgEnum('source_status', [
  'pending', 'verified', 'rejected', 'under_review'
]);
export const languageEnum = pgEnum('language', ['sk', 'cs', 'en', 'other']);
export const priorityEnum = pgEnum('priority', ['low', 'medium', 'high', 'urgent']);
export const reportStatusEnum = pgEnum('report_status', [
  'pending', 'in_review', 'approved', 'rejected', 'duplicate'
]);

// Users table
export const users = pgTable('users', {
  id: serial('id').primaryKey(),
  email: varchar('email', { length: 255 }).notNull().unique(),
  passwordHash: varchar('password_hash', { length: 255 }).notNull(),
  name: varchar('name', { length: 100 }).notNull(),
  role: roleEnum('role').default('moderator'),
  isActive: boolean('is_active').default(true),
  lastLogin: timestamp('last_login'),
  createdAt: timestamp('created_at').defaultNow(),
  updatedAt: timestamp('updated_at').defaultNow()
});

// Categories table
export const categories = pgTable('categories', {
  id: serial('id').primaryKey(),
  name: varchar('name', { length: 100 }).notNull().unique(),
  slug: varchar('slug', { length: 100 }).notNull().unique(),
  description: text('description'),
  color: varchar('color', { length: 7 }).default('#6B7280'),
  priority: integer('priority').default(1),
  icon: varchar('icon', { length: 50 }),
  isActive: boolean('is_active').default(true),
  createdAt: timestamp('created_at').defaultNow(),
  updatedAt: timestamp('updated_at').defaultNow()
}, (table) => {
  return {
    slugIdx: uniqueIndex('idx_categories_slug').on(table.slug),
    priorityIdx: index('idx_categories_priority').on(table.priority)
  };
});

// Sources table
export const sources = pgTable('sources', {
  id: serial('id').primaryKey(),
  url: varchar('url', { length: 1000 }).notNull().unique(),
  domain: varchar('domain', { length: 255 }).notNull(),
  title: varchar('title', { length: 500 }),
  description: text('description'),
  type: sourceTypeEnum('type').notNull(),
  status: sourceStatusEnum('status').default('pending'),
  riskLevel: integer('risk_level').default(1),
  language: languageEnum('language').default('sk'),
  evidenceUrls: text('evidence_urls'), // JSON
  reportedBy: varchar('reported_by', { length: 255 }),
  verifiedBy: integer('verified_by').references(() => users.id),
  rejectionReason: text('rejection_reason'),
  followerCount: integer('follower_count').default(0),
  lastChecked: timestamp('last_checked'),
  metadata: text('metadata').default('{}'), // JSON
  createdAt: timestamp('created_at').defaultNow(),
  updatedAt: timestamp('updated_at').defaultNow()
}, (table) => {
  return {
    domainIdx: index('idx_sources_domain').on(table.domain),
    statusIdx: index('idx_sources_status').on(table.status),
    riskLevelIdx: index('idx_sources_risk_level').on(table.riskLevel),
    typeIdx: index('idx_sources_type').on(table.type),
    createdAtIdx: index('idx_sources_created_at').on(table.createdAt),
    verifiedByIdx: index('idx_sources_verified_by').on(table.verifiedBy),
    statusRiskIdx: index('idx_sources_status_risk').on(table.status, table.riskLevel)
  };
});

// Source Categories junction table
export const sourceCategories = pgTable('source_categories', {
  id: serial('id').primaryKey(),
  sourceId: integer('source_id').notNull().references(() => sources.id, { onDelete: 'cascade' }),
  categoryId: integer('category_id').notNull().references(() => categories.id, { onDelete: 'cascade' }),
  confidenceScore: decimal('confidence_score', { precision: 3, scale: 2 }).default('1.0'),
  addedBy: integer('added_by').references(() => users.id),
  createdAt: timestamp('created_at').defaultNow()
}, (table) => {
  return {
    sourceIdIdx: index('idx_source_categories_source_id').on(table.sourceId),
    categoryIdIdx: index('idx_source_categories_category_id').on(table.categoryId),
    uniqueSourceCategory: uniqueIndex('unique_source_category').on(table.sourceId, table.categoryId)
  };
});

// Reports table
export const reports = pgTable('reports', {
  id: serial('id').primaryKey(),
  sourceUrl: varchar('source_url', { length: 1000 }).notNull(),
  sourceDomain: varchar('source_domain', { length: 255 }).notNull(),
  reporterEmail: varchar('reporter_email', { length: 255 }),
  reporterName: varchar('reporter_name', { length: 100 }),
  categorySuggestions: text('category_suggestions'), // JSON
  description: text('description').notNull(),
  evidenceUrls: text('evidence_urls'), // JSON
  priority: priorityEnum('priority').default('medium'),
  status: reportStatusEnum('status').default('pending'),
  assignedTo: integer('assigned_to').references(() => users.id),
  adminNotes: text('admin_notes'),
  processedAt: timestamp('processed_at'),
  ipAddress: varchar('ip_address', { length: 45 }),
  userAgent: text('user_agent'),
  createdAt: timestamp('created_at').defaultNow(),
  updatedAt: timestamp('updated_at').defaultNow()
}, (table) => {
  return {
    statusIdx: index('idx_reports_status').on(table.status),
    sourceDomainIdx: index('idx_reports_source_domain').on(table.sourceDomain),
    priorityIdx: index('idx_reports_priority').on(table.priority),
    createdAtIdx: index('idx_reports_created_at').on(table.createdAt),
    assignedToIdx: index('idx_reports_assigned_to').on(table.assignedTo)
  };
});

// API Keys table
export const apiKeys = pgTable('api_keys', {
  id: serial('id').primaryKey(),
  keyHash: varchar('key_hash', { length: 255 }).notNull().unique(),
  name: varchar('name', { length: 100 }).notNull(),
  description: text('description'),
  ownerEmail: varchar('owner_email', { length: 255 }).notNull(),
  permissions: text('permissions').default('["read"]'), // JSON
  rateLimit: integer('rate_limit').default(1000),
  isActive: boolean('is_active').default(true),
  usageCount: integer('usage_count').default(0),
  lastUsed: timestamp('last_used'),
  expiresAt: timestamp('expires_at'),
  createdAt: timestamp('created_at').defaultNow(),
  updatedAt: timestamp('updated_at').defaultNow()
}, (table) => {
  return {
    keyHashIdx: uniqueIndex('idx_api_keys_hash').on(table.keyHash),
    ownerIdx: index('idx_api_keys_owner').on(table.ownerEmail)
  };
});

// Audit Logs table
export const auditLogs = pgTable('audit_logs', {
  id: serial('id').primaryKey(),
  userId: integer('user_id').references(() => users.id),
  action: varchar('action', { length: 50 }).notNull(),
  resourceType: varchar('resource_type', { length: 50 }).notNull(),
  resourceId: integer('resource_id'),
  details: text('details'), // JSON
  ipAddress: varchar('ip_address', { length: 45 }),
  createdAt: timestamp('created_at').defaultNow()
}, (table) => {
  return {
    userIdIdx: index('idx_audit_logs_user_id').on(table.userId),
    createdAtIdx: index('idx_audit_logs_created_at').on(table.createdAt),
    actionIdx: index('idx_audit_logs_action').on(table.action),
    resourceTypeIdx: index('idx_audit_logs_resource_type').on(table.resourceType)
  };
});

// Relations
export const usersRelations = relations(users, ({ many }) => ({
  verifiedSources: many(sources),
  sourceCategories: many(sourceCategories),
  assignedReports: many(reports),
  auditLogs: many(auditLogs)
}));

export const categoriesRelations = relations(categories, ({ many }) => ({
  sourceCategories: many(sourceCategories)
}));

export const sourcesRelations = relations(sources, ({ one, many }) => ({
  verifiedBy: one(users, {
    fields: [sources.verifiedBy],
    references: [users.id]
  }),
  sourceCategories: many(sourceCategories)
}));

export const sourceCategoriesRelations = relations(sourceCategories, ({ one }) => ({
  source: one(sources, {
    fields: [sourceCategories.sourceId],
    references: [sources.id]
  }),
  category: one(categories, {
    fields: [sourceCategories.categoryId],
    references: [categories.id]
  }),
  addedBy: one(users, {
    fields: [sourceCategories.addedBy],
    references: [users.id]
  })
}));

export const reportsRelations = relations(reports, ({ one }) => ({
  assignedTo: one(users, {
    fields: [reports.assignedTo],
    references: [users.id]
  })
}));

export const auditLogsRelations = relations(auditLogs, ({ one }) => ({
  user: one(users, {
    fields: [auditLogs.userId],
    references: [users.id]
  })
}));

// System Metrics table
export const systemMetrics = pgTable('system_metrics', {
  id: serial('id').primaryKey(),
  metricType: varchar('metric_type', { length: 50 }).notNull(), // 'cpu', 'memory', 'disk', 'api_calls', 'db_connections'
  value: decimal('value', { precision: 10, scale: 2 }).notNull(),
  unit: varchar('unit', { length: 20 }), // '%', 'MB', 'GB', 'count', 'ms'
  timestamp: timestamp('timestamp').defaultNow()
}, (table) => {
  return {
    typeIdx: index('idx_system_metrics_type').on(table.metricType),
    timestampIdx: index('idx_system_metrics_timestamp').on(table.timestamp),
    typeTimestampIdx: index('idx_system_metrics_type_timestamp').on(table.metricType, table.timestamp)
  };
});

// Analytics Events table
export const analyticsEvents = pgTable('analytics_events', {
  id: serial('id').primaryKey(),
  eventType: varchar('event_type', { length: 50 }).notNull(), // 'source_lookup', 'api_call', 'report_submitted', 'source_verified'
  sourceUrl: varchar('source_url', { length: 1000 }),
  sourceId: integer('source_id').references(() => sources.id),
  userId: integer('user_id').references(() => users.id),
  apiKeyId: integer('api_key_id').references(() => apiKeys.id),
  ipAddress: varchar('ip_address', { length: 45 }),
  userAgent: text('user_agent'),
  responseTime: integer('response_time'), // in milliseconds
  statusCode: integer('status_code'),
  metadata: text('metadata').default('{}'), // JSON
  timestamp: timestamp('timestamp').defaultNow()
}, (table) => {
  return {
    eventTypeIdx: index('idx_analytics_events_type').on(table.eventType),
    timestampIdx: index('idx_analytics_events_timestamp').on(table.timestamp),
    sourceIdIdx: index('idx_analytics_events_source_id').on(table.sourceId),
    apiKeyIdIdx: index('idx_analytics_events_api_key_id').on(table.apiKeyId),
    ipAddressIdx: index('idx_analytics_events_ip').on(table.ipAddress)
  };
});

// Notifications table
export const notifications = pgTable('notifications', {
  id: serial('id').primaryKey(),
  title: varchar('title', { length: 200 }).notNull(),
  message: text('message').notNull(),
  type: varchar('type', { length: 50 }).default('info'), // 'info', 'warning', 'error', 'success'
  userId: integer('user_id').references(() => users.id),
  isRead: boolean('is_read').default(false),
  actionUrl: varchar('action_url', { length: 500 }),
  metadata: text('metadata').default('{}'), // JSON
  createdAt: timestamp('created_at').defaultNow(),
  readAt: timestamp('read_at')
}, (table) => {
  return {
    userIdIdx: index('idx_notifications_user_id').on(table.userId),
    isReadIdx: index('idx_notifications_is_read').on(table.isRead),
    createdAtIdx: index('idx_notifications_created_at').on(table.createdAt),
    typeIdx: index('idx_notifications_type').on(table.type)
  };
});

// System Settings table
export const systemSettings = pgTable('system_settings', {
  id: serial('id').primaryKey(),
  key: varchar('key', { length: 100 }).notNull().unique(),
  value: text('value'),
  type: varchar('type', { length: 50 }).default('string'), // 'string', 'number', 'boolean', 'json'
  description: text('description'),
  category: varchar('category', { length: 50 }).default('general'),
  isPublic: boolean('is_public').default(false),
  updatedBy: integer('updated_by').references(() => users.id),
  createdAt: timestamp('created_at').defaultNow(),
  updatedAt: timestamp('updated_at').defaultNow()
}, (table) => {
  return {
    keyIdx: uniqueIndex('idx_system_settings_key').on(table.key),
    categoryIdx: index('idx_system_settings_category').on(table.category)
  };
});

// Webhooks table
export const webhooks = pgTable('webhooks', {
  id: serial('id').primaryKey(),
  name: varchar('name', { length: 100 }).notNull(),
  url: varchar('url', { length: 1000 }).notNull(),
  events: text('events').notNull(), // JSON array of event types
  secret: varchar('secret', { length: 255 }),
  isActive: boolean('is_active').default(true),
  headers: text('headers').default('{}'), // JSON
  lastTriggered: timestamp('last_triggered'),
  successCount: integer('success_count').default(0),
  failureCount: integer('failure_count').default(0),
  createdBy: integer('created_by').references(() => users.id),
  createdAt: timestamp('created_at').defaultNow(),
  updatedAt: timestamp('updated_at').defaultNow()
}, (table) => {
  return {
    createdByIdx: index('idx_webhooks_created_by').on(table.createdBy),
    isActiveIdx: index('idx_webhooks_is_active').on(table.isActive)
  };
});

// Source Analytics table
export const sourceAnalytics = pgTable('source_analytics', {
  id: serial('id').primaryKey(),
  sourceId: integer('source_id').notNull().references(() => sources.id, { onDelete: 'cascade' }),
  date: timestamp('date').notNull(),
  lookupCount: integer('lookup_count').default(0),
  reportCount: integer('report_count').default(0),
  viewCount: integer('view_count').default(0),
  riskScore: decimal('risk_score', { precision: 3, scale: 2 }),
  metadata: text('metadata').default('{}'), // JSON
}, (table) => {
  return {
    sourceIdIdx: index('idx_source_analytics_source_id').on(table.sourceId),
    dateIdx: index('idx_source_analytics_date').on(table.date),
    uniqueSourceDate: uniqueIndex('unique_source_date').on(table.sourceId, table.date)
  };
});

// Email Templates table
export const emailTemplates = pgTable('email_templates', {
  id: serial('id').primaryKey(),
  name: varchar('name', { length: 100 }).notNull().unique(),
  subject: varchar('subject', { length: 200 }).notNull(),
  htmlBody: text('html_body').notNull(),
  textBody: text('text_body'),
  variables: text('variables').default('[]'), // JSON array of available variables
  isActive: boolean('is_active').default(true),
  createdBy: integer('created_by').references(() => users.id),
  createdAt: timestamp('created_at').defaultNow(),
  updatedAt: timestamp('updated_at').defaultNow()
}, (table) => {
  return {
    nameIdx: uniqueIndex('idx_email_templates_name').on(table.name),
    isActiveIdx: index('idx_email_templates_is_active').on(table.isActive)
  };
});

// Scheduled Jobs table
export const scheduledJobs = pgTable('scheduled_jobs', {
  id: serial('id').primaryKey(),
  name: varchar('name', { length: 100 }).notNull(),
  type: varchar('type', { length: 50 }).notNull(), // 'report_generation', 'data_cleanup', 'backup', 'analytics'
  schedule: varchar('schedule', { length: 100 }).notNull(), // cron expression
  isActive: boolean('is_active').default(true),
  lastRun: timestamp('last_run'),
  nextRun: timestamp('next_run'),
  lastResult: varchar('last_result', { length: 50 }), // 'success', 'failure', 'running'
  config: text('config').default('{}'), // JSON
  createdBy: integer('created_by').references(() => users.id),
  createdAt: timestamp('created_at').defaultNow(),
  updatedAt: timestamp('updated_at').defaultNow()
}, (table) => {
  return {
    nameIdx: index('idx_scheduled_jobs_name').on(table.name),
    typeIdx: index('idx_scheduled_jobs_type').on(table.type),
    nextRunIdx: index('idx_scheduled_jobs_next_run').on(table.nextRun),
    isActiveIdx: index('idx_scheduled_jobs_is_active').on(table.isActive)
  };
});

// Additional Relations
export const systemMetricsRelations = relations(systemMetrics, ({ one }) => ({}));

export const analyticsEventsRelations = relations(analyticsEvents, ({ one }) => ({
  source: one(sources, {
    fields: [analyticsEvents.sourceId],
    references: [sources.id]
  }),
  user: one(users, {
    fields: [analyticsEvents.userId],
    references: [users.id]
  }),
  apiKey: one(apiKeys, {
    fields: [analyticsEvents.apiKeyId],
    references: [apiKeys.id]
  })
}));

export const notificationsRelations = relations(notifications, ({ one }) => ({
  user: one(users, {
    fields: [notifications.userId],
    references: [users.id]
  })
}));

export const systemSettingsRelations = relations(systemSettings, ({ one }) => ({
  updatedBy: one(users, {
    fields: [systemSettings.updatedBy],
    references: [users.id]
  })
}));

export const webhooksRelations = relations(webhooks, ({ one }) => ({
  createdBy: one(users, {
    fields: [webhooks.createdBy],
    references: [users.id]
  })
}));

export const sourceAnalyticsRelations = relations(sourceAnalytics, ({ one }) => ({
  source: one(sources, {
    fields: [sourceAnalytics.sourceId],
    references: [sources.id]
  })
}));

export const emailTemplatesRelations = relations(emailTemplates, ({ one }) => ({
  createdBy: one(users, {
    fields: [emailTemplates.createdBy],
    references: [users.id]
  })
}));

export const scheduledJobsRelations = relations(scheduledJobs, ({ one }) => ({
  createdBy: one(users, {
    fields: [scheduledJobs.createdBy],
    references: [users.id]
  })
}));