import { randomUUID } from 'crypto'
import type { TimelineEntry } from '../../../shared/timeline'
import type { SqliteDb } from '../types'

function mapRow(row: Record<string, unknown>): TimelineEntry {
  return {
    id: row.id as string,
    kind: 'manual',
    title: row.title as string,
    storyTime: (row.story_time as string) ?? null,
    sortOrder: row.sort_order as number,
    notes: (row.notes as string) ?? ''
  }
}

export class TimelineRepository {
  constructor(private db: SqliteDb) {}

  listManual(): TimelineEntry[] {
    return (
      this.db
        .prepare('SELECT * FROM timeline_events ORDER BY sort_order ASC, created_at ASC')
        .all() as Record<string, unknown>[]
    ).map(mapRow)
  }

  upsert(input: {
    id?: string
    title: string
    storyTime?: string | null
    sortOrder?: number
    notes?: string
  }): TimelineEntry {
    const id = input.id ?? randomUUID()
    const existing = this.db.prepare('SELECT id FROM timeline_events WHERE id = ?').get(id)
    if (existing) {
      this.db
        .prepare(
          `UPDATE timeline_events SET title = ?, story_time = ?, sort_order = ?, notes = ? WHERE id = ?`
        )
        .run(
          input.title,
          input.storyTime ?? null,
          input.sortOrder ?? 0,
          input.notes ?? '',
          id
        )
    } else {
      this.db
        .prepare(
          `INSERT INTO timeline_events (id, title, story_time, sort_order, notes) VALUES (?, ?, ?, ?, ?)`
        )
        .run(id, input.title, input.storyTime ?? null, input.sortOrder ?? 0, input.notes ?? '')
    }
    return mapRow(this.db.prepare('SELECT * FROM timeline_events WHERE id = ?').get(id) as Record<string, unknown>)
  }

  delete(id: string): void {
    this.db.prepare('DELETE FROM timeline_events WHERE id = ?').run(id)
  }
}