import { describe, expect, it } from 'vitest'
import { flattenMapping } from '../../../src/es/mapping.js'

const raw = {
    myindex: {
        mappings: {
            properties: {
                id: { type: 'keyword' },
                title: { type: 'text', fields: { raw: { type: 'keyword' } } },
                author: { properties: { name: { type: 'text' }, age: { type: 'integer' } } }
            }
        }
    }
}

describe('flattenMapping', () => {
    it('flattens nested properties to dotted field:type rows', () => {
        const rows = flattenMapping(raw)
        expect(rows).toContainEqual({ field: 'id', type: 'keyword' })
        expect(rows).toContainEqual({ field: 'title', type: 'text' })
        expect(rows).toContainEqual({ field: 'title.raw', type: 'keyword' })
        expect(rows).toContainEqual({ field: 'author.name', type: 'text' })
        expect(rows).toContainEqual({ field: 'author.age', type: 'integer' })
    })
    it('handles multiple indices by prefixing the index name', () => {
        const rows = flattenMapping({
            a: { mappings: { properties: { x: { type: 'long' } } } },
            b: { mappings: { properties: { y: { type: 'date' } } } }
        })
        expect(rows).toContainEqual({ index: 'a', field: 'x', type: 'long' })
        expect(rows).toContainEqual({ index: 'b', field: 'y', type: 'date' })
    })
    it('returns empty array for an empty mapping', () => {
        expect(flattenMapping({ idx: { mappings: {} } })).toEqual([])
    })
    it('returns empty array for a non-object input', () => {
        expect(flattenMapping(null)).toEqual([])
        expect(flattenMapping('nope')).toEqual([])
    })
})