import { describe, expect, it } from 'vitest'
import { deepMergeOptimizeDeps } from './mergeUserConfig'

describe('deepMergeOptimizeDeps', () => {
  it('filters excluded deps from include list', () => {
    const a = {
      optimizeDeps: {
        include: ['react', 'react-native-reanimated', 'lodash'],
        exclude: [],
      },
    }
    const b = {
      optimizeDeps: {
        exclude: ['react-native-reanimated'],
      },
    }

    deepMergeOptimizeDeps(a, b)

    expect(a.optimizeDeps.include).toContain('react')
    expect(a.optimizeDeps.include).toContain('lodash')
    expect(a.optimizeDeps.include).not.toContain('react-native-reanimated')
    expect(a.optimizeDeps.exclude).toContain('react-native-reanimated')
  })

  it('filters excluded deps from noExternal list', () => {
    const a = {
      optimizeDeps: {
        include: ['react', 'react-native-reanimated'],
      },
      noExternal: ['react', 'react-native-reanimated'] as (string | RegExp)[],
    }
    const b = {
      optimizeDeps: {
        exclude: ['react-native-reanimated'],
      },
    }

    deepMergeOptimizeDeps(a, b)

    expect(a.noExternal).toContain('react')
    expect(a.noExternal).not.toContain('react-native-reanimated')
  })

  it('filters excluded deps from needsInterop list', () => {
    const a = {
      optimizeDeps: {
        include: [],
        needsInterop: ['react', 'react-native-reanimated'],
      },
    }
    const b = {
      optimizeDeps: {
        exclude: ['react-native-reanimated'],
      },
    }

    deepMergeOptimizeDeps(a, b)

    expect(a.optimizeDeps.needsInterop).toContain('react')
    expect(a.optimizeDeps.needsInterop).not.toContain('react-native-reanimated')
  })

  it('merges excludes from all sources', () => {
    const a = {
      optimizeDeps: {
        exclude: ['a'],
      },
    }
    const b = {
      optimizeDeps: {
        exclude: ['b'],
      },
    }
    const extra = {
      include: [],
      exclude: ['c'],
      needsInterop: [],
      rolldownOptions: {},
    }

    deepMergeOptimizeDeps(a, b, extra)

    expect(a.optimizeDeps.exclude).toContain('a')
    expect(a.optimizeDeps.exclude).toContain('b')
    expect(a.optimizeDeps.exclude).toContain('c')
  })

  it('preserves noExternal: true when set', () => {
    const a = {
      optimizeDeps: {},
      noExternal: true as const,
    }
    const b = {
      optimizeDeps: {
        exclude: ['react-native-reanimated'],
      },
    }

    deepMergeOptimizeDeps(a, b)

    expect(a.noExternal).toBe(true)
  })

  it('handles RegExp in noExternal', () => {
    const regex = /some-pattern/
    const a = {
      optimizeDeps: {
        include: ['react', 'react-native-reanimated'],
      },
      noExternal: [regex, 'react', 'react-native-reanimated'] as (string | RegExp)[],
    }
    const b = {
      optimizeDeps: {
        exclude: ['react-native-reanimated'],
      },
    }

    deepMergeOptimizeDeps(a, b)

    // regex should be preserved
    expect(a.noExternal).toContain(regex)
    expect(a.noExternal).toContain('react')
    expect(a.noExternal).not.toContain('react-native-reanimated')
  })
})