package com.complycubereactnative

import com.complycube.sdk.presentation.theme.DesignTokens
import com.complycube.sdk.presentation.theme.LookAndFeel
import kotlin.test.Test
import kotlin.test.assertEquals
import kotlin.test.assertSame

class ComplyCubeAppearanceTest {

    @Test
    fun designTokensTakePrecedenceOverLookAndFeel() {
        val builder = FakeBuilder()
        val tokens = DesignTokens()
        val lookAndFeel = LookAndFeel()

        val applied = applyAppearance(
            builder,
            tokens,
            lookAndFeel,
            { withDesignTokens(it) },
            { withLookAndFeel(it) }
        )

        assertEquals(AppliedAppearance.DESIGN_TOKENS, applied)
        assertSame(tokens, builder.lastDesignTokens)
        assertEquals(1, builder.designTokensCalls)
        assertEquals(0, builder.lookAndFeelCalls)
    }

    @Test
    fun fallsBackToLookAndFeelWhenDesignTokensAreAbsent() {
        val builder = FakeBuilder()
        val lookAndFeel = LookAndFeel()

        val applied = applyAppearance(
            builder,
            null,
            lookAndFeel,
            { withDesignTokens(it) },
            { withLookAndFeel(it) }
        )

        assertEquals(AppliedAppearance.LOOK_AND_FEEL, applied)
        assertSame(lookAndFeel, builder.lastLookAndFeel)
        assertEquals(0, builder.designTokensCalls)
        assertEquals(1, builder.lookAndFeelCalls)
    }

    @Test
    fun returnsNoneWhenNoAppearanceIsProvided() {
        val builder = FakeBuilder()

        val applied = applyAppearance(
            builder,
            null,
            null,
            { withDesignTokens(it) },
            { withLookAndFeel(it) }
        )

        assertEquals(AppliedAppearance.NONE, applied)
        assertEquals(0, builder.designTokensCalls)
        assertEquals(0, builder.lookAndFeelCalls)
    }

    private class FakeBuilder {
        var designTokensCalls = 0
        var lookAndFeelCalls = 0
        var lastDesignTokens: DesignTokens? = null
        var lastLookAndFeel: LookAndFeel? = null

        fun withDesignTokens(tokens: DesignTokens) {
            designTokensCalls += 1
            lastDesignTokens = tokens
        }

        fun withLookAndFeel(lookAndFeel: LookAndFeel) {
            lookAndFeelCalls += 1
            lastLookAndFeel = lookAndFeel
        }
    }
}