package prog8tests

import prog8tests.helpers.*
import org.junit.jupiter.api.TestInstance
import org.junit.jupiter.api.Test
import org.junit.jupiter.api.TestFactory
import org.junit.jupiter.api.Nested
import org.junit.jupiter.api.Disabled
import org.junit.jupiter.api.DynamicTest
import org.junit.jupiter.api.DynamicTest.dynamicTest
import kotlin.test.*
import kotlin.io.path.*

import prog8.ast.expressions.AddressOf
import prog8.ast.expressions.IdentifierReference
import prog8.ast.expressions.StringLiteralValue
import prog8.ast.statements.FunctionCallStatement
import prog8.ast.statements.Label
import prog8.compiler.target.Cx16Target


/**
 * ATTENTION: this is just kludge!
 * They are not really unit tests, but rather tests of the whole process,
 * from source file loading all the way through to running 64tass.
 */
@TestInstance(TestInstance.Lifecycle.PER_CLASS)
class TestCompilerOnImportsAndIncludes {

    @Nested
    inner class Import {

        @Test
        fun testImportFromSameFolder() {
            val filepath = assumeReadableFile(fixturesDir, "importFromSameFolder.p8")
            assumeReadableFile(fixturesDir, "foo_bar.p8")

            val platform = Cx16Target
            val result = compileFile(platform, optimize = false, fixturesDir, filepath.name)
                .assertSuccess()

            val program = result.programAst
            val startSub = program.entrypoint()
            val strLits = startSub.statements
                .filterIsInstance<FunctionCallStatement>()
                .map { it.args[0] as IdentifierReference }
                .map { it.targetVarDecl(program)!!.value as StringLiteralValue }

            assertEquals("main.bar", strLits[0].value)
            assertEquals("foo.bar", strLits[1].value)
            assertEquals("main", strLits[0].definingScope().name)
            assertEquals("foo", strLits[1].definingScope().name)
        }

        @Test
        @Disabled("TODO: why would we not accept string literals as argument to %import?")
        fun testImportFromSameFolder_strLit() {
            val filepath = assumeReadableFile(fixturesDir,"importFromSameFolder_strLit.p8")
            val imported = assumeReadableFile(fixturesDir, "foo_bar.p8")

            val platform = Cx16Target
            val result = compileFile(platform, optimize = false, fixturesDir, filepath.name)
                .assertSuccess()

            val program = result.programAst
            val startSub = program.entrypoint()
            val strLits = startSub.statements
                .filterIsInstance<FunctionCallStatement>()
                .map { it.args[0] as IdentifierReference }
                .map { it.targetVarDecl(program)!!.value as StringLiteralValue }

            assertEquals("main.bar", strLits[0].value)
            assertEquals("foo.bar", strLits[1].value)
            assertEquals("main", strLits[0].definingScope().name)
            assertEquals("foo", strLits[1].definingScope().name)
        }
    }

    @Nested
    inner class AsmInclude {
        @Test
        fun testAsmIncludeFromSameFolder() {
            val filepath = assumeReadableFile(fixturesDir, "asmIncludeFromSameFolder.p8")
            assumeReadableFile(fixturesDir, "foo_bar.asm")

            val platform = Cx16Target
            val result = compileFile(platform, optimize = false, fixturesDir, filepath.name)
                .assertSuccess()

            val program = result.programAst
            val startSub = program.entrypoint()
            val args = startSub.statements
                .filterIsInstance<FunctionCallStatement>()
                .map { it.args[0] }

            val str0 = (args[0] as IdentifierReference).targetVarDecl(program)!!.value as StringLiteralValue
            assertEquals("main.bar", str0.value)
            assertEquals("main", str0.definingScope().name)

            val id1 = (args[1] as AddressOf).identifier
            val lbl1 = id1.targetStatement(program) as Label
            assertEquals("foo_bar", lbl1.name)
            assertEquals("start", lbl1.definingScope().name)
        }
    }

    @Nested
    inner class Asmbinary {
        @Test
        fun testAsmbinaryDirectiveWithNonExistingFile() {
            val p8Path = assumeReadableFile(fixturesDir, "asmbinaryNonExisting.p8")
            assumeNotExists(fixturesDir, "i_do_not_exist.bin")

            compileFile(Cx16Target, false, p8Path.parent, p8Path.name, outputDir)
                .assertFailure()
        }

        @Test
        fun testAsmbinaryDirectiveWithNonReadableFile() {
            val p8Path = assumeReadableFile(fixturesDir, "asmbinaryNonReadable.p8")
            assumeDirectory(fixturesDir, "subFolder")

            compileFile(Cx16Target, false, p8Path.parent, p8Path.name, outputDir)
                .assertFailure()
        }

        @TestFactory
        fun asmbinaryDirectiveWithExistingBinFile(): Iterable<DynamicTest> =
            listOf(
                Triple("same ", "asmBinaryFromSameFolder.p8", "do_nothing1.bin"),
                Triple("sub", "asmBinaryFromSubFolder.p8", "subFolder/do_nothing2.bin"),
            ).map {
                val (where, p8Str, binStr) = it
                dynamicTest("%asmbinary from ${where}folder") {
                    val p8Path = assumeReadableFile(fixturesDir, p8Str)
                    val binPath = assumeReadableFile(fixturesDir, binStr)
                    assertNotEquals( // the bug we're testing for (#54) was hidden if outputDir == workinDir
                        workingDir.normalize().toAbsolutePath(),
                        outputDir.normalize().toAbsolutePath(),
                        "sanity check: workingDir and outputDir should not be the same folder"
                    )

                    compileFile(Cx16Target, false, p8Path.parent, p8Path.name, outputDir)
                        .assertSuccess(
                            "argument to assembler directive .binary " +
                                    "should be relative to the generated .asm file (in output dir), " +
                                    "NOT relative to .p8 neither current working dir"
                        )
                }
            }

    }

}