package prog8tests.ast

import io.kotest.core.spec.style.FunSpec
import io.kotest.matchers.shouldBe
import io.kotest.matchers.types.instanceOf
import prog8.ast.Program
import prog8.ast.expressions.AddressOf
import prog8.ast.expressions.IdentifierReference
import prog8.ast.expressions.NumericLiteral
import prog8.ast.expressions.PrefixExpression
import prog8.ast.statements.*
import prog8.code.core.Position
import prog8.parser.Prog8Parser
import prog8.parser.SourceCode
import prog8tests.helpers.DummyFunctions
import prog8tests.helpers.DummyMemsizer
import prog8tests.helpers.DummyStringEncoder


class TestIdentifierRef: FunSpec({

    test("constructor and equality") {
        val ident1 = IdentifierReference(listOf("a", "b"), Position("file", 1, 2, 3))
        val ident1same = IdentifierReference(listOf("a", "b"), Position("file", 1, 2, 3))
        val ident1copy = ident1.copy()
        val ident2 = IdentifierReference(listOf("a", "b", "c"), Position("file", 1, 2, 3))
        val ident3 = IdentifierReference(listOf("a", "b"), Position("file2", 11, 22, 33))

        ident1.nameInSource shouldBe listOf("a", "b")
        ident1.isSimple shouldBe true
        (ident1 isSameAs ident1same) shouldBe true
        (ident1 isSameAs ident1copy) shouldBe true
        (ident1 isSameAs ident2) shouldBe false
        (ident1 isSameAs ident3) shouldBe true      // as opposed to inequality, they do refer to the same symbol!
        (ident1 == ident1same) shouldBe true
        (ident1 == ident1copy) shouldBe true
        (ident1 == ident2) shouldBe false
        (ident1 == ident3) shouldBe false

        val pfx = PrefixExpression("-", NumericLiteral.optimalInteger(1, Position.DUMMY), Position.DUMMY)
        (ident1 isSameAs pfx) shouldBe false
    }

    test("target methods") {
        val src= SourceCode.Text("""
            main {
                ubyte bb
                uword ww
                sub start() {
                    ww++
                    ww = &main
                }
            } """)
        val module = Prog8Parser.parseModule(src)
        val program = Program("test", DummyFunctions, DummyMemsizer, DummyStringEncoder)
        program.addModule(module)
        val mstmts = (module.statements.single() as Block).statements
        val stmts = mstmts.filterIsInstance<Subroutine>().single().statements
        val wwref = (stmts[0] as PostIncrDecr).target.identifier!!
        val mainref = ((stmts[1] as Assignment).value as AddressOf).identifier
        wwref.nameInSource shouldBe listOf("ww")
        wwref.wasStringLiteral(program) shouldBe false
        wwref.targetStatement(program) shouldBe instanceOf<VarDecl>()
        wwref.targetVarDecl(program)!!.name shouldBe "ww"
        wwref.targetVarDecl(program)!!.parent shouldBe instanceOf<Block>()
        mainref.nameInSource shouldBe listOf("main")
        mainref.wasStringLiteral(program) shouldBe false
        mainref.targetStatement(program) shouldBe instanceOf<Block>()
    }
})