#include "../lexer/lexer.h"
#include "../parser/parser.h"
#include "../semantic/semantic.h"
#include "../ir/ir.h"
#include "../ir/ir_gen.h"
#include "../runtime/runtime.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

static int test_count = 0;
static int pass_count = 0;

static void run_test_int(const char* name, const char* source, int expected) {
    test_count++;

    RavaLexer_t* lexer = rava_lexer_create(source);
    RavaParser_t* parser = rava_parser_create(lexer);
    RavaASTNode_t* ast = rava_parser_parse(parser);

    if (!ast || parser->had_error) {
        printf("FAIL: %s - Parse error: %s\n", name, parser->error_message ? parser->error_message : "unknown");
        rava_parser_destroy(parser);
        rava_lexer_destroy(lexer);
        return;
    }

    RavaSemanticAnalyzer_t* analyzer = rava_semantic_analyzer_create();
    rava_semantic_analyze(analyzer, ast);

    RavaIRGenerator_t* ir_gen = rava_ir_generator_create(analyzer);
    RavaProgram_t* program = rava_ir_generate(ir_gen, ast);

    RavaVM_t* vm = rava_vm_create(program);

    if (!rava_vm_execute(vm, "Test", "main")) {
        printf("FAIL: %s - Runtime error: %s\n", name, vm->error_message ? vm->error_message : "unknown");
        rava_vm_destroy(vm);
        rava_program_destroy(program);
        rava_ir_generator_destroy(ir_gen);
        rava_semantic_analyzer_destroy(analyzer);
        rava_ast_node_destroy(ast);
        rava_parser_destroy(parser);
        rava_lexer_destroy(lexer);
        return;
    }

    RavaValue_t result = rava_vm_get_result(vm);
    int32_t result_int = rava_value_as_int(result);

    if (result_int == expected) {
        printf("PASS: %s (result=%d)\n", name, result_int);
        pass_count++;
    } else {
        printf("FAIL: %s (expected=%d, got=%d)\n", name, expected, result_int);
    }

    rava_vm_destroy(vm);
    rava_program_destroy(program);
    rava_ir_generator_destroy(ir_gen);
    rava_semantic_analyzer_destroy(analyzer);
    rava_ast_node_destroy(ast);
    rava_parser_destroy(parser);
    rava_lexer_destroy(lexer);
}

int main(void) {
    printf("=== Interface Tests ===\n\n");

    run_test_int("interface with implementing class",
        "interface Addable {\n"
        "    int add(int a, int b);\n"
        "}\n"
        "class Calculator implements Addable {\n"
        "    int add(int a, int b) {\n"
        "        return a + b;\n"
        "    }\n"
        "}\n"
        "public class Test {\n"
        "    public static int main() {\n"
        "        Calculator calc = new Calculator();\n"
        "        return calc.add(10, 20);\n"
        "    }\n"
        "}\n", 30);

    run_test_int("class implements multiple interfaces",
        "interface Addable {\n"
        "    int add(int a, int b);\n"
        "}\n"
        "interface Subtractable {\n"
        "    int subtract(int a, int b);\n"
        "}\n"
        "class Calculator implements Addable, Subtractable {\n"
        "    int add(int a, int b) {\n"
        "        return a + b;\n"
        "    }\n"
        "    int subtract(int a, int b) {\n"
        "        return a - b;\n"
        "    }\n"
        "}\n"
        "public class Test {\n"
        "    public static int main() {\n"
        "        Calculator calc = new Calculator();\n"
        "        return calc.add(100, 50) - calc.subtract(30, 10);\n"
        "    }\n"
        "}\n", 130);

    run_test_int("class extends and implements",
        "interface Printable {\n"
        "    int getValue();\n"
        "}\n"
        "class Base {\n"
        "    int baseValue;\n"
        "    Base() {\n"
        "        this.baseValue = 100;\n"
        "    }\n"
        "}\n"
        "class Derived extends Base implements Printable {\n"
        "    int getValue() {\n"
        "        return this.baseValue + 50;\n"
        "    }\n"
        "}\n"
        "public class Test {\n"
        "    public static int main() {\n"
        "        Derived d = new Derived();\n"
        "        return d.getValue();\n"
        "    }\n"
        "}\n", 150);

    run_test_int("empty interface",
        "interface Empty {\n"
        "}\n"
        "class MyClass implements Empty {\n"
        "    int getValue() {\n"
        "        return 42;\n"
        "    }\n"
        "}\n"
        "public class Test {\n"
        "    public static int main() {\n"
        "        MyClass obj = new MyClass();\n"
        "        return obj.getValue();\n"
        "    }\n"
        "}\n", 42);

    printf("\n=== Results: %d/%d tests passed ===\n", pass_count, test_count);

    return (pass_count == test_count) ? 0 : 1;
}