#include <argparse.h>
#include <scc_lexer.h>
#include <scc_parser.h>
#include <scc_pproc.h>

#include <ast_dump.h>
#include <ir_dump.h>
#include <scc_ast2ir.h>
#include <scc_ir2mcode.h>
#include <sccf2pe.h>

#include "config.h"

static void print_ring(scc_lexer_tok_ring_t *ring, int verbose) {
    scc_lexer_tok_t tok = {0};
    int ret = 0;
    while (1) {
        scc_ring_next_consume(*ring, tok, ret);
        if (ret == false || tok.type == SCC_TOK_EOF) {
            break;
        }
        if (verbose == 0) {
            scc_printf("%s ", scc_get_tok_name(tok.type));
        } else if (verbose >= 1) {
            scc_printf(
                "token [%-8s] `%s` at %s:%d:%d\n", scc_get_tok_name(tok.type),
                tok.type != SCC_TOK_ENDLINE ? scc_str_as_cstr(&tok.lexeme)
                                            : "\\n",
                tok.loc.name, tok.loc.line, tok.loc.col);
        }
        scc_lexer_tok_drop(&tok);
    }
}

static void print_file(scc_lexer_tok_ring_t *ring, scc_file_t fp) {
    scc_lexer_tok_t tok = {0};
    int ret = 0;

    while (1) {
        scc_ring_next_consume(*ring, tok, ret);
        if (ret == false || tok.type == SCC_TOK_EOF) {
            break;
        }
        if (fp == scc_stdout) {
            scc_printf("%s", scc_str_as_cstr(&tok.lexeme));
        } else {
            usize ret = scc_fwrite(fp, scc_str_as_cstr(&tok.lexeme),
                                   scc_str_len(&tok.lexeme));
            if (ret != scc_str_len(&tok.lexeme)) {
                LOG_FATAL("Failed to write to file");
            }
        }
        scc_lexer_tok_drop(&tok);
    }
    scc_fclose(fp);
}

static void tree_dump_output(const char *str, usize len, void *user) {
    scc_fprintf(user, "%.*s", (int)len, str);
}

void init_platform(void);

int main(int argc, const char **argv, const char **envp) {
    init_platform();

#ifndef SCC_DEFAULT_ARGPARSE_LANG
#define SCC_DEFAULT_ARGPARSE_LANG SCC_ARGPARSE_LANG_ZH
#endif

    scc_argparse_lang_t argparse_lang = SCC_DEFAULT_ARGPARSE_LANG;
    for (const char **env = envp; *env != nullptr; env++) {
        const char *env_str = *env;
        if (scc_strcmp(env_str, "LANG=zh_CN.UTF-8") == 0) {
            argparse_lang = SCC_ARGPARSE_LANG_ZH;
        }
    }

    scc_config_t config = {
        .input_file = nullptr,
        .verbose = 0,
        .output_file = nullptr,
        .emit_ast = false,
        .emit_ir = false,
        .target_description = "x86_64-pc-windows-msvc",
    };
    scc_vec_init(config.include_paths);

    scc_argparse_t argparse;
    setup_argparse(&argparse, &config, argparse_lang);
    int ret = scc_argparse_parse(&argparse, argc, argv);
    if (ret != 0) {
        scc_argparse_drop(&argparse);
        return 0;
    }
    scc_argparse_drop(&argparse);

    scc_file_t fp = nullptr;
    if (config.output_file) {
        cbool is_stdout = scc_strcmp(config.output_file, "-") == 0;
        if (!is_stdout) {
            fp = scc_fopen(config.output_file, SCC_FILE_WRITE);
            if (fp == nullptr) {
                LOG_FATAL("Failed to open file %s", config.output_file);
                return 1;
            }
        } else {
            fp = scc_stdout;
        }
    }

    int error_code = 0;
    cbool need_end = false;
    scc_sstream_t sstream;
    error_code = scc_sstream_init(&sstream, config.input_file, 1024);
    if (error_code) {
        goto sstream_drop;
        need_end = true;
    }

    scc_lexer_t lexer;
    scc_lexer_init(&lexer, scc_sstream_to_ring(&sstream));
    if (config.emit_lex) {
        scc_lexer_tok_ring_t *tok_ring =
            scc_lexer_to_ring(&lexer, 8, fp == nullptr ? false : true);
        if (fp == nullptr) {
            print_ring(tok_ring, config.verbose);
        } else {
            print_file(tok_ring, fp);
        }
        need_end = true;
        goto lexer_drop;
    }

    scc_pproc_t pproc;
    scc_pproc_init(&pproc, scc_lexer_to_ring(&lexer, 8, true));
    // FIXME maybe using config to got download path and add include path
    scc_pproc_add_include_path_cstr(&pproc, "./.scc_include");
    scc_vec_foreach(config.include_paths, i) {
        scc_pproc_add_include_path_cstr(&pproc,
                                        scc_vec_at(config.include_paths, i));
    }
    scc_lexer_tok_vec_t pproc_tok_vec;
    scc_vec_init(pproc_tok_vec);
    scc_lexer_tok_t tok = {
        .lexeme = scc_str_from_cstr("1"),
        .type = SCC_TOK_INT_LITERAL,
        .loc.name = "<internal>",
        .loc.line = 0,
        .loc.col = 0,
        .loc.offset = 0,
    };
    scc_vec_push(pproc_tok_vec, tok);
    scc_str_t pproc_predefined_macros[] = {
        scc_str_from_cstr("__SCC__"),
        scc_str_from_cstr("_WIN64"),
        scc_str_from_cstr("__x86_64__"),
    };
    for (usize i = 0; i < SCC_ARRLEN(pproc_predefined_macros); i += 1) {
        scc_vec_init(pproc_tok_vec);
        scc_lexer_tok_t coped_tok = scc_lexer_tok_copy(&tok);
        scc_vec_push(pproc_tok_vec, coped_tok);
        scc_pproc_add_object_macro(&pproc.macro_table,
                                   &pproc_predefined_macros[i], &pproc_tok_vec);
    }
    if (config.emit_pp) {
        scc_lexer_tok_ring_t *tok_ring =
            scc_pproc_to_ring(&pproc, 8, true, true);
        if (fp == nullptr) {
            print_ring(tok_ring, config.verbose);
        } else {
            print_file(tok_ring, fp);
        }
        need_end = true;
        goto pproc_drop;
    }

    scc_lexer_tok_ring_t *tok_ring =
        scc_pproc_to_ring(&pproc, 1024, false, false);
    scc_parser_t parser;
    scc_sema_callbacks_t sema_callbacks;
    scc_sema_init(&sema_callbacks);
    scc_parser_init(&parser, tok_ring, &sema_callbacks);
    scc_ast_translation_unit_t *translation_unit =
        scc_parse_translation_unit(&parser);

    scc_sema_drop(&sema_callbacks);
    scc_parser_drop(&parser);
pproc_drop:
    scc_pproc_drop(&pproc);
lexer_drop:
    scc_lexer_drop(&lexer);
sstream_drop:
    scc_sstream_drop(&sstream);
    if (error_code || need_end) {
        return error_code;
    }

    if (config.emit_ast) {
        scc_tree_dump_t tree_dump;
        if (fp == nullptr) {
            scc_tree_dump_init(&tree_dump, true);
        } else {
            scc_tree_dump_init(&tree_dump, false);
        }
        scc_ast_dump_node(&tree_dump, (scc_ast_node_t *)translation_unit);
        scc_tree_dump_flush(&tree_dump, tree_dump_output,
                            fp == nullptr ? scc_stdout : fp);
        scc_tree_dump_drop(&tree_dump);
        return 0;
    }

    scc_ast2ir_ctx_t ast2ir_ctx;
#include <abi/win_x64_type_abi.h>
    scc_ir_cprog_t cprog;
    scc_ir_cprog_init(&cprog);
    scc_ast2ir_ctx_init(&ast2ir_ctx, scc_win_x64_type_abi, &cprog);
    scc_ast2ir_translation_unit(&ast2ir_ctx, translation_unit);
    scc_ast2ir_ctx_drop(&ast2ir_ctx);

    if (config.emit_ir) {
        scc_ir_dump_ctx_t ir_dump_ctx;
        scc_tree_dump_t tree_dump;
        if (fp == nullptr) {
            scc_tree_dump_init(&tree_dump, true);
        } else {
            scc_tree_dump_init(&tree_dump, false);
        }
        scc_ir_dump_ctx_init(&ir_dump_ctx, &tree_dump, &cprog);
        // scc_ir_dump_cprog(&ir_dump_ctx);
        scc_ir_dump_cprog_linear(&ir_dump_ctx);

        scc_tree_dump_flush(&tree_dump, tree_dump_output,
                            fp == nullptr ? scc_stdout : fp);
        scc_tree_dump_drop(&tree_dump);
        return 0;
    }

    scc_ir2mcode_ctx_t ir2mcode_ctx;
    sccf_builder_t sccf_builder;
    scc_ir2mcode_init(&ir2mcode_ctx, &cprog, &sccf_builder,
                      SCC_MCODE_ARCH_AMD64);
    scc_ir2mcode(&ir2mcode_ctx);
    scc_ir2mcode_drop(&ir2mcode_ctx);

    const sccf_t *sccf = sccf_builder_to_sccf(&sccf_builder);
    scc_pe_builder_t pe_builder;
    sccf2pe(&pe_builder, sccf);

    if (fp == nullptr) {
        scc_printf("output exe at %s\n", config.output_file);
    } else {
        scc_pe_dump_to_file(&pe_builder, config.output_file);
    }

    return 0;
}