#include <stdio.h>

#include "parser.h"

typedef struct {
    uint32_t len;
    astNodeIndex lhs, rhs;
    bool trailing;
} members;

typedef struct {
    enum {
        FIELD_STATE_NONE,
        FIELD_STATE_SEEN,
        FIELD_STATE_END // sets "end"
    } tag;
    union {
        uint32_t end;
    } payload;
} field_state;

static astTokenIndex next_token(parser* p)
{
    return ++p->tok_i;
}

static astTokenIndex eat_token(parser* p, tokenizerTag tag)
{
    return (p->token_tags[p->tok_i] == tag) ? next_token(p) : -1;
}

static members parse_container_members(parser* p)
{
    const uint32_t scratch_top = p->scratch.len;
    members res = (members) {};
    // ast_token_index last_field;
    while (eat_token(p, TOKENIZER_TAG_CONTAINER_DOC_COMMENT) != -1)
        ;

    // bool trailing = false;
    while (1) {

        // SKIP eat doc comments

        switch (p->token_tags[p->tok_i]) {
        case TOKENIZER_TAG_INVALID:
        case TOKENIZER_TAG_INVALID_PERIODASTERISKS:
        case TOKENIZER_TAG_IDENTIFIER:
        case TOKENIZER_TAG_STRING_LITERAL:
        case TOKENIZER_TAG_MULTILINE_STRING_LITERAL_LINE:
        case TOKENIZER_TAG_CHAR_LITERAL:
        case TOKENIZER_TAG_EOF:
        case TOKENIZER_TAG_BUILTIN:
        case TOKENIZER_TAG_BANG:
        case TOKENIZER_TAG_PIPE:
        case TOKENIZER_TAG_PIPE_PIPE:
        case TOKENIZER_TAG_PIPE_EQUAL:
        case TOKENIZER_TAG_EQUAL:
        case TOKENIZER_TAG_EQUAL_EQUAL:
        case TOKENIZER_TAG_EQUAL_ANGLE_BRACKET_RIGHT:
        case TOKENIZER_TAG_BANG_EQUAL:
        case TOKENIZER_TAG_L_PAREN:
        case TOKENIZER_TAG_R_PAREN:
        case TOKENIZER_TAG_SEMICOLON:
        case TOKENIZER_TAG_PERCENT:
        case TOKENIZER_TAG_PERCENT_EQUAL:
        case TOKENIZER_TAG_L_BRACE:
        case TOKENIZER_TAG_R_BRACE:
        case TOKENIZER_TAG_L_BRACKET:
        case TOKENIZER_TAG_R_BRACKET:
        case TOKENIZER_TAG_PERIOD:
        case TOKENIZER_TAG_PERIOD_ASTERISK:
        case TOKENIZER_TAG_ELLIPSIS2:
        case TOKENIZER_TAG_ELLIPSIS3:
        case TOKENIZER_TAG_CARET:
        case TOKENIZER_TAG_CARET_EQUAL:
        case TOKENIZER_TAG_PLUS:
        case TOKENIZER_TAG_PLUS_PLUS:
        case TOKENIZER_TAG_PLUS_EQUAL:
        case TOKENIZER_TAG_PLUS_PERCENT:
        case TOKENIZER_TAG_PLUS_PERCENT_EQUAL:
        case TOKENIZER_TAG_PLUS_PIPE:
        case TOKENIZER_TAG_PLUS_PIPE_EQUAL:
        case TOKENIZER_TAG_MINUS:
        case TOKENIZER_TAG_MINUS_EQUAL:
        case TOKENIZER_TAG_MINUS_PERCENT:
        case TOKENIZER_TAG_MINUS_PERCENT_EQUAL:
        case TOKENIZER_TAG_MINUS_PIPE:
        case TOKENIZER_TAG_MINUS_PIPE_EQUAL:
        case TOKENIZER_TAG_ASTERISK:
        case TOKENIZER_TAG_ASTERISK_EQUAL:
        case TOKENIZER_TAG_ASTERISK_ASTERISK:
        case TOKENIZER_TAG_ASTERISK_PERCENT:
        case TOKENIZER_TAG_ASTERISK_PERCENT_EQUAL:
        case TOKENIZER_TAG_ASTERISK_PIPE:
        case TOKENIZER_TAG_ASTERISK_PIPE_EQUAL:
        case TOKENIZER_TAG_ARROW:
        case TOKENIZER_TAG_COLON:
        case TOKENIZER_TAG_SLASH:
        case TOKENIZER_TAG_SLASH_EQUAL:
        case TOKENIZER_TAG_COMMA:
        case TOKENIZER_TAG_AMPERSAND:
        case TOKENIZER_TAG_AMPERSAND_EQUAL:
        case TOKENIZER_TAG_QUESTION_MARK:
        case TOKENIZER_TAG_ANGLE_BRACKET_LEFT:
        case TOKENIZER_TAG_ANGLE_BRACKET_LEFT_EQUAL:
        case TOKENIZER_TAG_ANGLE_BRACKET_ANGLE_BRACKET_LEFT:
        case TOKENIZER_TAG_ANGLE_BRACKET_ANGLE_BRACKET_LEFT_EQUAL:
        case TOKENIZER_TAG_ANGLE_BRACKET_ANGLE_BRACKET_LEFT_PIPE:
        case TOKENIZER_TAG_ANGLE_BRACKET_ANGLE_BRACKET_LEFT_PIPE_EQUAL:
        case TOKENIZER_TAG_ANGLE_BRACKET_RIGHT:
        case TOKENIZER_TAG_ANGLE_BRACKET_RIGHT_EQUAL:
        case TOKENIZER_TAG_ANGLE_BRACKET_ANGLE_BRACKET_RIGHT:
        case TOKENIZER_TAG_ANGLE_BRACKET_ANGLE_BRACKET_RIGHT_EQUAL:
        case TOKENIZER_TAG_TILDE:
        case TOKENIZER_TAG_NUMBER_LITERAL:
        case TOKENIZER_TAG_DOC_COMMENT:
        case TOKENIZER_TAG_CONTAINER_DOC_COMMENT:
        case TOKENIZER_TAG_KEYWORD_ADDRSPACE:
        case TOKENIZER_TAG_KEYWORD_ALIGN:
        case TOKENIZER_TAG_KEYWORD_ALLOWZERO:
        case TOKENIZER_TAG_KEYWORD_AND:
        case TOKENIZER_TAG_KEYWORD_ANYFRAME:
        case TOKENIZER_TAG_KEYWORD_ANYTYPE:
        case TOKENIZER_TAG_KEYWORD_ASM:
        case TOKENIZER_TAG_KEYWORD_ASYNC:
        case TOKENIZER_TAG_KEYWORD_AWAIT:
        case TOKENIZER_TAG_KEYWORD_BREAK:
        case TOKENIZER_TAG_KEYWORD_CALLCONV:
        case TOKENIZER_TAG_KEYWORD_CATCH:
        case TOKENIZER_TAG_KEYWORD_COMPTIME:
        case TOKENIZER_TAG_KEYWORD_CONST:
        case TOKENIZER_TAG_KEYWORD_CONTINUE:
        case TOKENIZER_TAG_KEYWORD_DEFER:
        case TOKENIZER_TAG_KEYWORD_ELSE:
        case TOKENIZER_TAG_KEYWORD_ENUM:
        case TOKENIZER_TAG_KEYWORD_ERRDEFER:
        case TOKENIZER_TAG_KEYWORD_ERROR:
        case TOKENIZER_TAG_KEYWORD_EXPORT:
        case TOKENIZER_TAG_KEYWORD_EXTERN:
        case TOKENIZER_TAG_KEYWORD_FN:
        case TOKENIZER_TAG_KEYWORD_FOR:
        case TOKENIZER_TAG_KEYWORD_IF:
        case TOKENIZER_TAG_KEYWORD_INLINE:
        case TOKENIZER_TAG_KEYWORD_NOALIAS:
        case TOKENIZER_TAG_KEYWORD_NOINLINE:
        case TOKENIZER_TAG_KEYWORD_NOSUSPEND:
        case TOKENIZER_TAG_KEYWORD_OPAQUE:
        case TOKENIZER_TAG_KEYWORD_OR:
        case TOKENIZER_TAG_KEYWORD_ORELSE:
        case TOKENIZER_TAG_KEYWORD_PACKED:
        case TOKENIZER_TAG_KEYWORD_RESUME:
        case TOKENIZER_TAG_KEYWORD_RETURN:
        case TOKENIZER_TAG_KEYWORD_LINKSECTION:
        case TOKENIZER_TAG_KEYWORD_STRUCT:
        case TOKENIZER_TAG_KEYWORD_SUSPEND:
        case TOKENIZER_TAG_KEYWORD_SWITCH:
        case TOKENIZER_TAG_KEYWORD_TEST:
        case TOKENIZER_TAG_KEYWORD_THREADLOCAL:
        case TOKENIZER_TAG_KEYWORD_TRY:
        case TOKENIZER_TAG_KEYWORD_UNION:
        case TOKENIZER_TAG_KEYWORD_UNREACHABLE:
        case TOKENIZER_TAG_KEYWORD_USINGNAMESPACE:
        case TOKENIZER_TAG_KEYWORD_VAR:
        case TOKENIZER_TAG_KEYWORD_VOLATILE:
        case TOKENIZER_TAG_KEYWORD_WHILE:;
            const char* str = tokenizerTagString[p->token_tags[p->tok_i]];
            fprintf(stderr, "keyword %s not implemented\n", str);
            goto cleanup;
        case TOKENIZER_TAG_KEYWORD_PUB:
            p->tok_i++;
            break;
            // TODO do work
        }
    }

cleanup:
    p->scratch.len = scratch_top;
    return res;
}

int parse_root(parser* p)
{
    p->nodes.tags[p->nodes.len++] = AST_NODE_TAG_ROOT;
    p->nodes.main_tokens[p->nodes.len] = 0;

    // members root_members = parse_container_members(p);

    return 0;
}