#define READARG_IMPLEMENTATION
#define READARG_DEBUG

#include <stdio.h>

#include "../readarg.h"

enum opt {
    OPT_HELP,
    OPT_VERSION,
};

static int write_callback(void *ctx, const char *buf, size_t len);

int main(int argc, char **argv) {
    const char *progname = argv[0] == NULL ? "test" : argv[0];

    struct readarg_helpgen_writer writer = {
        .write = write_callback,
        .ctx = NULL,
    };

    struct readarg_opt opts[] = {
        [OPT_HELP] = {
            .names = {
                [READARG_FORM_LONG] = READARG_STRINGS("help"),
            },
            .arg.bounds.val = {
                1,
            },
        },
        [OPT_VERSION] = {
            .names = {
                [READARG_FORM_SHORT] = READARG_STRINGS("V"),
                [READARG_FORM_LONG] = READARG_STRINGS("version"),
            },
            .arg.bounds.val = {
                1,
            },
        },
        {
            .names = {
                [READARG_FORM_SHORT] = READARG_STRINGS("e", "x"),
                [READARG_FORM_LONG] = READARG_STRINGS("expr", "expression"),
            },
            .arg = {
                .name = "expression",
                .bounds.val = {
                    1,
                    4,
                },
            },
        },
        {
            .names = {
                [READARG_FORM_SHORT] = READARG_STRINGS("c"),
                [READARG_FORM_LONG] = READARG_STRINGS("config"),
            },
            .arg = {
                .name = "file",
                .bounds.val = {
                    2,
                },
            },
        },
        {
            .names = {
                [READARG_FORM_SHORT] = READARG_STRINGS("i"),
                [READARG_FORM_LONG] = READARG_STRINGS("uri"),
            },
            .arg = {
                .name = "uri",
                .bounds.inf = 1,
            },
        },
        {
            .names = {
                [READARG_FORM_SHORT] = READARG_STRINGS("b"),
                [READARG_FORM_LONG] = READARG_STRINGS("backup", "backup-file"),
            },
            .arg = {
                .name = "file",
                .bounds.inf = 1,
            },
        },
        {
            .names = {
                [READARG_FORM_SHORT] = READARG_STRINGS("v"),
                [READARG_FORM_LONG] = READARG_STRINGS("verbose"),
            },
            .arg.bounds.val = {
                3,
            },
        },
        {
            .names = {
                [READARG_FORM_SHORT] = READARG_STRINGS("s"),
                [READARG_FORM_LONG] = READARG_STRINGS("sort"),
            },
            .arg.bounds.inf = 1,
        },
    };

    struct readarg_arg opers[] = {
        {
            .name = "pattern",
            .bounds.inf = 1,
        },
        {
            .name = "file",
            .bounds = {
                .val = {
                    1,
                },
                .inf = 1,
            },
        },
        {
            .name = "name",
            .bounds = {
                .val = {
                    1,
                },
                .inf = 1,
            },
        },
    };

    struct readarg_parser rp;
    readarg_parser_init(&rp, opts, sizeof opts / sizeof *opts, opers, sizeof opers / sizeof *opers,
                        (struct readarg_view_strings){
                            .strings = (const char **)argv + 1,
                            .len = argc - 1,
                        });

    while (readarg_parse(&rp));
    if (rp.error != READARG_ESUCCESS) {
        fprintf(stderr, "Error: %d\n", rp.error);
        readarg_helpgen_put_usage(&rp, &writer, progname, "Usage");
        return 1;
    }

    if (rp.opts[OPT_HELP].arg.val.len >= 1) {
        readarg_helpgen_put_usage(&rp, &writer, progname, "Usage");
        return 0;
    }

    if (rp.opts[OPT_VERSION].arg.val.len >= 1) {
        printf("0.0.0\n");
        return 0;
    }

    struct readarg_opt *erropt = readarg_validate_opts(&rp);
    if (erropt != NULL) {
        fprintf(stderr, "Error: %d\n", rp.error);
        readarg_helpgen_put_usage(&rp, &writer, progname, "Usage");
        return 1;
    }

    readarg_assign_opers(&rp);
    if (rp.error != READARG_ESUCCESS) {
        fprintf(stderr, "Error: %d\n", rp.error);
        readarg_helpgen_put_usage(&rp, &writer, progname, "Usage");
        return 1;
    }

    printf("opt:\n");
    {
        struct readarg_opt *curr = rp.opts;
        for (size_t i = 0; i < rp.nopts; i++) {
            for (size_t j = 0; j < sizeof curr[i].names / sizeof *curr[i].names; j++) {
                if (curr[i].names[j]) {
                    for (size_t k = 0; curr[i].names[j][k]; k++) {
                        printf("%s ", curr[i].names[j][k]);
                    }
                }
            }
            printf("{ [%zu] ", curr[i].arg.val.len);
            if (curr[i].arg.name) {
                struct readarg_view_strings val = curr[i].arg.val;
                for (size_t j = 0; j < val.len; j++) {
                    printf("%s ", val.strings[j]);
                }
            }
            printf("}\n");
        }
    }

    printf("oper:\n");
    {
        struct readarg_arg *curr = rp.opers;
        for (size_t i = 0; i < rp.nopers; i++) {
            printf("%s { [%zu] ", curr[i].name, curr[i].val.len);
            for (size_t j = 0; j < curr[i].val.len; j++) {
                printf("%s ", curr[i].val.strings[j]);
            }
            printf("}\n");
        }
    }

    return 0;
}

static int write_callback(void *ctx, const char *buf, size_t len) {
    (void)ctx;
    return fwrite(buf, 1, len, stderr) == len;
}