#!/usr/bin/python
"""
Utility script that extracts tiles with the same class and
outputs C enum and functions for them (so there is no string checking).
"""

import json
import sys
import os
from collections import defaultdict

types = defaultdict(list)

path = sys.argv[1]
content = open(path).read()

tiles = json.loads(content)["tiles"]

for tile in tiles:
    if "type" not in tile:
        continue
    id = tile["id"]
    type = tile["type"]
    types[type].append(id)

enum_identifier = os.path.basename(path).split(".")[0].capitalize()
enum_name = enum_identifier.upper()

indent_level = 0
indent_offset = 4


def indent():
    return ' ' * indent_level


def enum_string(name):
    return f"{enum_name}_{name.upper()}"


script_name = os.path.basename(__file__)
print(f"// This file was generated by: {script_name}")
print()
print("#include <breeze.h>")
print("#include <string.h>")
print()
print()

# ============================

enum_none = enum_string("none")
enum_count = enum_string("count")

print(f"{indent()}typedef enum {enum_name} {{")
indent_level += indent_offset
print(f"{indent()}{enum_none},")
for enum in types:
    print(f"{indent()}{enum_string(enum)},")
print(f"{indent()}{enum_count}")
indent_level -= indent_offset
print(f"{indent()}}} {enum_name};")

print()
print()

# ============================

print(f"{indent()}static bool getTileBuilding(BzTile tile) {{")
indent_level += indent_offset
print(f"{indent()}switch (tile) {{")
for enum, ids in types.items():
    indent_level += indent_offset
    for id in ids:
        print(f"{indent()}case {id}:")

    indent_level += indent_offset
    print(f"{indent()} return {enum_string(enum)};")
    indent_level -= indent_offset

    indent_level -= indent_offset

indent_level += indent_offset
print(f"{indent()}default:")
indent_level += indent_offset
print(f"{indent()}return {enum_string('none')};")
indent_level -= indent_offset
indent_level -= indent_offset
print(f"{indent()}}}")
indent_level -= indent_offset
print(f"{indent()}}}")

print()

# ============================

print(f"{indent()}static {enum_name} getBuildingFromStr(const char *str) {{")
indent_level += indent_offset

# trie would be much better
for type in types:
    print(f"{indent()}if (strncmp(\"{type}\", str, {len(type)})) return {enum_string(type)};")
print(f"{indent()}else return {enum_string('none')};")

indent_level -= indent_offset
print(f"{indent()}}}")

# ============================