from gitevo import GitEvo, ParsedCommit


remote = 'https://github.com/expressjs/express'
# remote = 'https://github.com/facebook/react'
# remote = 'https://github.com/vercel/next.js'
# remote = 'https://github.com/sveltejs/svelte'
# remote = 'https://github.com/nodejs/node'

evo = GitEvo(repo=remote, extension='.js')

@evo.metric('Lines of code (LOC)', show_version_chart=False)
def loc(commit: ParsedCommit):
    return commit.loc

@evo.metric('JavaScript files', show_version_chart=False)
def files(commit: ParsedCommit):
    return len(commit.parsed_files)

@evo.metric('LOC / JavaScript files', show_version_chart=False)
def loc_per_file(commit: ParsedCommit):
    parsed_files = len(commit.parsed_files)
    if parsed_files == 0: return 0
    return commit.loc / parsed_files

@evo.metric('Classes', categorical=True)
def classes(commit: ParsedCommit):
    return commit.find_node_types(['class_declaration'])

@evo.metric('Variable declarations', categorical=True)
def variable_declarations(commit: ParsedCommit):
    return commit.find_node_types(['const', 'let', 'var'])

@evo.metric('Functions', categorical=True)
def functions(commit: ParsedCommit):
    method_nodes = ['function_declaration', 'method_definition', 'generator_function_declaration', 
                    'arrow_function', 'generator_function', 'function_expression']
    return commit.find_node_types(method_nodes)

@evo.metric('Conditionals', categorical=True)
def conditionals(commit: ParsedCommit):
    return commit.find_node_types(['if_statement', 'switch_statement', 'ternary_expression'])

@evo.metric('Loops', categorical=True)
def loops(commit: ParsedCommit):
    return commit.find_node_types(['for_statement', 'while_statement', 'for_in_statement', 'do_statement'])

@evo.metric('Exception statements', categorical=True)
def expections(commit: ParsedCommit):
    return commit.find_node_types(['try_statement', 'throw_statement'])

@evo.metric('Await expression', categorical=True, show_version_chart=False)
def await_expression(commit: ParsedCommit):
    return commit.find_node_types(['await_expression'])

@evo.metric('Comments', categorical=True, show_version_chart=False)
def comments(commit: ParsedCommit):
    return commit.find_node_types(['comment'])
    
def as_str(text: bytes) -> str:
    return text.decode('utf-8')

evo.run()
