import re
import tomllib
from enum import StrEnum
from pathlib import Path
from typing import Any

import click
from rich.console import Console
from rich.panel import Panel
from rich.table import Table
from rich.traceback import install

install(extra_lines=0, max_frames=10)


class VersionLevel(StrEnum):
    MAJOR = "major"
    MINOR = "minor"
    PATCH = "patch"
    ALPHA = "alpha"
    BETA = "beta"
    RC = "rc"
    DEV = "dev"
    RELEASE = "release"


class SupportedBackend(StrEnum):
    POETRY = "poetry"
    UV = "uv"


def load_config():
    pyproject_path = Path.cwd() / "pyproject.toml"
    if pyproject_path.exists():
        with open(pyproject_path, "rb") as f:
            pyproject_data = tomllib.load(f)
            config = pyproject_data.get("tool", {}).get("versioning", {}).get("files")

            backend = (
                pyproject_data.get("tool", {}).get("versioning", {}).get("backend")
            )
            if backend is None:
                raise RuntimeError(
                    "`pyproject.toml` file doesn't contain `tool.versioning.backend` property."
                )
            match SupportedBackend(backend):
                case SupportedBackend.POETRY:
                    version = (
                        pyproject_data.get("tool", {}).get("poetry", {}).get("version")
                    )
                case SupportedBackend.UV:
                    version = pyproject_data.get("project", {}).get("version")

            if version is None:
                raise RuntimeError(
                    "`pyproject.toml` file doesn't contain `version` property."
                )

            return version, config
    else:
        raise RuntimeError("Unable to locate `pyproject.toml` file.")


def parse_version(version) -> dict[str, str | Any]:
    VERSION_PATTERN = re.compile(
        r"^"
        r"(?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)"
        r"(?:(?P<pre_type>a|b|rc)(?P<pre_num>\d+))?"
        r"(?:\.post(?P<post>\d+))?"
        r"(?:\.dev(?P<dev>\d+))?"
        r"$"
    )

    pattern_match = VERSION_PATTERN.match(version)
    if pattern_match:
        return pattern_match.groupdict()
    else:
        raise ValueError(
            f"Invalid version format {version}. Expected format: MAJOR.MINOR.PATCH[preTYPE[preNUM][.dev]]"
        )


def find_substring_index(strings: list[str], substring: str) -> int:
    return next(i for i, string in enumerate(strings) if substring in string)


def find_variable_and_replace_value_in_file(
    file_name: str,
    variable_name: str,
    new_value: str,
    dry_run: bool,
    return_changed_line_number: bool = False,
) -> None | int:
    file = Path.cwd() / file_name
    text = file.read_text().splitlines(keepends=True)
    line_index = find_substring_index(text, variable_name)
    text[line_index] = text[line_index].replace(
        re.search(f"{variable_name}.*$", text[line_index]).group(0),
        variable_name + " = " + f'"{new_value}"',
    )

    if not dry_run:
        file.write_text("".join(text))

    if return_changed_line_number:
        return line_index + 1


def sync_version_in_different_files(
    version, config, dry_run: bool
) -> list[dict[str, int | str]]:
    files_synced = []
    if "version_variable" in config:
        for value in config.get("version_variable"):
            file_name = value.split(":")[0]
            variable_name = value.split(":")[1]

            line_number = find_variable_and_replace_value_in_file(
                file_name,
                variable_name,
                version,
                dry_run,
                return_changed_line_number=True,
            )

            files_synced.append(
                {
                    "file_path": file_name,
                    "line_number": line_number,
                }
            )

    return files_synced


def versioning(level: VersionLevel, current_version: str, dry_run: bool) -> str:
    version_parts = parse_version(current_version)

    match level:
        case VersionLevel.MAJOR:
            new_version = f"{int(version_parts['major']) + 1}.0.0"
        case VersionLevel.MINOR:
            new_version = (
                f"{version_parts['major']}.{int(version_parts['minor']) + 1}.0"
            )
        case VersionLevel.PATCH:
            new_version = f"{version_parts['major']}.{version_parts['minor']}.{int(version_parts['patch']) + 1}"
        case VersionLevel.ALPHA | VersionLevel.BETA | VersionLevel.RC:
            pre_type_map = {
                VersionLevel.ALPHA: "a",
                VersionLevel.BETA: "b",
                VersionLevel.RC: "rc",
            }

            if version_parts["pre_type"] == pre_type_map[level]:
                pre_num = int(version_parts["pre_num"] or 0) + 1
            else:
                pre_num = 1

            new_version = f"{version_parts['major']}.{version_parts['minor']}.{version_parts['patch']}{pre_type_map[level]}{pre_num}"
        case VersionLevel.DEV:
            if version_parts["pre_type"] and version_parts["pre_num"]:
                pre_parts = f"{version_parts['pre_type']}{version_parts['pre_num']}"
            else:
                pre_parts = ""

            dev_num = int(version_parts["dev"] or 0) + 1
            new_version = f"{version_parts['major']}.{version_parts['minor']}.{version_parts['patch']}{pre_parts}.dev{dev_num}"
        case VersionLevel.RELEASE:
            if (
                version_parts["pre_type"]
                or version_parts["pre_num"]
                or version_parts["dev"]
            ):
                new_version = f"{version_parts['major']}.{version_parts['minor']}.{version_parts['patch']}"
            else:
                raise ValueError(
                    f"The project is already on release version {current_version}"
                )

    if not dry_run:
        find_variable_and_replace_value_in_file(
            "pyproject.toml", "version", new_version, dry_run=False
        )

    return new_version


def display_update_summary(
    console: Console, files_synced: list[dict[str, int | str]]
) -> None:
    grid = Table.grid()
    grid.add_column(justify="center")

    for sync_infomation in files_synced:
        grid.add_row(
            f"Synced version updates in file [cyan]`{sync_infomation['file_path']}`[/cyan] at line [cyan]{sync_infomation['line_number']}[/cyan]"
        )

    console.print(
        Panel(grid, title="Version Update Summary", border_style="blue", padding=(1, 2))
    )


@click.command()
@click.argument(
    "level", type=click.Choice([vl.value for vl in VersionLevel], case_sensitive=False)
)
@click.option(
    "--show-summary",
    "-s",
    is_flag=True,
    help="Show what files changed",
)
@click.option(
    "--dry-run",
    "-d",
    is_flag=True,
    help="Show what would be done without making changes",
)
def main(level: str, show_summary: bool, dry_run: bool):
    console = Console()

    current_version, versioning_config = load_config()
    new_version = versioning(VersionLevel(level), current_version, dry_run)
    files_synced = sync_version_in_different_files(
        new_version, versioning_config, dry_run
    )

    if dry_run:
        console.print(
            f"[yellow]Dry Run[/yellow]: Bumped version: [bold cyan]{current_version}[/bold cyan] :arrow_right: [bold green]{new_version}[/bold green]"
        )
    else:
        console.print(
            f"Bumped version: [bold cyan]{current_version}[/bold cyan] :arrow_right: [bold green]{new_version}[/bold green]"
        )

    if show_summary:
        display_update_summary(console, files_synced)


if __name__ == "__main__":
    main()