from __future__ import annotations

import argparse
import os
import re
import shutil
import subprocess
import sys
import tomllib
from dataclasses import dataclass
from pathlib import Path
from typing import Any, Mapping, Sequence

DEFAULT_FRAMEWORK_GIT = os.environ.get(
    "ITICLI_FRAMEWORK_GIT",
    "https://git.noahlan.cn/iti-framework/iTi-Flask.git",
)
DEFAULT_SYSTEM_GIT = os.environ.get(
    "ITICLI_SYSTEM_GIT",
    "https://git.noahlan.cn/iti-framework/iTi-System.git",
)
DEFAULT_COPIER_REF = os.environ.get("ITICLI_COPIER_REF", "HEAD")

ENV_NAMES = {"dev", "test", "prod", "default"}


class CliError(Exception):
    def __init__(self, message: str, code: int = 2) -> None:
        super().__init__(message)
        self.code = code


@dataclass(frozen=True)
class ProjectContext:
    root: Path
    kind: str
    pyproject: dict[str, Any]
    has_system: bool


def main(argv: Sequence[str] | None = None) -> int:
    parser = build_parser()
    args = parser.parse_args(argv)
    try:
        return int(args.handler(args))
    except CliError as exc:
        print(str(exc), file=sys.stderr)
        return exc.code


def build_parser() -> argparse.ArgumentParser:
    parser = argparse.ArgumentParser(
        prog="iticli",
        description="iTi-Flask framework and business project CLI.",
    )
    parser.set_defaults(handler=lambda _args: parser.print_help() or 0)

    subparsers = parser.add_subparsers(dest="command")

    help_parser = subparsers.add_parser("help", help="show help")
    help_parser.set_defaults(handler=lambda _args: parser.print_help() or 0)

    install_parser = subparsers.add_parser("install", help="install project dependencies")
    install_parser.add_argument(
        "profile",
        nargs="?",
        choices=["dev", "odbc"],
        help="dev installs project dev dependencies; odbc also installs pyodbc",
    )
    install_parser.set_defaults(handler=handle_install)

    test_parser = subparsers.add_parser("test", help="run tests")
    test_parser.set_defaults(handler=handle_test)

    add_run_parser(subparsers, "run")
    add_run_parser(subparsers, "serve")

    migrate_parser = subparsers.add_parser("migrate", help="run Alembic commands")
    migrate_parser.add_argument("action", nargs="?", help="upgrade target, heads, current, revision, ...")
    migrate_parser.add_argument("args", nargs=argparse.REMAINDER)
    migrate_parser.add_argument("-m", "--message", help="migration message for revision")
    migrate_parser.set_defaults(handler=handle_migrate)

    create_parser = subparsers.add_parser("create", help="create a business project")
    create_parser.add_argument("project_name", help="target directory or project name")
    create_parser.add_argument("--with-system", action="store_true", help="include iti-system")
    create_parser.add_argument("--target", help="target directory, defaults to project_name")
    create_parser.add_argument("--slug", help="distribution/project slug, defaults to target basename")
    create_parser.add_argument("--display-name", help="business project display name")
    create_parser.add_argument(
        "--database",
        choices=["mysql", "postgresql"],
        default=None,
        help="database dialect rendered into the project, defaults to template value",
    )
    create_parser.add_argument("--source", help="Copier template source, defaults to iTi-Flask private Git")
    create_parser.add_argument("--ref", default=DEFAULT_COPIER_REF, help="Copier source ref, defaults to HEAD")
    create_parser.add_argument("--local", action="store_true", help="use current iTi-Flask framework checkout as template source")
    create_parser.add_argument("--framework-git", help="framework dependency Git URL rendered into the project")
    create_parser.add_argument("--framework-tag", help="framework dependency tag rendered into the project")
    create_parser.add_argument("--system-git", help="system dependency Git URL rendered into the project")
    create_parser.add_argument("--system-tag", help="system dependency tag rendered into the project")
    create_parser.set_defaults(handler=handle_create)

    release_parser = subparsers.add_parser("release", help="release iTi-Flask framework")
    release_parser.add_argument("version", nargs="?", help="target version, defaults to next patch")
    release_parser.set_defaults(handler=handle_release)

    update_parser = subparsers.add_parser("update", help="update iticli or framework packages")
    update_parser.add_argument("target", choices=["self", "framework", "system", "all"])
    update_parser.add_argument("--tag", help="target Git tag, defaults to latest semver tag")
    update_parser.set_defaults(handler=handle_update)

    template_parser = subparsers.add_parser("template", help="check or update Copier template")
    template_subparsers = template_parser.add_subparsers(dest="template_action", required=True)
    template_check = template_subparsers.add_parser("check", help="check template updates")
    template_check.set_defaults(handler=handle_template)
    template_update = template_subparsers.add_parser("update", help="apply template updates")
    template_update.set_defaults(handler=handle_template)

    init_parser = subparsers.add_parser("init", help="initialize a business project")
    init_parser.add_argument("scope", nargs="?", choices=["system"], help="only run system migration and seed")
    init_parser.set_defaults(handler=handle_init)

    docker_parser = subparsers.add_parser("docker", help="run Docker Compose commands")
    docker_parser.add_argument("action", choices=["build", "up", "down", "logs"])
    docker_parser.add_argument("--db", action="store_true", help="include docker-compose.with-db.yml")
    docker_parser.add_argument("--service", default="app", help="service name for logs")
    docker_parser.set_defaults(handler=handle_docker)

    return parser


def add_run_parser(subparsers: argparse._SubParsersAction[argparse.ArgumentParser], name: str) -> None:
    run_parser = subparsers.add_parser(name, help="run the app")
    run_parser.add_argument("env_or_port", nargs="?", help="dev, test, prod, or port")
    run_parser.add_argument("port", nargs="?", help="port when env is provided")
    run_parser.set_defaults(handler=handle_run)


def handle_install(args: argparse.Namespace) -> int:
    ctx = require_project()
    if args.profile == "odbc":
        extra_name = find_optional_extra(ctx.pyproject, ["odbc", "erp"])
        if extra_name:
            return run(["uv", "sync", "--extra", "dev", "--extra", extra_name], ctx.root)
        code = run(["uv", "sync", "--extra", "dev"], ctx.root)
        if code:
            return code
        return run(["uv", "pip", "install", "pyodbc>=5.3.0"], ctx.root)
    return run(["uv", "sync", "--extra", "dev"], ctx.root)


def handle_test(_args: argparse.Namespace) -> int:
    ctx = require_project()
    if ctx.kind == "business":
        return run(["uv", "run", "--extra", "dev", "pytest", "-q"], ctx.root)
    return run(["uv", "run", "pytest", "-q"], ctx.root)


def handle_run(args: argparse.Namespace) -> int:
    ctx = require_project()
    env_name, port = parse_run_args(args.env_or_port, args.port)
    env = {"APP_ENV": env_name}
    cmd = build_run_cmd(ctx, port)

    if env_name == "prod":
        cmd.extend(["--host", "0.0.0.0"])
    else:
        cmd.append("--reload")

    return run(cmd, ctx.root, extra_env=env)


def build_run_cmd(ctx: ProjectContext, port: str) -> list[str]:
    if ctx.kind == "framework":
        cmd = ["uv", "run", "python", "-m", "uvicorn", "iti.app:create_app", "--factory", "--port", port]
    else:
        cmd = ["uv", "run", "python", "-m", "uvicorn", "main:app", "--port", port]
    return cmd


def handle_migrate(args: argparse.Namespace) -> int:
    ctx = require_project()
    action = args.action
    rest = list(args.args or [])
    base_cmd = alembic_base_cmd(ctx)

    if not action:
        return run([*base_cmd, "upgrade", "head"], ctx.root)

    if action in {"revision", "migration"}:
        message = args.message or extract_message(rest) or " ".join(rest).strip()
        if not message:
            raise CliError('missing migration message, example: iticli migrate revision "alice add order table"')
        return run([*base_cmd, "revision", "--autogenerate", "-m", message], ctx.root)

    if action == "upgrade":
        target = rest[0] if rest else "head"
        return run([*base_cmd, "upgrade", target, *rest[1:]], ctx.root)

    if action in {"heads", "current", "history", "branches", "downgrade", "stamp", "show"}:
        return run([*base_cmd, action, *rest], ctx.root)

    return run([*base_cmd, "upgrade", action, *rest], ctx.root)


def handle_create(args: argparse.Namespace) -> int:
    cwd = Path.cwd()
    source = args.source or DEFAULT_FRAMEWORK_GIT
    if args.local:
        ctx = require_project({"framework"})
        source = str(ctx.root)

    target = Path(args.target or args.project_name).expanduser()
    if not target.is_absolute():
        target = cwd / target

    slug = args.slug or target.name
    display_name = args.display_name or target.name

    cmd = [
        "uvx",
        "copier",
        "copy",
        "--defaults",
        "--vcs-ref",
        args.ref,
        source,
        str(target),
        "-d",
        f"project_name={display_name}",
        "-d",
        f"project_slug={slug}",
        "-d",
        f"include_system={str(args.with_system).lower()}",
    ]
    if args.database is not None:
        cmd.extend(["-d", f"database_dialect={args.database}"])
    if args.framework_git:
        cmd.extend(["-d", f"framework_git={args.framework_git}"])
    if args.framework_tag is not None:
        cmd.extend(["-d", f"framework_tag={args.framework_tag}"])
    if args.system_git:
        cmd.extend(["-d", f"system_git={args.system_git}"])
    if args.system_tag is not None:
        cmd.extend(["-d", f"system_tag={args.system_tag}"])

    return run(cmd, cwd)


def handle_release(args: argparse.Namespace) -> int:
    ctx = require_project({"framework", "system"})
    if ctx.kind == "system":
        return release_system(ctx.root, args.version)
    return release_framework(ctx.root, args.version)


def handle_update(args: argparse.Namespace) -> int:
    if args.target == "self":
        return update_self()

    ctx = require_project({"business", "system"})
    updates = resolve_update_packages(ctx, args.target, args.tag)
    update_pyproject_git_tags(ctx.root, updates)
    if ctx.kind == "business" and ctx.has_system:
        ensure_uv_no_sources_package(ctx.root, "iti-flask")
    code = run(update_sync_cmd(ctx, updates), ctx.root)
    if code:
        return code
    if "iti-system" in updates:
        return sync_system_migrations(ctx)
    return 0


def resolve_update_packages(ctx: ProjectContext, target: str, tag_arg: str | None) -> dict[str, str]:
    if ctx.kind == "system":
        if target not in {"framework", "all"}:
            raise CliError("system package can only be updated from a business project")
        return {"iti-flask": normalize_git_tag(tag_arg) if tag_arg else latest_git_tag(DEFAULT_FRAMEWORK_GIT)}

    if target == "system" and not ctx.has_system:
        raise CliError("current business project does not depend on iti-system")

    if target == "framework":
        return {"iti-flask": normalize_git_tag(tag_arg) if tag_arg else latest_git_tag(DEFAULT_FRAMEWORK_GIT)}
    if target == "system":
        return {"iti-system": normalize_git_tag(tag_arg) if tag_arg else latest_git_tag(DEFAULT_SYSTEM_GIT)}
    if target == "all":
        updates = {"iti-flask": normalize_git_tag(tag_arg) if tag_arg else latest_git_tag(DEFAULT_FRAMEWORK_GIT)}
        if ctx.has_system:
            updates["iti-system"] = normalize_git_tag(tag_arg) if tag_arg else latest_git_tag(DEFAULT_SYSTEM_GIT)
        return updates

    raise CliError(f"unknown update target: {target}")


def update_sync_cmd(ctx: ProjectContext, updates: Mapping[str, str]) -> list[str]:
    cmd = ["uv", "sync", "--extra", "dev"]
    if ctx.kind == "business" and ctx.has_system:
        cmd.extend(["--no-sources-package", "iti-flask"])
    for package in updates:
        cmd.extend(["--upgrade-package", package])
    return cmd


def handle_template(args: argparse.Namespace) -> int:
    ctx = require_project({"business"})
    cmd = ["uvx", "copier", "update", "--defaults", "--vcs-ref", "HEAD", str(ctx.root)]
    if args.template_action == "check":
        cmd.insert(4, "--pretend")
    return run(cmd, ctx.root)


def handle_init(args: argparse.Namespace) -> int:
    ctx = require_project({"business"})
    if args.scope == "system":
        if not ctx.has_system:
            raise CliError("current business project does not depend on iti-system")
        code = sync_system_migrations(ctx)
        if code:
            return code
        code = run([*alembic_base_cmd(ctx), "upgrade", "head"], ctx.root)
        if code:
            return code
        return seed_system(ctx)

    code = run(["uv", "sync", "--extra", "dev"], ctx.root)
    if code:
        return code
    if ctx.has_system:
        code = sync_system_migrations(ctx)
        if code:
            return code
    code = run([*alembic_base_cmd(ctx), "upgrade", "head"], ctx.root)
    if code:
        return code
    if ctx.has_system:
        return seed_system(ctx)
    return 0


def handle_docker(args: argparse.Namespace) -> int:
    ctx = require_project({"business"})
    compose = ["docker", "compose"]
    if args.db:
        compose.extend(["-f", "docker-compose.yml", "-f", "docker-compose.with-db.yml"])

    if args.action == "build":
        return run([*compose, "build"], ctx.root)
    if args.action == "up":
        return run([*compose, "up", "-d", "--build"], ctx.root)
    if args.action == "down":
        return run([*compose, "down"], ctx.root)
    return run([*compose, "logs", "-f", args.service], ctx.root)


def require_project(allowed: set[str] | None = None) -> ProjectContext:
    ctx = detect_project(Path.cwd())
    if ctx.kind == "unknown":
        raise CliError("current directory is not an iTi-Flask framework or business project")
    if allowed and ctx.kind not in allowed:
        expected = " or ".join(sorted(allowed))
        raise CliError(f"command requires {expected} project, current project is {ctx.kind}")
    return ctx


def detect_project(cwd: Path) -> ProjectContext:
    root = find_project_root(cwd)
    if root is None:
        return ProjectContext(cwd, "unknown", {}, False)

    pyproject = read_pyproject(root / "pyproject.toml")
    project_name = str(pyproject.get("project", {}).get("name", ""))

    is_framework = (
        project_name == "iti-flask"
        and (root / "iti" / "app.py").is_file()
        and (root / "copier.yml").is_file()
    )
    has_flask = has_package(pyproject, "iti-flask")
    has_system = has_package(pyproject, "iti-system")
    is_business = (
        has_flask
        and (root / "main.py").is_file()
        and (root / "app").is_dir()
        and (root / "migrations" / "alembic.ini").is_file()
    )
    is_system = (
        project_name == "iti-system"
        and (root / "iti_system" / "module.py").is_file()
        and (root / "iti_system" / "cli.py").is_file()
    )

    if is_framework:
        kind = "framework"
    elif is_system:
        kind = "system"
    elif is_business:
        kind = "business"
    else:
        kind = "unknown"
    return ProjectContext(root, kind, pyproject, has_system)


def find_project_root(cwd: Path) -> Path | None:
    current = cwd.resolve()
    for path in (current, *current.parents):
        if (path / "pyproject.toml").is_file():
            return path
    return None


def read_pyproject(path: Path) -> dict[str, Any]:
    try:
        with path.open("rb") as file:
            return tomllib.load(file)
    except FileNotFoundError:
        return {}
    except tomllib.TOMLDecodeError as exc:
        raise CliError(f"invalid pyproject.toml: {exc}") from exc


def has_package(pyproject: dict[str, Any], package_name: str) -> bool:
    project = pyproject.get("project", {})
    dependencies = list(project.get("dependencies", []) or [])
    optional = project.get("optional-dependencies", {}) or {}
    for values in optional.values():
        dependencies.extend(values or [])

    normalized = package_name.lower().replace("_", "-")
    for dependency in dependencies:
        name = re.split(r"\s|@|>=|<=|==|~=|!=|>|<|\[", str(dependency), maxsplit=1)[0]
        if name.lower().replace("_", "-") == normalized:
            return True

    uv_sources = pyproject.get("tool", {}).get("uv", {}).get("sources", {}) or {}
    return normalized in {str(key).lower().replace("_", "-") for key in uv_sources}


def find_optional_extra(pyproject: dict[str, Any], names: Sequence[str]) -> str | None:
    optional = pyproject.get("project", {}).get("optional-dependencies", {}) or {}
    normalized = {str(name).lower().replace("_", "-"): str(name) for name in optional}
    for name in names:
        found = normalized.get(name.lower().replace("_", "-"))
        if found:
            return found
    return None


def parse_run_args(env_or_port: str | None, port_arg: str | None) -> tuple[str, str]:
    env_name = os.environ.get("APP_ENV", "dev")
    port = "8000"

    if env_or_port:
        if env_or_port in ENV_NAMES:
            env_name = "dev" if env_or_port == "default" else env_or_port
            port = port_arg or port
        elif env_or_port.isdigit():
            port = env_or_port
        else:
            env_name = env_or_port
            port = port_arg or port

    if port_arg and not env_or_port:
        port = port_arg
    if not str(port).isdigit():
        raise CliError(f"invalid port: {port}")
    return env_name, str(port)


def extract_message(rest: list[str]) -> str | None:
    for flag in ("-m", "--message"):
        if flag in rest:
            index = rest.index(flag)
            if index + 1 >= len(rest):
                raise CliError(f"{flag} requires a message")
            message = rest[index + 1]
            del rest[index : index + 2]
            return message
    for item in list(rest):
        if item.startswith("--message="):
            rest.remove(item)
            return item.partition("=")[2]
    return None


def alembic_base_cmd(ctx: ProjectContext) -> list[str]:
    cmd = ["uv", "run", "python", "-m", "alembic"]
    if ctx.kind == "business":
        cmd.extend(["-c", "migrations/alembic.ini"])
    return cmd


def sync_system_migrations(ctx: ProjectContext) -> int:
    return run(["uv", "run", "iti-system", "migrations", "sync", "--target", "migrations/versions"], ctx.root)


def seed_system(ctx: ProjectContext) -> int:
    return run(
        ["uv", "run", "iti-system", "seed", "system", "app:create_app"],
        ctx.root,
        extra_env={"PYTHONPATH": "."},
    )


def update_self() -> int:
    commands: list[list[str]] = []
    if shutil.which("uv"):
        commands.append(["uv", "tool", "upgrade", "iti-flask-cli"])
    if shutil.which("pipx"):
        commands.append(["pipx", "upgrade", "iti-flask-cli"])
    if not commands:
        raise CliError("uv or pipx is required to update iticli")

    for cmd in commands:
        code = run(cmd, Path.cwd())
        if code == 0:
            return 0
    raise CliError("failed to update iticli with uv tool or pipx")


def run(cmd: Sequence[str], cwd: Path, extra_env: dict[str, str] | None = None) -> int:
    env = project_env(cwd, extra_env)
    completed = subprocess.run(list(cmd), cwd=str(cwd), env=env, check=False)
    return int(completed.returncode)


def project_env(root: Path, extra_env: dict[str, str] | None = None) -> dict[str, str]:
    env = os.environ.copy()
    virtual_env = env.get("VIRTUAL_ENV")
    project_venv = root / ".venv"
    if virtual_env:
        try:
            same_venv = Path(virtual_env).resolve() == project_venv.resolve()
        except OSError:
            same_venv = False
        if not same_venv:
            env.pop("VIRTUAL_ENV", None)
    if extra_env:
        env.update(extra_env)
    return env


def release_framework(root: Path, version_arg: str | None) -> int:
    current_version = read_current_version(root / "iti" / "__about__.py")
    target_version = normalize_version(version_arg) if version_arg else bump_patch(current_version)
    target_tag = f"v{target_version}"

    if target_version == current_version:
        raise CliError(f"version already set to {target_version}")
    if not version_is_newer(current_version, target_version):
        raise CliError(f"target version must be newer than {current_version}")
    if git_output(root, ["status", "--porcelain"]).strip():
        raise CliError("working tree is not clean")

    branch = git_output(root, ["symbolic-ref", "--quiet", "--short", "HEAD"]).strip()
    if not branch:
        raise CliError("release requires a branch checkout")
    if subprocess.run(["git", "rev-parse", "--verify", "--quiet", f"refs/tags/{target_tag}"], cwd=root).returncode == 0:
        raise CliError(f"tag already exists: {target_tag}")

    code = run(["uv", "run", "pytest", "-q"], root)
    if code:
        return code

    write_framework_release_files(root, target_version)

    code = run(
        [
            "git",
            "add",
            "iti/__about__.py",
            "copier.yml",
            "copier-template/pyproject.toml.jinja",
            "README.md",
        ],
        root,
    )
    if code:
        return code
    code = run(["git", "commit", "-m", f"chore: release {target_tag}"], root)
    if code:
        return code
    code = run(["git", "tag", "-a", target_tag, "-m", f"release {target_tag}"], root)
    if code:
        return code
    code = run(["git", "push", "origin", branch, target_tag], root)
    if code:
        return code

    print(f"released {target_tag}")
    return 0


def release_system(root: Path, version_arg: str | None) -> int:
    current_version = read_current_version(root / "iti_system" / "__about__.py")
    target_version = normalize_version(version_arg) if version_arg else bump_patch(current_version)
    target_tag = f"v{target_version}"

    if target_version == current_version:
        raise CliError(f"version already set to {target_version}")
    if not version_is_newer(current_version, target_version):
        raise CliError(f"target version must be newer than {current_version}")
    if git_output(root, ["status", "--porcelain"]).strip():
        raise CliError("working tree is not clean")

    branch = git_output(root, ["symbolic-ref", "--quiet", "--short", "HEAD"]).strip()
    if not branch:
        raise CliError("release requires a branch checkout")
    if subprocess.run(["git", "rev-parse", "--verify", "--quiet", f"refs/tags/{target_tag}"], cwd=root).returncode == 0:
        raise CliError(f"tag already exists: {target_tag}")

    code = run(["uv", "run", "pytest", "-q"], root)
    if code:
        return code

    write_system_release_files(root, target_version)

    code = run(["git", "add", "iti_system/__about__.py", "pyproject.toml", "README.md"], root)
    if code:
        return code
    code = run(["git", "commit", "-m", f"chore: release {target_tag}"], root)
    if code:
        return code
    code = run(["git", "tag", "-a", target_tag, "-m", f"release {target_tag}"], root)
    if code:
        return code
    code = run(["git", "push", "origin", branch, target_tag], root)
    if code:
        return code

    print(f"released {target_tag}")
    return 0


def git_output(root: Path, args: Sequence[str]) -> str:
    completed = subprocess.run(
        ["git", *args],
        cwd=root,
        text=True,
        stdout=subprocess.PIPE,
        stderr=subprocess.PIPE,
        check=False,
    )
    if completed.returncode:
        raise CliError(completed.stderr.strip() or f"git {' '.join(args)} failed")
    return completed.stdout


def latest_git_tag(git_url: str) -> str:
    completed = subprocess.run(
        ["git", "ls-remote", "--tags", git_url],
        text=True,
        stdout=subprocess.PIPE,
        stderr=subprocess.PIPE,
        check=False,
    )
    if completed.returncode:
        raise CliError(completed.stderr.strip() or f"git ls-remote failed: {git_url}")
    return latest_git_tag_from_refs(completed.stdout, git_url)


def latest_git_tag_from_refs(refs: str, git_url: str = "remote") -> str:
    tags = git_tags_from_refs(refs)
    if not tags:
        raise CliError(f"no semver tags found in {git_url}")
    return max(tags, key=parse_version)


def git_tags_from_refs(refs: str) -> list[str]:
    tags: list[str] = []
    seen: set[str] = set()
    for line in refs.splitlines():
        parts = line.split()
        if len(parts) != 2 or parts[1].endswith("^{}"):
            continue
        tag = parts[1].rsplit("/", 1)[-1]
        try:
            parse_version(tag)
        except CliError:
            continue
        if tag not in seen:
            tags.append(tag)
            seen.add(tag)
    return tags


def normalize_git_tag(raw: str) -> str:
    return f"v{normalize_version(raw)}"


def update_pyproject_git_tags(root: Path, updates: Mapping[str, str]) -> None:
    path = root / "pyproject.toml"
    lines = path.read_text(encoding="utf-8").splitlines()
    updated = {package: False for package in updates}

    for index, line in enumerate(lines):
        for package, tag in updates.items():
            dependency_line = rewrite_dependency_git_line(line, package, tag)
            if dependency_line is not None:
                lines[index] = dependency_line
                updated[package] = True
                break
        else:
            for package, tag in updates.items():
                source_line = rewrite_uv_source_git_line(line, package, tag)
                if source_line is not None:
                    lines[index] = source_line
                    updated[package] = True
                    break

    missing = [package for package, is_updated in updated.items() if not is_updated]
    if missing:
        raise CliError(f"{', '.join(missing)} git dependency not found in {path}")
    path.write_text("\n".join(lines) + "\n", encoding="utf-8")


def ensure_uv_no_sources_package(root: Path, package: str) -> None:
    path = root / "pyproject.toml"
    lines = path.read_text(encoding="utf-8").splitlines()
    section_start = find_toml_section(lines, "[tool.uv]")
    if section_start is None:
        source_start = find_toml_section(lines, "[tool.uv.sources]")
        insert_at = source_start if source_start is not None else len(lines)
        block = ["[tool.uv]", f'no-sources-package = ["{package}"]', ""]
        lines[insert_at:insert_at] = block
        path.write_text("\n".join(lines) + "\n", encoding="utf-8")
        return

    section_end = next_toml_section(lines, section_start + 1)
    for index in range(section_start + 1, section_end):
        line = lines[index].strip()
        if not line.startswith("no-sources-package"):
            continue
        if re.search(rf'"{re.escape(package)}"|\'{re.escape(package)}\'', line):
            return
        if line.endswith("]"):
            lines[index] = f'{lines[index][:-1]}, "{package}"]'
            path.write_text("\n".join(lines) + "\n", encoding="utf-8")
            return
        raise CliError("cannot update multi-line tool.uv.no-sources-package")

    lines.insert(section_end, f'no-sources-package = ["{package}"]')
    path.write_text("\n".join(lines) + "\n", encoding="utf-8")


def find_toml_section(lines: Sequence[str], section: str) -> int | None:
    for index, line in enumerate(lines):
        if line.strip() == section:
            return index
    return None


def next_toml_section(lines: Sequence[str], start: int) -> int:
    for index in range(start, len(lines)):
        if re.match(r"\s*\[.+]\s*$", lines[index]):
            return index
    return len(lines)


def rewrite_dependency_git_line(line: str, package: str, tag: str) -> str | None:
    stripped = line.lstrip()
    indent = line[: len(line) - len(stripped)]
    if not stripped.startswith(('"', "'")):
        return None

    quote = stripped[0]
    end = stripped.find(quote, 1)
    if end < 0:
        return None

    dependency = stripped[1:end]
    name_part, separator, git_ref = dependency.partition("@ git+")
    if not separator or dependency_package_name(name_part) != package:
        return None

    git_url, _old_ref = split_git_url_ref(git_ref.strip())
    new_dependency = f"{name_part.rstrip()} @ git+{git_url}@{tag}"
    return f"{indent}{quote}{new_dependency}{quote}{stripped[end + 1:]}"


def rewrite_uv_source_git_line(line: str, package: str, tag: str) -> str | None:
    if not re.match(rf"^\s*{re.escape(package)}\s*=", line):
        return None
    match = re.search(r'git\s*=\s*"([^"]+)"', line)
    if not match:
        raise CliError(f"{package} source is not a git source")
    indent = line[: len(line) - len(line.lstrip())]
    return f'{indent}{package} = {{ git = "{match.group(1)}", tag = "{tag}" }}'


def dependency_package_name(name_part: str) -> str:
    return re.split(r"\[|\s", name_part.strip(), maxsplit=1)[0].lower().replace("_", "-")


def split_git_url_ref(value: str) -> tuple[str, str | None]:
    url, separator, ref = value.rpartition("@")
    if separator and ref and "/" not in ref and ":" not in ref:
        return url, ref
    return value, None


def read_current_version(about_file: Path) -> str:
    match = re.search(r'^__version__\s*=\s*"([^"]+)"', about_file.read_text(encoding="utf-8"), re.MULTILINE)
    if not match:
        raise CliError(f"version not found in {about_file}")
    return match.group(1)


def write_framework_release_files(root: Path, target_version: str) -> None:
    replace_first_line(
        root / "iti" / "__about__.py",
        lambda line: line.startswith("__version__ = "),
        f'__version__ = "{target_version}"',
    )
    replace_section_default(root / "copier.yml", "framework_tag:", f"  default: v{target_version}")
    replace_section_default(root / "copier.yml", "system_tag:", f"  default: v{target_version}")
    replace_first_line(
        root / "copier-template" / "pyproject.toml.jinja",
        lambda line: line.startswith("version = "),
        f'version = "{target_version}"',
    )
    replace_first_line(
        root / "README.md",
        lambda line: line.startswith('  "iti-flask @ git+https://git.noahlan.cn/iti-framework/iTi-Flask.git@v'),
        f'  "iti-flask @ git+https://git.noahlan.cn/iti-framework/iTi-Flask.git@v{target_version}",',
    )
    replace_first_line(
        root / "README.md",
        lambda line: line.startswith("iticli release v"),
        f"iticli release v{target_version}",
        count=2,
    )


def write_system_release_files(root: Path, target_version: str) -> None:
    replace_first_line(
        root / "iti_system" / "__about__.py",
        lambda line: line.startswith("__version__ = "),
        f'__version__ = "{target_version}"',
    )
    replace_first_line(
        root / "pyproject.toml",
        lambda line: line.startswith('iti-flask = { git = "https://git.noahlan.cn/iti-framework/iTi-Flask.git", tag = "'),
        f'iti-flask = {{ git = "https://git.noahlan.cn/iti-framework/iTi-Flask.git", tag = "v{target_version}" }}',
    )
    replace_first_line(
        root / "README.md",
        lambda line: line.startswith('  "iti-flask @ git+https://git.noahlan.cn/iti-framework/iTi-Flask.git@v'),
        f'  "iti-flask @ git+https://git.noahlan.cn/iti-framework/iTi-Flask.git@v{target_version}",',
    )
    replace_first_line(
        root / "README.md",
        lambda line: line.startswith('  "iti-system @ git+https://git.noahlan.cn/iti-framework/iTi-System.git@v'),
        f'  "iti-system @ git+https://git.noahlan.cn/iti-framework/iTi-System.git@v{target_version}",',
    )
    replace_first_line(
        root / "README.md",
        lambda line: line.startswith("iticli release v"),
        f"iticli release v{target_version}",
        count=2,
    )


def replace_first_line(path: Path, predicate: Any, new_line: str, count: int = 1) -> None:
    lines = path.read_text(encoding="utf-8").splitlines()
    updated = 0
    for index, line in enumerate(lines):
        if predicate(line):
            lines[index] = new_line
            updated += 1
            if updated == count:
                path.write_text("\n".join(lines) + "\n", encoding="utf-8")
                return
    raise CliError(f"line not updated in {path}")


def replace_section_default(path: Path, section_header: str, new_line: str) -> None:
    lines = path.read_text(encoding="utf-8").splitlines()
    in_section = False
    for index, line in enumerate(lines):
        if line == section_header:
            in_section = True
            continue
        if in_section and line and not line.startswith((" ", "\t")):
            break
        if in_section and line.startswith("  default: v"):
            lines[index] = new_line
            path.write_text("\n".join(lines) + "\n", encoding="utf-8")
            return
    raise CliError(f"line not updated in {path}")


def normalize_version(raw: str) -> str:
    major, minor, patch = parse_version(raw)
    return f"{major}.{minor}.{patch}"


def bump_patch(raw: str) -> str:
    major, minor, patch = parse_version(raw)
    return f"{major}.{minor}.{patch + 1}"


def version_is_newer(current: str, target: str) -> bool:
    return parse_version(target) > parse_version(current)


def parse_version(raw: str) -> tuple[int, int, int]:
    version = raw.removeprefix("v")
    parts = version.split(".")
    if len(parts) != 3:
        raise CliError(f"invalid version: {raw}")
    try:
        return tuple(int(part) for part in parts)  # type: ignore[return-value]
    except ValueError as exc:
        raise CliError(f"invalid version: {raw}") from exc


if __name__ == "__main__":
    raise SystemExit(main())