"""
Pytest tests for timestamp-based branch naming in create-new-feature.sh and common.sh.

Converted from tests/test_timestamp_branches.sh so they are discovered by `uv run pytest`.
"""

import os
import re
import shutil
import subprocess
from pathlib import Path

import pytest

PROJECT_ROOT = Path(__file__).resolve().parent.parent
CREATE_FEATURE = PROJECT_ROOT / "scripts" / "bash" / "create-new-feature.sh"
COMMON_SH = PROJECT_ROOT / "scripts" / "bash" / "common.sh"


@pytest.fixture
def git_repo(tmp_path: Path) -> Path:
    """Create a temp git repo with scripts and .specify dir."""
    subprocess.run(["git", "init", "-q"], cwd=tmp_path, check=True)
    subprocess.run(
        ["git", "config", "user.email", "test@example.com"], cwd=tmp_path, check=True
    )
    subprocess.run(
        ["git", "config", "user.name", "Test User"], cwd=tmp_path, check=True
    )
    subprocess.run(
        ["git", "commit", "--allow-empty", "-m", "init", "-q"],
        cwd=tmp_path,
        check=True,
    )
    scripts_dir = tmp_path / "scripts" / "bash"
    scripts_dir.mkdir(parents=True)
    shutil.copy(CREATE_FEATURE, scripts_dir / "create-new-feature.sh")
    shutil.copy(COMMON_SH, scripts_dir / "common.sh")
    (tmp_path / ".specify" / "templates").mkdir(parents=True)
    return tmp_path


@pytest.fixture
def no_git_dir(tmp_path: Path) -> Path:
    """Create a temp directory without git, but with scripts."""
    scripts_dir = tmp_path / "scripts" / "bash"
    scripts_dir.mkdir(parents=True)
    shutil.copy(CREATE_FEATURE, scripts_dir / "create-new-feature.sh")
    shutil.copy(COMMON_SH, scripts_dir / "common.sh")
    (tmp_path / ".specify" / "templates").mkdir(parents=True)
    return tmp_path


def run_script(cwd: Path, *args: str) -> subprocess.CompletedProcess:
    """Run create-new-feature.sh with given args."""
    cmd = ["bash", "scripts/bash/create-new-feature.sh", *args]
    return subprocess.run(
        cmd,
        cwd=cwd,
        capture_output=True,
        text=True,
    )


def source_and_call(func_call: str, env: dict | None = None) -> subprocess.CompletedProcess:
    """Source common.sh and call a function."""
    cmd = f'source "{COMMON_SH}" && {func_call}'
    return subprocess.run(
        ["bash", "-c", cmd],
        capture_output=True,
        text=True,
        env={**os.environ, **(env or {})},
    )


# ── Timestamp Branch Tests ───────────────────────────────────────────────────


class TestTimestampBranch:
    def test_timestamp_creates_branch(self, git_repo: Path):
        """Test 1: --timestamp creates branch with YYYYMMDD-HHMMSS prefix."""
        result = run_script(git_repo, "--timestamp", "--short-name", "user-auth", "Add user auth")
        assert result.returncode == 0, result.stderr
        branch = None
        for line in result.stdout.splitlines():
            if line.startswith("BRANCH_NAME:"):
                branch = line.split(":", 1)[1].strip()
        assert branch is not None
        assert re.match(r"^\d{8}-\d{6}-user-auth$", branch), f"unexpected branch: {branch}"

    def test_number_and_timestamp_warns(self, git_repo: Path):
        """Test 3: --number + --timestamp warns and uses timestamp."""
        result = run_script(git_repo, "--timestamp", "--number", "42", "--short-name", "feat", "Feature")
        assert result.returncode == 0, result.stderr
        assert "Warning" in result.stderr and "--number" in result.stderr

    def test_json_output_keys(self, git_repo: Path):
        """Test 4: JSON output contains expected keys."""
        import json
        result = run_script(git_repo, "--json", "--timestamp", "--short-name", "api", "API feature")
        assert result.returncode == 0, result.stderr
        data = json.loads(result.stdout)
        for key in ("BRANCH_NAME", "SPEC_FILE", "FEATURE_NUM"):
            assert key in data, f"missing {key} in JSON: {data}"
        assert re.match(r"^\d{8}-\d{6}$", data["FEATURE_NUM"])

    def test_long_name_truncation(self, git_repo: Path):
        """Test 5: Long branch name is truncated to <= 244 chars."""
        long_name = "a-" * 150 + "end"
        result = run_script(git_repo, "--timestamp", "--short-name", long_name, "Long feature")
        assert result.returncode == 0, result.stderr
        branch = None
        for line in result.stdout.splitlines():
            if line.startswith("BRANCH_NAME:"):
                branch = line.split(":", 1)[1].strip()
        assert branch is not None
        assert len(branch) <= 244
        assert re.match(r"^\d{8}-\d{6}-", branch)


# ── Sequential Branch Tests ──────────────────────────────────────────────────


class TestSequentialBranch:
    def test_sequential_default_with_existing_specs(self, git_repo: Path):
        """Test 2: Sequential default with existing specs."""
        (git_repo / "specs" / "001-first-feat").mkdir(parents=True)
        (git_repo / "specs" / "002-second-feat").mkdir(parents=True)
        result = run_script(git_repo, "--short-name", "new-feat", "New feature")
        assert result.returncode == 0, result.stderr
        branch = None
        for line in result.stdout.splitlines():
            if line.startswith("BRANCH_NAME:"):
                branch = line.split(":", 1)[1].strip()
        assert branch is not None
        assert re.match(r"^\d{3}-new-feat$", branch), f"unexpected branch: {branch}"

    def test_sequential_ignores_timestamp_dirs(self, git_repo: Path):
        """Sequential numbering skips timestamp dirs when computing next number."""
        (git_repo / "specs" / "002-first-feat").mkdir(parents=True)
        (git_repo / "specs" / "20260319-143022-ts-feat").mkdir(parents=True)
        result = run_script(git_repo, "--short-name", "next-feat", "Next feature")
        assert result.returncode == 0, result.stderr
        branch = None
        for line in result.stdout.splitlines():
            if line.startswith("BRANCH_NAME:"):
                branch = line.split(":", 1)[1].strip()
        assert branch == "003-next-feat", f"expected 003-next-feat, got: {branch}"


# ── check_feature_branch Tests ───────────────────────────────────────────────


class TestCheckFeatureBranch:
    def test_accepts_timestamp_branch(self):
        """Test 6: check_feature_branch accepts timestamp branch."""
        result = source_and_call('check_feature_branch "20260319-143022-feat" "true"')
        assert result.returncode == 0

    def test_accepts_sequential_branch(self):
        """Test 7: check_feature_branch accepts sequential branch."""
        result = source_and_call('check_feature_branch "004-feat" "true"')
        assert result.returncode == 0

    def test_rejects_main(self):
        """Test 8: check_feature_branch rejects main."""
        result = source_and_call('check_feature_branch "main" "true"')
        assert result.returncode != 0

    def test_rejects_partial_timestamp(self):
        """Test 9: check_feature_branch rejects 7-digit date."""
        result = source_and_call('check_feature_branch "2026031-143022-feat" "true"')
        assert result.returncode != 0


# ── find_feature_dir_by_prefix Tests ─────────────────────────────────────────


class TestFindFeatureDirByPrefix:
    def test_timestamp_branch(self, tmp_path: Path):
        """Test 10: find_feature_dir_by_prefix with timestamp branch."""
        (tmp_path / "specs" / "20260319-143022-user-auth").mkdir(parents=True)
        result = source_and_call(
            f'find_feature_dir_by_prefix "{tmp_path}" "20260319-143022-user-auth"'
        )
        assert result.returncode == 0
        assert result.stdout.strip() == f"{tmp_path}/specs/20260319-143022-user-auth"

    def test_cross_branch_prefix(self, tmp_path: Path):
        """Test 11: find_feature_dir_by_prefix cross-branch (different suffix, same timestamp)."""
        (tmp_path / "specs" / "20260319-143022-original-feat").mkdir(parents=True)
        result = source_and_call(
            f'find_feature_dir_by_prefix "{tmp_path}" "20260319-143022-different-name"'
        )
        assert result.returncode == 0
        assert result.stdout.strip() == f"{tmp_path}/specs/20260319-143022-original-feat"


# ── get_current_branch Tests ─────────────────────────────────────────────────


class TestGetCurrentBranch:
    def test_env_var(self):
        """Test 12: get_current_branch returns SPECIFY_FEATURE env var."""
        result = source_and_call("get_current_branch", env={"SPECIFY_FEATURE": "my-custom-branch"})
        assert result.stdout.strip() == "my-custom-branch"


# ── No-git Tests ─────────────────────────────────────────────────────────────


class TestNoGitTimestamp:
    def test_no_git_timestamp(self, no_git_dir: Path):
        """Test 13: No-git repo + timestamp creates spec dir with warning."""
        result = run_script(no_git_dir, "--timestamp", "--short-name", "no-git-feat", "No git feature")
        assert result.returncode == 0, result.stderr
        spec_dirs = list((no_git_dir / "specs").iterdir()) if (no_git_dir / "specs").exists() else []
        assert len(spec_dirs) > 0, "spec dir not created"
        assert "git" in result.stderr.lower() or "warning" in result.stderr.lower()


# ── E2E Flow Tests ───────────────────────────────────────────────────────────


class TestE2EFlow:
    def test_e2e_timestamp(self, git_repo: Path):
        """Test 14: E2E timestamp flow — branch, dir, validation."""
        run_script(git_repo, "--timestamp", "--short-name", "e2e-ts", "E2E timestamp test")
        branch = subprocess.run(
            ["git", "rev-parse", "--abbrev-ref", "HEAD"],
            cwd=git_repo,
            capture_output=True,
            text=True,
        ).stdout.strip()
        assert re.match(r"^\d{8}-\d{6}-e2e-ts$", branch), f"branch: {branch}"
        assert (git_repo / "specs" / branch).is_dir()
        val = source_and_call(f'check_feature_branch "{branch}" "true"')
        assert val.returncode == 0

    def test_e2e_sequential(self, git_repo: Path):
        """Test 15: E2E sequential flow (regression guard)."""
        run_script(git_repo, "--short-name", "seq-feat", "Sequential feature")
        branch = subprocess.run(
            ["git", "rev-parse", "--abbrev-ref", "HEAD"],
            cwd=git_repo,
            capture_output=True,
            text=True,
        ).stdout.strip()
        assert re.match(r"^\d{3}-seq-feat$", branch), f"branch: {branch}"
        assert (git_repo / "specs" / branch).is_dir()
        val = source_and_call(f'check_feature_branch "{branch}" "true"')
        assert val.returncode == 0