"""CLI integration tests.

These tests exercise the CLI surface without spawning a subprocess by
invoking typer's CliRunner directly. They rely on the existing
smaller.m4v + M14_L3_S3.srt media in the repo root for the slow path,
but they're skipped if those files aren't present so the suite stays
green in environments that only check out source.
"""
from __future__ import annotations

from pathlib import Path

import pytest
from typer.testing import CliRunner

from app.cli import app
from app.pipeline.metadata import load_metadata

REPO_ROOT = Path(__file__).resolve().parents[1]
VIDEO = REPO_ROOT / "smaller.m4v"
TRANSCRIPT = REPO_ROOT / "M14_L3_S3.srt"

requires_media = pytest.mark.skipif(
    not (VIDEO.exists() and TRANSCRIPT.exists()),
    reason="sample media (smaller.m4v / M14_L3_S3.srt) not present",
)


def test_cli_help_lists_subcommands():
    runner = CliRunner()
    result = runner.invoke(app, ["--help"])
    assert result.exit_code == 0
    out = result.stdout
    assert "build" in out
    assert "export-metadata" in out
    assert "render-from-metadata" in out


@requires_media
def test_cli_export_then_render_is_idempotent(tmp_path):
    runner = CliRunner()
    meta_path = tmp_path / "study_guide_metadata.json"
    frames_dir = tmp_path / "frames"

    result = runner.invoke(
        app,
        [
            "export-metadata",
            str(VIDEO),
            str(TRANSCRIPT),
            "--title", "M14 L3 S3",
            "--subtitle", "Prompting",
            "--module", "Module 14",
            "--output", str(meta_path),
            "--frames-dir", str(frames_dir),
        ],
    )
    assert result.exit_code == 0, result.stdout + (result.stderr or "")
    assert meta_path.exists()

    page = load_metadata(meta_path)
    assert page.title == "M14 L3 S3"
    assert page.subtitle == "Prompting"
    assert page.module == "Module 14"
    assert len(page.segments) > 0
    assert page.segments[0].image_filename.startswith("scene_")

    # Now re-render twice and confirm bytes are identical.
    out1 = tmp_path / "out1.html"
    out2 = tmp_path / "out2.html"
    for out in (out1, out2):
        result = runner.invoke(
            app,
            [
                "render-from-metadata",
                str(meta_path),
                "--output", str(out),
                "--frames-dir", str(frames_dir),
                "--format", "single",
            ],
        )
        assert result.exit_code == 0, result.stdout + (result.stderr or "")
        assert out.exists()
    assert out1.read_bytes() == out2.read_bytes()


@requires_media
def test_cli_skip_ocr_and_max_frames(tmp_path):
    runner = CliRunner()
    meta = tmp_path / "meta.json"
    frames_dir = tmp_path / "frames"
    out = tmp_path / "out.html"

    result = runner.invoke(
        app,
        [
            "build",
            str(VIDEO),
            str(TRANSCRIPT),
            "--title", "Skip OCR",
            "--output", str(out),
            "--frames-dir", str(frames_dir),
            "--export-metadata", str(meta),
            "--skip-ocr",
            "--max-frames", "2",
            "--format", "single",
        ],
    )
    assert result.exit_code == 0, result.stdout + (result.stderr or "")
    page = load_metadata(meta)
    assert len(page.segments) <= 2
    # All segments should have empty OCR because of --skip-ocr.
    assert all(seg.ocr_text == "" for seg in page.segments)


@requires_media
def test_cli_build_single_inlines_audio_data_uris(tmp_path):
    """`build --format single` must inline audio as data URIs so the
    self-contained HTML doesn't reference a missing static/ folder."""
    runner = CliRunner()
    out = tmp_path / "single.html"
    frames_dir = tmp_path / "static"
    result = runner.invoke(
        app,
        [
            "build",
            str(VIDEO),
            str(TRANSCRIPT),
            "--title", "Audio Inline",
            "--output", str(out),
            "--frames-dir", str(frames_dir),
            "--format", "single",
            "--max-frames", "2",
        ],
    )
    assert result.exit_code == 0, result.stdout + (result.stderr or "")
    html = out.read_text(encoding="utf-8")
    if "<audio" in html:
        # If ffmpeg sliced anything, every <audio> src must be inlined —
        # never a relative 'static/foo.mp3' or 'audio/foo.mp3'.
        assert "data:audio/mpeg;base64," in html
        assert 'src="audio/' not in html
        assert 'src="static/segment_' not in html


@requires_media
def test_cli_build_zip_consolidates_assets_under_static(tmp_path):
    """`build --format zip` puts both frames and audio in a single
    static/ folder so the bundle has a clean two-entry layout."""
    import zipfile
    runner = CliRunner()
    out = tmp_path / "guide.zip"
    frames_dir = tmp_path / "static"
    result = runner.invoke(
        app,
        [
            "build",
            str(VIDEO),
            str(TRANSCRIPT),
            "--title", "Audio Zip",
            "--output", str(out),
            "--frames-dir", str(frames_dir),
            "--format", "zip",
            "--max-frames", "2",
        ],
    )
    assert result.exit_code == 0, result.stdout + (result.stderr or "")
    with zipfile.ZipFile(out, "r") as zf:
        names = zf.namelist()
    # No legacy audio/ folder anywhere in the zip.
    assert not any(n.startswith("audio/") for n in names), (
        f"unexpected audio/ entries: {[n for n in names if n.startswith('audio/')]}"
    )
    # Top-level entries are only the html and the static folder.
    top_level = {n.split("/", 1)[0] for n in names}
    assert top_level <= {"static"} | {n for n in names if n.endswith(".html")}, (
        f"unexpected top-level entries: {top_level}"
    )
    # Frames are present; audio is present iff the html references it.
    assert any(n.startswith("static/scene_") and n.endswith(".jpg") for n in names)
    html_name = next((n for n in names if n.endswith(".html")), None)
    assert html_name is not None
    with zipfile.ZipFile(out, "r") as zf:
        html = zf.read(html_name).decode("utf-8")
    if "<audio" in html:
        assert any(n.startswith("static/segment_") and n.endswith(".mp3") for n in names), (
            "HTML references audio but no static/segment_*.mp3 in the zip"
        )


@requires_media
def test_cli_build_writes_html_and_metadata(tmp_path):
    runner = CliRunner()
    out = tmp_path / "guide.html"
    meta = tmp_path / "meta.json"
    frames_dir = tmp_path / "frames"

    result = runner.invoke(
        app,
        [
            "build",
            str(VIDEO),
            str(TRANSCRIPT),
            "--title", "Build Test",
            "--output", str(out),
            "--frames-dir", str(frames_dir),
            "--format", "single",
            "--export-metadata", str(meta),
        ],
    )
    assert result.exit_code == 0, result.stdout + (result.stderr or "")
    assert out.exists()
    assert meta.exists()
    assert "<title>Build Test</title>" in out.read_text(encoding="utf-8")