"""Happy-path workflow tests for each Ready tool page.

These drive the GUI like a user would: pre-stash an upload + a passed
gate, render the page, click the primary action, assert the result
landed in session state. They catch wiring bugs that smoke tests
can't see — e.g., a primary button mis-keyed, a result not stashed in
session state, a page reading the wrong key.

Slow-ish (~0.5–2s per workflow). Sits behind the ``gui`` marker so
``pytest -m 'not gui'`` skips them.
"""

from __future__ import annotations

import pandas as pd
import pytest

from .conftest import collected_text, stash_upload


# ---------------------------------------------------------------------------
# Find Duplicates
# ---------------------------------------------------------------------------

class TestDeduplicatorWorkflow:
    """Upload → click Find Duplicates → result lands in session_state."""

    def _setup(self, app_factory, small_csv_bytes):
        app = app_factory("1_Deduplicator")
        stash_upload(app, name="messy.csv", data=small_csv_bytes)
        return app

    def test_upload_renders_preview(self, app_factory, small_csv_bytes):
        app = self._setup(app_factory, small_csv_bytes)
        app.run()
        text = collected_text(app)
        assert "Preview: messy.csv" in text, (
            f"upload preview header missing; got:\n{text[:500]}"
        )

    def test_find_duplicates_button_present(self, app_factory, small_csv_bytes):
        app = self._setup(app_factory, small_csv_bytes)
        app.run()
        labels = [b.label for b in app.button]
        assert any("Find Duplicates" in lbl for lbl in labels), (
            f"primary action missing; got: {labels}"
        )

    def test_clicking_find_duplicates_stashes_result(
        self, app_factory, small_csv_bytes,
    ):
        app = self._setup(app_factory, small_csv_bytes)
        app.run()
        # Find the Find-Duplicates button and click it. AppTest's
        # button-by-key access is via ``.button(key=...)`` — we don't
        # have the key here, so locate it by label.
        target = next(b for b in app.button if "Find Duplicates" in b.label)
        target.click().run()
        # The page stores the result under ``result`` in session state.
        result = app.session_state["result"]
        assert result is not None, "Find Duplicates didn't stash a result"
        # The sample has Alice twice → one match group.
        assert len(result.match_groups) >= 1


# ---------------------------------------------------------------------------
# Clean Text
# ---------------------------------------------------------------------------

class TestTextCleanerWorkflow:
    def _setup(self, app_factory, small_csv_bytes):
        app = app_factory("2_Text_Cleaner")
        stash_upload(app, name="messy.csv", data=small_csv_bytes)
        return app

    def test_page_renders_with_upload(self, app_factory, small_csv_bytes):
        app = self._setup(app_factory, small_csv_bytes)
        app.run()
        assert not app.exception
        text = collected_text(app)
        assert "Clean Text" in text

    def test_preview_or_clean_button_present(self, app_factory, small_csv_bytes):
        """The text cleaner ships a primary action (label varies by
        version). We just assert at least one primary-looking button
        exists past the upload."""
        app = self._setup(app_factory, small_csv_bytes)
        app.run()
        # Filter out the gate-redirect button (which would only be
        # present if the gate fired, which our setup prevents).
        gate_buttons = {"Go to Review & Normalize", "Ir a Revisar y Normalizar"}
        non_gate = [b for b in app.button if b.label not in gate_buttons]
        assert non_gate, (
            f"no primary buttons rendered; got: {[b.label for b in app.button]}"
        )


# ---------------------------------------------------------------------------
# Standardize Formats
# ---------------------------------------------------------------------------

class TestFormatStandardizerWorkflow:
    def test_page_renders_with_upload(self, app_factory, small_csv_bytes):
        app = app_factory("3_Format_Standardizer")
        stash_upload(app, name="messy.csv", data=small_csv_bytes)
        app.run()
        assert not app.exception
        text = collected_text(app)
        assert "Standardize Formats" in text


# ---------------------------------------------------------------------------
# Fix Missing Values
# ---------------------------------------------------------------------------

class TestMissingValuesWorkflow:
    def test_page_renders_with_upload(self, app_factory, small_csv_bytes):
        app = app_factory("4_Missing_Values")
        stash_upload(app, name="messy.csv", data=small_csv_bytes)
        app.run()
        assert not app.exception
        text = collected_text(app)
        assert "Missing" in text


# ---------------------------------------------------------------------------
# Map Columns
# ---------------------------------------------------------------------------

class TestColumnMapperWorkflow:
    def test_page_renders_with_upload(self, app_factory, small_csv_bytes):
        app = app_factory("5_Column_Mapper")
        stash_upload(app, name="messy.csv", data=small_csv_bytes)
        app.run()
        assert not app.exception
        text = collected_text(app)
        assert "Column" in text


# ---------------------------------------------------------------------------
# Automated Workflows
# ---------------------------------------------------------------------------

class TestPipelineRunnerWorkflow:
    def test_page_renders_with_upload(self, app_factory, small_csv_bytes):
        app = app_factory("9_Pipeline_Runner")
        stash_upload(app, name="messy.csv", data=small_csv_bytes)
        app.run()
        assert not app.exception
        text = collected_text(app)
        assert "Automated Workflows" in text


# ---------------------------------------------------------------------------
# Review page — special: doesn't gate on upload, has its own analyzer flow
# ---------------------------------------------------------------------------

class TestReviewWorkflow:
    """The Review page is the gate-fixer. Without an upload it shows
    its own file uploader so the user can start the flow from this
    page directly. With an upload it runs the analyzer and shows
    findings."""

    def test_no_upload_shows_inline_uploader(self, app_factory):
        app = app_factory("0_Review")
        app.run()
        text = collected_text(app)
        # Page should invite the user to upload, not redirect home.
        assert "Upload" in text or "Choose a file" in text, (
            f"Review page should expose an inline uploader; got:\n{text[:400]}"
        )
        # The 'Back to home' button is gone — the page is self-contained now.
        labels = [b.label for b in app.button]
        assert not any("Back to home" in lbl for lbl in labels), (
            f"Back-to-home button should be removed; got buttons: {labels}"
        )

    def test_with_upload_shows_review_content(
        self, app_factory, small_csv_bytes,
    ):
        app = app_factory("0_Review")
        # Review page only needs the upload bytes, not a pre-passed gate.
        app.session_state["home_uploaded_bytes"] = small_csv_bytes
        app.session_state["home_uploaded_name"] = "messy.csv"
        app.session_state["home_uploaded_size"] = len(small_csv_bytes)
        app.run()
        assert not app.exception
        text = collected_text(app)
        # Page ran the analyzer — either we get findings or the
        # "already clean" success message. Either way confirms the
        # analyzer pipeline ran end-to-end with the stashed bytes.
        clean_msg = "No findings to review" in text
        encoding_section = "File encoding" in text
        assert clean_msg or encoding_section, (
            f"Review page didn't surface analyzer output; got:\n{text[:400]}"
        )


# ---------------------------------------------------------------------------
# Coming-Soon pages still render (just a stub) — pinned so we know if a
# Coming-Soon goes from "stub renders" to "import error".
# ---------------------------------------------------------------------------

@pytest.mark.parametrize("slug,name", [
    ("6_Outlier_Detector", "Unusual Values"),
    ("7_Multi_File_Merger", "Combine Files"),
    ("8_Validator_Reporter", "Quality Check"),
])
class TestComingSoonStubs:
    def test_stub_renders(self, app_factory, slug, name):
        app = app_factory(slug)
        app.run()
        assert not app.exception
        text = collected_text(app)
        assert name in text