"""The theme bundle (goal 41 task 2): the account-settings appearance
picker backed by Spry's built-in themes. The SetThemeAction persists
the choice per user in user_preferences and writes the DEVICE-scope
"ui" slot ({theme, mode}) the client applies as data-theme/data-mode;
login seeds that slot from the stored preferences."""

from harness import *  # noqa: F401,F403


def run(ctx):
    admin = ctx.auth

    def login_frames(username, password):
        """The login action's FULL directive chain (the harness login()
        only keeps the auth slot; the ui seed rides the same chain)."""
        frames = directives("/login")
        content = json.loads(frames[0]["snapshot_frame"]["content"])
        action = content["public"]["login"]
        status, body = http(action.get("method", "POST"), action["uri"],
                            {"username": username, "password": password})
        if status != 200:
            raise SystemExit("login -> HTTP %d: %s" % (status, body[:300]))
        return json.loads(body)

    print("== profile page: the appearance card ==")
    profile = slot_public(admin, "/profile", "profile")
    check(profile.get("set_theme") is not None,
          "profile carries the set_theme action")
    check(profile.get("theme", "") == "" and profile.get("mode") == "auto",
          "no stored preference reads as core theme + auto mode")

    page = http_get_page(admin, "/profile")
    check("Appearance" in page, "profile page shows the Appearance card")
    for label in ("Spry (default)", "Airy", "Dwarf", "Formal", "Glassy",
                  "H2O", "Living Sky", "Modern"):
        check(label in page, "theme choice offered: %s" % label)
    for label in ("Auto (follow system)", "Light", "Dark"):
        check(label in page, "mode choice offered: %s" % label)
    check("remembered for this account" in page,
          "the card hints the choice is remembered")

    print("== the seven theme stylesheets are served ==")
    for slug in ("airy", "dwarf", "formal", "glassy", "h2o",
                 "living-sky", "modern"):
        status, _ = http("GET", "/_statum/resource/spry-theme-%s.css" % slug)
        check(status == 200, "spry-theme-%s.css served (HTTP %d)" % (slug, status))
    status, _ = http("GET", "/_statum/resource/spry.css")
    check(status == 200, "spry.css served (HTTP %d)" % status)

    print("== saving a theme persists + answers the ui slot ==")
    result = act(admin, profile["set_theme"], {"theme": "dwarf", "mode": "dark"})
    check("saved" in (action_notify(result) or ""),
          "set_theme accepts dwarf/dark")

    ui = [d for d in result
          if d["type"] == "set"
          and json.loads(d["snapshot_frame"]["content"])["slot"]["type"] == "ui"]
    check(len(ui) == 1, "the action answers a ui slot")
    ui_public = json.loads(ui[0]["snapshot_frame"]["content"])["public"]
    check(ui_public.get("theme") == "dwarf" and ui_public.get("mode") == "dark",
          "ui slot public data carries {theme, mode}")
    ui_scope = json.loads(ui[0]["snapshot_frame"]["content"])["slot"]
    check(ui_scope.get("scope") == "device",
          "the ui slot is DEVICE scope (cached across sessions)")

    conn = db()
    try:
        rows = conn.execute(
            "select key, value from user_preferences").fetchall()
    finally:
        conn.close()
    check(dict(rows).get("theme") == "dwarf" and dict(rows).get("mode") == "dark",
          "user_preferences stores theme=dwarf mode=dark: %s" % rows)

    print("== the saved choice reflects back on the profile ==")
    profile = slot_public(admin, "/profile", "profile")
    check(profile.get("theme") == "dwarf" and profile.get("mode") == "dark",
          "profile reads the stored choice back")

    print("== invalid values are refused, nothing stored ==")
    result = act(admin, profile["set_theme"], {"theme": "gruvbox", "mode": "auto"})
    check("Unknown theme" in (action_notify(result) or ""),
          "an unknown theme slug is refused with a friendly error")
    result = act(admin, profile["set_theme"], {"theme": "airy", "mode": "sepia"})
    check("Unknown colour mode" in (action_notify(result) or ""),
          "an unknown colour mode is refused")

    conn = db()
    try:
        rows = conn.execute(
            "select key, value from user_preferences").fetchall()
    finally:
        conn.close()
    check(dict(rows).get("theme") == "dwarf",
          "the refused slugs wrote nothing: %s" % rows)

    print("== core default + upsert overwrite ==")
    result = act(admin, profile["set_theme"], {"theme": "", "mode": "light"})
    check("saved" in (action_notify(result) or ""), "core default + light accepted")
    conn = db()
    try:
        rows = dict(conn.execute(
            "select key, value from user_preferences").fetchall())
    finally:
        conn.close()
    check(rows.get("theme") == "" and rows.get("mode") == "light",
          "the upsert replaced both rows in place: %s" % rows)

    profile = slot_public(admin, "/profile", "profile")
    check(profile.get("theme") == "" and profile.get("mode") == "light",
          "profile reads the core default back")

    print("== login seeds the ui slot from stored prefs ==")
    # The seed rides the LOGIN response's directive chain (the same
    # builder Spry's login action returns, extended by our subclass) -
    # so assert it there, not on a later entrypoint.
    frames = login_frames("admin", "adminpass123")
    seeded = [d for d in frames
              if d["type"] == "set"
              and json.loads(d["snapshot_frame"]["content"])["slot"]["type"] == "ui"]
    check(len(seeded) == 1, "the login response answers a ui slot")
    seeded_public = json.loads(seeded[0]["snapshot_frame"]["content"])["public"]
    check(seeded_public.get("theme") == "" and seeded_public.get("mode") == "light",
          "login seeds the ui slot from the stored preferences")