#!/usr/bin/env bash
set -euo pipefail

native_source="$1"
main_source="$2"
dev_ui_source="$3"

require_pattern() {
  local pattern="$1"
  local file="$2"
  local message="$3"
  if ! grep -Eq "$pattern" "$file"; then
    echo "$message" >&2
    exit 1
  fi
}

require_pattern \
  'CefRequestContext::CreateContext' \
  "$native_source" \
  "Dictation must use an isolated CEF request context."
require_pattern \
  'view_->is_dictation_transport' \
  "$native_source" \
  "Microphone permission must be scoped to the hidden dictation transport."
require_pattern \
  'http://127\.0\.0\.1:8090' \
  "$native_source" \
  "Microphone permission must be scoped to the loopback dictation origin."
require_pattern \
  'OnShowPermissionPrompt' \
  "$native_source" \
  "The hidden Chrome-style permission prompt must be handled natively."
require_pattern \
  'CEF_PERMISSION_TYPE_MIC_STREAM' \
  "$native_source" \
  "The native prompt handler must identify microphone requests."
require_pattern \
  'CEF_PERMISSION_RESULT_ACCEPT' \
  "$native_source" \
  "The native prompt handler must accept loopback microphone access."
require_pattern \
  'requests_other_media' \
  "$native_source" \
  "The native permission handler must reject non-audio media requests."
require_pattern \
  'callback->Continue\(audio\)' \
  "$native_source" \
  "The native permission handler must grant loopback audio directly."

if grep -Eq 'AppendSwitch\("(enable-media-stream|use-fake-ui-for-media-stream)"' \
    "$native_source"; then
  echo "Global media auto-grant switches are forbidden." >&2
  exit 1
fi

require_pattern \
  'Canvas_App_Ensure_Dictation_Entity' \
  "$main_source" \
  "Dictation must create a retained canvas entity."
require_pattern \
  'CANVAS_ENTITY_TEXT_AREA' \
  "$main_source" \
  "Dictation must use the wrapping text-area entity."
require_pattern \
  'Canvas_Text_Area_Set_Content' \
  "$main_source" \
  "Live transcripts must update the retained text area."
require_pattern \
  '"Dictation"' \
  "$main_source" \
  "The live transcript entity must expose a draggable Dictation header."
submit_source="$(
  sed -n \
    '/static boolean Canvas_App_Submit_Dictation(void)/,/^}/p' \
    "$main_source"
)"
if grep -Eq 'dictation_entity_id = 0' <<<"$submit_source" ||
    ! grep -Eq 'Canvas_App_Sync_Dictation_Entity' <<<"$submit_source"; then
  echo "Submission must clear and reuse the one Dictation scratchpad." >&2
  exit 1
fi
if grep -Eq 'Set_Dictation_Active' <<<"$submit_source"; then
  echo "Sending a thought must keep live microphone capture active." >&2
  exit 1
fi
if grep -Eq 'Canvas_App_Draw_Dictation_Overlay' "$main_source"; then
  echo "Dictation must not also render a screen-space popup." >&2
  exit 1
fi

indicator_source="$(
  sed -n \
    '/static void Canvas_App_Draw_Listening_Indicator(void)/,/^}/p' \
    "$main_source"
)"
for pattern in \
  'if \(!g_app->dictation_listening\) return' \
  'GetScreenHeight\(\) - 28\.0f' \
  'g_app->theme\.danger' \
  'g_app->theme\.text_muted' \
  '"Listening"'; do
  if ! grep -Eq "$pattern" <<<"$indicator_source"; then
    echo "Dictation must show a theme-aware bottom-left listening indicator." >&2
    exit 1
  fi
done

input_source="$(
  sed -n \
    '/static void Canvas_App_Update_Dictation_Overlay_Input(void)/,/^}/p' \
    "$main_source"
)"
if ! grep -Eq 'IsKeyPressed\(KEY_ENTER\)' <<<"$input_source"; then
  echo "Dictation overlay must submit from Enter." >&2
  exit 1
fi
if ! grep -Eq 'Canvas_Web_Surface_Commit_Dictation' <<<"$input_source"; then
  echo "Enter must commit the utterance without stopping the microphone." >&2
  exit 1
fi
if ! grep -Eq 'dictation_listening.*IsKeyPressed\(KEY_BACKSPACE\)' \
    <<<"$input_source"; then
  echo "Backspace must clear active dictation without stopping capture." >&2
  exit 1
fi
entity_source="$(
  sed -n \
    '/static void Canvas_App_Sync_Dictation_Entity(void)/,/^}/p' \
    "$main_source"
)"
if ! grep -Eq "dictation_partial\\[0\\]" <<<"$entity_source" ||
    ! grep -Eq 'TRUE : FALSE' <<<"$entity_source"; then
  echo "In-progress dictation text must use the muted theme color." >&2
  exit 1
fi

require_pattern \
  'EnsureDictationView\(p_surface\);' \
  "$native_source" \
  "Native dictation transport must be prewarmed before the M hotkey."
require_pattern \
  'Canvas_Web_Surface_Set_Dictation_Active' \
  "$main_source" \
  "Dictation must use deterministic start and stop commands."

active_source="$(
  sed -n \
    '/static void Canvas_App_Set_Dictation_Active(boolean active)/,/^}/p' \
    "$main_source"
)"
if grep -Eq "dictation_(partial|transcript)\\[0\\] = '\\\\0'" \
    <<<"$active_source"; then
  echo "Resuming dictation must preserve the existing scratchpad text." >&2
  exit 1
fi

require_pattern \
  'p_ui->collapsed' \
  "$dev_ui_source" \
  "Developer controls must expose a persistent collapsed state."
require_pattern \
  'DEV_PANEL_COLLAPSED' \
  "$dev_ui_source" \
  "Collapsed developer controls must retain a visible restore button."

final_source="$(
  sed -n \
    '/CANVAS_DICTATION_EVENT_FINAL/,/if (!g_app->dictation_overlay_visible/p' \
    "$main_source"
)"
if ! grep -Eq 'dictation_send_pending' <<<"$final_source"; then
  echo "Final dictation must wait for explicit Enter submission." >&2
  exit 1
fi