CREATE TABLE IF NOT EXISTS schoolhouse_course (
  id BIGSERIAL PRIMARY KEY,
  d2l_course_id TEXT NOT NULL UNIQUE,
  name TEXT NOT NULL,
  code TEXT,
  semester TEXT,
  instructor_name TEXT,
  active BOOLEAN NOT NULL DEFAULT TRUE,
  first_seen_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  last_synced_at TIMESTAMPTZ
);

CREATE TABLE IF NOT EXISTS schoolhouse_assignment (
  id BIGSERIAL PRIMARY KEY,
  course_id BIGINT NOT NULL REFERENCES schoolhouse_course(id) ON DELETE CASCADE,
  d2l_assignment_key TEXT,
  title TEXT NOT NULL,
  category TEXT,
  due_at TIMESTAMPTZ,
  status TEXT NOT NULL DEFAULT 'assigned',
  grade_text TEXT,
  grade_numeric DOUBLE PRECISION,
  professor_comments TEXT,
  source TEXT NOT NULL DEFAULT 'd2l',
  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE TABLE IF NOT EXISTS schoolhouse_submission (
  id BIGSERIAL PRIMARY KEY,
  assignment_id BIGINT NOT NULL REFERENCES schoolhouse_assignment(id) ON DELETE CASCADE,
  version_label TEXT NOT NULL DEFAULT 'v1',
  original_filename TEXT NOT NULL,
  mime_type TEXT NOT NULL,
  checksum_sha256 TEXT,
  submitted_at TIMESTAMPTZ,
  suggested_metadata_json JSONB NOT NULL DEFAULT '{}'::jsonb,
  confirmed_metadata_json JSONB NOT NULL DEFAULT '{}'::jsonb,
  paperless_document_id BIGINT,
  paperless_title TEXT,
  paperless_note_last_hash TEXT,
  paperless_note_appended_at TIMESTAMPTZ,
  status TEXT NOT NULL DEFAULT 'draft',
  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE TABLE IF NOT EXISTS schoolhouse_recording (
  id BIGSERIAL PRIMARY KEY,
  course_id BIGINT NOT NULL REFERENCES schoolhouse_course(id) ON DELETE CASCADE,
  assignment_id BIGINT REFERENCES schoolhouse_assignment(id) ON DELETE SET NULL,
  session_date DATE NOT NULL,
  original_filename TEXT NOT NULL,
  mp3_filename TEXT,
  duration_seconds INTEGER,
  transcription_status TEXT NOT NULL DEFAULT 'queued',
  summary_status TEXT NOT NULL DEFAULT 'queued',
  transcript_paperless_document_id BIGINT,
  summary_paperless_document_id BIGINT,
  recording_paperless_document_id BIGINT,
  notes TEXT,
  recording_metadata_json JSONB NOT NULL DEFAULT '{}'::jsonb,
  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE TABLE IF NOT EXISTS schoolhouse_d2l_sync_run (
  id BIGSERIAL PRIMARY KEY,
  started_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  completed_at TIMESTAMPTZ,
  status TEXT NOT NULL DEFAULT 'running',
  raw_snapshot_path TEXT,
  changes_summary_json JSONB NOT NULL DEFAULT '{}'::jsonb,
  error_text TEXT
);

CREATE TABLE IF NOT EXISTS schoolhouse_assignment_mapping (
  id BIGSERIAL PRIMARY KEY,
  course_id BIGINT NOT NULL REFERENCES schoolhouse_course(id) ON DELETE CASCADE,
  d2l_grade_item_name TEXT NOT NULL,
  normalized_key TEXT NOT NULL,
  assignment_id BIGINT NOT NULL REFERENCES schoolhouse_assignment(id) ON DELETE CASCADE,
  confidence DOUBLE PRECISION,
  mapping_source TEXT NOT NULL DEFAULT 'auto',
  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  UNIQUE (course_id, d2l_grade_item_name)
);

CREATE INDEX IF NOT EXISTS idx_schoolhouse_assignment_course_id ON schoolhouse_assignment(course_id);
CREATE INDEX IF NOT EXISTS idx_schoolhouse_submission_assignment_id ON schoolhouse_submission(assignment_id);
CREATE INDEX IF NOT EXISTS idx_schoolhouse_recording_course_id ON schoolhouse_recording(course_id);
CREATE INDEX IF NOT EXISTS idx_schoolhouse_recording_assignment_id ON schoolhouse_recording(assignment_id);