-- Versioned tab payloads + immutable submit snapshots + workflow/taxonomy + artifact registry.
-- Apply on existing DBs: psql "$INITIATIVE_DATABASE_URL" -f migrations/002_application_storage_extensions.sql
-- (use sync driver URL, not asyncpg, for psql)

-- =========  DRAFT TAB SNAPSHOTS (fe0: report | application | contribution)  =========
CREATE TABLE IF NOT EXISTS draft_tab_snapshots (
  id              UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  initiative_id   UUID NOT NULL REFERENCES initiatives(id) ON DELETE CASCADE,
  draft_id        UUID REFERENCES drafts(id) ON DELETE SET NULL,
  tab             TEXT NOT NULL CHECK (tab IN ('report', 'application', 'contribution')),
  tab_version     INTEGER NOT NULL DEFAULT 1,
  payload         JSONB NOT NULL DEFAULT '{}'::jsonb,
  source          TEXT NOT NULL DEFAULT 'autosave',
  captured_at     TIMESTAMPTZ NOT NULL DEFAULT now()
);
CREATE INDEX IF NOT EXISTS idx_draft_tab_snapshots_init_tab_ver
  ON draft_tab_snapshots (initiative_id, tab, tab_version DESC);
CREATE INDEX IF NOT EXISTS idx_draft_tab_snapshots_captured
  ON draft_tab_snapshots (captured_at DESC);

-- =========  SUBMIT SNAPSHOTS (immutable row per successful submit)  =========
CREATE TABLE IF NOT EXISTS application_submit_snapshots (
  id                    UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  initiative_id         UUID NOT NULL REFERENCES initiatives(id) ON DELETE CASCADE,
  submission_record_id  TEXT NOT NULL,
  merged_tabs           JSONB NOT NULL DEFAULT '{}'::jsonb,
  submit_metadata       JSONB NOT NULL DEFAULT '{}'::jsonb,
  full_pdf_uri          TEXT NOT NULL,
  captured_at           TIMESTAMPTZ NOT NULL DEFAULT now()
);
CREATE INDEX IF NOT EXISTS idx_submit_snapshots_init_time
  ON application_submit_snapshots (initiative_id, captured_at DESC);

-- =========  WORKFLOW / LIST PROJECTION (council fields)  =========
CREATE TABLE IF NOT EXISTS application_workflow (
  initiative_id    UUID PRIMARY KEY REFERENCES initiatives(id) ON DELETE CASCADE,
  review_status    TEXT NOT NULL DEFAULT 'not_reviewed',
  review_deadline  DATE,
  reviewer         JSONB,
  supervisor       JSONB,
  conference       JSONB,
  updated_at       TIMESTAMPTZ NOT NULL DEFAULT now()
);

-- =========  TAXONOMY (subjectId, groupId, topicType from fe0 ApplicationItem)  =========
CREATE TABLE IF NOT EXISTS application_taxonomy (
  initiative_id UUID PRIMARY KEY REFERENCES initiatives(id) ON DELETE CASCADE,
  subject_id    TEXT NOT NULL DEFAULT '',
  group_id      TEXT NOT NULL DEFAULT '',
  topic_type    TEXT NOT NULL DEFAULT '',
  updated_at    TIMESTAMPTZ NOT NULL DEFAULT now()
);

-- =========  ARTIFACTS (PDF + future abstract/poster URIs; complements evidence_files)  =========
CREATE TABLE IF NOT EXISTS application_artifacts (
  id             UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  initiative_id  UUID NOT NULL REFERENCES initiatives(id) ON DELETE CASCADE,
  role           TEXT NOT NULL CHECK (role IN (
    'full_pdf', 'abstract', 'poster',
    'textbook_evidence', 'research_evidence', 'technical_evidence', 'other'
  )),
  storage_uri    TEXT NOT NULL,
  original_name  TEXT,
  mime_type      TEXT NOT NULL DEFAULT 'application/pdf',
  byte_size      BIGINT,
  sha256         CHAR(64),
  uploaded_by    UUID REFERENCES users(id),
  uploaded_at    TIMESTAMPTZ NOT NULL DEFAULT now(),
  UNIQUE (initiative_id, role)
);
CREATE INDEX IF NOT EXISTS idx_application_artifacts_init ON application_artifacts (initiative_id);