-- =========================================================
-- Pitch Deck: Version Management (Git-Style History)
-- =========================================================

-- Version metadata: each version points to its parent (git-style DAG)
CREATE TABLE IF NOT EXISTS pitch_versions (
  id            UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  name          TEXT NOT NULL,
  description   TEXT,
  parent_id     UUID REFERENCES pitch_versions(id) ON DELETE SET NULL,
  status        VARCHAR(20) NOT NULL DEFAULT 'draft'
                CHECK (status IN ('draft', 'committed')),
  created_by    UUID REFERENCES pitch_admins(id) ON DELETE SET NULL,
  committed_at  TIMESTAMPTZ,
  created_at    TIMESTAMPTZ NOT NULL DEFAULT NOW()
);
CREATE INDEX IF NOT EXISTS idx_pitch_versions_parent ON pitch_versions(parent_id);
CREATE INDEX IF NOT EXISTS idx_pitch_versions_status ON pitch_versions(status);

-- Version content: one row per data table per version (fully materialized)
-- table_name values: company, team, financials, market, competitors, features,
--   milestones, metrics, funding, products, fm_scenarios, fm_assumptions
CREATE TABLE IF NOT EXISTS pitch_version_data (
  id            UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  version_id    UUID NOT NULL REFERENCES pitch_versions(id) ON DELETE CASCADE,
  table_name    TEXT NOT NULL,
  data          JSONB NOT NULL,
  updated_at    TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  updated_by    UUID REFERENCES pitch_admins(id) ON DELETE SET NULL,
  UNIQUE(version_id, table_name)
);
CREATE INDEX IF NOT EXISTS idx_pitch_version_data_version ON pitch_version_data(version_id);

-- Per-investor version assignment (NULL = use base tables)
ALTER TABLE pitch_investors
  ADD COLUMN IF NOT EXISTS assigned_version_id UUID REFERENCES pitch_versions(id) ON DELETE SET NULL;