-- bigtech.sucks — living database schema
-- The website is a view over this. Nothing in the site may hardcode a number
-- that lives here.
--
-- Design rule: an assessment is an ARTIFACT with a date, a version, a method and
-- evidence. A score without an assessment is a placeholder and is stored as NULL,
-- never as a guess.

PRAGMA foreign_keys = ON;
PRAGMA journal_mode = WAL;

-- ---------------------------------------------------------------- who owns it
CREATE TABLE IF NOT EXISTS vendor (
  id              TEXT PRIMARY KEY,
  name            TEXT NOT NULL,
  legal_entity    TEXT,
  entity_type     TEXT CHECK (entity_type IN ('nonprofit','private','public','state','unknown')),
  jurisdiction    TEXT,            -- ISO 3166-1 alpha-2
  business_model  TEXT CHECK (business_model IN ('advertising','subscription','hardware','license','mixed','none','unknown')),
  parent_id       TEXT REFERENCES vendor(id),
  founded         TEXT,
  notes           TEXT
);

-- ---------------------------------------------------------------- what it is
CREATE TABLE IF NOT EXISTS category (
  id          TEXT PRIMARY KEY,
  label       TEXT NOT NULL,
  sensitivity REAL NOT NULL CHECK (sensitivity BETWEEN 0 AND 1),
  nextcloud   TEXT
);

CREATE TABLE IF NOT EXISTS product (
  id            TEXT PRIMARY KEY,
  vendor_id     TEXT NOT NULL REFERENCES vendor(id),
  name          TEXT NOT NULL,
  category_id   TEXT REFERENCES category(id),
  -- platform is part of the identity: Signal iOS != Signal Desktop
  platform      TEXT NOT NULL,
  source_url    TEXT,
  license       TEXT,
  sovereign     INTEGER NOT NULL DEFAULT 0 CHECK (sovereign IN (0,1)),
  boss          INTEGER NOT NULL DEFAULT 0 CHECK (boss IN (0,1)),
  art_slot      TEXT,
  monthly_cost  REAL,
  notes         TEXT,
  UNIQUE(id, platform)
);

-- ---------------------------------------------------------------- the instrument
CREATE TABLE IF NOT EXISTS dimension (
  id          TEXT PRIMARY KEY,
  label       TEXT NOT NULL,
  weight      REAL NOT NULL CHECK (weight > 0),
  anchor_10   TEXT NOT NULL,
  anchor_0    TEXT NOT NULL
);

CREATE TABLE IF NOT EXISTS assessment (
  id                 TEXT PRIMARY KEY,
  product_id         TEXT NOT NULL REFERENCES product(id),
  version            TEXT NOT NULL,
  source_commit      TEXT,
  assessed_on        TEXT NOT NULL,
  method_version     TEXT NOT NULL,
  -- 0 = none, 1 = available but experimental/unverified, 2 = verified
  reproducible_build INTEGER NOT NULL DEFAULT 0 CHECK (reproducible_build IN (0,1,2)),
  weighted_total     REAL NOT NULL CHECK (weighted_total BETWEEN 0 AND 100),
  grade              TEXT NOT NULL,
  weakest_dimension  TEXT NOT NULL REFERENCES dimension(id),
  headline           TEXT NOT NULL,   -- the caveat, in one sentence
  not_tested         TEXT,
  UNIQUE(product_id, version, assessed_on)
);

CREATE TABLE IF NOT EXISTS score (
  assessment_id TEXT NOT NULL REFERENCES assessment(id) ON DELETE CASCADE,
  dimension_id  TEXT NOT NULL REFERENCES dimension(id),
  value         REAL NOT NULL CHECK (value BETWEEN 0 AND 10),
  rationale     TEXT,
  PRIMARY KEY (assessment_id, dimension_id)
);

-- evidence is the only thing that makes a score legitimate
CREATE TABLE IF NOT EXISTS evidence (
  id            INTEGER PRIMARY KEY AUTOINCREMENT,
  assessment_id TEXT NOT NULL REFERENCES assessment(id) ON DELETE CASCADE,
  dimension_id  TEXT REFERENCES dimension(id),
  claim         TEXT NOT NULL,
  tier          INTEGER NOT NULL CHECK (tier IN (1,2,3,4)),
  kind          TEXT CHECK (kind IN ('source','capture','record','filing','advisory','paper','claim')),
  artifact      TEXT,          -- path inside the vault, or URL
  sha256        TEXT,
  observed_at   TEXT
);

CREATE TABLE IF NOT EXISTS finding (
  id            INTEGER PRIMARY KEY AUTOINCREMENT,
  assessment_id TEXT NOT NULL REFERENCES assessment(id) ON DELETE CASCADE,
  severity      TEXT NOT NULL CHECK (severity IN ('critical','high','medium','low','info')),
  title         TEXT NOT NULL,
  detail        TEXT,
  status        TEXT NOT NULL DEFAULT 'open' CHECK (status IN ('open','fixed','by_design','disputed','accepted')),
  disclosed_on  TEXT,
  cve           TEXT
);

CREATE TABLE IF NOT EXISTS offramp (
  product_id  TEXT NOT NULL REFERENCES product(id),
  replacement TEXT NOT NULL,
  nextcloud   TEXT,
  notes       TEXT,
  PRIMARY KEY (product_id, replacement)
);

-- ---------------------------------------------------------------- derived views
-- The single number the game and the report both use.
CREATE VIEW IF NOT EXISTS v_product_score AS
SELECT
  p.id                AS product_id,
  p.name              AS product,
  p.platform,
  p.category_id,
  v.id                AS vendor_id,
  v.name              AS vendor,
  v.business_model,
  v.jurisdiction,
  a.id                AS assessment_id,
  a.assessed_on,
  a.version,
  a.weighted_total,
  a.grade,
  a.weakest_dimension,
  a.headline,
  -- policy axis: who holds your data, and what can they be made to hand over
  CAST(ROUND(10 * (
      0.40 * (SELECT value FROM score WHERE assessment_id = a.id AND dimension_id = 'server_retention')
    + 0.30 * (SELECT value FROM score WHERE assessment_id = a.id AND dimension_id = 'ownership_jurisdiction')
    + 0.30 * (SELECT value FROM score WHERE assessment_id = a.id AND dimension_id = 'user_control_exit')
  )) AS INTEGER) AS policy,
  -- infra axis: can you verify it, and what does it leave on your disk
  CAST(ROUND(10 * (
      0.50 * (SELECT value FROM score WHERE assessment_id = a.id AND dimension_id = 'verifiability')
    + 0.30 * (SELECT value FROM score WHERE assessment_id = a.id AND dimension_id = 'dependency_surface')
    + 0.20 * (SELECT value FROM score WHERE assessment_id = a.id AND dimension_id = 'local_data_exposure')
  )) AS INTEGER) AS infra
FROM product p
JOIN vendor v ON v.id = p.vendor_id
LEFT JOIN assessment a
  ON a.product_id = p.id
 AND a.assessed_on = (SELECT MAX(assessed_on) FROM assessment WHERE product_id = p.id);

-- A product with no assessment must surface as unassessed, not as a number.
CREATE VIEW IF NOT EXISTS v_coverage AS
SELECT
  p.id AS product_id,
  p.name,
  p.platform,
  CASE WHEN a.id IS NULL THEN 'unassessed' ELSE a.grade END AS status,
  a.weighted_total
FROM product p
LEFT JOIN assessment a ON a.product_id = p.id
 AND a.assessed_on = (SELECT MAX(assessed_on) FROM assessment WHERE product_id = p.id);