-- Mehrere Spieler können sich einen CC teilen.

CREATE TABLE IF NOT EXISTS "CharacterMember" (
    "id" SERIAL NOT NULL,
    "characterId" INTEGER NOT NULL,
    "playerId" INTEGER NOT NULL,
    "joinedAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "leftAt" TIMESTAMP(3),
    "paidWith" "CreditKind",
    "note" TEXT,
    "createdById" INTEGER,
    CONSTRAINT "CharacterMember_pkey" PRIMARY KEY ("id")
);

CREATE UNIQUE INDEX IF NOT EXISTS "CharacterMember_characterId_playerId_key"
  ON "CharacterMember"("characterId", "playerId");
CREATE INDEX IF NOT EXISTS "CharacterMember_playerId_idx" ON "CharacterMember"("playerId");
CREATE INDEX IF NOT EXISTS "CharacterMember_characterId_idx" ON "CharacterMember"("characterId");

DO $$ BEGIN
  ALTER TABLE "CharacterMember" ADD CONSTRAINT "CharacterMember_characterId_fkey"
    FOREIGN KEY ("characterId") REFERENCES "Character"("id") ON DELETE CASCADE ON UPDATE CASCADE;
EXCEPTION WHEN duplicate_object THEN NULL; END $$;

DO $$ BEGIN
  ALTER TABLE "CharacterMember" ADD CONSTRAINT "CharacterMember_playerId_fkey"
    FOREIGN KEY ("playerId") REFERENCES "Player"("id") ON DELETE CASCADE ON UPDATE CASCADE;
EXCEPTION WHEN duplicate_object THEN NULL; END $$;

-- Bestehende CCs bekommen ihren Ersteller als erstes Mitglied. Ohne das
-- taucht nach dem Update kein CC mehr beim Spieler auf, da die Zugehörigkeit
-- ab jetzt über diese Tabelle läuft.
INSERT INTO "CharacterMember" ("characterId", "playerId", "joinedAt", "createdById")
SELECT c."id", c."playerId", c."createdAt", c."createdById"
FROM "Character" c
WHERE NOT EXISTS (
  SELECT 1 FROM "CharacterMember" m
  WHERE m."characterId" = c."id" AND m."playerId" = c."playerId"
);