--
-- Should be run from a fresh postgres install on the postgres root user
--

\c postgres

DROP DATABASE IF EXISTS "cordis";
DROP USER IF EXISTS "cordis";

CREATE USER "cordis" WITH PASSWORD 'cordis_pass'; 
CREATE DATABASE "cordis" WITH ENCODING 'UTF8' OWNER 'cordis';

\c cordis

CREATE EXTENSION IF NOT EXISTS "uuid-ossp"; -- for uuid_generate_v4()
CREATE EXTENSION IF NOT EXISTS "pgcrypto"; -- for digest(data, 'sha256')

--
-- corDis Schema
--

-- NOTE: members will be for specific servers and NOT global to the server

CREATE TABLE "servers" (
    "id" UUID NOT NULL DEFAULT uuid_generate_v4()
    , PRIMARY KEY ("id")
);
ALTER TABLE "servers" OWNER TO "cordis";

CREATE TABLE "resources" (
    "id" UUID NOT NULL DEFAULT uuid_generate_v4()
    , "server_id" UUID NOT NULL REFERENCES "servers"("id")
    , "hash" BYTEA NOT NULL
    , "data" BYTEA NOT NULL
    , PRIMARY KEY ("id")
    , UNIQUE ("server_id", "hash")
);
ALTER TABLE "resources" OWNER TO "cordis";

CREATE TABLE "servers_meta" (
    "id" UUID NOT NULL REFERENCES "servers"("id")
    , "name" VARCHAR(64) NOT NULL
    , "icon_resource_id" UUID NOT NULL REFERENCES "resources"("id")
    , PRIMARY KEY ("id")
);
ALTER TABLE "servers_meta" OWNER TO "cordis";

CREATE TYPE "member_status_t" AS ENUM (
    'offline',
    'online',
    'away',
    'busy',
    'invisible'
);
CREATE TABLE "members" (
    "id" UUID NOT NULL DEFAULT uuid_generate_v4()
    , "server_id" UUID NOT NULL REFERENCES "servers"("id")
    , "public_key" BYTEA NOT NULL
    , "display_name" VARCHAR(64) NOT NULL
    , "status" member_status_t DEFAULT 'offline'
    , "avatar_resource_id" UUID NOT NULL REFERENCES "resources"("id")
    , PRIMARY KEY ("id")
    , UNIQUE ("public_key")
);
ALTER TABLE "members" OWNER TO "cordis";

CREATE OR REPLACE FUNCTION "get_public_status"("status" member_status_t) RETURNS member_status_t AS $$
DECLARE
BEGIN
    IF "status"='invisible' THEN
        "status":='offline';
    END IF;
    RETURN "status";
END;
$$ LANGUAGE plpgsql;

CREATE TABLE "tokens" (
    "id" UUID NOT NULL DEFAULT uuid_generate_v4()
    , "server_id" UUID NOT NULL REFERENCES "servers"("id")
    , "expires" TIMESTAMP WITH TIME ZONE NOT NULL
    , "token" UUID NOT NULL DEFAULT uuid_generate_v4()
    , "member_id" UUID REFERENCES "members"("id")
    , "created" TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT NOW()
    , PRIMARY KEY ("id")
    , UNIQUE ("server_id", "token")
);
ALTER TABLE "tokens" OWNER TO "cordis";

CREATE TABLE "channels" (
    "id" UUID NOT NULL DEFAULT uuid_generate_v4()
    , "server_id" UUID NOT NULL REFERENCES "servers"("id")
    , "index" INTEGER NOT NULL
    , "name" VARCHAR(64) NOT NULL
    , "flavor_text" VARCHAR(256)
    , PRIMARY KEY ("id")
    , UNIQUE ("server_id", "index")
);
ALTER TABLE "channels" OWNER TO "cordis";

-- TODO: Maybe use varchar for message text to prevent oversized messages?
-- NOTE: this will probably all be handled in node.js code instead (for more configurability).
CREATE TABLE "messages" (
    "id" UUID NOT NULL DEFAULT uuid_generate_v4()
    , "server_id" UUID NOT NULL REFERENCES "servers"("id") ON DELETE CASCADE
    , "channel_id" UUID NOT NULL REFERENCES "channels"("id") ON DELETE CASCADE
    , "member_id" UUID NOT NULL REFERENCES "members"("id") -- probably want set null
    , "sent_dtg" TIMESTAMP WITH TIME ZONE NOT NULL
    , "text" TEXT
    , "resource_id" UUID REFERENCES "resources"("id")
    , "resource_name" VARCHAR(256)
    , "resource_width" INT
    , "resource_height" INT
    , "resource_preview_id" UUID REFERENCES "resources"("id")
    , PRIMARY KEY ("id")
);
ALTER TABLE "messages" OWNER TO "cordis";

CREATE TABLE "roles" (
    "id" UUID NOT NULL DEFAULT uuid_generate_v4()
    , "server_id" UUID NOT NULL REFERENCES "servers"("id")
    , "name" TEXT NOT NULL
    , "color" TEXT NOT NULL
    , "priority" INTEGER NOT NULL DEFAULT 0 -- for figuring out which color
    , PRIMARY KEY ("id")
    , UNIQUE ("server_id", "priority")
);
ALTER TABLE "roles" OWNER TO "cordis";

CREATE TYPE "server_privilege_t" AS ENUM (
    'modify_profile'
    , 'modify_channels'
    , 'modify_members'
);
CREATE TABLE "role_privileges" (
    "role_id" UUID NOT NULL REFERENCES "roles"("id") ON DELETE CASCADE
    , "server_id" UUID NOT NULL REFERENCES "servers"("id")
    , "privilege" server_privilege_t NOT NULL
);
ALTER TABLE "role_privileges" OWNER TO "cordis";

CREATE TABLE "member_roles" (
    "member_id" UUID NOT NULL REFERENCES "members"("id")
    , "role_id" UUID NOT NULL REFERENCES "roles"("id") ON DELETE CASCADE
    , "server_id" UUID NOT NULL REFERENCES "servers"("id")
    , UNIQUE ("member_id", "role_id", "server_id")
);
ALTER TABLE "member_roles" OWNER TO "cordis";

CREATE OR REPLACE VIEW "members_with_roles" AS (
    SELECT
        "members"."id" AS id
        , "servers"."id" AS server_id
        , "members"."display_name" AS display_name
        , get_public_status("members"."status") AS status
        , "members"."avatar_resource_id" AS avatar_resource_id
        , "priority_role"."name" AS role_name
        , "priority_role"."color" AS role_color
        , "priority_role"."priority" AS role_priority
        , STRING_AGG(DISTINCT "role_privileges"."privilege"::text, ',') AS privileges
    FROM
        "members"
        JOIN "servers" ON "members"."server_id"="servers"."id"
        LEFT JOIN "member_roles" ON
            "members"."id"="member_roles"."member_id"
            AND "member_roles"."server_id"="members"."server_id"
        LEFT JOIN "roles" AS priority_role ON
            priority_role."id"="member_roles"."role_id"
            AND priority_role."server_id"="member_roles"."server_id"
        LEFT JOIN "roles" AS all_roles ON
            all_roles."id"="member_roles"."role_id"
            AND all_roles."server_id"="member_roles"."server_id"
        LEFT JOIN "role_privileges" ON
            "role_privileges"."role_id"=all_roles."id"
            AND "role_privileges"."server_id"=all_roles."server_id"
    WHERE
        priority_role."priority" IS NULL
        OR priority_role."priority"=(
            SELECT MAX("roles"."priority")
            FROM "roles", "member_roles"
            WHERE
                "roles"."id"="member_roles"."role_id"
                AND "roles"."server_id"="member_roles"."server_id"
                AND "member_roles"."member_id"="members"."id"
        )
    GROUP BY
        "members"."id"
        , "servers"."id"
        , "priority_role"."id"
);
ALTER VIEW "members_with_roles" OWNER TO "cordis";