-- GTD schema. Applied idempotently by migrate step in entrypoint.

create table if not exists projects (
    id          uuid primary key default gen_random_uuid(),
    name        text not null,
    status      text not null default 'active'
                check (status in ('active', 'someday', 'completed', 'dropped')),
    notes       text not null default '',
    sort_order  double precision not null default 0,
    created_at  timestamptz not null default now(),
    updated_at  timestamptz not null default now()
);

create table if not exists tasks (
    id           uuid primary key default gen_random_uuid(),
    title        text not null,
    notes        text not null default '',
    -- The GTD lists. 'scheduled' = calendar/tickler items surfaced by defer_date.
    status       text not null default 'inbox'
                 check (status in ('inbox', 'next', 'waiting', 'scheduled', 'someday', 'done', 'trashed')),
    project_id   uuid references projects(id) on delete set null,
    context      text,           -- '@home', '@computer', '@errands', '@calls', ...
    waiting_for  text,           -- who/what is being waited on when status = 'waiting'
    due_date     date,
    defer_date   date,           -- hide from lists until this date
    priority     int not null default 4 check (priority between 1 and 4),  -- 1=urgent … 4=low
    estimate_min int check (estimate_min > 0),
    repeat       text check (repeat in ('daily', 'weekdays', 'weekly', 'monthly', 'yearly')),
    completed_at timestamptz,
    sort_order   double precision not null default 0,
    created_at   timestamptz not null default now(),
    updated_at   timestamptz not null default now()
);

create index if not exists tasks_status_idx on tasks (status);
create index if not exists tasks_project_idx on tasks (project_id);

-- Columns added after the initial deploy (create-if-not-exists won't alter).
alter table tasks add column if not exists repeat text
    check (repeat in ('daily', 'weekdays', 'weekly', 'monthly', 'yearly'));