-- Auto-generated by pql init. CREATE TABLE statements
-- for the planning schema; per-table dir keeps the changelog
-- self-describing per D-15. CREATE TABLE IF NOT EXISTS is
-- idempotent so running schema files from each directory in
-- replay order is harmless.
--
-- Importer parses the markers below to detect schema drift
-- between the producing pql version and the local one — a
-- bumped canonical_version means projection rules changed
-- and replay must refuse rather than silently corrupt state.
-- pql:created_by: 1.4.26
-- pql:canonical_version: 1


CREATE TABLE IF NOT EXISTS decisions (
    id                TEXT PRIMARY KEY,
    type              TEXT NOT NULL CHECK(type IN ('confirmed','question','rejected')),
    domain            TEXT NOT NULL,
    title             TEXT NOT NULL,
    status            TEXT NOT NULL DEFAULT 'active'
                          CHECK(status IN ('active','superseded','resolved','open')),
    date              TEXT,
    file_path         TEXT NOT NULL,
    synced_at         TEXT NOT NULL DEFAULT (datetime('now')),
    created_at        TEXT NOT NULL DEFAULT (datetime('now')),
    updated_at        TEXT NOT NULL DEFAULT (datetime('now')),
    deleted_at        TEXT,
    hash              TEXT,
    canonical_version INTEGER
);

CREATE TABLE IF NOT EXISTS decision_refs (
    source_id         TEXT NOT NULL REFERENCES decisions(id) ON DELETE CASCADE,
    target_id         TEXT NOT NULL REFERENCES decisions(id) ON DELETE CASCADE,
    ref_type          TEXT NOT NULL
                          CHECK(ref_type IN ('supersedes','references','resolves','depends_on','amends')),
    note              TEXT,
    created_at        TEXT NOT NULL DEFAULT (datetime('now')),
    updated_at        TEXT NOT NULL DEFAULT (datetime('now')),
    deleted_at        TEXT,
    hash              TEXT,
    canonical_version INTEGER,
    PRIMARY KEY (source_id, target_id, ref_type)
);

CREATE TABLE IF NOT EXISTS tickets (
    id                TEXT PRIMARY KEY,
    type              TEXT NOT NULL CHECK(type IN ('initiative','epic','story','task','bug')),
    parent_id         TEXT REFERENCES tickets(id),
    title             TEXT NOT NULL,
    description       TEXT,
    status            TEXT NOT NULL DEFAULT 'backlog'
                          CHECK(status IN ('backlog','ready','in_progress','review','done','cancelled')),
    priority          TEXT DEFAULT 'medium'
                          CHECK(priority IN ('critical','high','medium','low')),
    assigned_to       TEXT,
    team              TEXT,
    decision_ref      TEXT REFERENCES decisions(id),
    created_at        TEXT NOT NULL DEFAULT (datetime('now')),
    updated_at        TEXT NOT NULL DEFAULT (datetime('now')),
    deleted_at        TEXT,
    hash              TEXT,
    canonical_version INTEGER
);

CREATE TABLE IF NOT EXISTS ticket_deps (
    blocker_id        TEXT NOT NULL REFERENCES tickets(id),
    blocked_id        TEXT NOT NULL REFERENCES tickets(id),
    created_at        TEXT NOT NULL DEFAULT (datetime('now')),
    updated_at        TEXT NOT NULL DEFAULT (datetime('now')),
    deleted_at        TEXT,
    hash              TEXT,
    canonical_version INTEGER,
    PRIMARY KEY (blocker_id, blocked_id)
);

CREATE TABLE IF NOT EXISTS ticket_history (
    ticket_id         TEXT NOT NULL REFERENCES tickets(id),
    field             TEXT NOT NULL,
    old_value         TEXT,
    new_value         TEXT,
    changed_by        TEXT,
    changed_at        TEXT NOT NULL DEFAULT (datetime('now')),
    created_at        TEXT NOT NULL DEFAULT (datetime('now')),
    updated_at        TEXT NOT NULL DEFAULT (datetime('now')),
    deleted_at        TEXT,
    hash              TEXT UNIQUE,
    canonical_version INTEGER
);

CREATE TABLE IF NOT EXISTS ticket_labels (
    ticket_id         TEXT NOT NULL REFERENCES tickets(id),
    label             TEXT NOT NULL,
    created_at        TEXT NOT NULL DEFAULT (datetime('now')),
    updated_at        TEXT NOT NULL DEFAULT (datetime('now')),
    deleted_at        TEXT,
    hash              TEXT,
    canonical_version INTEGER,
    PRIMARY KEY (ticket_id, label)
);

CREATE TABLE IF NOT EXISTS meta (
    key        TEXT PRIMARY KEY,
    value      TEXT NOT NULL,
    updated_at TEXT NOT NULL DEFAULT (datetime('now'))
);

CREATE INDEX IF NOT EXISTS idx_tickets_status        ON tickets(status);
CREATE INDEX IF NOT EXISTS idx_tickets_team          ON tickets(team);
CREATE INDEX IF NOT EXISTS idx_tickets_decision_ref  ON tickets(decision_ref);
CREATE INDEX IF NOT EXISTS idx_tickets_assigned      ON tickets(assigned_to);
CREATE INDEX IF NOT EXISTS idx_decisions_domain      ON decisions(domain);
CREATE INDEX IF NOT EXISTS idx_decisions_type        ON decisions(type);
CREATE INDEX IF NOT EXISTS idx_decision_refs_target  ON decision_refs(target_id);