ALTER TABLE pieces ADD COLUMN is_favorite INTEGER NOT NULL DEFAULT 0
	CHECK (is_favorite IN (0, 1));

CREATE TABLE tools (
	id TEXT PRIMARY KEY,
	name TEXT NOT NULL UNIQUE,
	start_url TEXT NOT NULL DEFAULT '',
	description TEXT NOT NULL DEFAULT '',
	is_active INTEGER NOT NULL DEFAULT 1 CHECK (is_active IN (0, 1)),
	created_at_utc TEXT NOT NULL,
	updated_at_utc TEXT NOT NULL
);

CREATE TABLE tool_formats (
	tool_id TEXT NOT NULL REFERENCES tools(id) ON DELETE CASCADE,
	format_id TEXT NOT NULL REFERENCES formats(id) ON DELETE CASCADE,
	PRIMARY KEY (tool_id, format_id)
);

CREATE TABLE piece_tools (
	id TEXT PRIMARY KEY,
	piece_id TEXT NOT NULL REFERENCES pieces(id) ON DELETE CASCADE,
	tool_id TEXT NOT NULL REFERENCES tools(id) ON DELETE RESTRICT,
	work_url TEXT NOT NULL DEFAULT '',
	note TEXT NOT NULL DEFAULT '',
	position INTEGER NOT NULL CHECK (position >= 0),
	UNIQUE (piece_id, tool_id),
	UNIQUE (piece_id, position)
);

CREATE TABLE usage_source_snapshots (
	id TEXT PRIMARY KEY,
	usage_id TEXT NOT NULL REFERENCES piece_usages(id) ON DELETE CASCADE,
	label TEXT NOT NULL,
	url TEXT NOT NULL,
	timecode_seconds INTEGER CHECK (timecode_seconds IS NULL OR timecode_seconds >= 0),
	position INTEGER NOT NULL CHECK (position >= 0),
	UNIQUE (usage_id, position)
);

CREATE TABLE usage_tool_snapshots (
	id TEXT PRIMARY KEY,
	usage_id TEXT NOT NULL REFERENCES piece_usages(id) ON DELETE CASCADE,
	original_tool_id TEXT REFERENCES tools(id) ON DELETE SET NULL,
	name TEXT NOT NULL,
	start_url TEXT NOT NULL DEFAULT '',
	work_url TEXT NOT NULL DEFAULT '',
	note TEXT NOT NULL DEFAULT '',
	position INTEGER NOT NULL CHECK (position >= 0),
	UNIQUE (usage_id, position)
);

CREATE TABLE usage_topic_snapshots (
	usage_id TEXT NOT NULL REFERENCES piece_usages(id) ON DELETE CASCADE,
	name TEXT NOT NULL,
	position INTEGER NOT NULL CHECK (position >= 0),
	PRIMARY KEY (usage_id, position)
);

CREATE TABLE live_section_timers (
	id TEXT PRIMARY KEY,
	show_id TEXT NOT NULL REFERENCES shows(id) ON DELETE CASCADE,
	section_id TEXT NOT NULL REFERENCES show_sections(id) ON DELETE CASCADE,
	planned_duration_seconds INTEGER NOT NULL CHECK (planned_duration_seconds > 0),
	started_at_utc TEXT NOT NULL,
	ended_at_utc TEXT,
	CHECK (ended_at_utc IS NULL OR ended_at_utc >= started_at_utc)
);

CREATE TABLE live_section_timer_runs (
	id TEXT PRIMARY KEY,
	timer_id TEXT NOT NULL REFERENCES live_section_timers(id) ON DELETE CASCADE,
	started_at_utc TEXT NOT NULL,
	ended_at_utc TEXT,
	CHECK (ended_at_utc IS NULL OR ended_at_utc >= started_at_utc)
);

CREATE INDEX idx_piece_tools_piece ON piece_tools(piece_id, position);
CREATE INDEX idx_tool_formats_format ON tool_formats(format_id, tool_id);
CREATE INDEX idx_usage_sources_usage ON usage_source_snapshots(usage_id, position);
CREATE INDEX idx_usage_tools_usage ON usage_tool_snapshots(usage_id, position);
CREATE UNIQUE INDEX idx_one_open_section_timer_per_show
	ON live_section_timers(show_id) WHERE ended_at_utc IS NULL;
CREATE UNIQUE INDEX idx_one_open_run_per_section_timer
	ON live_section_timer_runs(timer_id) WHERE ended_at_utc IS NULL;

INSERT INTO usage_source_snapshots (
	id, usage_id, label, url, timecode_seconds, position
)
SELECT lower(hex(randomblob(16))), u.id, ps.label, ps.url, ps.timecode_seconds, ps.position
FROM piece_usages u
JOIN piece_sources ps ON ps.piece_id = u.original_piece_id;

INSERT INTO usage_topic_snapshots (usage_id, name, position)
SELECT usage_id, name, position
FROM (
	SELECT u.id AS usage_id, t.name,
		row_number() OVER (PARTITION BY u.id ORDER BY t.name, t.id) - 1 AS position
	FROM piece_usages u
	JOIN piece_topics pt ON pt.piece_id = u.original_piece_id
	JOIN topics t ON t.id = pt.topic_id
);