CREATE DATABASE dragon_fire;

USE dragon_fire;

-- DROP TABLE posts;
-- DROP TABLE path_access_counts;
-- DROP TABLE path_errcodes;
-- DROP TABLE feed_cache;

CREATE TABLE dev_posts (
	post_id INTEGER AUTO_INCREMENT,

	post_path VARCHAR(255) NOT NULL,
	post_path_depth INTEGER NOT NULL DEFAULT 0,

	post_created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
	post_updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,

	post_view_count INTEGER DEFAULT 0,

	post_title 	VARCHAR(1024),
	post_tags 	VARCHAR(1024),
	post_brief  TEXT(2048),

	post_metadata JSON DEFAULT NULL,
	post_settings_cache JSON DEFAULT NULL,

	post_counters JSON DEFAULT NULL,

	PRIMARY KEY(post_id),
	CONSTRAINT unique_post UNIQUE (post_path),

	INDEX(post_path),
	INDEX(post_path_depth, post_path),

	INDEX(post_created_at),
	INDEX(post_updated_at),

	FULLTEXT(post_path),
	FULLTEXT(post_tags),
	FULLTEXT(post_title),
	FULLTEXT(post_brief)
);

CREATE TABLE dev_post_markdown (
	post_id INTEGER,

	post_markdown TEXT,

	PRIMARY KEY(post_id),
	FOREIGN KEY(post_id) REFERENCES dev_posts(post_id)
		ON DELETE CASCADE,

	FULLTEXT(post_markdown)
);

CREATE TABLE dev_feeds (
	post_id 	INTEGER NOT NULL,
	feed_key	VARCHAR(32),
	feed_id	 	VARCHAR(40) NOT NULL,

	feed_created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,

	feed_metadata	JSON DEFAULT NULL,

	feed_text		TEXT,

-- Primary key as true ID to allow for deterministic saving/recreating
	CONSTRAINT PK_FEED PRIMARY KEY(post_id, feed_key, feed_id),
	FOREIGN KEY(post_id) REFERENCES dev_posts(post_id)
		ON DELETE CASCADE,

-- Make it possible to look up changes from e.g. a commit hash inexpensively
	INDEX(feed_id),
-- Make it possible to look up specific post feeds efficiently (e.g. changelog)
	INDEX(post_id, feed_key, feed_created_at),
-- Make it possible to globally look up specific feeds efficiently
	INDEX(feed_key, feed_created_at),
-- And just in general, make searching feeds in a timeframe efficient
	INDEX(feed_created_at),

	FULLTEXT(feed_text)
);

CREATE TABLE analytics_summations (
	time_bucket DATETIME NOT NULL,
	metric VARCHAR(16) NOT NULL,
	tags JSON NOT NULL,

	metric_value DOUBLE PRECISION DEFAULT 0,

	tags_md5 CHAR(32) AS (MD5(tags)),

	INDEX(time_bucket, metric),
	CONSTRAINT unique_analytic UNIQUE(time_bucket, metric, tags_md5)
);

CREATE TABLE analytics_events (
	event_time DATETIME NOT NULL,
	metric VARCHAR(64) NOT NULL DEFAULT 'error_msg',
	tags JSON NOT NULL,

	event_text TEXT,

	INDEX(event_time)
);