-- Bot Persona A/B Testing
-- Adds: bot_persona_variants, bot_persona_experiments, bot_persona_assignments, bot_persona_metrics

CREATE TABLE `bot_persona_variants` (
  `id`                INT          NOT NULL AUTO_INCREMENT,
  `bot_id`            INT          NOT NULL,
  `experiment_id`     INT          NULL,
  `variant_key`       VARCHAR(20)  NOT NULL,
  `label`             VARCHAR(50)  NOT NULL,
  `description`       VARCHAR(200) NULL,
  `stance_keywords`   JSON         NULL,
  `top_topic_types`   JSON         NULL,
  `top_human_users`   JSON         NULL,
  `style_hints`       JSON         NULL,
  `weight`            FLOAT        NOT NULL DEFAULT 0.5,
  `is_control`        BOOLEAN      NOT NULL DEFAULT FALSE,
  `is_active`         BOOLEAN      NOT NULL DEFAULT TRUE,
  `sample_count`      INT          NOT NULL DEFAULT 0,
  `reply_count`       INT          NOT NULL DEFAULT 0,
  `like_count`        INT          NOT NULL DEFAULT 0,
  `human_reply_count` INT          NOT NULL DEFAULT 0,
  `engagement_score`  FLOAT        NOT NULL DEFAULT 0,
  `created_at`        DATETIME(3)  NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
  `updated_at`        DATETIME(3)  NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3),
  PRIMARY KEY (`id`),
  UNIQUE INDEX `bot_persona_variants_bot_id_variant_key_key`(`bot_id`, `variant_key`),
  INDEX `bot_persona_variants_bot_id_is_active_idx`(`bot_id`, `is_active`),
  INDEX `bot_persona_variants_experiment_id_idx`(`experiment_id`)
);

CREATE TABLE `bot_persona_experiments` (
  `id`                  INT          NOT NULL AUTO_INCREMENT,
  `bot_id`              INT          NOT NULL,
  `name`                VARCHAR(80)  NOT NULL,
  `description`         VARCHAR(200) NULL,
  `status`              VARCHAR(20)  NOT NULL DEFAULT 'active',
  `winner_variant_key`  VARCHAR(20)  NULL,
  `min_samples_per_arm` INT          NOT NULL DEFAULT 20,
  `significance_level`  FLOAT        NOT NULL DEFAULT 0.1,
  `primary_metric`      VARCHAR(30)  NOT NULL DEFAULT 'engagement_score',
  `config`              JSON         NULL,
  `started_at`          DATETIME(3)  NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
  `ended_at`            DATETIME(3)  NULL,
  `last_analyzed_at`    DATETIME(3)  NULL,
  `created_at`          DATETIME(3)  NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
  `updated_at`          DATETIME(3)  NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3),
  PRIMARY KEY (`id`),
  INDEX `bot_persona_experiments_bot_id_status_idx`(`bot_id`, `status`),
  INDEX `bot_persona_experiments_status_idx`(`status`)
);

CREATE TABLE `bot_persona_assignments` (
  `id`             INT          NOT NULL AUTO_INCREMENT,
  `bot_id`         INT          NOT NULL,
  `variant_id`     INT          NOT NULL,
  `ref_type`       VARCHAR(20)  NOT NULL,
  `ref_id`         INT          NOT NULL,
  `forum_slug`     VARCHAR(30)  NULL,
  `replies`        INT          NOT NULL DEFAULT 0,
  `likes`          INT          NOT NULL DEFAULT 0,
  `human_replies`  INT          NOT NULL DEFAULT 0,
  `impressions`    INT          NOT NULL DEFAULT 0,
  `created_at`     DATETIME(3)  NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
  `updated_at`     DATETIME(3)  NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3),
  PRIMARY KEY (`id`),
  UNIQUE INDEX `bot_persona_assignments_ref_type_ref_id_key`(`ref_type`, `ref_id`),
  INDEX `bot_persona_assignments_bot_id_variant_id_idx`(`bot_id`, `variant_id`),
  INDEX `bot_persona_assignments_variant_id_created_at_idx`(`variant_id`, `created_at`)
);

CREATE TABLE `bot_persona_metrics` (
  `id`             INT          NOT NULL AUTO_INCREMENT,
  `variant_id`     INT          NOT NULL,
  `date`           DATE         NOT NULL,
  `impressions`    INT          NOT NULL DEFAULT 0,
  `replies`        INT          NOT NULL DEFAULT 0,
  `likes`          INT          NOT NULL DEFAULT 0,
  `human_replies`  INT          NOT NULL DEFAULT 0,
  `content_count`  INT          NOT NULL DEFAULT 0,
  `avg_replies`    FLOAT        NOT NULL DEFAULT 0,
  `avg_likes`      FLOAT        NOT NULL DEFAULT 0,
  `computed_score` FLOAT        NOT NULL DEFAULT 0,
  `updated_at`     DATETIME(3)  NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3),
  PRIMARY KEY (`id`),
  UNIQUE INDEX `bot_persona_metrics_variant_id_date_key`(`variant_id`, `date`),
  INDEX `bot_persona_metrics_date_idx`(`date`)
);