use serde_json::{json, Value};

pub fn verification_check_schema() -> Value {
    json!({
        "type": "object",
        "additionalProperties": false,
        "required": ["label", "commands"],
        "properties": {
            "label": { "type": "string" },
            "commands": {
                "type": "array",
                "items": { "type": "string" }
            }
        }
    })
}

pub fn planning_persona_schema() -> Value {
    json!({
        "type": "string",
        "enum": ["product-owner", "senior-engineer", "senior-maintainer"]
    })
}

pub fn planning_quality_decision_schema() -> Value {
    json!({
        "type": "string",
        "enum": ["accept", "downgraded", "blocked"]
    })
}

pub fn planning_quality_gate_schema() -> Value {
    json!({
        "type": "object",
        "additionalProperties": false,
        "required": ["quality_gate_version", "decision_code", "rationale_codes", "rationale"],
        "properties": {
            "quality_gate_version": { "type": "integer" },
            "decision_code": planning_quality_decision_schema(),
            "rationale_codes": { "type": "array", "items": { "type": "string" } },
            "rationale": { "type": "array", "items": { "type": "string" } }
        }
    })
}

pub fn planning_conflict_strategy_schema() -> Value {
    json!({
        "type": "string",
        "enum": ["latest-stage-wins", "append-unique", "replace"]
    })
}

pub fn planning_conflict_rule_schema() -> Value {
    json!({
        "type": "object",
        "additionalProperties": false,
        "required": ["field", "strategy"],
        "properties": {
            "field": { "type": "string" },
            "strategy": planning_conflict_strategy_schema()
        }
    })
}

pub fn planning_persona_evidence_schema() -> Value {
    json!({
        "type": "object",
        "additionalProperties": false,
        "required": ["facts", "assumptions", "questions"],
        "properties": {
            "facts": { "type": "array", "items": { "type": "string" } },
            "assumptions": { "type": "array", "items": { "type": "string" } },
            "questions": { "type": "array", "items": { "type": "string" } }
        }
    })
}

pub fn planning_persona_pass_schema() -> Value {
    json!({
        "type": "object",
        "additionalProperties": false,
        "required": [
            "persona",
            "intent",
            "constraints",
            "risks",
            "acceptance_criteria",
            "evidence"
        ],
        "properties": {
            "persona": planning_persona_schema(),
            "intent": { "type": "string" },
            "constraints": { "type": "array", "items": { "type": "string" } },
            "risks": { "type": "array", "items": { "type": "string" } },
            "acceptance_criteria": { "type": "array", "items": { "type": "string" } },
            "evidence": planning_persona_evidence_schema()
        }
    })
}

pub fn planning_contract_schema() -> Value {
    json!({
        "type": "object",
        "additionalProperties": false,
        "required": ["contract_version", "ordered_personas", "conflict_rules"],
        "properties": {
            "contract_version": { "type": "integer" },
            "ordered_personas": {
                "type": "array",
                "items": planning_persona_schema(),
                "minItems": 3,
                "maxItems": 3
            },
            "conflict_rules": {
                "type": "array",
                "items": planning_conflict_rule_schema()
            }
        }
    })
}

pub fn legacy_output_projection_schema() -> Value {
    json!({
        "type": "object",
        "additionalProperties": false,
        "required": ["goal_md_stage", "standards_md_stage", "plan_stage"],
        "properties": {
            "goal_md_stage": planning_persona_schema(),
            "standards_md_stage": planning_persona_schema(),
            "plan_stage": planning_persona_schema()
        }
    })
}

pub fn planner_contract_schema() -> Value {
    json!({
        "type": "object",
        "additionalProperties": false,
        "required": [
            "kind",
            "question",
            "goal_md",
            "standards_md",
            "plan",
            "planning_contract_version",
            "contract",
            "persona_passes",
            "quality_gate",
            "single_pass_projection"
        ],
        "properties": {
            "kind": { "type": "string", "enum": ["question", "final"] },
            "question": { "type": ["string", "null"] },
            "goal_md": { "type": ["string", "null"] },
            "standards_md": { "type": ["string", "null"] },
            "plan": {
                "anyOf": [
                    plan_schema(),
                    { "type": "null" }
                ]
            },
            "planning_contract_version": { "type": "integer" },
            "contract": planning_contract_schema(),
            "persona_passes": {
                "type": "array",
                "items": planning_persona_pass_schema()
            },
            "quality_gate": {
                "anyOf": [
                    planning_quality_gate_schema(),
                    { "type": "null" }
                ]
            },
            "single_pass_projection": {
                "anyOf": [
                    legacy_output_projection_schema(),
                    { "type": "null" }
                ]
            }
        }
    })
}

pub fn cleanup_rule_schema() -> Value {
    json!({
        "type": "object",
        "additionalProperties": false,
        "required": ["label", "description"],
        "properties": {
            "label": { "type": "string" },
            "description": { "type": "string" }
        }
    })
}

pub fn plan_step_schema() -> Value {
    json!({
        "type": "object",
        "additionalProperties": false,
        "required": [
            "id",
            "title",
            "purpose",
            "notes",
            "inputs",
            "outputs",
            "dependencies",
            "verification",
            "cleanup_requirements",
            "status",
            "attempts"
        ],
        "properties": {
            "id": { "type": "string" },
            "title": { "type": "string" },
            "purpose": { "type": "string" },
            "notes": { "type": "string" },
            "inputs": { "type": "array", "items": { "type": "string" } },
            "outputs": { "type": "array", "items": { "type": "string" } },
            "dependencies": { "type": "array", "items": { "type": "string" } },
            "verification": {
                "type": "array",
                "items": verification_check_schema()
            },
            "cleanup_requirements": {
                "type": "array",
                "items": cleanup_rule_schema()
            },
            "status": {
                "type": "string",
                "enum": ["todo", "active", "done", "blocked"]
            },
            "attempts": { "type": "integer" }
        }
    })
}

pub fn plan_schema() -> Value {
    json!({
        "type": "object",
        "additionalProperties": false,
        "required": ["version", "goal_summary", "steps"],
        "properties": {
            "version": { "type": "integer" },
            "goal_summary": { "type": "string" },
            "steps": {
                "type": "array",
                "items": plan_step_schema()
            }
        }
    })
}

pub fn plan_delta_schema() -> Value {
    json!({
        "type": "object",
        "additionalProperties": false,
        "required": ["goal_summary", "step_updates", "remove_step_ids", "pending_step_order"],
        "properties": {
            "goal_summary": { "type": ["string", "null"] },
            "step_updates": {
                "type": "array",
                "items": plan_step_schema()
            },
            "remove_step_ids": {
                "type": "array",
                "items": { "type": "string" }
            },
            "pending_step_order": {
                "type": "array",
                "items": { "type": "string" }
            }
        }
    })
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn plan_schema_locks_down_nested_objects() {
        let schema = plan_schema();
        assert_eq!(schema["additionalProperties"], false);
        assert_eq!(
            schema["properties"]["steps"]["items"]["additionalProperties"],
            false
        );
        assert_eq!(
            schema["properties"]["steps"]["items"]["properties"]["verification"]["items"]
                ["additionalProperties"],
            false
        );
        assert_eq!(
            schema["properties"]["steps"]["items"]["properties"]["cleanup_requirements"]["items"]
                ["additionalProperties"],
            false
        );
        assert_eq!(
            schema["properties"]["steps"]["items"]["properties"]["notes"]["type"],
            "string"
        );
    }

    #[test]
    fn plan_delta_schema_allows_partial_replans() {
        let schema = plan_delta_schema();
        assert_eq!(schema["additionalProperties"], false);
        assert_eq!(
            schema["required"],
            json!([
                "goal_summary",
                "step_updates",
                "remove_step_ids",
                "pending_step_order"
            ])
        );
        assert_eq!(
            schema["properties"]["goal_summary"]["type"],
            json!(["string", "null"])
        );
        assert_eq!(
            schema["properties"]["step_updates"]["items"]["additionalProperties"],
            false
        );
    }

    #[test]
    fn planner_contract_schema_carries_three_pass_contract_fields() {
        let schema = planner_contract_schema();
        assert_eq!(
            schema["required"],
            json!(["kind","question","goal_md","standards_md","plan","planning_contract_version","contract","persona_passes","quality_gate","single_pass_projection"])
        );
        assert_eq!(
            schema["properties"]["contract"]["required"],
            json!(["contract_version","ordered_personas","conflict_rules"])
        );
        assert!(schema["properties"]["quality_gate"].is_object());
    }
}