// SPDX-FileCopyrightText: 2020 NIRMAL MANOJ C <nimmumanoj@gmail.com>
// SPDX-License-Identifier: LGPL-3.0-only
#include <rz_util/rz_annotated_code.h>

#include <rz_util.h>
#include <rz_core.h>
#include <rz_types.h>
#include <rz_vector.h>

RZ_API void rz_core_annotated_code_print_json(RzAnnotatedCode *code) {
	PJ *pj = pj_new();
	if (!pj) {
		return;
	}

	pj_o(pj);
	pj_ks(pj, "code", code->code);

	pj_k(pj, "annotations");
	pj_a(pj);

	char *type_str;
	RzCodeAnnotation *annotation;
	rz_vector_foreach (&code->annotations, annotation) {
		pj_o(pj);
		pj_kn(pj, "start", (ut64)annotation->start);
		pj_kn(pj, "end", (ut64)annotation->end);
		switch (annotation->type) {
		case RZ_CODE_ANNOTATION_TYPE_OFFSET:
			pj_ks(pj, "type", "offset");
			pj_kn(pj, "offset", annotation->offset.offset);
			break;
		case RZ_CODE_ANNOTATION_TYPE_FUNCTION_NAME:
			pj_ks(pj, "type", "function_name");
			pj_ks(pj, "name", annotation->reference.name);
			pj_kn(pj, "offset", annotation->reference.offset);
			break;
		case RZ_CODE_ANNOTATION_TYPE_GLOBAL_VARIABLE:
			pj_ks(pj, "type", "global_variable");
			pj_kn(pj, "offset", annotation->reference.offset);
			break;
		case RZ_CODE_ANNOTATION_TYPE_CONSTANT_VARIABLE:
			pj_ks(pj, "type", "constant_variable");
			pj_kn(pj, "offset", annotation->reference.offset);
			break;
		case RZ_CODE_ANNOTATION_TYPE_LOCAL_VARIABLE:
			pj_ks(pj, "type", "local_variable");
			pj_ks(pj, "name", annotation->variable.name);
			break;
		case RZ_CODE_ANNOTATION_TYPE_FUNCTION_PARAMETER:
			pj_ks(pj, "type", "function_parameter");
			pj_ks(pj, "name", annotation->variable.name);
			break;
		case RZ_CODE_ANNOTATION_TYPE_SYNTAX_HIGHLIGHT:
			pj_ks(pj, "type", "syntax_highlight");
			type_str = NULL;
			switch (annotation->syntax_highlight.type) {
			case RZ_SYNTAX_HIGHLIGHT_TYPE_KEYWORD:
				type_str = "keyword";
				break;
			case RZ_SYNTAX_HIGHLIGHT_TYPE_COMMENT:
				type_str = "comment";
				break;
			case RZ_SYNTAX_HIGHLIGHT_TYPE_DATATYPE:
				type_str = "datatype";
				break;
			case RZ_SYNTAX_HIGHLIGHT_TYPE_FUNCTION_NAME:
				type_str = "function_name";
				break;
			case RZ_SYNTAX_HIGHLIGHT_TYPE_FUNCTION_PARAMETER:
				type_str = "function_parameter";
				break;
			case RZ_SYNTAX_HIGHLIGHT_TYPE_LOCAL_VARIABLE:
				type_str = "local_variable";
				break;
			case RZ_SYNTAX_HIGHLIGHT_TYPE_CONSTANT_VARIABLE:
				type_str = "constant_variable";
				break;
			case RZ_SYNTAX_HIGHLIGHT_TYPE_GLOBAL_VARIABLE:
				type_str = "global_variable";
				break;
			}
			if (type_str) {
				pj_ks(pj, "syntax_highlight", type_str);
			}
			break;
		}
		pj_end(pj);
	}
	pj_end(pj);

	pj_end(pj);
	rz_cons_printf("%s\n", pj_string(pj));
	pj_free(pj);
}

#define PALETTE(x) (cons && cons->context->pal.x) ? cons->context->pal.x
#define PRINT_COLOR(x) \
	do { \
		if (cons->context->color_mode) { \
			rz_cons_printf("%s", (x)); \
		} \
	} while (0)

/**
 * @param width maximum nibbles per address
 */
static void print_offset_in_binary_line_bar(RzAnnotatedCode *code, ut64 offset, size_t width) {
	static const char *fmt[9] = {
		"0x%08" PFMT64x,
		"0x%09" PFMT64x,
		"0x%010" PFMT64x,
		"0x%011" PFMT64x,
		"0x%012" PFMT64x,
		"0x%013" PFMT64x,
		"0x%014" PFMT64x,
		"0x%015" PFMT64x,
		"0x%016" PFMT64x
	};
	if (width < 8) {
		width = 8;
	}
	if (width > 16) {
		width = 16;
	}
	width -= 8;

	RzCons *cons = rz_cons_singleton();
	rz_cons_printf("    ");
	if (offset == UT64_MAX) {
		rz_cons_print("          ");
		while (width > 0) {
			rz_cons_print(" ");
			width--;
		}
	} else {
		PRINT_COLOR(PALETTE(offset)
			    : Color_GREEN);
		rz_cons_printf(fmt[width], offset);
		PRINT_COLOR(Color_RESET);
	}
	rz_cons_printf("    |");
}

RZ_API void rz_core_annotated_code_print(RzAnnotatedCode *code, RzVector /*<ut64>*/ *line_offsets) {
	if (code->annotations.len == 0) {
		rz_cons_printf("%s\n", code->code);
		return;
	}

	size_t cur = 0;
	size_t line_idx = 0;
	size_t len = strlen(code->code);

	size_t offset_width = 0;
	if (line_offsets) {
		ut64 *offset;
		ut64 offset_max = 0;
		rz_vector_foreach (line_offsets, offset) {
			if (*offset != UT64_MAX && *offset > offset_max) {
				offset_max = *offset;
			}
		}
		while (offset_max) {
			offset_width += 1;
			offset_max >>= 4;
		}
		if (offset_width < 4) {
			offset_width = 4;
		}
	}

	RzCons *cons = rz_cons_singleton();
	RzCodeAnnotation *annotation;
	rz_vector_foreach (&code->annotations, annotation) {
		if (annotation->type != RZ_CODE_ANNOTATION_TYPE_SYNTAX_HIGHLIGHT) {
			continue;
		}

		// (1/3)
		// now we have a syntax highlighting annotation.
		// pick a suitable color for it.
		const char *color = Color_RESET;
		switch (annotation->syntax_highlight.type) {
		case RZ_SYNTAX_HIGHLIGHT_TYPE_COMMENT:
			color = PALETTE(comment)
			    : Color_WHITE;
			break;
		case RZ_SYNTAX_HIGHLIGHT_TYPE_KEYWORD:
			color = PALETTE(pop)
			    : Color_MAGENTA;
			break;
		case RZ_SYNTAX_HIGHLIGHT_TYPE_DATATYPE:
			color = PALETTE(func_var_type)
			    : Color_BLUE;
			break;
		case RZ_SYNTAX_HIGHLIGHT_TYPE_FUNCTION_NAME:
			color = PALETTE(fname)
			    : Color_RED;
			break;
		case RZ_SYNTAX_HIGHLIGHT_TYPE_CONSTANT_VARIABLE:
			color = PALETTE(num)
			    : Color_YELLOW;
		default:
			break;
		}

		// (2/3)
		// the chunk before the syntax highlighting annotation should not be colored
		for (; cur < annotation->start && cur < len; cur++) {
			// if we are starting a new line and we are printing with offsets
			// we need to prepare the bar with offsets on the left handside before that
			if (line_offsets && (cur == 0 || code->code[cur - 1] == '\n')) {
				ut64 offset = 0;
				if (line_idx < line_offsets->len) {
					offset = *(ut64 *)rz_vector_index_ptr(line_offsets, line_idx);
				}
				print_offset_in_binary_line_bar(code, offset, offset_width);
				line_idx++;
			}
			rz_cons_printf("%c", code->code[cur]);
		}

		// (3/3)
		// everything in between the "start" and the "end" inclusive should be highlighted
		PRINT_COLOR(color);
		for (; cur < annotation->end && cur < len; cur++) {
			// if we are starting a new line and we are printing with offsets
			// we need to prepare the bar with offsets on the left handside before that
			if (line_offsets && (cur == 0 || code->code[cur - 1] == '\n')) {
				ut64 offset = 0;
				if (line_idx < line_offsets->len) {
					offset = *(ut64 *)rz_vector_index_ptr(line_offsets, line_idx);
				}
				PRINT_COLOR(Color_RESET);
				print_offset_in_binary_line_bar(code, offset, offset_width);
				PRINT_COLOR(color);
				line_idx++;
			}
			rz_cons_printf("%c", code->code[cur]);
		}
		PRINT_COLOR(Color_RESET);
	}
	// the rest of the decompiled code should be printed
	// without any highlighting since we don't have any annotations left
	for (; cur < len; cur++) {
		// if we are starting a new line and we are printing with offsets
		// we need to prepare the bar with offsets on the left handside before that
		if (line_offsets && (cur == 0 || code->code[cur - 1] == '\n')) {
			ut64 offset = 0;
			if (line_idx < line_offsets->len) {
				offset = *(ut64 *)rz_vector_index_ptr(line_offsets, line_idx);
			}
			print_offset_in_binary_line_bar(code, offset, offset_width);
			line_idx++;
		}
		rz_cons_printf("%c", code->code[cur]);
	}
}

static bool foreach_offset_annotation(void *user, const ut64 offset, const void *val) {
	RzAnnotatedCode *code = user;
	const RzCodeAnnotation *annotation = val;
	char *b64statement = rz_base64_encode_dyn((const ut8 *)(code->code + annotation->start),
		annotation->end - annotation->start);
	rz_cons_printf("CCu base64:%s @ 0x%" PFMT64x "\n", b64statement, annotation->offset.offset);
	free(b64statement);
	return true;
}

RZ_API void rz_core_annotated_code_print_comment_cmds(RzAnnotatedCode *code) {
	RzCodeAnnotation *annotation;
	HtUP *ht = ht_up_new(NULL, NULL);
	rz_vector_foreach (&code->annotations, annotation) {
		if (annotation->type != RZ_CODE_ANNOTATION_TYPE_OFFSET) {
			continue;
		}
		// choose the "best" annotation at a single offset
		RzCodeAnnotation *prev_annot = ht_up_find(ht, annotation->offset.offset, NULL);
		if (prev_annot) {
			if (annotation->end - annotation->start < prev_annot->end - prev_annot->start) {
				continue;
			}
		}
		ht_up_update(ht, annotation->offset.offset, annotation);
	}
	ht_up_foreach(ht, foreach_offset_annotation, code);
	ht_up_free(ht);
}
